Optimizing agronomic practices for closing rapeseed yield gaps under intensive cropping systems in China
文献类型： 外文期刊
作者： Zhang Zhi 1 ; Cong Ri-huan 1 ; Ren Tao 1 ; Li Hui 1 ; Zhu Yun 1 ; Lu Jian-wei 1 ;
作者机构： 1.Huazhong Agr Univ, Coll Resources & Environm, Minist Agr & Rural Affairs, Key Lab Arable Land Conservat Middle & Lower Reac, Wuhan 430070, Peoples R China
2.Hubei Acad Agr Sci, Minist Agr & Rural Affairs, Key Lab Fertilizat Agr Wastes, Inst Plant Protect & Soil Fertilizer, Wuhan 430064, Peoples R China
关键词： rapeseed; yield gap; potential yield; boundary line; meta-analysis; Yangtze River Basin
期刊名称：JOURNAL OF INTEGRATIVE AGRICULTURE （ 影响因子：2.848； 五年影响因子：2.979 ）
ISSN： 2095-3119
年卷期： 2020 年 19 卷 5 期
页码：
收录情况： SCI
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-ett), 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 1893 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.
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