据研究,每生产100公斤小麦,需要从土壤中吸收纯氮3公斤、有效磷1.5公斤、有效钾2.5公斤。氮是构成小麦体内蛋白质与叶绿素的重要成分,它能促进小麦根、茎、叶等营养器官的生长,增加绿色叶面积,加强光合作用和营养物质积累,增蘖、增小花,提高结实率。氮素缺乏,叶色淡绿、枯黄,植株矮小,生长不良;氮素充分,小麦茎叶繁茂,叶色深绿;但过多,又会引起小麦徒长、倒伏, According to the study, for every 100 kilograms of wheat produced, 3 kilograms of pure nitrogen needs to be absorbed from the soil, 1.5 kilograms of available phosphorus and 2.5 kilograms of available potassium. Nitrogen is an important component of wheat protein and chlorophyll. It can promote the growth of wheat root, stem, leaf and other vegetative organs, increase green leaf area, enhance photosynthesis and nutrient accumulation, increase tiller, increase flower, and increase seed setting rate. Nitrogen deficiency, leaf color light green, yellow, short plants, poor growth; nitrogen sufficient, wheat stems and leaves lush, dark green leaves; but too much, it will cause wheat leggy, lodging,