【摘要】 以贵州省1996年～2005年两期森林资源连续清查资料为基础,利用主要森林类型的蓄积量―生物量转换函数,估算该10年内贵州省各种林地的生物量,分析了主要森林类型分布格局和生物量的时空变化特征及其与喀斯特地貌的相关性。结果表明:1996年～2005年期间,贵州省林业用地面积净增7.68×105hm2,总生物量由2.58×108t增长到3.43×108t,10年间增加了0.85×108t,其中,喀斯特地区的林地增长和非林地减少幅度均高于非喀斯特地区。林种组成方面,防护林及特用林面积大幅增加,用材林、炭薪林等面积则急剧降低,防护林生物量在喀斯特和非喀斯特地区均大幅度提高,其他林种的生物量变化不明显。除极少数特例外,喀斯特森林的蓄积量及生物量均较非喀斯特地区低。更多还原

【Abstract】 Based on the continuous forest inventory data of 1996-2000 and 2001-2005 in Guizhou Province,we estimated the biomass of different forest types in the two periods using the volume-biomass transfer function of the major forest types.Changes of forest spatial and temporal distribution and biomass in the two periods as well as their relationships with Karst landform and rocky desertification level were further analyzed.These provide the background information of productivity maintenance mechanism and adaptive the ecological restoration and desertification control in Karst areas.Results showed that between late 1990s and early 2000s,the forest land area increased 7.68?105hm2.Total biomass increased from 2.58?108 t to 3.43?108 t.A total increment of 0.85 billion ton was obtained during these ten years.The area of forest types was changed too.The shelter forest and special-purpose forest were substantially increased in their areas;while the area of timber forest and fuel wood forest was drastically reduced.Karst landform and rocky desertification have positive correlations with forest volume and biomass.Karst forest biomass is lower than non-Karst forests.The rocky desertification in Karst area is more serious than non-Karst area.更多还原