内蒙古典型草原黄囊苔草生长动态对气象因子的滞后响应分析

在全球变化与陆地生态系统关系的研究中,气候和植被相关关系的研究具有非常重要的意义。本文以2014年内蒙古草原生态系统定位站提供的气象数据资料为基础,运用灰色相对关联度以及含有时滞参数的灰色系统模型,分析了内蒙古典型草原区域尺度黄囊苔草(Carex korshinskyi)地上生物量对6种气象因子的响应。结果表明:黄囊苔草对6种气象因子的响应均有滞后效应。黄囊苔草地上生物量对降水量、气温、地温、蒸发量、相对湿度、日照时数的响应分别滞后10,16,16,10,15,5d。此结果将有助于更加深入理解气象因子对植物群落的影响机制,并为草地植被生产力建模与定量预测提供信息基础,以期在实践应用中发挥更高的价值。

The Lag Response of the Growth Dynamics of Dominant Grasses to Meteorological Factors in Typical Steppe of Inner Mongolia

The interaction of climate and vegetation affects the surface vegetation coating.According to the meteorological data in 2014 provided by Inner Mongolia grassland ecosystem research station,the response of advantage species biomass in typical steppe of Inner Mongolia grassland to six meteorological factor was studied in small regional scale using grey relational degree analysis and containing time delay parameters of grey system GM (1,N | τ) model.The results showed that the response of Carex lanceolata to six meteorological factors had hysteresis effect.The responses of aboveground biomass to the precipitation,temperature,ground temperature,evaporation,relative humidity and sunshine hours were 10,16,16,10,15,5 d,respectively.This result will help us to understand the mechanism of meteorological factors on plant community,and provide the base information for grassland vegetation productivity modeling and quantitative forecasting,so as to play a higher value in practical application.