内蒙古多伦县沙质草地植被波动研究

Vegetation Fluctuation of Sandy Meadow in Duolun County of Inner Mongolia

以多伦县沙质草地植被为研究对象,在2004～2010年间调查了植被的群落盖度、群落高度、密度和生物量等特征值,并采用专家权重法构建植被波动强度公式,分析多伦县沙质草地植被变化情况。结果表明:正向波动以2004年最大,波动强度为0.412,是植被生长最好的一年;负向波动最大的是2008年,波动强度为-0.430,是植被生长最差的一年。结合前期降雨量数据,发现植被波动强度曲线与降雨量曲线基本一致,表明植被波动曲线能较好地反映研究区的植被生长情况,但植被波动强度公式中的权重有待进一步研究。

This article choose sandy meadow vegetation in Duolun County as the research object to investigate characteristic value of vegetation（including coverage,height,density and biomass of community） during 2004～2010,and a formula of fluctuation intensity was built by using the method of expert weighting to analyze vegetation changes of sandy meadow in Duolun County.The results showed that the biggest positive fluctuation intensity was 0.412 in 2004,when was the best year for vegetation growth during study periods;the maximum negative fluctuation intensity was-0.430 in 2008,when was the worst year for vegetation growth during study periods.Combining of early rainfall data with these results,it was found that the curve of vegetation fluctuation intensity and the curve of rainfall were basically the same.Therefore the curve of vegetation fluctuation intensity could indeed reflect the vegetation growth in research area,but it needs further research and discussion to determine the weight in formula of vegetation fluctuation intensity.