播期、密度对“双低油菜”菜苔营养成分及菜籽产量的影响

Effects of sowing date and planting density on the nutrient composition of Brassica flower stalk and rapeseed yield of double-low Brassica

采用大田小区栽培试验,研究了皖油18、中油杂10号、中双8号3个"双低油菜"品种菜苔的营养成分、饲用价值以及播期、密度对菜籽产量的影响。结果表明,双低油菜苔干物质含量较高,粗纤维含量较低,粗脂肪、粗蛋白和无氮浸出物含量较高,其化学营养类型属N型,是优质青饲料。品种、密度及品种×播期对菜苔产量有极显著影响(P<0.01);品种、播期对菜籽产量有极显著影响(P<0.01),播期×密度对菜籽产量有显著影响(P<0.05)。分析比较发现,中油杂10号、8月28日播种、密度1.2×105株/hm2时饲用营养产量最高,"油饲两用"经济效益最好。

Effects of sowing date and planting density on the nutrient composition of Brassica flower stalk and rapeseed yield were studied in a field plot experiment by using 3 double-low Brassica varieties, Wanyou 18, Zhongyouza 10 and Zhongshuang 8. The results indicate that the dry matter of Brassica flower stalk was high, the crude fiber content was low, the content of crude fat, crude protein and content of nitrogen-free extract was high. The chemical type of nutrition in Brassica flower stalk belongs to N type. It is quality green forage. Variety, density and interactions between variety and sowing date had extremely significant effect on the yield of Brassica flower stalk （P〈0.01） ; Variety and sowing date have extremely significant effect on rapeseed yield（P 〈0.01）, the interactions between sowing date and density had significant effect on the yield of rapeseed （P〈 0.05）. In conclusion, Zhongyouza 10 which sowing at August 28,120 000 plants/hm^2 had the tiptop nutrition output value and economic benefits.