饲草是发展畜牧业的物质基础。随着人工草地建设的发展,多年生禾本科人工草场的产量不稳定,利用年限短,已成为高寒牧区人工草地建设中较为突出的问题。青海牧区海拔高,气温低,有机质分解缓慢,土壤有效养份缺乏,直接影响牧草的生物产量。因此,加速草原生态系统中氮素循环的规模和速度,无疑是提高草地生产力的重要措施。为了摸清青海牧区土壤养分供给状况以 Forage is the material basis for the development of animal husbandry. With the development of artificial grassland construction, the output of perennial grassland artificial grassland is unstable and its service life is short, which has become a prominent problem in the construction of artificial grassland in the alpine pastoral area. Qinghai pastoral areas of high altitude, low temperature, slow decomposition of organic matter, the lack of effective nutrients in the soil, a direct impact on pasture biological output. Therefore, accelerating the scale and speed of nitrogen cycle in grassland ecosystem is undoubtedly an important measure to improve grassland productivity. In order to find out the status of Qinghai pastoral soil nutrient supply