氮磷肥对甜菜根产量反应曲面方程效应的初步研究

Preliminary Studies on Effect of Equation of Curved Surface to Sugarbeet Root Yield Response with N, P Fertilizer

以二因素D—饱和最优设计,探讨了氮、磷肥在较高肥力土壤和中低肥力土壤对甜菜根产量的影响。利用产量反应曲面确定了氮、磷肥合理配比区和肥料成本最低施肥线(OP)。结果表明:任何地区靠单纯增施氮、磷肥而提高的产量是有限的;随根产量的提高适宜的氮、磷比例范围会缩小,但都有磷肥比例逐渐增大的趋势。通过对两种地力组分析,认为在较高土壤肥力区,氮、磷肥适合用量分别为6.09kg/亩、10.91kg/亩;中低土壤肥力区为7.8kg/亩、11.78kg/亩。

An approch on effect of N, P fertilizer to sugarbect root yield under high, mid and low fertility of soil with the most excellent design of two factors in D-saturation. The proper mixture section of N, P fertilizer determined and lowest fertilizer cost of manure spread line (OP) determined also with the curved surface of yield response. The results have shown that the yield increasing is limited which only depended on raising spread manure (N or P). The optimum ratio of N, P would be reduced followed by root yield increased, but they have the trend increased of P ratio step by step , the analysed results shown that the amount of suited applying of N, P were 6.09kg/mu, 10.91kg/mu respectively where in higher soil fertility, and in mid to low soil fertility were 7.8kg/mu, 11.78kg/mu.