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Impact of increased temperature on spring wheat yield in northern China

文献类型： 外文期刊

作者： Ye, Jun 1 ; Gao, Zhen 1 ; Wu, Xiaohua 2 ; Lu, Zhanyuan 1 ; Li, Cundong 1 ; Wang, Xiaobing 2 ; Chen, Liyu 2 ; Cui, Guohui; 1 ;

作者机构： 1.Hebei Agr Univ, Coll Agron, State Key Lab North China Crop Improvement & Regu, Key Lab Crop Growth Regulat Hebei Prov, Baoding, Peoples R China

2.Inner Mongolia Acad Agr & Anim Husb Sci, Inner Mongolia Conservat Tillage Engn Technol Res, Inner Mongolia Key Lab Degradat Farmland Ecol Res, Hohhot, Peoples R China

3.Univ Western Australia, UWA Sch Agr & Environm, Perth, WA, Australia

4.Univ Western Australia, UWA Inst Agr, Perth, WA, Australia

5.Ordos Acad Agr & Anim Husb Sci, Ordos, Peoples R China

关键词： grain yield; high temperature; specific growing stage; spring wheat

期刊名称：FOOD AND ENERGY SECURITY （ 影响因子：5.212； 五年影响因子：6.083 ）

ISSN： 2048-3694

年卷期： 2021 年 10 卷 2 期

页码：

收录情况： SCI

摘要： Global warming has been reported to cause reductions in crop yields. However, it was suggested that warming temperature might benefit crop productivity in some cool areas at high latitude. In this study, we conducted a 17-year field experiment (2002-2018) on spring wheat in Inner Mongolia. Temperature changes during each growth stage of spring wheat were investigated. Responses of spring wheat yield to temperature changes during the specific growing stages were evaluated. Average annual maximum temperature (T-max) and minimum temperature (T-min) significantly increased over the past 17 years. However, T-max did not show obvious increase trend during spring wheat growing seasons (p = 0.0672). Furthermore, T-max also had no distinct change before or after anthesis. T-min significantly increased during the whole growing season, as well as in pre- and post-anthesis stages. Correlation analysis indicated that T-max in the entire growing season and post-anthesis did not affect spring wheat yield, but high T-max during pre-anthesis can improve grain yield. The T-min during the life cycle and pre-anthesis both had positive relationship with grain yield. Moreover, elevated temperature from seedling to stem elongation can benefit tiller formation and thus increasing spike number, which contributed to the significant yield increase (p = 0.0093). Overall, climate warming affect spring wheat yield in cool area, and increasing temperature that was below the optimum temperature can benefit wheat productivity.

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