羊草气孔导度的Jarvis-类模型  

A Jarvis stomatal conductance model under considering soil moisture condition.

作　　者：牛海山[1] 旭日[2] 张志诚[3] 陈佐忠[4] 

机构地区：[1]中国科学院研究生院,北京100049 [2]中国科学院大气物理研究所,北京100029 [3]中国科学院地理科学与资源研究所 [4]中国科学院植物研究所,北京100093

出　　处：《生态学杂志》2005年第11期1287-1290,共4页Chinese Journal of Ecology

基　　金：国家自然科学基金资助项目(40205015)

摘　　要：在干旱半干旱气候条件下,土壤水分状况通常是决定植物气孔导度的重要因素,现有气孔导度模型Jarvis-类和耦合模型(或光合-导度模型)未充分考虑这一因素对气孔导度的影响.本文以Jarvis气孔导度模型为基础,提出一个充分考虑土壤水分状况因素的气孔导度模型.该模型对羊草连续两年(1998～1999)野外实地观测结果拟合良好(R2=0.603),预测能力较线性回归方程(R2=0.361)有明显提高.In arid and semi-arid area, soil moisture is a vital factor affecting plant stomatal conductance, but was ignored to some extent by most stomatal conductance models which were generally classified into two types, i. e., Jarvis-type and photosynthesis-conductance type. This paper presented a new model, which adopted the main structure of Jarvis-type and fully considered the importance of soil moisture condition, The stomatal conductance of Leymus chinensis, a dominant species of the typical steppe in Inner-Mongolian grassland, was predicted by the model during two growth seasons（1998-1999）, with a precision of R^2= 0.603, obviously higher than R^2= 0. 361 obtained by regression equations,

关 键 词：气孔导度 气孔导度模型 土壤水分 羊草 

分 类 号：S543.9[农业科学—作物学]