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Designing high-yielding wheat crops under late sowing: a case study in southern China

文献类型： 外文期刊

作者： Liu, Ke 1 ; Harrison, Matthew Tom 2 ; Wang, Bin 3 ; Yang, Rui 1 ; Yan, Haoliang 1 ; Zou, Juan 4 ; Liu, De Li 3 ; Meinke, Holger 5 ; Tian, Xiaohai 1 ; Ma, Shangyu 6 ; Zhang, Yunbo 1 ; Man, Jianguo 7 ; Wang, Xiaoyan 1 ; Zhou, Meixue 2 ;

作者机构： 1.Yangtze Univ, Hubei Collaborat Innovat Ctr Grain Ind, Sch Agr, Jingzhou 434025, Hubei, Peoples R China

2.Univ Tasmania, Tasmanian Inst Agr, Burnie, Tas 7320, Australia

3.Wagga Wagga Agr Inst, New South Wales Dept Primary Ind, Wagga Wagga, Tas, Australia

4.Inst Food Crops, Hubei Acad Agr Sci, Wuhan 430064, Peoples R China

5.Univ Tasmania, Hobart, Tas 7001, Australia

6.Anhui Agr Univ, Coll Agron, Hefei 230036, Anhui, Peoples R China

7.Huazhong Agr Univ, Coll Plant Sci & Technol, MARA Key Lab Crop Ecophysiol & Farming Syst Middl, Wuhan 430070, Peoples R China

关键词： Wheat yield; Hypothetical genotypes; Late sowing; APSIM-Wheat; Southern China

期刊名称：AGRONOMY FOR SUSTAINABLE DEVELOPMENT （ 影响因子：7.832； 五年影响因子：10.983 ）

ISSN： 1774-0746

年卷期： 2022 年 42 卷 2 期

页码：

收录情况： SCI

摘要： Cropping of rice and wheat (Triticum aestivum L.) in rotation contiguously in the same field is a fundamental pillar of double-cropping systems in southern China. Yields of such cropping systems are increasingly challenged as climate change (CC) drives increases in autumnal rainfall, delaying rice harvesting and subsequent sowing of wheat. Here, our purpose was to identify prospective traits of wheat crops enabling adaptation to later sowing and successively truncated growing seasons caused by CC. To identify traits that maintained or improved yields, we constructed 4,096 hypothetical genotypes underpinned by step-wise variations in parameters regulating phenology, growth and yield components. We then assimilated biophysical response surfaces through genotype (G) by environment (E) by management (M) analyses (GxExM) using six locations spread across the breadth of southern China. We showed that later sowing reduced cumulative radiation interception, cumulative thermal time and crop capture of growing season rainfall. The culmination of these factors shortened crop duration and decreased biomass accumulation and retranslocation after anthesis, reducing grain number and penalising yields. Genotypes that had greater radiation use efficiency, longer juvenile phases and greater grain filling rates were more effective in alleviating yield losses with delayed sowing. However, not even the highest yielding genotype x management combination could entirely alleviate yield losses with delayed sowing. Our results suggest that CC and increasingly frequent extreme climatic events may reduce wheat yields in such cropping systems in the absence of other adaptation.

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