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本试验应用土壤测定和植株分析相结合的方法,采取等间隔多时期的测定方式,从研究谷子营养特点、吸肥最适比例着手,研究了土壤供肥与谷子吸肥的关系,阐述了谷子植株体内养分生理平衡的原则,养分主动吸收而被动吸收的条件、范围,氮素营养敏感期,氮磷养分大量吸收期,谷子不同生育时期吸收氮磷养分的最适比例及允许范围,从而确定了土壤氮磷最适供应比例及其范围。
In this study, soil testing and plant analysis were combined to take the method of determination at equal intervals and multiple periods. The characteristics of millet nutrition and the optimum proportion of sucking fertilizer were studied. The relationship between soil available fertilizer and millet sucking fertilizer was studied. The principle of physiological nutrient balance in plant, the condition and range of active absorption of nutrients, the sensitive period of nitrogen nutrition, the absorption period of nitrogen and phosphorus nutrients, the optimal proportion and allowable range of absorption of nitrogen and phosphorus in different growth stages of millet Soil nitrogen and phosphorus optimum supply ratio and its scope.