【摘要】 测定了大量施用有机肥及有机无机肥配合施用下土不同粒径微团聚体腐殖质的含量。结果表明：大量施用有机肥可以显著提高０．００５～０．０１ｍｍ微团聚体含量，但没有提高较大团聚体（＜０．０５ｍｍ）含量。大量施用有机肥可以提高各粒级腐殖质含量，而以０．０１～０．０５ｍｍ粒级提高最少。腐殖质分布的相对含量以大于０．０５ｍｍ团聚体增加最多，０．０１～０．０５ｍｍ增加最少，小于０．０１ｍｍ微团聚体腐殖质相对含量十分稳定，施肥对它们影响不大。不同处理土壤微形态差异明显。施用化肥对各项测定指标影响不大。更多还原

【Abstract】 Humic content of different-size microaggregate were determinated under a large number of organic manure or organic manure combined with chemical fertilizer application.The results indicated that 0.005～0.01mm microaggregate content was significantly increased as a large number of organic manure were applied whereas bigger microaggregate(>0.05mm)content.was not increased. The humic contents of each class of microaggregate were increased as a large number of organic manure were applied,but 0.01～0.05mm microaggregate got the least increase.As to the relative humic distributive amount,>0.05mm microaggregate got the most increase,0.01～0.05mm microaggregate was decreased and <0.01mm microaggregate was considerably stabalized, fertilization have little effect on the item.Soil micromorphology has significant difference in different treatment.The application of chemical fertilizer has little effect on those item mentioned above.更多还原