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- Title
水氮运筹对小麦、玉米周年产量及 水分利用的影响.
- Authors
杨永辉; 武继承; 徐为霞; 潘晓莹; 张洁梅; 高翠民; 何 方; 王 越
- Abstract
A field experiment was conducted to investigate the effects of N fertilizer topdressing ratio (A1:30%,A2:40%;240 kg/ ha N for wheat,270 kg/ ha N for maize) combined with three irrigation rates [B1—B3:0,2,3 times during the growth stage of wheat and maize respectively;450 m3 / (ha•time) for wheat and maize] on soil water storage,photosynthetic physiological characteristics,annual yield and water use under irrigation with sprinkler belt,so as to determine reasonable N fertilizer topdressing ratio and irrigation amount for wheat and maize. The results showed that with the increase of irrigation rate,the soil water storage increased at heading stage and filling stage of wheat,filling stage and harvest stage of maize, while the soil water storage showed a decreasing trend at the harvest stage of wheat. More nitrogen fertilizer supply in the early stage of wheat was more beneficial to improve the photosynthetic rate,while moderate drought stress was more beneficial to improve leaf water use efficiency. With the increase of irrigation rate,the yield and water use efficiency of wheat increased at first and then decreased,while the biomass and 1 000-grain weight increased. A1B2 treatment had the highest wheat grain yield of 8 207. 8 kg/ ha, water use efficiency of 26. 7 kg/ (mm•ha) and irrigation use efficiency of 1. 42 kg/ m3 . For maize,A2B2 treatment had the highest yield,while the water use efficiency and irrigation use efficiency of A1B3 treatment were the highest. The order of annual water consumption of wheat and maize was A1<A2. The annual yield of wheat and maize of A2B2 treatment was the highest,while the annual water use efficiency and irrigation use efficiency of A1B3 treatment were all the highest.
- Subjects
WATER efficiency; IRRIGATION efficiency; NITROGEN fertilizers; WATER storage; WATER use; WATER consumption; FERTILIZERS; SPRINKLER irrigation
- Publication
Journal of Henan Agricultural Sciences, 2019, Vol 48, Issue 12, p8
- ISSN
1004-3268
- Publication type
Article
- DOI
10.15933/j.cnki.1004-3268.2019.12.002