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本文研究结果表明，在高寒山区火烧土壤可加速有机质的分解，增加速效养分含量，因而使牧草产量大幅度提高。但3-4年后，因土壤速效养分含量明显减少，牧草产量又急剧下降。火烧对土壤酶破坏严重，火烧后3-4年，脲酶和蛋白酶活性可恢复到原来水平的50-80％，而碱性磷酸酶、过氧化氢酶和蔗糖酶活性可恢复到原水平的20-40％。但随着时间推移，土壤有机质积累和酶活性恢复有加速的倾向。在高寒山区，土壤酶活性与土壤有机质含量密切相关，与土壤速效养分含量和牧草产量无关，因而土壤有机质含量，土壤酶活性不能作为土壤肥力的标志。
The results of this study show that burning the soil in the alpine mountain region can accelerate the decomposition of organic matter and increase the content of available nutrients, so that the yield of forage grass is greatly increased. However, after 3-4 years, the yield of forage dropped sharply again due to the obvious reduction of available nutrient content in soil. Burning soil enzymes severely damaged, 3-4 years after fire, urease and protease activity can be restored to the original level of 50-80%, while the alkaline phosphatase, catalase and invertase activity can be restored to the original level of 20 -40%. However, with the passage of time, soil organic matter accumulation and enzyme activity recovery tend to accelerate. In the alpine area, soil enzyme activity is closely related to soil organic matter content, and has nothing to do with soil available nutrient content and forage yield, soil organic matter content and soil enzyme activity can not be used as a marker of soil fertility.