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Effects of Water Stress on Growth and Development in Cotton （Gossypium hirsutum L.） ZHENG Zipiao, XU Haijiang, CUI Jianping, LIN Tao, GUO Rensong, WANG Liang, ZHANG Dawei, WEI Xin, KONG fanyang Xinjiang Agricultural Sciences    2022, 59 (8): 1821-1830.   DOI: 10.6048/j.issn.1001-4330.2022.08.001 Abstract （358）   HTML （103）    PDF （10382KB）（166）       Knowledge map    【Objective】 The aim was to study the effect of water stress on growth and development in different cotton varieties,selected drought-resistant germplasm resources. It can help providing reference for drought-resistant breed selection. 【Method】 Eleven cotton varieties（strains） were used to investigate under normal irrigation（3,600 m3/hm2） and water stress（1,800 m3/hm2） condition,which for exploring the diversity of growth progress,morphological indexes,dry matter accumulation,antioxidant enzyme activity change and yield components. 【Result】 Water stress accelerated the growth progress of cotton,growth stages reduced 1-5 days of eleven cotton varieties（strains）. The lack of water inhibited the growth of cotton plant,which also resulted in a decrease of fruit branch and bud number. Under the water stress condition,dry matter accumulation per plant reduced 0.70 g,5.68 g and 2.18 g in seedling stage,boll forming stage and boll opening stage. At the same time,the number of effective bolls per plant and the single boll weight decreased by 0.89 and 0.23 g. The reduction of seed cotton yield ranged from 1.93% to 37.14%. Antioxidant enzyme activity changed of eleven cotton varieties（strains）,the activity of SOD,POD,CAT all went up of three cotton varieties（strains） Under water stress. 【Conclusion】 Considered all experimental varieties performance of growth progress,agronomic characters,dry matter accumulation,antioxidant enzyme activity change and yield characters,we found that the Growth and Development of number 9 and 2 were better under the water stress condition. And its yield reduction was insignificant. Cotton varieties 9 and 2 had the better drought resistance under the test condition. Table and Figures | Reference | Related Articles | Metrics | Comments（0）

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Effects of agronomic characters and photosynthetic parameters of glyphosate on sea island cotton QIN Guoli, WANG Weiran, WANG Meng, YANG Jing, HUANG Xinglei, LIU Zhiqing, ZHU Jiahui, Alifu Aierxi, KONG Jie, CHEN Guodong Xinjiang Agricultural Sciences    2023, 60 (12): 2861-2868.   DOI: 10.6048/j.issn.1001-4330.2023.12.001 Abstract （364）   HTML （33）    PDF （1491KB）（160）       Knowledge map    【Objective】To study the effects of agronomical character and leaf photosynthetic parameters by different concentrations of glyphosate on glyphosate island cotton in the hope of providing chemical skills for weeding.【Methods】Using glyphosate-resistant Xinchangmian 5 as the research object and spraying four concentrations of glyphosate1.25%, 2.5%, 5.0%, 10.0% at 10 leaf stage, respectively, then plant height, stem diameter, leaf stage and photosynthetic indexes were measured.【Results】Compared with the control, plant height, stem diameter, leaf stage, chlorophyll content, net photosynthetic rate (Pn), stomatal conductance (Gs), transpiration rate (Tr), maximum photochemical efficiency of PSⅡ(Fv/Fm) and potential activity of PSⅡ(Fv/Fo) with treated by four concentrations of glyphosate were all decreased in sea island cotton. The glyphosate with higher concentrations, the more dramatic decline. However, the intercellular CO2 concentration (Ci) showed an increasing trend. The treatment by 1.25% and 2.5% had no difference with control after 14 days of spraying, and the agronomic traits returned to the normal level after 24 days.【Conclusion】The growth trends reduce significantly by spraying 4 concentrations of glyphosate at the bud stage. More than 5% concentration of glyphosate affect the growth seriously sea island cotton Xinchangmian 5, so it is suggested that concentration below 2.5% of glyphosate be applied in production. Table and Figures | Reference | Related Articles | Metrics | Comments（0）

