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从化县龙潭公社于1975、1976年进行了水稻深层施肥的科学实验:1、将插秧前基肥面施改为深施;2、将碳酸氢铵(以下简称碳铵)作追肥撒施改为在水稻生育中期(即幼穗第一苞分化期或第一次枝梗原基分化期)用球肥深施。结果,提高了肥料利用率,增加了单位面积产量。1976年全公社增产稻谷二百七十多万斤,其中晚稻在寒露风的危害下仍增产九十二万斤。现将试验结果简报如下。
In 1975, 1976, Longtan Commune of Conghua County carried out scientific experiments on deep fertilization of rice: 1, changing the basal fertilizer application to deep application before transplanting; 2, changing the ammonium bicarbonate (hereinafter referred to as ammonium bicarbonate) Mid-fertile rice (ie, the first panicle young panicle or the first branch of primordium differentiation period) with the ball deep application. As a result, fertilizer efficiency is increased and production per unit area is increased. In 1976, the entire commune increased more than 2.7 million tons of rice, of which late rice still produced 920,000 tons of harms under the dew of cold and wind. The test results are summarized below.