土壤水分胁迫下苗木水分参数变化的研究

应用压力室法和压力与容积相关曲线技术，测定和分析了山杏，山桃，山合欢，黄连木、君迁子、石榴的盆栽苗木在不同土壤水分胁迫条件下的有关水分参数的变化。结果表明，苗木叶水势与蒸腾速率呈指数关系，与土壤含水量呈双曲线关系。各水分参数都与苗木保持膨压能力有关，６个供试树种中，君迁子和山杏保持膨压的能力较强，石榴和山桃次之，山合欢和黄连木较弱。

Studies On Changes of Water Parameters in Nursery Stock under Soil Water Stress

with the Pressure-Volume technigue,this paper presents a study on the changes of water parameters,in Prunus davidiana,Prunus armeniaca,Albzia mecrophylla,Pistacia chinensis,Diospyros lotus,Punica granatum under various soil water potential.The results show that there is a good exponential relation(Y=Ae BX ) between leaf water potential and soil water potential,a exponential relation between leaf water potential and transpiration,a hyperbola relation(Y=A B/X) between leaf water potential and soil water content.All the parameters investigated in our study are related to the abilities to keep turgor of the nursery stock . Of the 6 testing species ,Diospyros lotus and Prunus davidiana could keep turgor better,Punica granatum and Prunus armeniaca were good,Albizia Macrophylla and Pistacia chinensis had a relative poor capability.