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我们用硼酸、尿素和过磷酸钙分别于油菜始薹期、始花期、结角期进行叶面施肥,三种肥料的浓度分别为:硼酸0.15％,尿素2％,过磷酸钙3.5％。以喷清水的为对照。试验的结果是:以喷硼的处理效果最佳,亩产314.2斤;喷磷的次之,亩产311.4斤;喷氮的亩产293.1斤。分别比对照(亩产269.8斤)增产16.45％,15.42％和8.97％。平均增产率为13.61％。施用时间:从产量形成的有关时期看,角数的形成是从越冬前花芽开始分化起;粒数的形成是从花芽的雌蕊原基伸长开始;粒重是从开花后胚珠授粉逐渐增加的。因此要达到油菜增枝增角、增粒和增加粒重的目的,喷施叶肥必须在油菜的全生育期进行。施叶肥的时间应以
We use boric acid, urea and superphosphate respectively at the beginning of rapeseed flowering stage, the first florescence stage foliar fertilization, three kinds of fertilizer concentrations were: boric acid 0.15%, urea 2%, superphosphate 3.5%. To spray water as a control. The test results are: the best boron treatment, 314.2 kg per mu; followed by phosphorus, mu produce 311.4 kg; nitrogen per mu 293.1 kg. Respectively 16.45%, 15.42% and 8.97% more than the control (269.8 kg per mu). The average rate of increase was 13.61%. Application time: From the relevant period of production, the formation of angle starts from flower buds before winter; the formation of grain number starts from elongation of flower bud pistil primordium; grain weight increases gradually from anther pollination after anthesis. Therefore, to achieve rape by increasing the angle, granulation and increase grain weight purposes, foliar spraying must be carried out in the rape’s whole growth period. Leaf fertilizer time should be