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近十多年来,国内对氮、磷、钾化肥的施用量及配合比例进行了大量的试验研究,提出了很多见解。根据前人提出的计划施肥量推算公式,我们通过1976年以来全地区的189项次田间试验结果,统计得出了土壤的供肥能力、化肥利用率和养分分级指标等参数,并应用土壤普查成果,提出了划区分等、简便易行的配比施肥方案。1982年共印发《配比施肥通知书》10万余份,培训技术骨干3万余人,实行分区配比施肥面积达450万亩。根据试验示范实收产量结果,分区配比施肥比习惯施肥平均每亩增产稻谷160斤,增加纯收入16.8元。
In the recent ten years, a large number of experimental studies have been conducted on the amount and proportion of nitrogen, phosphorus and potassium fertilizers in China, and many opinions have been put forward. According to the predetermining formula of projected fertilization, we obtained the statistics of soil fertility, fertilizer use efficiency and nutrient grading index through the 189 field test results in all regions since 1976, and applied the soil census Results, put forward the zoning, etc., simple and convenient ratio fertilization program. In 1982, a total of 100,000 copies of the “Notice on Proportion Fertilization” were issued, with more than 30,000 technical training cadres and a fertilization area of 4.5 million mu by the district. According to the experimental demonstration yield results, the ratio of fertilization than the conventional fertilization average yield of 160 kg of rice per mu, an increase of net income of 16.8 yuan.