摘要
采用免耕直播的方法,研究了不同播期和密度对油菜生长、冻害情况及产量的影响。结果表明,播期推迟,越冬期油菜苗高、绿叶数、叶面积指数、根颈粗、开展度、地上和地下部分干重逐渐下降,冻害指数增加,全生育期缩短,产量降低;密度增加,除了叶面积指数逐渐增大,其他生物学性状指标降低,冻害指数增加,单株有效角果数、每角粒数、千粒重和单株产量呈下降的趋势,密度为31.5万～36.0万株/hm2产量较高。
Under no tillage and direct seeding cultivation condition, the growth, freeze injure index and yield of rapeseed were investigated with different sowing date and plant density.The main results were as follows： with the delay of sowing date, the plant height, green leaves, leaf area index （LAI）, root neck diameter, leaf spreading, the dry weight of shoot and root were all decreased.The freeze injure indexes were increased.The whole growth period and the yield were declined.When the plant density increased, except for the increasing of LAI, the other biological characteristics were all declined.The freeze injure indexes were increased, the yield components including the pods per plant and the seeds per pod and the 1000-seed weight and the yield per plant were decreased.The plant densities of 315～360 thousand plants per hectare might contributed to higher yield of Zhongshuang No.9 under no tillage cultivation condition.
出处
《湖北农业科学》
北大核心
2010年第7期1580-1583,共4页
Hubei Agricultural Sciences
基金
国家"十一五"科技支撑计划重点项目(2006BAD21B03)
中国农业科学院油料作物研究所所长基金项目(SZ200803-07)
关键词
甘蓝型油菜
免耕
播期
密度
产量
Brassica napus L.
no-tillage
sowing date
plant density
yield
