An Hui, Yang Xin-Guo, Liu Bing-Ru, Li Xue-Bin, He Xiu-Zhen, Song Nai-Ping
Ministry of Education Key Laboratory of Restoration and Reconstruction of Degraded Ecosystem in North-western China/United Center for Ecology Research and Bioresource Exploitation in Western China, Ningxia University, Yinchuan 750021, China.
Ying Yong Sheng Tai Xue Bao. 2011 Dec;22(12):3145-9.
By the method of substituting temporal serial with spatial serial, and taking five abandoned cultivated lands with different ages (1, 4, 9, 12, and 20 years) in desert steppe region as test objects, this paper studied the change characteristics of plant community biomass and soil nutrients during vegetation succession. With the increasing abandoned years, the plant community aboveground biomass on the abandoned lands increased after an initial decrease, whereas the total nitrogen, total phosphorus, organic carbon contents, and carbon density in 0-60 cm soil layer increased first, decreased then, and increased again, with the maximum values of soil total nitrogen and phosphorus contents appeared on the abandoned lands with the ages 4 and 20 years. During vegetation succession, the effects of soil total nitrogen and organic carbon on plant community biomass were greater than those of soil total phosphorus and soil bulk density.
采用时间序列替代空间序列的方法，以荒漠草原区5块不同弃耕年限（1年、4年、9年、12年和20年）的弃耕地为研究对象，研究了植被演替过程中植物群落生物量和土壤养分的变化特征。随着弃耕年限的增加，弃耕地上植物群落地上生物量先减少后增加，而0—60 cm土层的全氮、全磷、有机碳含量和碳密度先增加、后减少、再增加，土壤全氮和全磷含量的最大值分别出现在弃耕4年和20年的地块上。在植被演替过程中，土壤全氮和有机碳对植物群落生物量的影响大于土壤全磷和土壤容重。
