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按农牧渔业部农业局1986年7月颁发的配方施肥技术工作要点,遵循浙江省配方施肥技术试行方案的因土定产,因产定氮,因缺补缺,高产栽培等四个技术环节,对本地区进行配方施肥,取得了可喜的成果,平均亩增稻谷26.58公斤,增产率为6.6％,亩节省氮化肥2.5—8.5斤,亩增加净收入12.35元。但对1987年早稻配方施肥大量试验数据的统计分析表明,早稻“因产定氮”所确定的氮化肥用量准确性,除受氮肥利用率影响外,还受土壤质地、前作类型、早稻品种等因素的综合影响。因此,仅以早稻“因土定产”的目标产量,乘以早稻的吸氮系数(0.018公斤纯N/100公斤稻谷)来代替定氮系数,以确定氮化肥用量,以便发挥更大效益。
According to the key points of the formula fertilization technology issued by the Bureau of Agriculture of the Ministry of Agriculture, Animal Husbandry and Fishery in July 1986, following the four technological links of formulating the pilot scheme of formula fertilizer technology in Zhejiang Province for soil production due to lack of production, Fertilization of the region, and achieved gratifying results, an average of 26.58 kilograms of rice by increase, yield was 6.6%, saving 2.5-8.5 kg of mu of nitrogen, mu increase net income of 12.35 yuan. However, a statistical analysis of a large number of experimental data on the 1987 formula fertilization showed that the accuracy of the amount of nitrogen fertilizer determined for “early-rice” due to the production of nitrogen was affected not only by the rate of nitrogen utilization, but also by the soil texture, pre-type, The combined effect of factors. Therefore, multiplying the target yield of early rice due to local production by the N absorption coefficient of early rice (0.018 kg of pure N / 100 kg of rice) instead of the nitrogen fixation coefficient to determine the amount of nitrogen fertilizer for greater efficiency.