Effects of zinc fertilizer on soil nutrients in oasis cotton fields in Xinjiang

doi:10.6048/j.issn.1001-4330.2025.06.002

Abstract

Abstract:

【Objective】 To explore the effect of zinc fertilizer application through drip irrigation on soil nutrients in cotton field, and to provide theoretical basis for guiding the application of zinc fertilizer with water drip irrigation. 【Methods】 Through field plot experiment, different amounts of zinc fertilizer were applied with water drop during cotton growth period. They are 0 kg/hm² (CK), 7.5 kg/hm² (Zn1), 15 kg/hm² (Zn2), 22.5 kg/hm² (Zn3), 30 kg/hm² (Zn4), 37.5 kg/hm² (Zn5), 45 kg/hm² (Zn6), respectively. The change characteristics of main nutrient contents in soil of 0-20 cm and 20- 40 cm under different application rates of zinc fertilizer were studied. 【Results】 With the increase of zinc fertilizer application amount, the available zinc content in 0-20 cm soil layer showed a gradual increase trend, and showed a fluctuation in 20-40 cm soil layer. Compared with no application of zinc fertilizer, the application of zinc fertilizer decreased the soil pH of 0-20 cm and 20-40 cm cotton field, and increased the contents of alkali-hydrolyzed nitrogen and available phosphorus. The contents of alkali-hydrolyzed nitrogen and available phosphorus were the highest under Zn3 treatment, which were 84.16 and 84.68 g/kg, 31.93 and 30.40 g/kg, respectively. The contents of available potassium and iron in 0-20 cm and 20-40 cm cotton soil increased first and then decreased with the increase of zinc fertilizer application, and the highest contents were 548.33 and 552.00 g/kg, 10.35 and 10.55 mg/kg under Zn4 treatment. The available manganese and exchangeable magnesium in 0-20 cm and 20-40 cm cotton soil increased gradually with the increase of zinc fertilizer application, and the highest contents were 5.0 and 5.0 mg/kg, 4.48 and 4.48mg/kg under Zn6 treatment, respectively. To sum up, in the experiment of different zinc fertilizer dosage, soil pH value decreased when the drop application of zinc sulfate was 22.5-30.0 kg/hm², and the contents of alkali-hydrolytic nitrogen, available phosphorus, available potassium, available zinc and available iron were all at a high value, while the contents of available manganese and exchangeable magnesium were the highest when the drop application of zinc was 45 kg/hm². 【Conclusion】 Zinc fertilizer had a positive effect on soil fertility of irrigated grey desert soil in Xinjiang oasis.

Key words: zinc fertilizer; application through drip irrigation; cotton; soil nutrients; trace element

摘要：

【目的】研究随水滴施锌肥对棉田土壤养分的影响,为指导锌肥随水滴灌施用提供理论依据。【方法】设置田间小区试验,在棉花生育期设置随水滴施不同用量锌肥处理,分别为0 kg/hm²(CK)、7.5 kg/hm²(Zn1)、15 kg/hm²(Zn2)、22.5 kg/hm²(Zn3)、30 kg/hm²(Zn4)、37.5 kg/hm²(Zn5)、45 kg/hm²(Zn6),分析不同锌肥滴施用量条件0~20 cm和20~40 cm土壤中主要养分含量的变化特征。【结果】随着锌肥施用量的增加,0~20 cm土层有效锌含量呈逐渐增加趋势,20~40 cm土层呈波动变化;同不施锌肥相比,锌肥施用降低了0~20 cm和20~40 cm棉田土壤pH值,并提高碱解氮、有效磷含量,其中碱解氮、有效磷含量均在Zn3处理时含量最高,分别为84.16和84.68 g/kg、31.93和30.40 g/kg;0~20 cm和20~40 cm棉田土壤速效钾、有效铁含量随着锌肥施用量的增加呈先增加后降低的趋势,并且均在Zn4处理时含量最高,为548.33和552.00 g/kg、10.35和10.55 mg/kg;0~20 cm和20~40 cm棉田土壤有效锰和交换性镁随着锌肥施用量的增加呈逐渐增加的趋势,并且均在Zn6处理时含量最高,分别为5.0和5.0 mg/kg、4.48和4.48 mg/kg。【结论】不同锌肥用量试验,当硫酸锌滴施量为22.5~30.0 kg/hm²时,土壤pH值下降,碱解氮、有效磷、速效钾、有效锌、有效铁含量均处于较高值,有效锰、交换性镁则在锌滴施量为45 kg/hm²时,含量最高,滴施锌肥对提升新疆绿洲棉田灌耕灰漠土的土壤肥力有正向的作用。

关键词: 锌肥, 随水滴施, 棉花, 土壤养分, 微量元素

CLC Number:

S153

LI Quan sheng, GAO Zhi jian, YU Hang, WANG Guo dong, LIU Yu. Effects of zinc fertilizer on soil nutrients in oasis cotton fields in Xinjiang[J]. Xinjiang Agricultural Sciences, 2025, 62(6): 1308-1317.

李全胜, 高志建, 于航, 王国栋, 刘瑜. 锌肥随水滴施对新疆绿洲棉田土壤养分的影响[J]. 新疆农业科学, 2025, 62(6): 1308-1317.

Figures/Tables 11

Tab.1 Application amount and time of zinc fertilizer in experimental plot

处理 Treatments	硫酸锌Zinc sulfate(kg/hm²)			共计 (kg/hm²)
处理 Treatments	6月8日	6月27日	7月10日	共计 (kg/hm²)
CK	0.0	0.0	0.0	0.0
Zn1	1.5	3.0	3.0	7.5
Zn2	3.0	6.0	6.0	15.0
Zn3	4.5	9.0	9.0	22.5
Zn4	6.0	12.0	12.0	30.0
Zn5	7.5	15.0	15.0	37.5
Zn6	9.0	18.0	18.0	45.0

Fig.1 Changes of different zinc application amounts on pH value Notes: Columns with different letters above them in different soil layer indicate significant different at 0. 05 leves,the same as below

Fig.2 Changes of different zinc application amounts on EC value

Fig.3 Changes of different zinc application amounts on alkaline nitrogen

Fig.4 Changes of different zinc application amounts on alkaline phosphorus

Fig.5 Chanes of different zinc application amounts on alkaline potassium

Fig.6 Changes of different zinc application amounts on alkaline zinc

Fig.7 Changes of different zinc application amounts on alkaline iron

Fig.8 Changes of different zinc application amounts on alkaline manganese

Fig.9 Changes of different zinc application amounts on exchangeable magnesium

Fig.10 Correlation between zinc fertilizer application rate and physicochemical properties of cotton field soil Notes:Ainc application amounts (ZMT)、alkaline nitrogen (AN)、alkaline phosphorus (AP)、alkaline potassium (AK)、EC电导率、alkaline zinc (AZ)、alkaline iron (AF)、alkaline manganese (AM)、exchangeable magnesium (EM), *, ** and *** indicated that the correlation significance level was 0.05, 0.01 and 0.001, respectively

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