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Xinjiang Agricultural Sciences    2022, 59 (12): 0-0.   Abstract （106）      PDF （14418KB）（135）       Knowledge map    Related Articles | Metrics | Comments（0）

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Effects of Different Concentrations of NaCl Stress on Seed Embryo Protective Enzyme Activity during Cotton Germination ZHANG Hongxia, YONG Xiaoyu, HE Fei, XIA Jun, LI Huiqin, WANG Tangang Xinjiang Agricultural Sciences    2023, 60 (1): 1-10.   DOI: 10.6048/j.issn.1001-4330.2023.01.001 Abstract （88）   HTML （3）    PDF （1627KB）（129）       Knowledge map    【Objective】 To study the effects of different concentrations of NaCl stress on germination characteristics and key enzyme activities of cotton seeds. 【Method】 Xinluzao 45 and Xinluzao 65 were used as the testing materials and different concentrations of NaCl stress were set to determine relative water content, germination potential, germination rate, proline(Pro), soluble protein(SP), superoxide dismutase, (SOD), catalase (CAT), malonaldehyde(MDA). 【Result】 With the prolongation of the salt stress treatment time, the relative water content continued to increase within 0-15 h, gradually flattened from 15-60 h, and the relative water content showed an upward trend at 63 h.The relative water content of Xinluzao 45 seeds under different NaCl concentrations showed that: 0.2% was higher than the control relative water content, and 0.8% relative water content was the lowest; there was no significant difference between the different concentration treatments of Xinluzao 65.Among the varieties, Xinluzao 65 had a higher water absorption rate than Xinluzao 45, and the relative water content was: Xinluzao 65 > Xinluzao 45. 【Conclusion】 Salt stress in a certain range makes cotton seeds improve their salt tolerance by increasing SOD and CAT activities and reducing MDA content, thus reducing the damage of salt stress on seedling emergence. Table and Figures | Reference | Related Articles | Metrics | Comments（0）

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Evaluation and index screening of heat resistance of Gossypium hirsutum germplasm resources WANG Peng, ZHENG Kai, ZHAO Jieyin, GAO Wenju, LONG Yilei, CHEN Quanjia, QU Yanying Xinjiang Agricultural Sciences    2023, 60 (9): 2081-2090.   DOI: 10.6048/j.issn.1001-4330.2023.09.001 Abstract （384）   HTML （49）    PDF （1450KB）（129）       Knowledge map    【Objective】 This study first comprehensively evaluated the heat resistance of 24 Gossypium hirsutum germplasm resources.【Methods】 Based on the two-year comprehensive evaluation of heat resistance D value cluster analysis.Selecting 24 cotton germplasm materials.Randomized block design.Measurement of relevant indicators.【Results】 It was found that 24 Gossypium hirsutum resource materials could be divided into 3 categories.The first category was heat-resistant materials, the second category was intermediate-type materials, and the third category was heat-sensitive materials.An evaluation model for the heat resistance of Gossypium hirsutum was established through a stepwise regression equation: D=-0.111+0.175X2+0.470X3+1.211X4 (R2=0.914,8).According to the established optimal regression equation, the heat resistance of Gossypium hirsutum materials, the comprehensive evaluation indexes of cotton heat resistance were established.Correlation analysis and difference analysis found that seed cotton yield, boll weight and lint yield could be used as evaluation indicators of cotton field heat resistance, while plant height and lint had nothing to do with heat resistance.【Conclusion】 In this study, four heat-resistant Gossypium hirsutum resource materials were selected, and the seed cotton yield, boll weight and lint yield were established as the indicators for evaluating the field heat resistance of Gossypium hirsutum, and the peroxidase, malondialdehyde and chlorophyll content were used indoors.The index of heat resistance evaluation provides a reference for the rapid breeding of heat-resistant cotton varieties and the research of cotton heat-resistant mechanism. Table and Figures | Reference | Related Articles | Metrics | Comments（0）

