浙江农林大学学报2012，Vol.29Issue(1)：35-40,6.
浙江省8个树种的秋季水分特性
Autumnal water features of eight tree species in Zhejiang
摘要
Abstract
To determine the value of photosynthetic rate (Pn), transpiration rate (Tr) , and water feature parameters [osmotic potential at turgorloss peint (πP) , water potential at water saturation point (π0), (rate of bound water in cell) (VP/V0), relatire content of water (CRW), and bulk modulus of elasticity (ξ) ] of eight tree specieS, namely Schima superba, Castanopsis sclerophylla, Lithocarpus glabra, Lithocarpus harlandii, Photiniaserrulata, Loropetalum chinense var. Rubrum, Podocarpus nagi, and Elaeocarpus sylvestris, in the Zhejiang hilly area during autumn, a Li-Cor (Li)-6400 photosynthesis system, a pressure chamber, and pressure- volume (P-V) technology were utilized. A correlation analysis of the parameters was conducted. Results of the correlation analysis showed significant (P < 0.05) relationships between VP/V0 and g(r = 0.809), VP/V0 and π0 (r = -0.732) , Vp/V0 and πp (r = 0.801). The highest peak water use efficiency (WUE) was found in S. Superba (28.52 mmol·mol-1) and the lowest with C. Sclerophylla (12.92 mmol·mo1-1). The highest water use efficiency per day was with Lithocarpus glabra (10.44 mmol·mol-1) , where as the lowest was for C. Sclerophylla (4.03 mmol·mol-1). Comparing the five water parameters, the order of water absorption capacity was S. Superba > Loropetalum chinense var. Rubrum > Lithocarpus harlandii > C. Sclerophylla > Lithocarpus glabra > E.sylvestris > Photinia serrulata > Podocarpus nagi; whereas the order of dehydration tolerance was S. Superba > Loropetalum chinense var. Rubrum > Lithocarpus harlandii > C. Sclerophylla > Lithocarpus glabra > E. Sylvestris > Photinia serrulata > Podocarpus nagi.关键词
植物学/水分利用率/压力-容积技术/水分特性Key words
botany/ water use efficiency (WUE)/ pressure-volume (P-V) technology/ water features分类
农业科技引用本文复制引用
张俊,温国胜,张明如,刘欣欣..浙江省8个树种的秋季水分特性[J].浙江农林大学学报,2012,29(1):35-40,6.基金项目
浙江省科学技术攻关项目(2008C32021) （2008C32021）
浙江省自然科学基金资助项目(Y307525) （Y307525）
浙江省科学技术面上项目(2009D70022) （2009D70022）
