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种植大豆,要想夺取高产,在施好基肥和种肥的基础上,仍需合理追肥,及时补充大豆所需的各种养分,其追肥技巧是:一、早施苗肥大豆幼苗期,根瘤处于形成阶段,尚无固氮能力,如果氮素营养供应不及时,就会产生“饥饿”现象,影响壮苗与早发。早追苗肥可促进根、叶生长,使幼茎粗壮和腋芽分化迅速。一般在第一片复叶展开时,每亩追尿素3-5公斤。大豆幼苗对磷素反应极为敏感,苗期追施适量磷肥,有利于促进大豆根瘤的形成和发育,亩施过磷酸钙7.5-10公斤。
Soybean cultivation, in order to seize the high yield, in the good base fertilizer and fertilizer on the basis of still need to rationalize topdressing, timely replenishment of various nutrients required by soybean, the top dressing techniques are: First, early seedling fertilizer Soybean seedling stage, nodules In the formation stage, there is no ability to fix nitrogen, if the supply of nitrogen nutrition is not timely, it will produce “hunger ” phenomenon, affecting seedlings and early onset. Early Miao fertilizer can promote root and leaf growth, young stem thick and rapid differentiation of axillary buds. Generally in the first compound leaf unfolded, 3-5 kg of urea recovery per acre. Soybean seedlings are extremely sensitive to the reaction of phosphorus, the amount of phosphate fertilizer topdressing at seedling stage, is conducive to promoting the formation and development of soybean nodules, Mushi Shi calcium phosphate 7.5-10 kg.