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Evaluation on Drought Resistance of Recombinant Inbred Lines of Gossypium barbadense L. at Flowering and Boll Stages YANG Long, ZHAO Fuxiang, DUAN Yajie, CAI Yongsheng, ZHENG Kai, CHEN Qin, CHEN Quanjia, QU Yanying Xinjiang Agricultural Sciences    2022, 59 (12): 2861-2869.   DOI: 10.6048/j.issn.1001-4330.2022.12.001 Abstract （384）   HTML （86）    PDF （966KB）（125）       Knowledge map    【Objective】 To provide raw materials for the improvement of drought-resistant cotton germplasm and breeding of high-quality stress-resistant varieties by constructing isolated populations of Gossypium barbadense L. and screening resistant and sensitive extreme materials,which provides a basis for future research on cotton drought resistance.【Methods】 71 strains of parents and Haihai recombinant inbred line populations were takne as experimental materials, the field was subjected to natural drought stress at the flowering and boll stage, and morphological indicators and yield-related indicators were measured. Meanwhile, variance analysis, principal component analysis, and clustering analysis were employed simultaneously to identify and evaluate the drought resistance of parents and RILs families.【Results】 Principal component analysis of 7 traits could be divided into two comprehensive factors: plant morphology, yield-related traits per plant, and fiber yield-related traits; based on the comprehensive drought resistance measure (D value) for systematic clustering, the RILs materials were divided into four groups: more drought-sensitive type (28), drought-resistant type (26), drought-sensitive type (14) and strong drought-resistant type (3). When the drought resistance coefficient of each trait was used as the independent variable and the D value as the dependent variable for regression analysis, a multivariate linear model was obtained: D value= -0.771+0.089×DC Plant height + 0.117× DC number of effective branches+0.132×DC number of bells+0.343×DC effective number of bells +0.338×DC single boll lint weight+0.230× DC Cotton yield per plant.【Conclusion】 The strong drought-resistant materials HH-16, HH-61, HH-70 and the drought-sensitive materials HH-051 and HH-05 are screened out, which can be applied to the analysis of drought-related gene expression and the innovation of stress-resistant germplasm. The results of principal component analysis and multiple regression analysis show that the effective boll number, lint weight per boll and cotton yield per plant can be used as the main indicators for the identification of drought resistance of cotton inbred lines in the field. Table and Figures | Reference | Related Articles | Metrics | Comments（0）

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QTL mapping and genomic selection of maize leaf width SUN Fenglei, REN Jiaojiao, LEI Bin, GAO Wenwei, QU Yanying Xinjiang Agricultural Sciences    2023, 60 (10): 2341-2351.   DOI: 10.6048/j.issn.1001-4330.2023.10.001 Abstract （337）   HTML （59）    PDF （1733KB）（119）       Knowledge map    【Objective】 To discover candidate genes related to drought resistance in the hope of providing theoretical basis for subsequent identification and identification and evaluation of drought resistance of cotton and research on drought resistance genes.【Methods】 In this experiment, 20 extreme drought and drought sensitive materials selected from recombinant inbred lines were constructed from Upland Cotton Shiyuan 321 and Kui 85-174.The extreme drought and extremely sensitive drought pools were constructed respectively, BSA sequencing was analyzed with the parents, and candidate genes were mined by BSA sequencing analysis using the upland cotton genome as a reference.【Results】 The results showed that they were finally associated with 3 related candidate regions.The total length of the candidate regions was 6.12 Mb, which contained a total of 86 genes.Combining GO annotation, KEGG pathway and five key indicators selected in the previous stage, through qRT-PCR detection and analysis, a total of 5 candidate genes were finally determined.【Conclusion】 The expression levels of the five genes in leaves were significantly higher than those in roots and stems.And the expression levels in drought-resistant materials were all higher materials with weak drought resistance, and the overall trend was “rising first and then falling”. Table and Figures | Reference | Related Articles | Metrics | Comments（0）

