黄土高原沙棘林地土壤抗蚀性及其指标的研究

Study on Soil Anti-erodibility and Its Indices of Sea buckthorn Forest Land in Loess Plateau

通过对黄土高原沙棘资源较丰富的靖边、黄龙、麟游、秦安、交口等县土壤各种抗蚀性指标的测定与分析,得出不同土地类型土壤抗蚀性规律及抗蚀性主要影响因子的排序等外,认为水稳性团粒含量是黄土高原土壤的最佳抗蚀性指标,其次是风干率砂壤土除外,而以微团聚体含量为基础所表示的各种指标不能很好地反映该区土壤的抗蚀性。在地带上黄土高原由北而南抗蚀性递增。

Determination of various soil anti-erodibility and its indices in Jingbian, Huanglong, Linyou, Qin'an, and Jiaokou Counties where sea buckthorn are widely distributed were made and analyzed. The regularity of soil anti-erodibility on different land types and its order of main effective factors, were obtained. Besides the weter stable aggregate content is the best air-dry ratio (excluding sandy loam soil) is the next soil anti-erodibility index in eoess Plateau. Other indices based on microaggregate contents do not reflect precisely the soil anti-erodibility in this area. The soil anti-erodibility increases from north to south in the Loess Plateau.