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在辽宁省有水土流失发生的30个坡耕地采集60个表土层土样,除土壤的分散率和侵蚀率外,还测定了14项理化性质。结果表明,土壤分散率为24.70～72.34,侵蚀率为21.44～216.48,按分散率>46.92、侵蚀率>62.72者为易蚀土壤分类,60个土样中有20～30％属易蚀土壤,70～80％为抗蚀土壤。抗蚀性的主要决定因素是土壤质地。全省坡耕地土壤的抗蚀性指标北部低,东和东南部高,西北有增加趋势,主要受成土母质因素影响所致。目前辽东土壤侵蚀远较西部轻微,主要是与植被覆盖较好有关,一旦破坏,水土流失可能会更严重。
Sixty soil samples of topsoil were collected from 30 sloped farmlands where soil erosion occurred in Liaoning Province. In addition to soil dispersion rate and erosion rate, 14 physical and chemical properties were also measured. The results showed that the soil dispersion rate was 24.70-72.34 and the erosion rate was 21.44-216.48. According to the dispersion rate> 46.92 and the erosion rate> 62.72, it was classified as erodible soil. Among the 60 soil samples, 20-30% 70 ~ 80% for the erosion of soil. The main determinant of corrosion resistance is soil texture. The soil erosion resistance index of the sloping arable land in the province is low in the north, high in the east and southeast, and tends to increase in the northwest, which is mainly caused by the influence of the parent material factors of the soil. At present, soil erosion in Liaodong is slightly more than that in the west, mainly due to better vegetation cover. Once damaged, soil erosion may be more serious.