【摘要】 根据树木耐旱性这一复合性状的特点,建立了树木耐旱性的定量化研究模式,并通过这一研究模式综合评价了太行山区主要造林树种的耐旱特性.研究表明,太行山区造林树种的耐旱途径可分为两大基本类型,即高水势延迟脱水耐旱途径(如油松)和低水势忍耐脱水耐旱途径(如侧柏、元宝枫等),其中大多数树种的耐早机理属于后者.依据供试树种的耐旱特点,它们的耐旱能力从强至弱排列如下:侧柏、黄栌、元宝枫、栓皮栎、油松、沙棘、紫穗槐、刺槐和白蜡.更多还原

【Abstract】 The model of quantitative research on drought tolerance in tree species is established according to drought tolerance which is of complex characteristics. The drought tolerance of main tree species used in afforestation in Taihang montain region are appraised comprehensively by this model.Our researches show that two primary types of drought tolerance can be identified in tree species used in afforestation in Taihang montain region. One of them is drought tolerance with dehydration postponment at high tissue water potential, for example, Pinus tabulaeformis. Another is drought tolerance with dehydration tolerance at low tissue water potential, for example, Plaiycladus orientalis, Acer truncatum, et al. The mechanisms of drought tolerance in most of tree species examined belong to the latter. According to the characteristics of drought tolerance in tree species examined, their drought tolerance is arranged from strong to weak as fallowing. Platycladus orientalis, Cotinus coggygria, Acer truncatum, Quercus variabilis, Pinus tabulae for mis, Hippophea rhamnoides, Amorpha fruticosa, Robinia pseudoacacia, and Fraxinus americana.更多还原