摘要
以25年树龄的挪威云杉树冠中部生长1年的小枝为测试材料,应用电子控温压力室,分别在15、20、25、30和35℃的恒温条件下进行PV分析所得到的水分参数表明;温度升高将引起π_0和π_p值下降,ROWC_(πp)和RWC_(πp)却几乎不受温度的影响;在不控温条件下应用Hammel逐渐升压法进行PV分析时,压力室温度比室温高1—2℃,所得结果与同样温度控温所测结果相似。在5—30℃不同温度条件下的植物组织吸水试验表明,在一定限度内升高温度可以增强植物组织的吸水量。
One year old branches of 25 years old Norway spruce are taken from middle layer of canopy,and their water parameters are measured in a pressure chamber electrically controlled at 15,20,25,30 and 35℃. Pressure-volume analysis indicates that high temperature will induce the decrease of π_0 and π_p values, and different temperature has little effect in ROWC_(πp) and RWC_(πp). Similar results are obtained using Hammel's method of gradually increasing pressure without temperature control. Tests of water absorption by plant tissues under 5—30℃ show that the water absorbing capacity increases with increasing temperature.
出处
《应用生态学报》
CAS
CSCD
1992年第4期302-307,共6页
Chinese Journal of Applied Ecology
关键词
温度
植物组织吸水
压力窖分析
Pressure-volume analysis, Temperature, Water parameter of plant, Water absorption of plant tissues, Picea abies.
