摘要
对不同播种期条件下直播油菜产量构成因素及干物质生产的差异进行了研究。结果表明:随着播种期的推迟,直播油菜的籽粒产量呈逐渐下降的趋势;江苏中部地区直播油菜最适播种期为9月下旬~10月3日,最迟播种期为10月16日~10月24日;迟直播条件下油菜产量较低,其主要原因是单株角果数较少,其次是千粒重较小;迟直播油菜单株角果数低的主要原因在于开花前植株的生长量较少。
The difference of yield components and the weight of dry matter at maturing stage among different sowing dates in direct-sowing rapeseed were studied.The main results were as follows:The yield of direct-sowing rapeseed decreased as the sowing date postponed.In the middle region of Jiangsu province,the optimum sowing date of direct-sowing rapeseed was in the range of September 21 to October 3 and the lastest sowing date was about October 24.The main reason of low yield in late direct-sowing rapeseed was the ...
出处
《扬州大学学报（农业与生命科学版）》
CAS
CSCD
北大核心
2009年第2期64-68,共5页
Journal of Yangzhou University：Agricultural and Life Science Edition
基金
江苏省农业科技支撑计划项目(BE2008369)
江苏省农机三项工程项目(NJ2006-43)
江苏省高校自然科学基础研究项目(08KJD210005)
关键词
油菜
迟直播
产量构成
通径分析
rapeseed
late direct-sowing
yield components
path analysis
