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有一种肥料,它是氮肥的缓释剂,磷肥的增效剂,钾肥的保护剂,中微量元素的螯合剂,它就是腐植酸肥料。腐植酸是一种天然有机质,它是亿万年前远古时期森林、草原、沼泽等动植物的遗骸,经过地壳的变化和植物微生物分解,以及一系列的化学转化而积累起来的一类天然有机化合物。它大量的存在于褐煤、风化煤、泥炭中。
There is a kind of fertilizer, which is a slow release agent of nitrogen fertilizer, a synergist of phosphate fertilizer, a protector of potash fertilizer, a chelating agent of trace elements, and it is a humic acid fertilizer. Humic acid is a kind of natural organic matter. It is a kind of natural and organic organic matter accumulated in millions of years ago in the remains of forests, grasslands, marshes and other animals and plants in ancient times, crustal changes and plant microbial decomposition, and a series of chemical transformations Compound. It exists in a large number of lignite, weathered coal, peat.