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在ＰＥＧ（６０００）模拟土壤干旱胁迫条件下，应用ＰＶ技术测定了南方四种针叶树幼苗多项水分参数（Ψ０π、Ψ１００π、ＲＯＷＣ°、Ｖａ、εｍａｘ）的变化，通过对各参数的分析及综合比较表明，在水分胁迫条件下，各树种均有一定的渗透调节和保持膨压能力，但不同树种间存在显著差异，其中马尾松表现最好，火炬松其次，杉木和水杉较差。
The changes of water parameters (Ψ0π, Ψ100π, ROWC °, Va, εmax) of four southern coniferous seedlings were determined by PV technique under PEG (6000) simulated soil drought stress. Through the analysis of the parameters and comprehensive comparison The results showed that under water stress conditions, all species had some osmotic adjustment and turf capacity, but there were significant differences among different species, of which Pinus massoniana performed best, followed by Pinus taeda, and fir and Metasequoia.