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Effects of Different Concentrations of Chemical Topping Agents on Agronomic Traits, Yield and Quality of Cotton TANG Jiyuan, CHEN Minzhi, YAN Jiangwei, WANG Yunxuan, ZUO Wenqing, TIAN Jingshan, ZHANG Wangfeng Xinjiang Agricultural Sciences    2022, 59 (7): 1561-1572.   DOI: 10.6048/j.issn.1001-4330.2022.07.001 Abstract （1967）   HTML （79）    PDF （1751KB）（112）       Knowledge map    【Objective】 To study the effects of DPC+with different concentrations of chemical topping agent on different varieties of cotton in the hope of providing a theoretical basis for the application of cotton chemical topping technology in Xinjiang.【Method】 Three cultivars were used in this experimental, which were Xinluzao 61, Xinluzao 67, Xinluzao 72. And three concentration gradients of chemical topping agents were set, among which the low concentration was 90 g/hm2+60 ml/hm2 (dactyl amine + additive); Medium concentration: 180 g/hm2+120 ml/hm2; High concentration: 270 g/hm2+180 ml/hm2, with no topping and manual topping as control to study the agronomic traits, yield and fiber quality of cotton.【Results】 Compared with no topping, chemical topping effectively controlled the agronomic traits of cotton plants. Under high concentration (270 g/hm2+180 ml/hm2), the plant height increased by 3.0~8.7cm, the number of fruit branches increased by 0.8~1.93, the plant width decreased by 1.4%~3.4%, and the number of internodes of main stem increased by 0.7~1.2 compared with the manual topping. For yield factor and fiber quality, there was no significant difference between each concentration treatment and manual topping treatment. 【Conclusion】 The use of high concentration DPC+ has better topping effect. The use of chemical topping with DPC+ can effectively replace manual topping, and the yield and quality are not reduced. Table and Figures | Reference | Related Articles | Metrics | Comments（0）

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Xinjiang Agricultural Sciences    2023, 60 (12): 0-0.   Abstract （121）      PDF （27546KB）（111）       Knowledge map    Related Articles | Metrics | Comments（0）

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Effects of different seedling emergence water on soil salt content and cotton growth WAN Yanan, XING Zhi, SHI Yuanqiang, WANG Tangang, WANG Jichuan, LI Huiqin, MA Li, LI Wenjun, WU Bingrong Xinjiang Agricultural Sciences    2023, 60 (10): 2352-2360.   DOI: 10.6048/j.issn.1001-4330.2023.10.002 Abstract （1502）   HTML （28）    PDF （1320KB）（103）       Knowledge map    【Objective】 This study aims to study the effects of drip seedling emergence on soil salt characteristics and cotton growth in cotton field in southern Xinjiang under the condition of no irrigation in winter and spring.【Methods】 Xinluzhong 67 was taken as the test material, three seedling emergence water quantities, 150 m3/hm2 (W1), 300 m3/hm2 (W2) and 450 m3/hm2 (W3) respectively, were set to observe the dynamic changes of soil pH and salt content, cotton seedling emergence rate, agronomic characters, dry matter accumulation characteristics and yield characteristics.【Results】 The pH of topsoil treated with W3, W2 and W1 decreased by 0.57, 0.43 and 0.19, respectively at the seedling stage, and the salt content decreased by 44.19%, 38.70% and 28.72%, respectively, but the salt washing effect decreased gradually after the full bud stage.The emergence rate of W2 treatment was 87.31%, which increased by 11.44 and 5.78 percentage points respectively compared with W3 and W1.The greater the amount of seedling emergence water, the greater the index value of cotton agronomic characters.The plant height and stem diameter of W3 treatment increased by 2.71%, 8.31% and 5.15%, 8.18%, respectively compared with W2 and W1.The average leaf area index (LAI) of W3 treatment increased by 7.57% and 11.46%, respectively compared with W2 and W1.The total dry matter accumulation of shoot treated with W3 increased by 5.55% and 7.75%, respectively compared with W2 and W1.The dry matter distribution coefficient of stem was W1 > W2 > W3, and that of leaf and reproductive organ was W3 > W2 > W1.The amount of seedling emergence water had a certain impact on the number of bolls per plant, but had little impact on the boll weight and lint percentage.The number of bolls per plant, boll weight and lint percentage of W3 treatment were the largest, but the harvested density of W2 treatment was the largest, and the final yield of W2 treatment was the highest, but there was no significant difference with W3 treatment.【Conclusion】 Higher seedling emergence water can significantly reduce the pH value and salt content of soil surface during seedling emergence, promote the growth of cotton plant and the effective accumulation of dry matter, which is conducive to the formation of yield components per plant.However, too much irrigation will affect the seedling emergence rate.The yield is higher when the seedling emergence water of drip irrigation is 300~450 m3/hm2. Table and Figures | Reference | Related Articles | Metrics | Comments（0）

