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在人工气候室和温室条件下,控制不同土壤干旱梯度,应用PV技术研究了1～3年生油松、侧柏、栓皮栎、元宝枫、刺槐,白蜡、紫穗槐、沙棘和黄栌等9个树种的水分参数(Ψπ100,Ψo,εmax,TW/DW,Va等)及其在耐旱中的意义.结果表明,在干旱胁迫条件下,所有供试树种都具有保持一定膨压的能力,但其渗透调节的幅度仅为0.40～1.10MPa,而且膨压(Ψp)与细胞弹性模量(e)的关系是因树种而异的.
Under the conditions of artificial climate chamber and greenhouse, different soil drought gradients were controlled. Nine years of Pinus tabulaeformis, Platycladus orientalis, Quercus variabilis, Acer negundo, Robinia pseudoacacia, Ash, Amorpha fruticosa, Hippophae rhamnoides, The water parameters (Ψπ100, Ψo, εmax, TW / DW, Va, etc.) of tree species and their significance in drought tolerance were studied.The results showed that under drought stress, all tested species had the ability to maintain some turgor pressure, The osmotic adjustment range is only 0.40 ~ 1.10MPa, and turgor pressure (Ψp) and cell elastic modulus (e) relationship is tree-specific.