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通过对浙双 72的播种期、种植密度和氮肥用量 3因子正交试验表明 ,对油菜产量起主要作用的栽培因素是播种期和氮肥用量 ,种植密度对产量的影响不显著。在高产栽培中 ,应适期早播 ,适当增加氮肥用量 ,同时应适度密植。生产应用中 ,播种期以 9月 2 5日左右为宜 ,施氮量 2 76kg hm2 ,种植密度 10 5万～ 13 5万株 hm2 。
Through the orthogonal experiment of Zhenshuang 72 with sowing date, planting density and nitrogen fertilizer dosage, the orthogonal experiment showed that the main factors affecting the yield of rape were sowing date and amount of nitrogen fertilizer. The effect of planting density on yield was insignificant. In high-yielding cultivation, should be suitable for early sowing, appropriate to increase the amount of nitrogen fertilizer, should also be moderately dense planting. In the production and application, the sowing date should be around September 25, the nitrogen application rate should be 2 76kg hm2, and the planting density should be between 105,000 and 135,000 hm2.