论文部分内容阅读
通过对红壤坡地不同土地利用方式土壤肥力及土地生物生产力的空间分异研究，揭示了土壤侵蚀对土壤肥力和土地生产力的负面影响．即侵蚀导致Ｎ、Ｐ、Ｋ等土壤速效养分含量减少及其在坡面上部的相对贫乏和下部的相对富集；土壤有机质含量降低；土壤机械组成中砂、粉、粘粒比率发生变化，表现为土壤沙化，土地生物生产力下降．
Based on the spatial variability of soil fertility and biological productivity of different land use types on red slope, the negative impact of soil erosion on soil fertility and land productivity was revealed. Erosion led to soil N, P, K and other soil available nutrient content and the relative decline in the upper part of the slope and the relative enrichment of the lower part of the soil organic matter content decreased; soil mechanical composition of sand, powder, clay ratio changes, the performance For soil desertification, the biological productivity of land decreases.