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前言 众所周知,尿素和春小麦混施,亩用量超过10斤便出现烧种。尿素秋深施效果好,但由于受时间、机具、肥料等因素的影响,每年秋施面积至多占播种面积的25—30％。尿素根际追肥受墒情影响,增产不稳定,由于表层养分集中,招致严重的挥发和流失。所以,尿素除了春、秋深施作基肥,播种时作种肥外,黑龙江国营农场每年飞机作业面积在数百万亩次以上,各生产队还拥有足够数量的喷洒机具,为尿素叶面施肥提供了充分的条件。因此探讨尿素叶面喷施的效果是我省国营农场春小麦生产中的一个重要问题。
Preface As we all know, urea and spring wheat mix, mu amount of more than 10 pounds appeared burning. Deep autumn urea application effect, but due to the time, machinery, fertilizers and other factors, the autumn area each account for up to 25-30% of sown area. Urea rhizosphere topdress by the impact of moisture, yield instability, due to the concentration of surface nutrients, leading to serious evaporation and loss. Therefore, in addition to spring, autumn and deep application of basal fertilizer, seeding for fertilizer, the annual operating area of Heilongjiang state-owned aircraft in millions of acres and above, the production team also has a sufficient number of spraying equipment for urea foliar fertilizer Provided sufficient conditions. Therefore, to explore the effect of urea foliar spraying is our province state farm spring wheat production is an important issue.