黄土高原沙棘林地土壤抗蚀性及其指标的研究

通过对黄土高原沙棘资源较丰富的靖边、黄龙、麟游、秦安、交口等县土壤抗蚀性指标的测定与分析,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。

Study on Erosion Resistance of Soil and Its Indexes on the Forestland of Common Seabuckthorn on the Loess Plateau

Through determining and analysing the indexes of resistance against erosion of the soil in counties of the Loess Plateau such as Jingbian, Huanglong, Linyou, Qinan and Jiaokou etc. with rich common seabuck-thorn resources, the authors consider that the content of water-stable aggregate is the best Index which re-flects erosion resistance of the soil on the Loess Plateau. The second is the degree of air-dryness in the soil (except the sandy loam). All kinds of indexes represented basically by the content of micro-aggregate can not exactly reflect the resistance to erosion of the soil in the area. It is found also that the resistance to ero-sion of the soil on the Loess Plateau increases from north to south.