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在自然条件和人为生产条件下,每年都有大量有机质补给土壤。这些有机物质在土壤中经过生物化学、化学和物理化学的作用,发生着数量和本性的变化。 动植物性的残体(主要是植物性的),经过土壤生物化学的作用,形成一类特殊的有机化合物——土壤腐殖质。腐殖质可以分为三类主要的化合物:(1)胡敏酸;(2)富里酸;(3)胡敏素与乌里敏素,又称腐殖质碳。各类腐殖质在土壤中常与土壤的矿物质部分呈不同紧密程度的团聚状态,形成各种有机-矿质化合物或复合胶体。它们在土壤中结合的方式和数量,可以标志
Under natural and man-made conditions, there is a large amount of organic matter supplied to the soil every year. These organic substances undergo a change in quantity and nature in the soil through biochemical, chemical and physico-chemical effects. Animal and plant residues (mainly plant), through the role of soil biochemistry, the formation of a special class of organic compounds - soil humus. Humus can be divided into three main types of compounds: (1) humic acid; (2) fulvic acid; (3) humin and Ulimin, also known as humus carbon. Various types of humus in the soil often with the mineral part of the soil showed a different degree of agglomeration, the formation of a variety of organic - mineral compounds or composite colloids. The way and how much they bind in the soil can be flagged