Climatic Conditions Varied by Planting Date Affects Maize Yield in Central China

文献类型： 外文期刊

第一作者： Ge, Junzhu

作者： Ge, Junzhu;Xu, Ying;Zhong, Xinyue;Li, Shuya;Tian, Shaoyang;Yuan, Guoyin;Cao, Cougui;Zhan, Ming;Ge, Junzhu;Zhao, Ming;Ge, Junzhu

作者机构：

期刊名称：AGRONOMY JOURNAL （ 影响因子：2.24； 五年影响因子：2.829 ）

ISSN： 0002-1962

年卷期： 2016 年 108 卷 3 期

页码：

收录情况： SCI

摘要： Climatic factors have substantial effects on maize (Zea mays L.) grain yield (GY). This study was conducted to distinguish the effects and identify the optimal climatic factors for dry matter (DM) accumulation and GY. Three seasons, that is, spring maize (SpM), summer maize (SuM), and autumn maize (AuM) were divided in central China by a 2-yr field experiment. Spring maize grown under lower mean temperature (MT) with higher precipitation (Pr) before silking, however, high temperature stress (killing degree days [KDD]) were easily encountered aft er silking. Summer maize encountered higher MT and KDD, and less Pr through whole growth period. Climatic conditions of AuM were contrary to SpM. The KDD played a negative role on GY due to the negative affect of DM, ear kernels number (EKN), kernel weight (KW). Grain yield had positive relationships with Pr (180-400 mm), which played positive affect EKN and KW. Accumulated solar radiation (Ra) had compensating effects on EKN and KW, so it did not affect GY. The optimum MT for EKN was 20 to 27 degrees C and Pr was 179 to 302 mm before silking, while those for KW were 23 to 27 degrees C and 152 to 216 mm, respectively, aft er pollination. Spring maize grown under optimal climatic conditions as less KDD (-16.2 to -70.4%) and more Pr (+26.0 to +28.6%) outyielded SuM and AuM (+23.1 to +23.6%) by the notably higher DM, EKN, and KW. Temperature significantly affected maize DM, EKN, KW, and, ultimately GY, with SpM outyielding SuM and AuM in central China.

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