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通过对油松林、锐齿栎林、草丛等不同植被类型下土壤物理性质研究表明 :土壤形成发育过程中 ,森林群落改善土壤物理性质的作用明显大于草本群落 ;阔叶林对土壤物理性质的改善作用强于针叶林。在 0～ 1 0 cm土层深度 ,>5 mm粒级的水稳性团聚体含量的增量锐齿栎林为 2 7.8% ,油松林为 1 4.0 % ,草丛为 5 .7% ;1～ 2 mm粒级的土壤水稳性团聚体含量的增量锐齿栎林为 6.0 % ,油松林为 1 1 .1 % ,草丛 8.6%。森林植被增加直径 >5 mm和 2～ 5 mm粒级土壤水稳性团聚体的作用明显
Through the study of soil physical properties under different vegetation types such as Pinus tabulaeformis, Quercus aliena and grassland, the results showed that: the role of forest community in improving soil physical properties was significantly greater than that in herbaceous communities during the process of soil formation and development; the improvement of physical properties of broad-leaved forests Stronger than coniferous forest. In the depth of 0 ~ 10 cm soil layer, the increment of water stable aggregates content of> 5 mm grain size was 2 7.8% for Pinus tabulaeformis forest, 1.04% for Pinus tabulaeformis forest and 5.7% for grass layer; Increases in soil water-stable aggregates at grain size of 2 mm were 6.0% for the sharptooth oak forest, 11.1% for the Pinus tabulaeformis forest and 8.6% for the grass. The effect of adding water-stable aggregates of particle-sized soil with diameter> 5 mm and 2 ~ 5 mm to forest vegetation was obvious