新疆农业科学 ›› 2024, Vol. 61 ›› Issue (9): 2330-2340.DOI: 10.6048/j.issn.1001-4330.2024.09.030

• 植物保护·微生物·畜牧兽医·土壤肥料 • 上一篇    

氮肥对头状沙拐枣幼苗抗旱性的影响

李金瑶1(), 徐贵青2(), 王立生3, 吕平3, 石东方4, 郑伟华5   

  1. 1.新疆农业大学林学与风景园林学院,乌鲁木齐 830052
    2.中国科学院阜康荒漠生态实验站,新疆阜康 831505
    3.新疆生产建设兵团林业和草原工作总站,乌鲁木齐 830013
    4.新疆瑞绎昕生态园林技术有限公司,乌鲁木齐 830000
    5.新疆农业科学院农业质量标准与检测技术研究所,乌鲁木齐 830002
  • 收稿日期:2024-02-15 出版日期:2024-09-20 发布日期:2024-10-09
  • 通信作者: 徐贵青(1976-),男,新疆人,副研究员,博士,硕士生导师,研究方向干旱区植物生理生态学,(E-mail)xugq@ms.xjb.ac.cn
  • 作者简介:李金瑶(1998-),女,河南人,在读硕士研究生,研究方向植物生理学。(E-mail)865268214@qq.com
  • 基金资助:
    新疆生产建设兵团林业和草原工作总站委托项目“准噶尔盆地南缘兵团受损生态公益林免灌植被恢复成效评价”(E140020901);国家自然科学基金项目“绿洲荒漠过渡带典型灌丛的地下水依赖性及其存续前景”,“绿洲化过程中土壤水稳性大团聚体的累积与其驱动机制研究”(32171874);国家自然科学基金项目“绿洲荒漠过渡带典型灌丛的地下水依赖性及其存续前景”,“绿洲化过程中土壤水稳性大团聚体的累积与其驱动机制研究”(42271068)

Study on the effect of N fertilization on drought resistance of Calligonum caput-medusae seedlings

LI Jinyao1(), XU Guiqing2(), WANG Lisheng3, LU Ping3, SHI Dongfang4, ZHENG Weihua5   

  1. 1. College of Forestry and Landscape Architecture, Xinjiang Agricultural University, Urumqi 830052, China
    2. Fukang Desert Ecological Experimental Station, Chinese Academy of Sciences, Fukang Xinjiang 831505, China
    3. General Work Station of Forestry and Grassland, XPCC, Urumqi 830013, China
    4. Xinjiang Ruiyixin Ecological Garden Technology Co., Ltd., Urumqi 830000, China
    5. Institute of Agricultural Quality Standards and Testing Technology, Xinjiang Academy of Agricultural Sciences, Urumqi 830002, China
  • Received:2024-02-15 Published:2024-09-20 Online:2024-10-09
  • Supported by:
    Commissioned Project of Forestry and Grassland Work Station of Xinjiang Production and Construction Corps "Evaluation of No-Irrigation Vegetation Restoration Effectiveness of Damaged Ecological Public Welfare Forests in the Southern Margin of Junggar Basin"(E140020901);"Groundwater Dependence and Future Prospects of Typical Scrub in Oasis Desert Transition Zone "and" Accumulation of Large Aggregates of Soil Water Stability and Its Driving Mechanism during Oasisization"(32171874);"Groundwater Dependence and Future Prospects of Typical Scrub in Oasis Desert Transition Zone "and" Accumulation of Large Aggregates of Soil Water Stability and Its Driving Mechanism during Oasisization"(42271068)

摘要:

【目的】探索施用氮肥对提高植物抗旱性的影响。【方法】以干旱区重要造林树种头状沙拐枣(Calligonum caput-medusae)幼苗为研究对象,采用盆栽试验,设置两组水分处理(亏缺供水和正常供水)和两组氮肥处理(未施氮和施氮),测定幼苗同化枝的生理生化指标。【结果】(1)同正常供水相比,亏缺供水下的幼苗同化枝相对含水量(RWC)、正午同化枝水势(Ψm)、最大气孔导度(gs)、叶绿素含量(Chl)、表观量子效率(Φ)和可溶性糖(SS)含量显著降低;而脯氨酸(Pro)含量显著增加;(2)同未施氮组相比,施氮减缓了亏缺供水和正常供水下头状沙拐枣幼苗同化枝相对含水量的下降,但不显著;同正常供水比,亏缺供水下施氮降低了头状沙拐枣幼苗的同化枝水势;(3)正常供水下,施氮提高了幼苗Pro、SS含量,而丙二醛(MDA)含量显著降低(P<0.05);亏缺供水下,施氮提高了超氧化物歧化酶(SOD)含量、Pro含量和SS含量(P<0.05),而MDA含量显著降低(P<0.05)。【结论】沙拐枣幼苗生理活性受土壤水分有效性的影响,而施氮有助于降低干旱胁迫造成的影响。施氮提高了亏缺供水和正常供水下头状沙拐枣幼苗的抗氧化酶活性和细胞溶质浓度,有助于头状沙拐枣幼苗降低氧化应激反应并减少损伤,增加渗透调节物质。

关键词: 头状沙拐枣; 施氮; 抗旱性; 生理生化

Abstract:

【Objective】 An important afforestation tree in arid region. 【Methods】 To explore the effects of nitrogen fertilizer on drought resistance of Calligonum caput-medusae Schrenk seedlings, Two groups of water treatments (deficit water supply and normal water supply) and two groups of nitrogen treatments (no nitrogen application and nitrogen application) were set up in pot experiment to determine the physiological and biochemical indexes of assimilated branches of seedlings. 【Results】 (1) Compared with normal water supply, the relative water content (RWC), midday water potential (Ψm), maximum stomatal conductance (gs), chlorophyll content (Chl), apparent quantum efficiency (Φ) and soluble sugar (SS) contents of assimilated branches were significantly decreased under deficit water supply. The content of proline (Pro) increased significantly. (2) Compared with no N application group, N application slowed down the relative water content of the assimilated branches of A. capulosa seedlings under deficit and normal water supply, but it was not significant; Compared with normal water supply, nitrogen application under deficit water supply reduced the assimilative branch water potential of A. capillata seedlings. (3) Under normal water supply, the contents of Pro and SS were increased by nitrogen application, while the contents of malondialdehyde (MDA) were significantly decreased (P<0.05). Under deficient water supply, nitrogen application increased the content of superoxide dismutase (SOD), Pro and SS (P<0.05), but significantly decreased the content of MDA (P<0.05). 【Conclusion】 The physiological activity of Jujube japonica seedlings is affected by the availability of soil water, and nitrogen application can reduce the effect of drought stress on them. Nitrogen application increases the activity of antioxidant enzymes and the concentration of cytosoles in the deficient and normal water supply, and helps the seedlings to overcome oxidative stress, reduce damage and increase osmoregulatory substances.

Key words: Calligonum caput-medusae; fertilization; drought resistance; physiology and biochemistry

中图分类号: 


ISSN 1001-4330 CN 65-1097/S
邮发代号:58-18
国外代号:BM3342
主管:新疆农业科学院
主办:新疆农业科学院 新疆农业大学 新疆农学会

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