[Background] The Series Lines of Climate Space Up Limit( SLCSUL) of Quercus variabilis seedlings are important characteristics which may reflect more accurate temperature index of heat stress of high temperature. We had determined the serial lines of climate space of Q. variabilis seedlings in conditions of fully water supplied and different wind speeds. In this study we explored the leaf temperature of Q. variabilis seedlings changing with solar radiation,air temperature in condition of different soil mois...