数字农科院2.0

Enhanced Wind Erosion Control by Alfalfa Grassland Compared to Conventional Crops in Northern China

文献类型： 外文期刊

作者： Qi Qin;Jiaguo Qi;Xiaoping Xin;Dawei Xu;Ruirui Yan

作者机构：

关键词： alfalfa grassland;cereal crops;RWEQ model;soil wind erosion;vegetation-covered days

期刊名称： Agronomy

ISSN： 2073-4395

年卷期： 2025 年 15 卷 2 期

页码：

收录情况： SCIE（2025版）

摘要： Wind erosion poses a significant challenge to agricultural sustainability in Northern China’s arid regions. This study investigated the effectiveness of alfalfa grassland versus conventional cropland in controlling wind erosion across nine study sites in three agroecological regions. Using Sentinel-2 satellite imagery and the Revised Wind Erosion Equation (RWEQ) model, we analyzed vegetation cover duration and quantified soil wind erosion from 2018 to 2020. The results showed that alfalfa grassland extended vegetation cover by 80 days annually compared to cropland, with most extension occurring in spring. Alfalfa grassland demonstrated superior erosion control, reducing soil losses by 50% (24.02 versus 50.70 t/ha/yr) and increasing soil retention threefold (1.52 versus 0.59 t/ha/yr) compared to cropland. The northwest region experienced the highest erosion rates, while management practices significantly influenced alfalfa’s soil conservation effectiveness. Multiple regression analysis revealed vegetation cover and annual precipitation as primary factors affecting wind erosion. These findings suggest integrating alfalfa into crop rotations could effectively enhance soil conservation in Northern China’s wind erosion-prone regions.

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