关键词: 退化红壤, 轻组有机碳, 颗粒有机碳, 植被恢复过程, 碳转化速率常数, 马尾松林

Abstract: This paper deals with variation of agrolandscape pattern in Daka village,Xishuangbanna,China with following indices:① number and size of patches,② indices of patch isolation and fragmentation,③ indices of landscape diversity,dominance,and evenness,④ landscape coefficient.The result showed that the mean patch size of forest and grassland community decreased while that of the cash crop garden increased.The indices of isolation for forest and cash crop garden community increased decreaged while that for the grassland decreased.Correspondingly,the index of landscape dominance decreased while the diversity and evenness increased from 1.4173 and 0.6450 to 1.4595 and 0.6642 repectively.The land utilization coefficient index increased from 191.4 to 238.3 throughout after 14 years.

Key words: degraded red soil, light fraction organic carbon, particulate organic carbon, process of vegetation restoration, rate constant for C transfer (k), Pinus massoniana plantation.