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Xinjiang Agricultural Sciences    2023, 60 (7): 0-0.   Abstract （58）      PDF （34100KB）（102）       Knowledge map    Related Articles | Metrics | Comments（0）

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Xinjiang Agricultural Sciences    2022, 59 (8): 0-0.   Abstract （115）      PDF （15999KB）（101）       Knowledge map    Related Articles | Metrics | Comments（0）

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Identification and evaluation of salt tolerance of rice recombinant inbred lines at bud and seedling stages ZHANG Yanhong, HOU Tianyu, BA Yinhua, ZHAO Caiyue, LYU Yuping, Buhalikeimu Abunzi, ZHAO Zhiqiang, LI Dong, DU Xiaojing, YUAN Jie, WANG Fengbin Xinjiang Agricultural Sciences    2023, 60 (5): 1041-1049.   DOI: 10.6048/j.issn.1001-4330.2023.05.001 Abstract （125）   HTML （1）    PDF （1336KB）（98）       Knowledge map    【Objective】 Which seriously restricts the production and development of rice, so it is of great significance to identify the salt tolerance of rice germplasm resources at bud and seedling stages.The results have provided germplasm resources and reference for further digging salt-tolerant rice germplasm and breeding new varieties.【Methods】 A total of 219 stable recombinant inbred lines were used as experimental materials to identify and evaluate the salt tolerance of rice at bud stage and seedling stage using 1.2% NaCl solution and 0.7% NaCl solution, respectively.【Result】 The results showed that the germination potential and germination rate decreased significantly after the treatment with 1.2% NaCl, and 4 salt-tolerant materials and 6 sensitive materials were screened.The germination potential, germination rate, bud length and root length of salt-tolerant materials decreased slowly, while the germination potential, germination rate, bud length and root length of sensitive materials decreased significantly.After 0.7% NaCl treatment at seedling stage, the survival rate of population materials decreased significantly.The comparison of phenotypes between salt-tolerant materials and sensitive materials showed that the plant height and survival rate of salt-tolerant materials decreased but did not reach a significant level, while the plant height and survival rate of sensitive materials decreased significantly, and the inhibition degree of salt-tolerant materials was less than that of sensitive materials.【Conclusion】 The relative germination potential, relative germination rate and survival rate of 219 materials decreased significantly after salt stress at bud stage.The salinity tolerance of salt-tolerant materials is different from that of sensitive materials.The salinity stress of salt-tolerant materials is lower than that of sensitive materials.Eighteen materials with strong salt tolerance at budding stage are screened and seedlings of strong salt tolerance material 2 are also obtained. Table and Figures | Reference | Related Articles | Metrics | Comments（0）

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Xinjiang Agricultural Sciences    2023, 60 (9): 0-0.   Abstract （157）      PDF （13223KB）（96）       Knowledge map    Related Articles | Metrics | Comments（0）

