摘要
采用三元二次通用旋转组合设计研究了影响直播双低油菜产量的农艺措施,建立了双低油菜国豪油8号在四川丘区直播种植的高产栽培数学模型,并对8个重要农艺性状与小区产量之间进行通径分析。结果表明:在四川丘区,直播播期、密度和施肥量对国豪油8号产量均有显著影响,在本试验条件下,该品种直播栽培获得产量>2 799 kg/hm^2的农艺方案为:9月25—30日播种,密度45.0万~52.5万株/hm^2,施肥量0~750 kg/hm^2。农艺措施增产效应顺序为播期>密度>播期与施肥量>施肥量。直播油菜株高、有效分枝高度、主花序有效段长、一次有效分枝、二次有效分枝、单株有效角果数、千粒重和根茎粗对油菜产量的直接影响为单株有效角果数>主花序有效段长>二次有效分枝数>有效分枝高度>千粒重>株高>根茎粗>一次有效分枝数。直播油菜的二次有效分枝、根茎粗是影响油菜产量的重要农艺性状,二次有效分枝对产量起直接作用,而根茎粗主要是通过间接作用起到增产效果。
Using ternary quadratic general rotational combination design to study agronomic measures affecting double low rape yield.the high yield cultivation mathematical model of double low rape Guohaoyou 8 was established in hilly area of Sichuan ,and the path analysis between eight important agronomic characters and plot yield was also discussed.The results showed that in hilly area of Siehuan, seeding date ,density and fertilization had significant effect on the yield of Guohaoyou 8. Under the condition of this experiment, agronomic measures which could yield more than 2 799 kg/hm2 for the variety as follows ：September 25th to 30th planting,density 450 000-525 000 plants/hm2,fertilization 0-750 kg/hm2. The order of yield increasing effect was as follows ： sowing time, density, sowing date and fertilization. The effect of agronomic traits on rape yield was the number of effective pods per plant〉main inflorescence effective segment length〉second effective branch number〉effective branch height〉1000 grain weight〉 plant height〉root diameter〉first effective branch number. The second effective branches and stem diameter of direct seeding rape were the important agronomic traits which affecting the yield of rape ,the second effective branches played a direct role in the yield, and the root of the stem mainly played an indirect effect.
出处
《现代农业科技》
2017年第6期2-4,共3页
Modern Agricultural Science and Technology
基金
基金项目 国家油菜产业技术体系绵阳综合试验站
关键词
双低油菜
国豪油8号
产量
播期
密度
施肥量
农艺性状
四川丘区
double low rape
Guohaoyou 8
yield
seeding date
plangting density
fertilization
agronomic characters
hilly area of Sichuan
