【摘要】：生物治理措施是土壤侵蝕防治3大措施之一,而土壤抗蝕性是評定土壤抵抗侵蝕能力的重要參數(shù),以第四紀(jì)紅壤為對象,對水保林、林草結(jié)合、果林清耕、撂荒裸地4種治理模式下土壤抗蝕性進(jìn)行了研究,結(jié)果表明:(1)不同生物治理模式下土壤抗蝕性差異明顯,土壤抗蝕指數(shù)表現(xiàn)為水保林林草結(jié)合果林清耕撂荒裸地,且同一治理措施上層土壤抗蝕性優(yōu)于下層土壤。(2)土壤抗蝕指數(shù)隨浸水時(shí)間的增加而減小,兩者呈三次函數(shù)關(guān)系。(3)運(yùn)用主成分分析方法,從13個(gè)土壤抗蝕性影響因子中提取出3個(gè)主成分,建立土壤抗蝕性綜合評價(jià)模型,在不同生物治理措施下適用良好。
[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.
【作者單位】： 河海大學(xué)水利水電學(xué)院;江西省水土保持科學(xué)研究院;
【基金】：國家自然科學(xué)基金(41401312)
【分類號】：S157

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