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随着农业生产水平的不断提高,逐渐增加了对土壤中氮肥的投入,这就要求我们确定合理的氮肥施用量,既保证高产优质的养分供应,又能培养地力,获得较高的经济效益,又能防止浪费肥料和产生污染.为此,我们于1981～1985年通过田间试验,研究了不同肥力土壤的基础供氮能力、肥料的氮素利用率、作物对土壤氮素的依存率及每百斤籽粒的吸氮量等,为科学的确定氮肥施用量提供依据.
With the continuous improvement of agricultural production, and gradually increase the input of nitrogen in soil, which requires us to determine a reasonable amount of nitrogen fertilizer, both to ensure high yield and quality of nutrients supply, but also cultivate fertility, access to higher economic benefits, But also to prevent the waste of fertilizers and pollution.To this end, we conducted field experiments from 1981 to 1985 to study the basic nitrogen supply capacity of different fertility soils, nitrogen utilization efficiency of fertilizers, the dependence of crop nitrogen on soil and each Nitrogen absorption rate of 100 kg grain, etc., to provide a scientific basis for determining the amount of nitrogen fertilizer.