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试验较详细地研究了小麦各生育期氮素的营养与干物质以及产量的关系。试验证明,春小麦的干物质积累和氮的吸收趋势相一致,前期吸氮量少,从开花到灌桨明显增加,以后逐渐减少,经二年的框栽和校内外田间试验指出,根据小麦氮营养的特点,按一般浅施种肥与追肥的方法,不能满足小麦后期氮营养的需要,深施10—12厘米尿素与浅施种肥相结合的方法,可提高产量11.5—13.9％,并达到显著水平,可在我省大面积推广应用。
The experiment studied in more detail the relationship between nitrogen nutrition and dry matter and yield of wheat at different growth stages. The experiment proves that the dry matter accumulation of spring wheat is consistent with the trend of nitrogen absorption, the amount of nitrogen absorption in the early stage is small, the amount of nitrogen absorption is obviously increased from flowering to filling, and then decreases gradually. After two years of framing and in-field and off-campus experiments, Nutritional characteristics, according to the general method of shallow application of fertilizers and topdressing can not meet the needs of late wheat nitrogen nutrition, deep application of 10-12 cm urea and shallow application of fertilizer combination method can increase the yield of 11.5-13.9%, and Reached a significant level, can be widely applied in our province.