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综合几年的试验调查,导致小麦穗重降低的主要原因,有以下四个方面: 一、追肥不当氮素化肥追的过晚、过多,小麦植株在生育后期含氮量过大,养分运转不畅,就造成贪青晚熟、青干早衰、籽粒秕瘦。1976年因冬寒来的早,干冷时间长,不少麦田的底肥到1977年春尚未分解,且苗情差,群体小,耗肥少,有的社队为了急于获得壮苗,又不适当地加大了追肥量。如孔营大队丰产田,越冬期每亩追碳
Comprehensive investigation of several years, leading to the reduction of wheat ear weight the main reasons, the following four aspects: First, improper dressing Nitrogen fertilizer chase too late, too much, the nitrogen content of wheat plants in the late growth stage, nutrient operation Poor, resulting in late blooming, green dry premature aging, lean grains. In 1976, due to the early winter cold, dry for a long time, a lot of wheat at the base of the fertilizer until the spring of 1977 has not yet broken down, and the seedling poor, small groups, consumption of less fat, and some clubs anxious to obtain strong seedlings, but not properly Increase the amount of dressing. Such as camp hole Brigade fertile field, catch the carbon per acre over the winter