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采用二次回归通用旋转组合设计的方案，在碳酸盐褐土上进行田间试验。结果表明，钾氮肥配施可显著增加青椒地上部Ｎ、Ｐ、Ｋ的含量，相对减轻Ｋ对Ｃａ、Ｍｇ的颉颃并提高其光合强度。钾、氮对青椒产量的互作效应达正的显著水平。一定氮水平下增施钾肥可显著提高青椒Ｖｃ含量。在本试验条件下，获得青椒高产优质的施肥量为Ｎ１８８～２４８ｋｇ／ｈｍ２和Ｋ２Ｏ２３８～２５８ｋｇ／ｈｍ２。
Field experiments were carried out on carbonate-brown soil using quadratic regression general rotation combination design. The results showed that potassium and nitrogen fertilizers could significantly increase the N, P, K contents in shoots and reduce the antagonism of K to Ca and Mg and increase their photosynthetic capacity. The interactive effect of potassium and nitrogen on yield of green peppers reached a significant positive level. The increase of potassium fertilizer under a certain nitrogen level can significantly increase the Vc content of green pepper. Under the experimental conditions, the yield of green pepper with high yield and good quality was N188 ~ 248kg / hm2 and K2O238 ~ 258kg / hm2.