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本研究对低肥力红壤进行了１３年连续施用不同有机物料的改土效果试验。结果表明：有机物料对增加土壤有机复合体的数量作用显著，同时复合体的质量也有不同程度的提高。原土复合量的增加顺序是：猪粪＞红萍、稻草、绿肥＞对照。追加复合量的增加顺序是：猪粪＞红萍＞稻草＞绿肥。与此相反，由于猪粪的当季投碳量高而当季分解率低，因此猪粪的追加复合度则是最低的。有机物料有利于大团聚体的形成，酶活性的提高。过氧化氢酶活性提高了７０％～８０％，转化酶活性提高了２０％～４０％。红萍是投碳效率最好的有机物料之一。红萍主要改善土壤的氮供给；稻草主要改善土壤的钾供给；猪粪主要改善土壤的磷，其次是氮的供给。
In this study, soil fertility improvement experiments of 13 different years organic fertilizers were conducted on low-fertility red soils. The results show that the organic material has an obvious effect on increasing the amount of soil organic complex and the quality of the complex is also improved to some extent. The order of increase of original soil compound amount is: pig manure> Hongping, straw, green manure> control. The order of increase of compounding quantity is pig manure> red ping> straw> green manure. In contrast, supplementation of pig manure is the lowest due to the high season carbon sequestration of pig manure and the low seasonal breakdown rate. Organic material is conducive to the formation of large aggregates, enzyme activity increased. Catalase activity increased by 70% to 80%, invertase activity increased by 20% to 40%. Hongping is one of the best organic materials for carbon efficiency. Hongping mainly improves soil nitrogen supply; straw mainly improves soil potassium supply; pig manure mainly improves soil phosphorus, followed by nitrogen.