Contribution of ear photosynthesis to grain yield under rainfed and irrigation conditions for winter wheat cultivars released in the past 30 years in North China Plain

doi:10.1016/S2095-3119(16)61408-9

摘要/Abstract

Abstract: To understand the contribution of ear photosynthesis to grain yield and its response to water supply in the improvement of winter wheat, 15 cultivars released from 1980 to 2012 in North China Plain (NCP) were planted under rainfed and irrigated conditions from 2011 to 2013, and the ear photosynthesis was tested by ear shading. During the past 30 years, grain yield significantly increased, the flag leaf area slightly increased under irrigated condition but decreased significantly under rainfed condition, the ratio of grain weight:leaf area significantly increased, and the contribution of ear photosynthesis to grain yield changed from 33.6 to 64.5% and from 32.2 to 57.2% under rainfed and irrigated conditions, respectively. Grain yield, yield components, and ratio of grain weight:leaf area were positively related with contribution of ear photosynthesis. The increase in grain yield in winter wheat was related with improvement in ear photosynthesis contribution in NCP, especially under rainfed condition.

Key words: wheat , ear photosynthesis , grain yield , improvement of cultivars

WANG Yun-qi, XI Wen-xing, WANG Zhi-min, WANG Bin, XU Xue-xin, HAN Mei-kun, ZHOU Shun-li, ZHANG Ying-hua. [J]. Journal of Integrative Agriculture, 2016, 15(10): 2247-2256.

WANG Yun-qi, XI Wen-xing, WANG Zhi-min, WANG Bin, XU Xue-xin, HAN Mei-kun, ZHOU Shun-li, ZHANG Ying-hua. Contribution of ear photosynthesis to grain yield under rainfed and irrigation conditions for winter wheat cultivars released in the past 30 years in North China Plain[J]. Journal of Integrative Agriculture, 2016, 15(10): 2247-2256.

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