露天开采背景下锡林浩特市产草量时空变化及对气象因子的响应

Spatiotemporal Variation of Herbage Yield and Its Response to Meteorological Factors in Xilinhot under the Background of Open-Pit Mining

基于1991~2016年7个时期的Landsat遥感影像、野外植被调查数据和同期的气象数据,采用GIS技术和相关分析方法,对露天开采背景下的锡林浩特市产草量时空动态进行分析,并探讨产草量对气象因子的响应。结果表明:研究区产草量整体呈减少趋势,存在一定的退化风险;产草量分布具有明显的空间差异性,东部产草量较高。在三种主要土地利用类型中,草地在不同时期产草量均为最高,但总体呈减少趋势,而工矿仓储用地与城市用地产草量均呈增加趋势。研究区整体、草地以及城市用地的产草量与年降水量均存在极显著的正相关性,但工矿仓储用地产草量与年降水量没有显著的相关性;研究区产草量和年均气温没有显著相关性。

Based on Landsat remote sensing images,field vegetation survey data and meteorological data of the same period from 1991 to 2016,GIS technology and correlation analysis method were used to analyze the temporal and spatial dynamics of grass yield in Xilinhot under the background of open-pit mining,and to discuss the response of grass yield to meteorological factors.The results showed that the grass yield in the study area showed a decreasing trend,and there was a certain risk of degradation.There were obvious spatial differences in the distribution of grass yield,and the eastern part had higher grass yield.Among the three main land use types,the grass yield of grassland was the highest in different periods,but showed a general decreasing trend,while the grass yield of industrial,mining and warehousing land and urban land showed an increasing trend.There was a significant positive correlation between grass yield and annual precipitation in the whole study area,grassland and urban land,but there was no significant correlation between grass yield and annual precipitation in industrial,mining and storage land.There was no significant correlation between grass yield and average annual temperature.