一、前言 腐植酸类肥料是 一种广泛适应我国土壤的好肥料,他兼备了无机肥料的速效性和有机肥料的持久性两大优点,且投资少,收效快,适合我国广大农村农户使用,本肥仍具有改良土壤,缓冲土壤的pH值,使农作物在更适宜的酸度环境生长,对改良我国北方兰考县式的盐碱地将有特殊功效。农田实践证 I. Introduction Humic acid fertilizer is a kind of good fertilizer which is widely adapted to the soil of our country. It combines both the quick-effect of inorganic fertilizer and the persistence of organic fertilizer. With less investment and quick effect, it is suitable for the rural households in our country, The fertilizer still has the advantages of improving the soil, buffering the pH value of the soil, allowing the crop to grow in a more suitable acidity environment, and improving the saline soil of Lankao County in northern China. Farmland practice certificate