侵蚀环境退耕撂荒地植被恢复中土壤生物学特性演变

采用时空互代法,以侵蚀环境不同退耕年限撂荒地为研究对象,分析了其土壤微生物量与其相互关系及呼吸强度等土壤生物学性质演变特征.结果表明,退耕撂荒地植被恢复演替中,土壤生物学性能在10年左右便可以得到基本恢复,土壤微生物量碳(C)、氮(N)、磷(P)含量随演替进展均呈逐渐增加的趋势,且它们之间具有显著的线性正相关关系,土壤呼吸强度也随演替进展而呈对数函数增长趋势.

Evolution of Soil Biological Characteristics of Abandoned Croplands in Erosion Environment during the Vegetation Recovery Process

The abandoned croplands with different years in erosion environment were selected to study the evolution feature of soil biological characteristics by analyzing soil microbe biomass and soil respiration intensity.The results show that the soil biological capacity of the abandoned cropland can be basically recoverd in about ten years during its vegetation recovery process,the C,N and P content of soil microbe biomass raises gradually with development of natural evolution and there is a significant positive correlation between the content and natural evolution development,and the soil respiration intensity raises in logarithm function with development of natural evolution also.