中文摘要：

试验研究了藏北高寒牧区不同草场管理措施对高寒草地土壤养分的影响。结果表明,轮牧和禁牧均能有效地提高草场土壤有机质和全氮含量,围水肥（围栏、浇水和施肥）管理的土壤有机质含量相较围水（围栏和浇水）管理措施并没有显著提高,说明水分是藏北典型高寒草地生产力的主要限制因子;围水和围水肥管理措施能显著地提高0~10 cm土层土壤全氮含量;不同管理措施在土壤速效养分含量变化上差异不显著,高寒草原土壤养分的矿化过程还需进一步研究。

英文摘要：

This study focus on the impact of various grassland managements of alpine pastoral region in north of Tibet on the soil nutrient. The results show that the rotational grazing and forbidding grazing management can rise the soil organic matters and total nitrogen of grassland soil significantly, the insignificant rise of soil organic matters under taken measure of enclosure plus water and fertilizer compared with eclosure plus water, shows that water is the core constrainted factor in north Tibet typical alpine grassland productivity, enclosure plus water and enclosure plus water and fertilizer measures can rise the 0-10 cm soil total nitrogen significantly.In availabe nutrients aspect, various managements indicate insignificant differences, thus mineralization precesses in alpine steppe should be study further.