中文摘要：

研究连续20年18个不同施肥处理土壤的活性有机质及碳库管理指数，结果表明，设施土壤有机质、活性有机质含量和碳库管理指数均明显高于大田土壤，有机肥与化肥配施有助于活性有机质的提高。各处理中，APK的LOM最高，BN2的LOM最低，3个组分的活性有机质含量为高活性有机质〉中活性有机质〉低活性有机质。此外，土壤活性有机质、总有机质及碳库管理指数之间均呈极显著相关。

英文摘要：

The experiment was conducted to study the Labile Organic Matter （LOM） and Carbon Pool Management Index （CPMI） of eighteen kinds of soil which have been fertilized differently for twenty years. The results showed that the Organic Matter content of the soil in the vegetable sheltered field soil was higher than that in the field soil obviously, the same as the Labile Organic Matter and Carbon Pool Management Index, and that supplying organic manures combined with chemical fertilizers was helpful to the increase of the Labile Organic Matter. In each treatment, the contents of three fractions of LOM decreased in an order of HLOM〉 MLOM〉 LLOM, the LOM content of APK was the highest and LOM content of BN2 was the lowest. Besides, the soil LOM showed significant correlations with OM and CPMI.