风蚀强度的空间差异及影响分析

Spatial Difference of Wind Erosion Intensity and Impact Analysis

在丘陵连绵起伏的内蒙古后山地区,风蚀观测试验表明,在丘陵上存在风蚀强度的空间差异,这种差异进一步造成土壤质地、土壤肥力、生物量的空间差异。丘陵顶部和北坡上部是强烈风蚀部位,南坡相对较轻,风蚀量从丘陵顶部到坡面下部递减。在丘陵的顶部,风蚀强度大,土壤容重大,土壤肥力低,农业生产力也低。在丘陵的南坡,风蚀相对较轻,土壤容重较小,土壤肥力相对较高,农业生产力也高。在丘陵的北坡,风蚀比较严重,肥力比较低。了解这种差异为风蚀综合治理提供了科学依据。

The tests for observing wind erosion in field show that there exists spatial difference of wind erosion intensity in Housan area of Inner Mongolia with rolling hills. This difference affects the spatial difference of soil texture, soil fertility and arable land biomass. Wind erosion gradually decreases from the top to the foot of hill. On the top of hill, wind erosion intensity is very high, soil bulk density very big, soil fertility low, and agricultural productivity also low. In the south slope of hill, wind erosion intensity is comparatively low, soil bulk density low, soil fertility very comparatively high, and agricultural productivity also high. In the north slope of hill, wind erosion is very serious, and soil fertility is low. Understanding this spatial different will provide scientific reference for synthetically ecological treatment.