Mitigating heat and chilling stress by adjusting the sowing date of maize in the North China Plain

文献类型： 外文期刊

第一作者： Tian, Beijing

作者： Tian, Beijing;Zhu, Jincheng;Nie, Yanshun;Xu, Cailong;Meng, Qingfeng;Wang, Pu;Xu, Cailong

作者机构：

关键词： agronomy adaptation; chilling stress; extreme heat; high grain yield

期刊名称：JOURNAL OF AGRONOMY AND CROP SCIENCE （ 影响因子：3.473； 五年影响因子：4.395 ）

ISSN： 0931-2250

年卷期： 2019 年 205 卷 1 期

页码：

收录情况： SCI

摘要： The North China Plain (NCP) is one of the major areas of cereal production, and in recent years its maize (Zea mays L.) production has been influenced by both heat and chilling stresses. Adjusting the sowing date is an effective measure for mitigating these stresses. However, the underlying mechanisms remain poorly understood. We performed a 5-year field experiment to determine how the sowing date mitigated heat and chilling stresses at Wuqiao Experimental Station in the NCP with three treatments: early sowing (ES), middle sowing (MS), and late sowing (LS). In all 5 years, higher grain yields were observed in the MS (averaged 11.7 Mg/ha) and LS (averaged 11.4Mg/ha) treatments compared with the ES (averaged 10.9Mg/ha) treatment. The lower yield in ES treatment mainly resulted from high temperature 5 days pre-silking and 5 days post-silking (>31.8 degrees C). In 2015 and 2016, the lower grain yield in LS (11.4Mg/ha in 2015 and 11.2Mg/ha in 2016) treatment compared with MS (12.1Mg/ha in 2015 and 11.9Mg/ha in 2016) was mainly because the minimum temperature was <13.0 degrees C 5 days before maturity or <13.6 degrees C 10 days before maturity. Long-term weather data further verified middle sowing would be appropriate in a changing climate. Therefore, we can conclude that sowing date manipulation constitutes a useful method for mitigating heat and chilling stresses for maize production.

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