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Study on the Supply of Nitrogen, Phosphorus and Potassium Nutrients of Arable Land in Xinjiang MA Weidong, CHEN Yinghua, WANG Fei, WEI Changzhou Xinjiang Agricultural Sciences    2022, 59 (6): 1401-1408.   DOI: 10.6048/j.issn.1001-4330.2022.06.011 Abstract （180）   HTML （14）    PDF （1148KB）（92）       Knowledge map    【Objective】 Through the study of soil nutrient supply in Xinjiang, this paper aims to further provide basic data for the evaluation of arable land quality.【Method】 This paper collected soil nutrient supply data documented literature from 2000 to 2019 in Xinjiang, combining data created “3414” plan by the National Soil Testing Fertilization Formula Action and “3 plots experiments”, to explore soil N, P, K supply capacity in Xinjiang.Soil nutrient supply capacity was calculated by blank treatment in “3414” plan or “3 plots experiments” because nutrient contained in crops was fully from soil in these treatments.Soil available N, P, K contents were also compared with results of the 2nd National Soil Survey.【Results】 (1) The average nitrogen (N) supply of soil at present stage was 199.50 kg/hm2, the average phosphorus (P2O5) supply was 90.33 kg/hm2, the average potassium (K2O) supply of soil was 204.34 kg/hm2, the dependence rates of crops on soil nitrogen, phosphorus and potassium were: 59.92%, 67.00%, 73.96%.In recent 20 years (2000-2019), soil nitrogen supply showed a trend of first decrease and then increase, soil phosphorus supply showed a progressively increasing trend.The potassium supply of soil showed an increasing- decreasing pattern.(2) Since the second soil census, the content of alkali-hydrolyzed nitrogen (except Tacheng Prefecture region and Ili Kazak Autonomous Prefecture) and rapidly-available phosphorus in soil have all increased and the content of available potassium in soil decreased.【Conclusion】 At present, the soil nitrogen supply in the three major areas of Xinjiang is the highest in east part, followed by northern part; The soil phosphorus supply is the highest in east part and the lowest in southern part; and the soil potassium supply is the highest in southern area and the lowest in eastern area.The contents of alkali-hydrolyzable nitrogen and available phosphorus in arable soil in Xinjiang are showing an increasing trend, while the content of soil available potassium decreased obviously.In order to obtain better economic benefits, environmentally friendly agriculture and the maximum efficiency of resource utilization. Table and Figures | Reference | Related Articles | Metrics | Comments（0）

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Effects of Different Topping Agents on Cotton Dry Matter, Yield and Quality ZHANG Fengjiao, WU Gang, QIN Wenbin, WANG Hui, LIU Chunyan, HE Liangrong Xinjiang Agricultural Sciences    2023, 60 (2): 279-285.   DOI: 10.6048/j.issn.1001-4330.2023.02.003 Abstract （858）   HTML （9）    PDF （668KB）（90）       Knowledge map    【Objective】 To improve the application effect of chemical topping agent,and to compare the application effect of flupentine and cuhuawang cotton topping agent in southern Xinjiang. 【Methods】 In 2020,three cotton varieties Xinluzhong 37,Xinluzhong 70 and Xinluzhong 82 were selected and treated with the other three treatments: artificial topping (CK),flupentine application and Cuhuawang application. Two factor split plot design was adopted.The main plot was treated with two topping agents (flupentine combined with mepiquat,Cuhuawang molding agent combined with topping agent) and artificial topping (CK),and the sub plot was treated with three cotton varieties with three repetitions. 【Result】 The proportion of reproductive organs in the main treatments on September 3 was the highest,and that in the treatment of promoting chemical king was the lowest;the proportion of distribution coefficient of vegetative organs in the main treatments on September 3 was the highest when spraying Cuhuawang,and the lowest when spraying fluthrin.Comparison among main treatments:the seed cotton yield of Xinluzhong 70 under Cuhuawang treatment was the highest than that of other varieties,and the other two varieties were the highest under fluthrin treatment;Xinluzhong 37 had the highest lint percentage under the treatment of fluthrin,the other two varieties had the highest lint percentage under the treatment of Cuhuawang,and the three varieties under the treatment of artificial topping had the lowest lint percentage.The results also showed that the average length and breaking strength of the upper part of cotton fiber were the best,while the micronaire value and elongation were the worst. 【Conclusion】 The proportion of reproductive organs under fluthrin treatments on September 3 was the highest and that in the treatment of promoting Cuhuawang was the lowest the proportion of vegetative organs was opposite to that of reproductive organs.The seed cotton yield of Xinluzhong 70 under Cuhuawang treatment was the highest than that of other varieties,and the other two varieties were the highest under fluthrin treatment;Xinluzhong 37 had the highest lint percentage under the treatment of fluthrin,the other two varieties had the highest lint percentage under the treatment of cuhuawang,and the three varieties under the treatment of artificial topping had the lowest lint percentage.While the micronaire value and elongation were the worst;The results showed that the length uniformity and yellowness of cotton fiber were the best,and the specific strength was the worst;under artificial topping treatment,the micronaire value and elongation of cotton fiber were the best,while the average length of upper part,length uniformity and yellowness were the worst. Table and Figures | Reference | Related Articles | Metrics | Comments（0）

