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土壤中养分的存在形态不同对作物的可给性不同。从植物营养的角度虽然可将土壤中的锰分为三种形态:即速效锰(为作物直接吸收利用的二价锰)、缓效锰(主要为三价锰的氧化物,易于转化为二价锰)和无效锰(不易为作物吸收利用的四价锰),但用试验手段却很难获得这些结果。习用的方法是采用某种提取剂以提出某一形态的锰。本文根据盆栽试验和土壤测定的资料,对易还原态、代换态、有机络合剂络合态、磷酸盐溶解态以及水溶态锰在石灰性土壤中的转化和含量变化进行了初步探讨。
Soil nutrients in different forms of availability of different crops. Although the manganese in soils can be divided into three forms from the point of view of plant nutrition: quick-acting manganese (bivalent manganese directly absorbed by crops), slow-acting manganese (mainly trivalent manganese oxide, which is easily converted into di Manganese) and Manganese (Manganese which is not easily absorbed by crops), but these results are very difficult to obtain by experimental means. The conventional method is to use some sort of extractant to propose some form of manganese. Based on the data of pot experiment and soil test, this paper discussed the transformation and content change of easily reduced, substituted, organic complexing agent complex, phosphate dissolved state and water-soluble manganese in calcareous soil.