生态学杂志2011，Vol.30Issue(4)：643-649,7.
准噶尔盆地南缘"丰收林"胡杨水势
Water potential of Populus euphratica in a'foison forest'at south edge of Junngar Basin
摘要
Abstract
Taking the Populus euphratica in Corps 150 ‘foison forest’ at south edge of Junngar Basin as test object, and by comparing it with Haloxylon ammodendron and Tamarix ramosissima, this paper studied the change characteristics of water potential of P. euphratica in arid environment, and analyzed the relationships of these change characteristics with soil moisture and air temperature and humidity. The diurnal variations of P. euphratica leaf and stem water potential presented “V” type, while those of H. ammodendron and T. ramosissima's were in “W”type. For elder P. euphratica, its leaf- and stem water potential was significantly negatively correlated with air temperature (r=-0. 839 and -0. 818, respectively); for young P. euphratica,its leaf water potential was positively correlated with air humidity ( r= 0. 786 ) , and its stem water potential was significantly negatively correlated with air temperature (r=-0. 650 ). In the moming, the water potential of elder P. euphratica leaves and stems at height 2 m was significantly different fiom that of the leaves and stems at heights 5 m and 10 m ( P＜0.05 ) , but no significant difference was observed for the leaves and stems at heights 5 m and 10 m (P＞0.05). At noon,the water potential of elder P. euphratica leaves and stems at heights 2 m, 5 m, and 10 m all had significant differences (P＜0.05); at 20:00, the water potential of the leaves at all heights had significant differences ( P＜0.05 ).关键词
胡杨/水势/干旱条件/准噶尔盆地南缘分类
农业科技引用本文复制引用
占东霞,庄丽,李卫红,徐智全,田中平..准噶尔盆地南缘"丰收林"胡杨水势[J].生态学杂志,2011,30(4):643-649,7.基金项目
国家自然科学基金项目(31060062,110140101)和石河子大学项目(Q9yy200814,SM05010)资助. （31060062,110140101）
