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上海郊区1985年恢复单季晚稻种植以来,施肥方法烦琐,肥料用量偏高,花工多,成本高,因此在当前农村经济改革的形势下对单季晚稻施肥技术和用量的研究是十分必要的。该项研究所获结果有三点:1.欲使单季晚稻每亩产量达425—500公斤,可在每亩施猪塮15担的基础上,施用纯氮15—20斤,分两次施用。总量的三分之二在移栽前作基肥全耕层施入,三分之一在幼穗分化前5—7天作追肥施用。2.该项施肥技术减少了肥料用量,提高了肥料利用率。3.该项施肥技术不存在养分平衡失调的问题。
Since the restoration of single-cropped late rice in the suburbs of Shanghai in 1985, the fertilization method is cumbersome, the amount of fertilizer used is high, the cost is high and the cost is high. Therefore, it is necessary to study the technology and amount of single-cropped late rice fertilization under the current rural economic reform. . The results of this study have three points: 1. To make single-season late rice yield of 425-500 kg per mu, pigs per acre 15 pigs on the basis of the application of 15-20 pounds of pure nitrogen, administered in two batches . Two-thirds of the total is applied as basal fertilizer before transplanting and one-third is applied topdressing 5-7 days before spike differentiation. 2. The fertilization technology to reduce the amount of fertilizer, improve fertilizer utilization. 3. The fertilization technology does not exist the issue of nutrient balance disorders.