应用压力-容积技术测定3个防火树种的水分特征  

Water characteristics of three fire resistant tree species using pressure-volume (P-V) technique

作　　者：邹武[1] 温国胜[1] 徐贵艳[1] 周国模[1] 余树全[1] 

机构地区：[1]浙江林学院林业与生物技术学院,浙江临安311300

出　　处：《浙江林学院学报》2010年第1期76-80,共5页Journal of Zhejiang Forestry College

基　　金：浙江省重大科技专项重点项目(2006C12060);杭州市重大科技攻关项目(20052112A11)

摘　　要：此研究旨在研究防火树种的水分特性,为南方地区防火树种选择提供理论依据。应用压力-容积(P-V)分析技术测定了木荷Schima superba,秃瓣杜英Elaeocarpus galbripetalus和青冈Cyclobalanopsis glauca等3个防火树种春季、夏季和秋季的水分特征参数,即初始质壁分离点渗透势πp,饱和含水量时的最大渗透势π0,细胞弹性模数ξ,细胞质壁分离时的共质体水体积量与饱和时共质体水体积量之比Vp/V0。结果表明:①在不同季节中,木荷与青冈的4项水分特征参数变化趋势与范围相似,而与秃瓣杜英的相差较大;②通过比较3个树种的4项水分参数在3个生长季节的平均数,得出抗旱性排列顺序是青冈>木荷>秃瓣杜英。This objective is to provide a basis for chosen of fire resistant tree species in the southern area of China. Physiological indexes of drought-resistance, namely the four water parameters of osmotic potential at the turgor loss poiut（πp）, water potential at the water saturation point （π0）, bulk modulus of elasticity （ξ）, and the rate of bound water in cells （Vp/V0）, for the three fire resistant trees, Schima superba, Cyclobalanopsis glauca, and Elaeocarpus glabripetalus, were studied using the pressure-volume（P-V） technique. Averages of the four water parameters for the three species in three growing seasons（March-May, July-August, and October-November in 2008） were then compared. Results showed that （1） in different seasons, water parameters of S. superba and C. glauca had similar trends and ranges but were different from E. glabripetalus. Also, （2） drought resistance from averages of the water parameters was C. glauca 〉 S. superba 〉 E. glabripetalus. [Ch, 2 fig. 1 tab. 11 ref.]

关 键 词：森林生物学 压力-容积技术 防火树种 水分生理 抗旱性 

分 类 号：S678[农业科学—园艺学] S718.43