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将玉米秸、稻草、家畜粪、绿肥、及玉米、大豆和水稻根茬,分别与棕壤、草甸土和水稻土土样混合,装于砂滤管中,埋在上述相应土壤中.自1982年至1992年十年中定期取样测定各处理有机质含量,并计算腐解残留率.第一、二年有机物料分解很快,以后减慢,至第十年尚有部分有机质残留积累,尤其是根茬最高,其次是秸秆,绿萍也比较高,说明这些有机物料对调控土壤有机质作用较大.定期测定有机质活化度结果是开始两年较高,以后渐降,至第十年除秸秆仍有较高活化度外,其余已和原土一样.第十年测定了土壤腐殖质组成与光密度结果表明,这些性质的差异与土壤类型关系密切,有机物料种类影响不大.
Corn stalks, straw, livestock manure, green manure and corn, soybean and rice stubble were mixed with soil samples of brown soil, meadow soil and paddy soil, respectively, and placed in a sand filter tube buried in the corresponding soil From 1982 to 1992, samples were taken regularly to determine the content of organic matter in each treatment and to calculate the residual rate of decomposition.Firstly and secondly, the organic materials decomposed quickly and then slowed down, and some organic matter accumulated in the tenth year, especially Is the highest stubble, followed by straw, green duckweed is relatively high, indicating that these organic materials on the regulation of soil organic matter larger.Regular determination of organic matter activation is the result of two years of high, then gradually reduced to the tenth year in addition to straw Still have higher activation degree, the rest have the same with the original soil.The tenth year measured soil humus composition and optical density results show that the nature of these differences are closely related to the type of soil, organic matter type has little effect.