中国北方农牧交错带土壤风蚀时空分布

土壤风蚀是干旱、半干旱地区土壤退化的主要过程，定量评价土壤风蚀是分析土壤退化的重要手段。中国北方农牧交错带是土壤风蚀的典型治理区。采用张春来风蚀预报经验模型，以半月为步长，计算中国北方农牧交错带2000-2012年的土壤风蚀模数。结果表明：中国北方农牧交错带的土壤风蚀状况整体有好转；沙地的土壤风蚀最严重，农田次之，草地的土壤风蚀最低；土地利用方式、风速和植被盖度均对土壤风蚀有一定的影响。

Spatiotemporal distribution of soil wind erosion modulus in the agro-pastoral ecotone of north China

Soil wind erosion is one of the main processes of soil degradation in arid and semi-arid regions. Quantitative evaluation of soil wind erosion is an important measure to analyze soil degradation. The agro-pastoral ecotone of North China is a typical control area for soil wind erosion. In this paper, Zhang Chunlai wind erosion prediction empirical model is used to calculate the soil wind erosion modulus in the agro-pastoral ecotone of North China from 2000 to 2012, and the wind erosion modulus for every half a month were obtained. The results showed that soil wind erosion in the agro-pastoral ecotone of North China has improved overall. Wind erosion was the highest in sandy land, followed by farmland, and the lowest in grassland. Land use, wind speed and vegetation coverage had obvious influences on the magnitude of soil wind erosion.