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Effect of Climatic Conditions Caused by Seasons on Maize Yield, Kernel Filling and Weight in Central China

文献类型： 外文期刊

作者： Ge, Junzhu 1 ; Xu, Ying 3 ; Zhao, Ming 2 ; Zhan, Ming 3 ; Cao, Cougui 3 ; Chen, Chuanyong 5 ; Zhou, Baoyuan 2 ;

作者机构： 1.Tianjin Agr Univ, Coll Agron Resources & Environm, Tianjin 300392, Peoples R China

2.Chinese Acad Agr Sci, Inst Crop Sci, Minist Agr & Rural Affairs, Key Lab Crop Physiol & Ecol, Beijing 100081, Peoples R China

3.Huazhong Agr Univ, Coll Plant Sci & Technol, MOA Key Lab Crop Physiol Ecol & Cultivat Middle R, Wuhan 430070, Peoples R China

4.Hunan Agr Univ, Coll Agron, Changsha 410128, Peoples R China

5.Beijing Acad Agr & Forestry Sci, Maize Res Ctr, Beijing 100097, Peoples R China

关键词： maize; different seasons; climatic conditions; grain yield; kernel weight; kernel filling parameters

期刊名称：AGRONOMY-BASEL （ 影响因子：3.949； 五年影响因子：4.117 ）

ISSN：

年卷期： 2022 年 12 卷 8 期

页码：

收录情况： SCI

摘要： In order to evaluate the effects of climatic conditions on maize grain yield (GY), kernel weight (KW), and kernel filling and identify the optimal climatic factors for GY and KW, 2-year field experiments in three seasons, i.e., spring (SPM), summer (SUM), and autumn (A(U)M), on maize were conducted in Central China. The results showed that SUM had more growing degree days (GDDs) than SPM and A(U)M due to the higher mean temperature (MT), and also resulted in higher temperature stress (killing degree days (KDDs)) in maize growth duration. Meanwhile, after silking, SPM and SUM had more GDDs and KDDs than A(U)M because of the higher MT, and the accumulated solar radiation (Ra) for SUM was significantly higher than for SPM and A(U)M. The GY of SPM was significantly higher than that of SUM and A(U)M, while SUM's GY was always the lowest, because the GDD GD, MT GD, and KDD GD played significantly negative roles on GY. The final KW for SUM was always the lowest, with GDD, MT, KDD, and Ra causing significantly negative effects, and M Delta T and precipitation having significant positive effects, resulting in a lower kernel filling rate during the linear kernel filling period (KFRlkf) and a lower GDD at the maximum kernel filling rate (GDD(KFRmax)). Maize KFRlkf has significant negative linear dependences on GDD, MT, and Ra. In summary, because of the higher MT, KDD, and GDD during maize growth and kernel filling duration negatively affecting the maize kernel filling rate, the GY and KW for SPM were the highest, and for SUM, they were the lowest; therefore, farmers should plant SPM first and then A(U)M in Central China.

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