播种密度对油菜倒伏指数的影响及品种抗倒性比较  

Effects of Planting Density on Lodging Index and Comparison of Varieties Lodging Resistance in Rapeseed (Brassica napus L.)

作　　者：刘唐兴[1] 官春云[1] 雷冬阳[2] 陶甲寅[2] 

机构地区：[1]湖南农业大学油料作物研究所,湖南长沙410128 [2]湖南生物机电职业技术学院,湖南长沙410127

出　　处：《江西农业学报》2008年第2期1-3,共3页Acta Agriculturae Jiangxi

基　　金：国家948项目(2003-Q04)"油菜特异资源和育种新技术的引进;改良和创新研究";湖南省教育厅项目(06D057)"甘蓝型油菜抗倒性比较研究"

摘　　要：于2006～2007年在湖南农业大学试验农场研究了不同播种密度对9个油菜品种倒伏指数的影响，并对品种的抗倒性进行比较。结果表明：油菜终花期后，播种密度显著影响品种的倒伏指数；除中双9号外，品种倒伏指数随着播种密度的增加而升高；品种倒伏指数的显著升高表现在成熟期，特别表现在收获前15d左右；从终花期到成熟期，主茎中总糖和粗纤维含量明显降低。The effects of planting density on lodging index and comparison of lodging resistance in 9 varieties of rapeseed on experimental farm of Hunan Agricultural University from 2006 to 2007 were studied in this paper. The results indicated that planting densities significantly affected the lodging index after final flowering; the lodging index increased with planting density except for Zhong-shuang 9 ; the lodging index increased rapidly at maturity stage, especially on the !Sth day before harvest. The content of total sugar and coarse fiber in culm was sharply decreasing from final flowering to maturity stage.

关 键 词：甘蓝型油菜 倒伏指数 播种密度 品种 抗倒性 

分 类 号：S565.4[农业科学—作物学]