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本研究以华北平原的潮土为对象,以5%的比例施用秸杆、马粪和猪粪、进行了盆钵培养试验,培养一年的结果表明:1.施用有机物料使0.25～0.05mm 粒级的微团聚体增加;0.05～0.01mm 粒级减少;<0.01mm 各粒级变化相对较小。随微团聚体粒径变小,其易氧化有机质和有机质含量有增加的趋势。施用有机物料使各粒级微团聚体中的有机质和易氧化有机质增加,并以>0.01mm 粒级的易氧化有机质增加较多。2.施有用机物料使土壤对磷的吸持能力降低,各有机处理中以猪粪降低的能力最强。>0.01mm 的微团聚体吸持磷的能力远较<0.01mm 者小。施用有机物料后,<0.01mm 粒级,尤其<0.005mm 粒级的微团聚体对磷的吸持能力提高,而>0.01mm者吸持磷的能力下降。
In this study, the alluvial soil in the North China Plain as the object, the straw, horse manure and pig manure were applied at the rate of 5%, and the pot experiment was conducted. The results of cultivation for one year showed that: 1. Particle size of microaggregates increased; 0.05 ~ 0.01mm grain size decreased; <0.01mm each grain size changes relatively small. With the smaller size of microaggregates, the content of organic matter and organic matter tends to increase. The application of organic materials increased the organic matter and readily oxidizable organic matter in each fraction of microaggregates and increased more readily oxidizable organic matter with a particle size> 0.01 mm. 2. Use of organic materials to reduce soil phosphorus holding capacity, the reduction of pig manure in the best organic processing. Microaggregates> 0.01 mm are far less capable of absorbing phosphorus than <0.01 mm. After the application of organic materials, <0.01mm particle size, especially <0.005mm particle size microaggregate ability to increase the holding capacity of phosphorus, and> 0.01mm ability to hold phosphorus decreased.