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通过不同施氮量、密度处理,研究了氮肥、密度对机械撒播油菜产量的影响。结果表明:(1)施氮量、密度以及二者的交互作用对产量的影响均达到显著或极显著水平,机械撒播油菜产量随着密度和施氮量的增加而增加。(2)机械撒播油菜单株生产力、单株角果数均随施氮量的增加而增加,随密度的增加而减少,且差异达显著水平。密度、施氮量对机械撒播油菜每角粒数、千粒重的影响不大。(3)经济效益最大和产量最高的施氮量和密度组合为施纯氮300kg/hm2,密度为39万株/hm2。
Through different nitrogen and density treatments, the effects of nitrogen and density on the mechanical sowing rapeseed yield were studied. The results showed that: (1) The effects of nitrogen application, density and the interaction between the two on yield were significant or extremely significant. The yield of mechanical sowing rape increased with the increase of density and nitrogen application rate. (2) The productivity of mechanical sowing single plant, the number of pod per plant increased with the increase of nitrogen application rate, decreased with the increase of density, and the difference reached a significant level. Density and N application rate had no significant effect on the number of grains and 1000-grain weight of mechanical sowing rapeseed. (3) The combination of nitrogen application rate and density with the highest economic benefit and the highest yield was applied nitrogen of 300kg / hm2 and density of 390,000 plants / hm2.