中文 
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供水对林木生理反应特性的影响
The Effect of the Supporting Water on the Characteristics of Forest Biologic Response
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摘要: 采用人工供水的方法,对油松、侧柏、刺槐进行1.5,1.0,0.5倍降水量的灌水处理,形成一定的土壤含水量样度,测定灌水后3树种的生理指标,结果表明:1.5,1.0,0.5倍灌水处理后,油松、侧柏、刺槐的净光合速率分别比对照提高60.2%,63.3%,25.0%;63.5%,27.9%,5.1%和57.7%,27.0%,4.9%。供水对油松的促进作用最为明显.生长季中,各树种的光合速率和蒸腾速率变化具有双峰型特点.油松、侧柏、刺槐在生长季中,1.5,1.0,0.5倍灌水处理及对照蒸腾速率平均为0.416×10-4,0.383×10-4,0.345×10-4,0.308×10-4 mol/g·s;0.352×10-4,0.322×10-4,0.302×10-4,0.227×10-4 mol/g·s和0.009,0.009,0.008,0.007mol/m2·s。各处理叶水势的测定表明:随土壤含水量的增大树木叶水势随之升高,且油松的水势高于侧柏,但各处理间变化较小。Abstract: Plants of Pinus tabulaeformis,Platycladus orientalis and Robinia pseudoacacia were irrigated by supporting 1.5,1.0,0.5 times of precipitation to form soil water steps.It was showed that the net photosynthetic rate of P.tabulaeformis,P.orientalis,R.pseudoacacia was increased by 60.2%,63.3%,25.0% and 63.5%,27.9%,5.1% and 57.7%,27.0%,4.9% than those of controls respectively in treating of 1.5,1.0,0.5 times precipitation.The change of photosynthetic rates and transpiration rates appeared two peaks.In growing season,the average transpiration rates of P.tabulaeformis,P.orientalis,R.pseudoacacia are 0.416×10-4,0.383×10-4,0.345×10-4,0.308×10-4 mol/g·s;0.352×10-4,0.322×10-4,0.302×10-4,0.227×10-4 mol/g·s;0.009,0.009,0.008,0.007 mol/m2·s in 1.5,1.0,0.5 times and control.The test showed that the leaf water potential increased along with the soil water,and the leaf water potential of P.tabulaeformis was higher than that of P.orientalis.
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