%0 Journal Article
%T Status and perspective of crop yield gap<br>作物产量差研究与展望
%A WANG Chun-Zhi
%A LI Liang-Tao
%A CHEN Jian
%A LIU Ming-Qiang
%A YU Zhen-Rong
%A <br>王纯枝
%A 李良涛
%A 陈 健
%A 刘明强
%A 宇振荣
%J 中国生态农业学报
%D 2009
%I 
%X There exists a large gap between crop potential yield and actual yield for cultivated farmlands. Variation in crop yield from field to field is a common ubiquitous feature across agricultural landscapes. Closing yield gap plays an important role in increasing food production and ensuring food security. This study introduces the importance and necessity for closing yield gap and summarizes domestic and international research progress in yield gap analysis. The development and definition of yield gap, research method and scale, and data analysis method are documented. The application of crop growth model in yield gap research is also discussed. Finally, the main problems currently limiting yield gap analysis are advanced and research trend discussed.
%K Crop yield
%K Crop potential yield
%K Crop yield gap
%K Crop growth model
%K Research method<br>作物产量
%K 作物潜在产量
%K 作物产量差
%K 作物生长模型
%K 研究方法
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=03F54A49DE00578AA0E5DDF5BC021AA7&cid=1A8B5357F0EF07B8&jid=AB3ABF502E2E1FF39F0E3B80164C9031&aid=7E897B0195C38C7AB98D9E9BCAD95A3E&yid=DE12191FBD62783C&vid=BCA2697F357F2001&iid=B31275AF3241DB2D&sid=2F8F471CEC23CD85&eid=D319A8CAE3372156&journal_id=1671-3990&journal_name=中国生态农业学报&referenced_num=0&reference_num=45