中国水土保持科学2017，Vol.15Issue(6)：73-80,8.DOI:10.16843/j.sswc.2017.06.009
静风下土壤水分胁迫的栓皮栎幼苗气候空间上限列线
Series lines of climate space up limit of Quercus variabilis seedlings in static wind and different soil water stress
摘要
Abstract
[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 moistures.[Methods] In the sunny weather conditions,controlling microclimate factor of wind speed under 0.2 m/s,and controlling different soil moisture conditions,the leaf and air temperature difference (LATD) of Q.variabilis seedlings were measured and the relation between LATD and the solar radiation were analyzed.Because leaf temperature index plus LATDs are leaf temperatures corresponding to different LATDs,the linear relation of LATD and the solar radiation was transformed into relation of leaf temperature and the solar radiation.According to the linear relation of leaf temperature and the solar radiation,leaf temperature increases with solar radiation increasing.This means solar radiation contracts climate space of Q.variabilis seedlings.Consulting D.M.Gates' climate space graphical method,overturn the regression line of leaf temperature and solar radiation,the SLCSUL of Q.variabilis seedlings were drawn.[Results] 1) The solar radiation was main factor of LATD,and LATD increased with solar radiation in clear and no wind weather.The relationship of LATD and solar radiation was remarkably linear relation.2) The slope of linear relation of LATD and solar radiation decreased with soil moisture increasing.3) In noon time,and in serious soil drought condition (soil moisture was 5％),the leaf temperature of Q.variabilis seedlings was 3℃ higher than in appropriate soil moisture condition.[Conculsions] We concluded that in different soil moisture conditions the leaf temperature of Q.variabilis seedlings increased with solar radiation increasing and the slope of LATD of different solar radiation decreased with soil moisture increasing.The LATD of different soil moisture changing with solar radiation was quite similar to the results of our former studies in different wind speed conditions,and it had the similar SLCSUL.Combining results of this paper with SLCSUL of different wind speed,the characteristics of climate space of Q.variabilis seedlings of 4 factors such as solar radiation,air temperature,soil moisture,and wind speed will be obtained.Therefore,the results of this paper may provide the basis for determining precise leaf temperature index of heat stress with multiple agro-meteorological factors.This paper enriches plant climate space theory and provides guidance for heat stress leaf temperature index determination of other plants,including crops,when multiple agro-meteorological factors are needed to be analyzed.关键词
栓皮栎/叶气温差/气候空间/太阳辐射/土壤容积含水量Key words
Quercus variabilis/LATD/climate space/solar radiation/soil moisture分类
农业科技引用本文复制引用
王谦,刘琳奇,王佩舒,曹静,陈景玲,张劲松,寇渊博..静风下土壤水分胁迫的栓皮栎幼苗气候空间上限列线[J].中国水土保持科学,2017,15(6):73-80,8.基金项目
国家自然科学基金“基于气候空间上限列线的栓皮栎幼苗高温叠加干旱胁迫机制研究”(31370621) （31370621）
国家自然科学基金“番茄叶片低温胁迫气象指标的气候空间列线研究”(31071321) （31071321）