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Effect of Oxygenated Water Input on Soil Nitrogen in Loam WANG Hongyan, FU Yanbo, WANG Zhiguo, BIAN Qingyong, FENG Yaozu, RAO Xiaojuan Xinjiang Agricultural Sciences    2022, 59 (11): 2601-2613.   DOI: 10.6048/j.issn.1001-4330.2022.11.001 Abstract （246）   HTML （75）    PDF （1700KB）（90）       Knowledge map    【Objective】 The effects of oxygenated water with different dissolved oxygen contents on mineralization and nitrification of irrigated loam soil were studied to provide reference for exploring the response of oxygenated water input to soil fertility.【Methods】 With loam as the test soil, the contents of {\mathrm{NH}}_{\mathrm{４}}^{＋}-N and {\mathrm{NO}}_{\mathrm{３}}^{-}-N in loam soil under different concentrations of oxygenated water input at different cultivation time were determined by using indoor soil culture test method, including conventional water (RCK), natural air oxygenated aeration (RD1), 33％ oxygenated aeration (RD2) and 90％ oxygenated aeration (RD3). The soil net nitrogen mineralization, net nitrogen mineralization rate, nitrification rate and nitrification rate were calculated, and the regression formula and model eigenvalue of soil {\mathrm{NH}}_{\mathrm{４}}^{＋}-N content and incubation time t under different treatment conditions were fitted, and then the input effects of different treatments were analyzed. 【Results】 Contrary to the change trend of the time used to reach the maximum consumption rate, the trend changes of the initial consumption rate V0 and the maximum consumption rate Vmax in the four different treatments were all RCK<RD1<RD2<RD3. The maximum value of the initial consumption rate V0 (8.950 1 mg／(kg・d)), the maximum value of the maximum consumption rate Vmax (13.019 8 mg／(kg・d)) and the minimum value of the time used to reach the maximum consumption rate TVmax (1.502 1 d) were all RD3 treatments. Under the same oxygen concentration, soil net nitrogen mineralization and nitrification rate increased with time, while soil net nitrogen mineralization rate and nitrification rate decreased with time. At the same incubation period, the variation trends of soil net nitrogen mineralization, net nitrogen mineralization rate, nitrification rate and net nitrification rate were all in the relationship of RCK<RD1<RD2<RD3.【Conclusion】 Increasing the oxygen concentration of input water can enhance soil mineralization and nitrification by accelerating soil nitrogen transformation, thereby improving soil microbial activity and mineral transformation, so as to improve soil nitrogen supply capacity. Table and Figures | Reference | Related Articles | Metrics | Comments（0）

