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利用同位素示踪技术,对我国西南干热河谷草地土壤侵蚀模数进行研究,研究表明:在10°~56°坡度范围内,土壤侵蚀模数分布范围为820~2 418 t/(km2.a),样地土壤侵蚀模数M与坡度近似成正相关,M=34.64α+461,R2=0.94。现有草地植被覆盖率无法对土壤侵蚀产生有效控制。
Using isotope tracer technique, the soil erosion modulus of grassland in Southwest dry and hot valley was studied. The results showed that the soil erosion modulus ranged from 820 to 2 418 t / (km 2 .a) in the gradient of 10 ° ~ 56 ° ), And the soil erosion modulus M was positively correlated with the slope degree. M = 34.64α + 461, R2 = 0.94. Existing grassland vegetation coverage can not effectively control soil erosion.