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以半湿润区、半干旱区和半干旱向干旱过渡区沙地上栽培的１４～１６年生樟子松人工林个体为研究材料，测定其主要耐旱生理指标（πｊｐ、ε等）地区间的差异性，结果表明，樟子松主要的耐旱生理指标在不同地区间存在着显著差异（Ｐ≤０．０５）；其变化与各地区的气候湿度指标（Ｉｍ）呈显著线性相关（Ｐ≤０．０５），可用ｙ＝Ａ＋Ｂｘ关系式表达（ｙ为耐旱生理指标；ｘ为Ｉｍ）．当Ｉｍ由－２９．６降至－７０．２时，嫩枝生长初期和年生长季末期，初始失膨点总体渗透势（πｐ）随Ｉｍ的变化率（Ｂ）分别为０．００３４ＭＰａ和０．００６１ＭＰａ，最大总体体积弹性模数（ε）随Ｉｍ的变化率（Ｂ）分别为０．０１７ＭＰａ和０．０３１ＭＰａ，从而证明樟子松是耐旱性可变树种，可通过干旱锻炼提高其耐旱性．
The 14-16-year-old Pinus sylvestris var. Mongolica planted in semi-humid area, semi-arid area and semi-arid area on the sandy land of the transitional area of dry land were used as materials to determine the differences of their physiological indexes (πjp, ε, etc.) The results showed that the major physiological indexes of drought tolerance of Pinus sylvestris var. Mongolica were significantly different among different regions (P≤0.05), and the changes were in significant linear correlation with the climatic humidity index (Im) of each region (P≤0 .05), which can be expressed by the relation of y = A + Bx (y is drought tolerance physiological index; x is Im). When the Im decreased from -29.6 to -70.2, the rate of change of the total infiltration potential (πp) with Im at the initial stage of growth and the end of the annual growth season were 0.0034MPa and 0 0.0061MPa, the maximum total volume elastic modulus (ε) with the rate of change of Im (B) were 0.017MPa and 0.031MPa, which proves that Pinus sylvestris is a variable drought-tolerant species that can be drought-resistant to improve its resistance Drought.