有机培肥后土壤水浸提取液成分的研究

土壤浸提液经浓缩后分成元素组成不同的顶层凝结物，中层溶解物和底层沉淀物三部分。浸提液中水溶性有机物和碳酸盐的含量，施用玉米秸秆处理高于对照处理。随着浸提液浓缩的进行，有机质全部形成不溶性的复合物。溶液中的氮以复合物的形式存在，并有一部分随着浓缩的进行而进入固相中。

Study on Water Solutions Extracted From the Soils Applied With Corn Stalk

After the water solutions extracted from soils was concentrated to 1/50 of the initial, the water soluble substances were divided into three fractions, namely: insoluble substances in surface of the solutions(SIS), soluble substances (SS) and precipitate in the sediment (PS). The composition of elements in each fractions was different. The contents of water soluble organic substances and carbonates in the soils applied with corn stalk residues were higher than that of the control treatment. With the concentrating progress of the water solutions, all water soluble organic substances were transformed into insoluble forms. Nitrogen existed as complexes in the solutions, some nitrogen complexes were also transformed into insoluble substances after concentration, and the amounts were correlative with the content of organic substances and carbonates in initial solutions.