不同水保措施对土壤可蚀性K值的影响

The Effect of Different Water Conservation Measures on the K Value of Soil Erosion

以宁化水保科教园径流小区4种水保措施下土壤为研究对象,测定了表层土壤粒径与有机质组成,利用EPIC模型计算了土壤可蚀K性值。结果表明:研究区紫色土均处于高可侵蚀性土壤(K>0.35)。土壤可蚀性K值与土壤砂粒和粉粒存在显著显著相关(P<0.01),与黏粒无显著相关,与粉粒相关系数为0.965,与砂粒存在显著负相关,相关系数-0.962。不同水保措施下平均土壤可蚀性K值变化范围为0.403468~0.446236,差异不显著,变异程度较低,最大仅为5.2%。

The Study collected including conservation science park runoff plot of soil under the four kinds of soil conservation measures, the determination of runoff plots under the four kinds of soil conservation measures of surface soil mechanical composition and determination of organic carbon (TOC) analysis of soil erosion K value. The results showed that (1) Purple soil in the study area was in highly erosive soil (K>0.35). Soil K value was affected by soil particles and sand grains (P<0.01).(2) Soil K value was influenced by soil particles and sand grains (P<0.01), and the K value of soil was significantly correlated with soil particle size, and the correlation coefficient was 0.965, which was significantly negative correlation with sand grains, and the correlation coefficient was -0.962;(3) The variation range of K value in the study area was 0.403 468~0.446 236, and the difference was not significant under different water conservation measures, and the variation was low, with the maximum being 5.2%.