Water and Nitrogen Inputs Optimization Based on Different Soil Water Storage at Planting

被引：0

作者：

Xu W. ^{[1
,2
]}

Yang B. ^{[1
,2
]}

Ding R. ^{[1
,2
]}

Nie J. ^{[1
,2
]}

Han Q. ^{[1
,2
]}

Jia Z. ^{[1
,2
]}

机构：

[1] Institute of Water-saving Agriculture in Arid Areas of China, Northwest A&F University, Yangling

[2] Key Laboratory of Crop Physi-ecology and Tillage Science in Northwest Loess Plateau, Ministry of Agriculture and Rural Affairs, Yangling

来源：

Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery | 2021年 / 52卷 / 10期

关键词：

Nitrogen rates; Soil water storage at planting; Spatial analysis; Supplemental water; Winter wheat (Triticum aestivum L.);

D O I：

10.6041/j.issn.1000-1298.2021.10.034

中图分类号：

学科分类号：

摘要：

In order to explore the nitrogen rate and water management, the multivariate regression analysis was applied to explore how levels of available soil water storage at planting (WB), supplemental water during the growing period (R) and nitrogen rate (N) affected yields of winter wheat (Triticum aestivum L.) and water use efficiency (WUE) in a mobile rain-proof shed between 2013 and 2015. The results showed that effects of all factors on yields of winter wheat followed the sequence of WB, N and R. Likewise, effects of all factors on WUE followed the sequence of WB, R and N. The coupling of all factors on yield and WUE had significant negative and positive effects, respectively; in adequate WB, nitrogen rate could fully exploit the role of WB on yield-increasing, and improve WUE. Acceptable yield and WUE were defined as greater than or equal to 0.95 of the maximum predicted response within the range of the treatments. Overlap of acceptable zones of grain yields and WUE were respectively 90~100 mm and 104.5~224.5 kg/hm2(WB=450 mm), 94.3~100 mm and 105.8~186.4 kg/hm2(WB=350 mm). At WB=650 mm, overlap of acceptable zone of the maximum grain yield and the high WUE was 71~100 mm and 141.2~264.8 kg/hm2. © 2021, Chinese Society of Agricultural Machinery. All right reserved.

引用

页码：327 / 336and368

共 39 条

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