不同生物治理模式下红壤抗蚀性变化特征及其影响因素

发布时间：2019-06-21 11:39

【摘要】：生物治理措施是土壤侵蚀防治3大措施之一,而土壤抗蚀性是评定土壤抵抗侵蚀能力的重要参数,以第四纪红壤为对象,对水保林、林草结合、果林清耕、撂荒裸地4种治理模式下土壤抗蚀性进行了研究,结果表明:(1)不同生物治理模式下土壤抗蚀性差异明显,土壤抗蚀指数表现为水保林林草结合果林清耕撂荒裸地,且同一治理措施上层土壤抗蚀性优于下层土壤。(2)土壤抗蚀指数随浸水时间的增加而减小,两者呈三次函数关系。(3)运用主成分分析方法,从13个土壤抗蚀性影响因子中提取出3个主成分,建立土壤抗蚀性综合评价模型,在不同生物治理措施下适用良好。
[Abstract]:Biological control measures are one of the three major measures to control soil erosion, and soil corrosion resistance is an important parameter to evaluate soil erosion resistance. Taking Quaternary red soil as the object, the soil corrosion resistance under four treatment modes of soil conservation forest, forest and grass combination, fruit forest clear farmland and abandoned bare land was studied. the results showed that: (1) there were obvious differences in soil corrosion resistance under different biological treatment modes. The soil erosion resistance index showed that the soil erosion resistance index decreased with the increase of soaking time, and the soil erosion resistance index decreased with the increase of soaking time. (3) three principal components were extracted from 13 soil corrosion resistance influencing factors by principal component analysis method, and the comprehensive evaluation model of soil corrosion resistance was established by using the principal component analysis method, and the corrosion resistance of the upper layer soil was better than that of the lower layer soil by the same treatment measure. (3) the soil erosion resistance index decreased with the increase of soaking time. (3) the principal component analysis method was used to extract 3 principal components from 13 soil corrosion resistance influencing factors, and the comprehensive evaluation model of soil corrosion resistance was established. It is well applied under different biological control measures.
【作者单位】：河海大学水利水电学院;江西省水土保持科学研究院;
【基金】：国家自然科学基金(41401312)
【分类号】：S157

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