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提高棉花的产量和用水效率,用于地下滴水灌,而无需覆盖棉花

Nan-Nan Li¹, Jun-Hong Li², Xiao-Juan Shi¹

¹Key Laboratory of Oasis Eco-Agriculture, Xinjiang Production and Construction Group, Shihezi University, Shihezi, Xinjiang, China.

Frontiers in plant science

|August 9, 2024

概括

在干旱地区,在夜间进行地下灌,而无需铺,可以提高棉花产量和用水效率 (WUE). 最佳的灌水平 (3201-3477 m3 ha−1) 改善了土壤条件和植物生理学,减少了塑料薄膜污染.

科学领域:

农业科学农业科学
农业学是一种农业学.
环境科学环境科学

背景情况:

在干旱地区的棉花田中,塑料薄膜覆造成污染,并降低了用水效率 (WUE).
地下滴灌和夜间灌提供了潜在的解决方案,以改善水热环境和WUE,而无需覆盖.

研究的目的:

评估通过地下夜间灌减少灌量对干旱地区棉花生长和WUE的影响.
为了确定最佳的灌水平,平衡土壤水分,叶子温度和作物生产率,而无需覆盖土壤.

主要方法:

一个为期两年的实地实验 (2019-2020),使用地下滴水灌进行了五次灌处理 (I1-I5).
评估土壤体积含水量,土壤温度,叶子相对含水量 (RWC),气交换参数,毛毛产量和WUE.

主要成果:

减少灌增加了土壤温度和叶子温度,但降低了叶子RWC,净光合作用率 (Pn) 和透气率 (Tr).
优化灌 (3201-3477 m3 ha-1) 与较高的灌水平相比,显著增加了丝产量 (2.8-12.2%) 和WUE.
在特定的白天时间 (10:00-16:00) 中,在叶子的热水环境,PN,土壤温度和WUE之间发现了积极的相关性.

结论:

地下夜间灌,不用覆,最佳的用水量为3201-3477 m3 ha-1,可以在干旱的环境中提高棉花毛产量和WUE.
这种方法减轻了塑料薄膜污染的负面影响,同时改善了土壤和叶子的热水条件,以提高作物表现.

关键词:

光合作用光合作用.土壤热水环境热水环境地下滴滴灌灌方式使用水的效率提高了水的使用效率.没有覆的模型模型.

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