Study on the Grain Filling Characteristics and Optimal Water and Nitrogen Coupling of Sprinkler-irrigated Winter Wheat in the Southern Regions of Huang Huai Plain

LIU Jian; NING Dongfeng; QIN Anzhen; ZHANG Jiyang; LIU Zhandong; SUN Bin; DING Pengfei; LI Fei; SHEN Hongli; ZHAO Dongsheng

doi:10.13870/j.cnki.stbcxb.2021.01.035

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Study on the Grain Filling Characteristics and Optimal Water and Nitrogen Coupling of Sprinkler-irrigated Winter Wheat in the Southern Regions of Huang Huai Plain

更新时间：2025-03-12

- Study on the Grain Filling Characteristics and Optimal Water and Nitrogen Coupling of Sprinkler-irrigated Winter Wheat in the Southern Regions of Huang Huai Plain
- Vol. 35, Issue 1, Pages: 244-250(2021)
- 作者机构：
  
  1. 中国农业科学院农田灌溉研究所, 农业农村部作物需水与调控重点实验室,河南,新乡,453002
  2. 许昌市农田水利技术试验推广站,河南,许昌,461000
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2021.01.035
  CLC： S513;S274.1
- Published：2021
- 稿件说明：
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LIU Jian, NING Dongfeng, QIN Anzhen, et al. Study on the Grain Filling Characteristics and Optimal Water and Nitrogen Coupling of Sprinkler-irrigated Winter Wheat in the Southern Regions of Huang Huai Plain[J]. 2021, 35(1): 244-250.
DOI：

LIU Jian, NING Dongfeng, QIN Anzhen, et al. Study on the Grain Filling Characteristics and Optimal Water and Nitrogen Coupling of Sprinkler-irrigated Winter Wheat in the Southern Regions of Huang Huai Plain[J]. 2021, 35(1): 244-250. DOI： 10.13870/j.cnki.stbcxb.2021.01.035.

摘要

为了优化冬小麦水氮配置，实现养分水分资源高效利用，试验设计3个灌水水平（低灌水W1：25 mm；中灌水W2：40 mm；高灌水W3：55 mm）和5个氮肥水平（N0：0；N1：80 kg/hm2；N2：180 kg/hm2；N3：240 kg/hm2；N4：300 kg/hm2），共计15个处理，探究了喷灌条件下灌水、施氮及其互作对籽粒灌浆特性及水氮利用效率的影响，并通过建模求解最优水氮配置。结果表明：施氮对te（灌浆持续时间）和tm（最大灌浆速率出现时间）影响显著，两者均随施氮量的增加表现为先增加后降低。N3施氮水平下te和tm最大，均值分别为43.9，24.6天，比N0（不施氮）分别增加1.7，3.0天。W2N3处理的tm值最大，比最小处理W1N0延后5.0天。GFmax（最大灌浆速率）与AG（平均灌浆速率）呈极显著相关（r=0.841**），千粒重与产量（r=0.791**）、te（r=0.755**）和tm（r=0.717**）呈极显著正相关。W2N3组合产量和WUE（水分利用效率）均为最大，分别为8 960 kg/hm2和2.83 kg/m3。水氮耦合通过优化灌浆过程可有效提高冬小麦产量。喷灌灌水定额26~35 mm、施氮量193~204 kg/hm2（基施40%+拔节期追施60%）的水氮资源配置模式可实现节水增产双效目标。

Abstract

This study was aimed to explore the optimal water and nitrogen allocation of winter wheat and achieve the efficient utilization of nutrient and water resources. Three irrigation supply levels (low

25 mm

W1; moderate

40 mm

W2; high

55 mm

W3) and five nitrogen supply levels (N0

0 kg/hm2; N1

80 kg/hm2; N2

180 kg/hm2

240 kg/hm2

300 kg/hm2) were designed to optimize the crop irrigation and fertilization. There were 15 treatments in total. The effects of irrigation

nitrogen application and their interaction on the grain filling characteristics and water and nitrogen use efficiency were explored

meanwhile

optimal water and nitrogen supply rates were solved by modeling.The results showed that te (grain-filling lasting time) and tm (the time when maximum filling rate occurred) were affected by fertilization significantly

both of which increased first and then decreased as nitrogen application rates increased. te and tm at N3 level were the largest

with an average of 43.9 and 24.6 days

which were 1.7 and 3.0 days longer than that of N0. The largest tm value was obtained at W2N3 treatment

which happened 5.0 days later than W1N0 did. GFmax (maximum grain filling rate) and AG (average grain filling rate) exerted extremely significant correlation (r=0.841**)

1000-kernel weight was extremely positive correlated with yield (r=0.791**)

te (r=0.755**) and tm (r=0.717**). The highest grain yield and water use efficiency were obtained at W2N3 treatment with the maximum of 8 960 kg/hm2 and 2.83 kg/m3. Water and nitrogen coupling efficiently improved yield of winter wheat by optimizing grain filling process. Optimal irrigation quota of sprinkler was 26~35 mm

nitrogen application rate was 193~204 kg/hm2 (basal application 40% and topdressing 60% at jointing stage) achieved the goals of water-saving and yield-increasing.

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