土壤2011，Vol.43Issue(2)：174-178,5.
肃北高寒草原不同放牧强度土壤养分变化特征
Study on Contents of Soil Nutrients in Different Grazing Intensities on Subei Alpine Steppes
摘要
Abstract
Na, Fe, Mn, Cu and Zn contents in soil samples in 0-10, 10-20 and 20-30 cm layers in Subei alpine steppe were studied under four kinds of grazing intensities, i.e., no grazing, light grazing, middle grazing and high grazing. The results indicated that: 1) grazing intensity had consistent effect on soil physical, chemical and biological fertilities, which were associated with each other and determined the evolution direction of soil fertility; 2) With the increase of steppe grazing intensity, soil bulk density at both 0-10 cm and 10-20 cm layers increased, while soil porosity and moisture content decreased significantly, steppe grazing intensity influenced soil moisture content more strongly than soil porosity; 3) Soil organic matter and total N contents of light grazing steppes were higher than those of middle grazing and high grazing steppes, soil available N, P and K contents increased with thc increase of steppe standard of grazing intensity; 4) Thc nutrient content order was Na＞Fe＞Mn＞Cu＞Zn, they shared the same changing order, i.e., light grazing＞no grazing＞middle grazing＞high grazing; 5) With the increase of steppe grazing intensity, thc decreasing extent of soil nutrients was 10-20cm＞0-10cm ＞20-30cm.关键词
高寒草原/放牧强度/土壤养分/微量元素Key words
Alpine grassland/ Grazing intensity/ Soil nutrient/ Available trace clement分类
农业科技引用本文复制引用
杨红善,常根柱,周学辉,路远,那·巴特尔..肃北高寒草原不同放牧强度土壤养分变化特征[J].土壤,2011,43(2):174-178,5.基金项目
全球环境基金(GEF)项目(052456 CHA-GS-Y-2)和中央级公益性科研院所基本科研业务费专项资金项目(BRF100202)资助. （GEF）
