Optimizing agronomic practices for closing rapeseed yield gaps under intensive cropping systems in China

作     者：ZHANG Zhi CONG Ri-huan REN Tao LI Hui ZHU Yun LU Jian-wei ZHANG Zhi;CONG Ri-huan;REN Tao;LI Hui;ZHU Yun;LU Jian-wei

作者机构：College of Resources and EnvironmentHuazhong Agricultural University/Key Laboratory of Arable Land Conservation(Middle and Lower Reaches of Yangtze River)Ministry of Agriculture and Rural AffairsWuhan 430070P.R.China Key Laboratory of Fertilization from Agricultural WastesMinistry of Agriculture and Rural Affairs/Institute of Plant Protection and Soil FertilizerHubei Academy of Agricultural SciencesWuhan 430064P.R.China 

出 版 物：《Journal of Integrative Agriculture》 (农业科学学报（英文版）)

年 卷 期：2020年第19卷第5期

页      面：1241-1249页

核心收录：

学科分类：09[农学] 0901[农学-作物学] 

基　　金：supported by the National Key Research and Development Program of China(2018YFD0200900) the earmarked fund for China Agriculture Research System(CARS-12) the Fundamental Research Funds for the Central Universities,China(2662017JC010) the National Project of Soil Testing and Fertilizer Recommendation,China support of the large-scale field experiments 

主　　题：rapeseed yield gap potential yield boundary line meta-analysis Yangtze River Basin 

摘      要：A yield gap analysis for rapeseed(Brassica napus L.) is critical to meeting the oil demand by identifying yield potential and yield constraints. In this study, potential yield(Y_p), attainable yield(Y_(att)), and actual yield(Y_(act)) for winter rapeseed were determined in five different zones of China. A boundary line approach was adopted to calculate Y_p, based on a large-scale field experimental database. A meta-analysis was conducted on the data obtained from 118 published studies to evaluate the effects of agronomic factors on rapeseed yield. The main results indicated that farmers only achieved 37–56% of the yield potential across the zones. The low altitude areas(L-URY) and lower reaches(LRY) of the Yangtze River Basin(YRB), China had high yield levels. The total yield gap was 1 893 kg ha^(–1), due to the agronomic management factors, environmental factors, and socioeconomic factors. The meta-analysis showed that weed control and drainage were the best management practices to improve yields(45.6 and 35.3%, respectively), and other practices improved yields by 17.1–21.6%. Consequently, to narrow the yield gap over the short term, the study could focus on techniques that are easily implemented to farmers.