Journal of Integrative Agriculture ›› 2016, Vol. 15 ›› Issue (10): 2247-2256.DOI: 10.1016/S2095-3119(16)61408-9

• 论文 • 上一篇    下一篇

  

  • 收稿日期:2015-10-26 出版日期:2016-10-01 发布日期:2016-10-01

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

WANG Yun-qi, XI Wen-xing, WANG Zhi-min, WANG Bin, XU Xue-xin, HAN Mei-kun, ZHOU Shun-li, ZHANG Ying-hua   

  1. College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, P.R.China
  • Received:2015-10-26 Online:2016-10-01 Published:2016-10-01
  • Contact: ZHANG Ying-hua, Tel: +86-10-62732431, E-mail: zhangyh1216@126.com
  • Supported by:

    This study was supported by the National Natural Science Foundation of China (31401297), the National Key Research and Development Program of China (2016YFD0300105), the Chinese Universities Scientific Fund (2016NX002), and the Earmarked Fund for Modern Agro-Industry Technology Research System, China (CARS-3).

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