草业学报2016，Vol.25Issue(6)：1-12,12.DOI:10.11686/cyxb2015402
内蒙古草地地下生物量空间格局分析
Spatial interpolation analysis of grassland below-ground biomass in the Inner Mongolia Autonomous Region,China
摘要
Abstract
This study combines survey data on the below-ground biomass of 198 grassland plots in the Inner Mongolia Autonomous Region with remote sensing and meteorological data.Correlation and regression analy-ses have been conducted between the recorded below-ground biomass and elevation,annual average tempera-ture,precipitation,≥10℃ annual accumulated temperature,moisture index and NDVI (normalized difference vegetation index).Based on the regression equation,a single factor interpolation was undertaken using the ArcGIS platform,with different weights assigned to different factors based on the degree of fit between the predicted results of the interpolation and the measured results.In terms of the weighted superposition of val-ues,the integrated underground biomass interpolation is graphed as a 1 km×1 km grid.The results show that the average below-ground biomass of grasslands in the Inner Mongolia Autonomous Region is 1364.06 g/m2 . The below-ground biomass of temperate steppe is the highest (1916.64 g/m2 )while that of temperate desert is the lowest (80.39 g/m2 ).There is a significant correlation between below-ground biomass and annual average temperature,precipitation,≥10℃ annual accumulated temperature,moisture index,and NDVI in the Inner Mongolia district.In terms of spatial pattern,the below-ground biomass of grasslands shows a decreasing trend from northeast to southwest,with the highest scores in the east of Hulunbeir League and Xilin Gol League and the lowest scores in Alxa League.This study demonstrates the value of the spatial interpolation of data on below-ground vegetation biomass in Inner Mongolia grasslands,with a forecast accuracy of 66.62%.关键词
地下生物量/插值/空间格局/草地/内蒙古Key words
below-ground biomass/interpolate/spatial pattern/grassland/Inner Mongolia引用本文复制引用
乔宇鑫,朱华忠,钟华平,伍兆文,孟雷,周李磊..内蒙古草地地下生物量空间格局分析[J].草业学报,2016,25(6):1-12,12.基金项目
国家科技基础性工作专项（2012FY111900-2，2011FY110400-3），国家科技基础条件平台－地球系统科学数据共享平台（2005DKA32300），北京市大学生科学研究与创业行动计划项目（2015bj021）和国家自然科学基金（J1103520）资助。 （）
