【摘要】 根据内蒙古多伦县2005-2010年6年退耕还林地林下植被地上生物量与气候观测资料,对不同年际林下植被地上生物量变化以及与植被盖度、密度、高度、全年降水量等因子相关分析,建立了影响因子对林下植被地上生物量回归模型并进行预测分析。结果表明:不同年际退耕还林地林下植被地上生物量差异显著,生物量的变化随着退耕还林工程期的延长表现出明显的增加规律;退耕还林地林下植被地上生物量与退耕还林年际、植被的密度、高度具有较强的相关性,退耕还林年际越长,生物量越大;植物的密度、高度越大,生物量越大;退耕还林地林下植被地上生物量可由植被高度变化的线性关系说明与预测。更多还原

【Abstract】 Based on the aboveground biomass of undergrowth vegetation and climate observations in Duolun County from 2005 to 2010,the relationship of annual variation of aboveground biomass of undergrowth vegetation,vegetation cover,density,height and annual precipitation have benn analyzed.The regression model of aboveground biomass of undergrowth vegetation and its impact factor has been built.The result shows: The aboveground biomass of conversion of cropland to forest in different years is significantly different,biomass increases significantly as the increasing of the years of conversion of cropland to forest.The aboveground biomass of undergrowth vegetation in the area of conversion of cropland to forest has strong correlation with the years of conversion of cropland to forest,vegetation density and height.The biomass increases as the increasing of the years of conversion of cropland to forest,vegetation density and height.The aboveground biomass in the area of conversion of cropland to forest can be predicted by the linear relationship of variation of vegetation height.更多还原