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Booting stage is the key timing for split nitrogen application in improving grain yield and quality of wheat - A global meta-analysis

文献类型： 外文期刊

作者： Wu, Wei 1 ; Wang, Yang 1 ; Wang, Li 2 ; Xu, Huasen 1 ; Zorb, Christian 3 ; Geilfus, Christoph-Martin 4 ; Xue, Cheng 1 ; Sun, Zhimei 1 ; Ma, Wenqi 1 ;

作者机构： 1.Hebei Agr Univ, Coll Resources & Environm Sci, State Key Lab North China Crop Improvement & Regul, Key Lab Farmland Ecoenvironm Hebei, Baoding 071001, Peoples R China

2.Shandong Acad Agr Sci, Inst Agr Resources & Environm, Inst Modern Agr Yellow River Delta, Jinan 250100, Peoples R China

3.Univ Hohenheim, Inst Crop Sci, Qual Plant Prod, D-70599 Stuttgart, Germany

4.Hsch Geisenheim Univ, Dept Soil Sci & Plant Nutr, D-65366 Geisenheim, Germany

关键词： Wheat; Split N application; Quality; Yield; Protein

期刊名称：FIELD CROPS RESEARCH （ 影响因子：6.145； 五年影响因子：7.234 ）

ISSN： 0378-4290

年卷期： 2022 年 287 卷

页码：

收录情况： SCI

摘要： Wheat is one of the most important staple crops and is mainly consumed as baked goods. Late nitrogen (N) application following a previous basic fertilization is commonly conducted to increase grain protein concentration and to improve the bread-making quality of wheat. However, the effect of late N application on the yield and quality of wheat highly varied among studies and, therefore, was questioned recently. This global meta -analysis, based on reported field experiments, aimed to clarify whether, and if so under what conditions, a late N (split from the overall N fertilization rate) application that follows an earlier N application is effective in high-protein bread-wheat production. The results showed that split N application enhanced the grain protein concentration by 5.8 %, wet gluten content by 7.9 %, and dough stability time by 10.8 %, while it decreased the grain yield of wheat by 3.5 % compared to that without split N application. However, the results varied, depending on the N application methods and environmental factors. At the fertilization level of 151-200 kg N/ha which is generally recognized as the rational N recommendation rate, split N application could increase the grain protein concentration by 6.9 %, stability time by 14.0 % and wet gluten content by 7.7 % without reducing the grain yield of wheat. More importantly, both the grain yield and quality of wheat were enhanced by split N application only when late N was applied at the booting stage. Moreover, the widely observed negative correlation between grain yield and grain protein concentration was weakened by split N application at the booting stage.

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