HUMAN DISTURBANCES ON MIRE AND PEAT SOILS IN THE ZOIGE PLATEAU
人类活动干扰对若尔盖高原沼泽土、泥炭土资源影响的研究

Proved the deterioraton and quality decline of mire and pea t soils were caused by human activities in the Zoige Plateau according to data o btained from field survey and chemical analysis of soils. Human induced serious damage of soil environment is mainly reflected in the following aspects: success ive degeneration process of mire and peat soils occurred from mire soil or peat soil to meadow soil or aeolian sandy soil; marked drop of soil fertility, espect ially the contents of organic matter, total nitrogen (N) and total phosphorus (P ). Under weak disturbance of human activities, the rapid available contents of N and P increase slightly, and the rapid available potassium (K) content decrease s. Under situation of strong disturbance of human activities, the total contents of N and P as well as rapid available contents of N, P and K reduce, but the to tal K increases. Following the human disturbances, content of humid acid of peat content decreases, and the decomposition rate of peat and pH of surface soil i ncrease obviously. Soil water drainage and excessive grazing in pastureland of m ire and peat soils are accountable for the deterioration and quality decline of mire and peat soils.