不同生物治理措施对赤红壤抗蚀性影响的研究

采用营造大叶相思水土保持林和种植荔枝、龙眼、杨梅等果树的措施治理严重退化赤红壤，对不同航对照的土壤抗蚀性研究，结果表明：采用不同生物措施治理后土壤抗蚀性大小顺序为：２７年生杨梅（Ｔ２３）；６年生大叶相思（Ｔ１２）、２８年生的荔枝（Ｔ２１）、龙眼（Ｔ２２）和６年生荔枝（Ｔ１１）。采用受蚀性指数ＥＶＡ、土壤有机质、结构体破坏率，大于１ｍｍ水稳性团粒含量以及侵率，能较好地表征赤红壤抗蚀性，在果园中引进以

A STUDY ON LATERITIC RED SOIL ANTIERODIBILITY UNDER DIFFERENT BIOLOGICAL TREATMENTS

The measures of afforesting soil and water conservation forest of Acacia auricalaformis and cultivating fruit trees of Iitchi chinensis, Euphoria longana,Myrica rubra were took to control soil erosion on the lateritic red soils of serious deterioration area. Antierodibility under different treatments and controls were studied, the results showed that the order of the soil antierodibility followed: Myrica rubra of 27 year-old(T₂₃);Acacia auricalaformis of 6 years-old (T₁₂), Iitchi chinensis and Euphoria longana of 28 year-old (T₂₁,T₂₂); Litchi chinensis of 6 year-old (T₁₁). Index of erodibility (F_VA), organic matter;>1mm water-stable aggregate composition, rate of structure deterioration, and erosion raito could be used to indicate the lateritic red soil antierodibility in this area. To introduce legume into orchard for increasing coverage is one of the effective measures to enable the combined effect of harness and development in seriously deteriorated lateritic red soil.