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(一)冬小麦对土壤磷素的要求,速效磷含量20ppm是一个界限,低于此值,施磷肥有增产效果,高于此值,施磷肥效果不明显。 (二)小麦营养器官所吸收的磷素,在灌浆期间,有70％以上进入子粒。要想获得高产,必须创造条件,使小麦植株在营养生长期贮备足够的磷素。 (三)灌浆期根外喷施磷肥,作为一种研究方法是有效的,而用于生产做为一种提高产量的栽培措施,尚须进一步研究。
(A) the requirements of winter wheat on soil phosphorus, available phosphorus content of 20ppm is a limit below this value, phosphate fertilizer yield increase, above this value, the effect of phosphate fertilizer is not obvious. (B) absorbed by wheat vegetative organs of phosphorus, during filling, more than 70% into the grain. In order to achieve high yields, conditions must be created for wheat plants to retain sufficient levels of phosphorus during vegetative growth. (III) Application of phosphate fertilizer outside the root filling stage is effective as a research method. However, further studies are needed for the cultivation as a cultivation measure to increase the yield.