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晚播稻茬麦,由于季节迟,播种后温度下降,即使施用大量有机肥,因苗期得力慢,往往不能早发,苗弱蘖少,管理被动,中后期大量施用化肥,也是穗少、粒少、产量不高。我站试验,碳酸氢铵30斤作晚播稻茬麦基肥的亩产716斤,比作返青期追肥亩产614斤的增产16.6%。从大量生产实践和科学实验材料看,增产趋势是一致的,愈是低产田的增产幅度愈大。分析其原因是:一是提高了氮素化肥利用率。据试验资料,碳酸氢铵作基肥的利用率为50%,作返青肥的利用率仅28%,作基肥比作返青肥的利用率提高78.5%,也就
Late sowing rice stubble, due to late seasons, the temperature dropped after sowing, even if a large number of organic fertilizer, due to the slow seedling, often can not be early, less seedling tillers, passive management, large quantities of fertilizer in the late, but also less spike, Little grain, yield is not high. I test station, 30 kg of ammonium bicarbonate for the late sowing wheat base fertilizer per mu 716 kg, compared with the return of green per hectare yield 614 jins 16.16% increase. From a large number of production practices and scientific experimental materials, yield-growth trend is the same, the more low-yield field, the greater the yield increase. Analysis of the reasons are: First, improve nitrogen fertilizer utilization. According to experimental data, the utilization rate of ammonium bicarbonate as a basal fertilizer is 50%, the utilization rate of returning green manure is only 28%, and the utilization ratio of basal fertilizer to green manure is increased by 78.5%