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Effects of different delinting modes on seed vigor and seedling characteristics of cotton under PEG stress Mierzhati Mutalifu, SHI Xiunan, BO Junbing, Zubaidai Abudukerimu, Wulejialehasi Azhati, SHI Shubing Xinjiang Agricultural Sciences    2023, 60 (7): 1561-1568.   DOI: 10.6048/j.issn.1001-4330.2023.07.001 Abstract （1001）   HTML （31）    PDF （718KB）（90）       Knowledge map    【Objective】 To study the effects of different delinting modes on cotton seed vigor and seedling characteristics under PEG stress in the hope of providing theoretical support for producing cotton seeds with high vigor.【Methods】 Xinluzao 64 was used as the experimental material and three delinting treatments including T1 (sulfuric acid), T2 (laser) and T3 (laser) were set.Then standard germination test was carried out under four modes CK (0%), P5 (5%), P15 (15%) and P25 (25%) of PEG-8000 concentration.【Results】 With the increase of PEG-8000 concentration, the germination rate, germination potential, germination index, vigor index, dry weight of vegetative organs, plant length, contents of soluble sugar and peroxidase decreased at seedling stage.While the contents of malondialdehyde and proline significantly increased.Simultaneously, the average of stem diameter, volume and average diameter of root increased first and then decreased at seedling stage.Significant effects were found on cotton seed germination rate and germination potential under different delinting methods.Among them, germination rate, germination potential, root volume, average root diameter, the contents of proline and peroxidase showed T1 > T2 > T3 under three delinting methods.The germination index, vigor index, average stem diameter, root length and root surface area were performed as T1 > T3 > T2.The contents of soluble sugar and malondialdehyde indicated T3 > T2 > T1 among three delinting modes.【Conclusion】 Compared with delinting method of sulfuric acid depilation, the germination rate and germination potential of cotton seeds are reduced using laser depilation method, the seed vitality and drought resistance is improved. Table and Figures | Reference | Related Articles | Metrics | Comments（0）

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Xinjiang Agricultural Sciences    2023, 60 (5): 0-0.   Abstract （52）      PDF （13592KB）（89）       Knowledge map    Related Articles | Metrics | Comments（0）

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Isolation and Identification of Pathogen of Potato Scab and Its Growth Characteristics from Zepu Area in Xinjiang SONG Suqin, GAO Haifeng, LV Zhuo, TANG Qiyong, GU Meiying, ZHANG Zhidong, CHU Min, ZHU Jing, WANG Wei Xinjiang Agricultural Sciences    2022, 59 (8): 1999-2006.   DOI: 10.6048/j.issn.1001-4330.2022.08.021 Abstract （182）   HTML （9）    PDF （19984KB）（89）       Knowledge map    【Objective】 The purpose of this study is to determine the species and growth characteristics of potato scab pathogen in Aikule Township, Kashgar Prefecture, Xinjiang, for the potato scab disease affected the yield and quality of potato seriously, and caused great losses to potato industry, especially to virus-free seed potato in Xinjiang. 【Method】 The pathogen was isolated and identified by tissue separation method combined with Koch's rule, microscopic morphology and 16 S rDNA. Then different carbon sources and nitrogen sources were selected to test its growth characteristics. 【Result】 Based on its morphological characteristics and 16S rDNA sequence, the pathogen of this disease was identified as Streptomyces acidiscabies from this area, which produced white-smooth curved spores with melanin and soluble pigment. Eight kinds of the carbon sources and two kinds of nitrogen sources were tested its growth period, such as glucose, methionine（Met） and histidine（His） etc. It could produce reticulate netlike scab after inoculatedon healthy potato tubers by smearing the tuber skin with spores suspension. The optimum growth temperature was 30℃, the pH was 7, and the optimum carbon and nitrogen sources were glucose and methionine separately. 【Conclusion】 The pathogen of the potato scab are isolated and identified from this area, and its growth characteristics were proved in this study, which would be the beneficial research basis for controlling this disease in Xinjiang. Table and Figures | Reference | Related Articles | Metrics | Comments（0）