科尔沁沙地主要造林树种抗旱生理生态特性

为探讨荒漠化地区不同立地条件下树木适应生存的能力,研究了科尔沁沙地主要固沙造林树种的抗旱生理生态特性。通过试验分析,比较它们与土壤水分间的关系,了解其抗旱、固沙能力强弱,为选择适宜的固沙树种提供科学依据。树木生理指标的测定结果表明,樟子松抗旱生理机能优于其它树种并有较旺盛的生长代谢活力,可作为干旱沙地主要造林树种;油松耐干旱瘠薄的生理生态特性虽比樟子松差,但优于其它阔叶树种;小青杨在丘间低地生长较为旺盛。

Physiological and Ecological Characteristics of Drought Resistance of the Main Afforestation Tree Species in Horqin Sandy Land

An experiment was conducted to study the physiological and ecological characteristics of drought resistance of several main sand-fixing tree species in Horqin Sandy Land in order to explore the adaptabilities of tree species under different site conditions.The relationship between drought resistance and soil water content was analysed and the abilities of drought resistance and sand-fixing of the main sand-fixing tree species were compared.Determination result of physiological indexes shows that the physiological function of drought resistance in Pinus sylvestris var.mongolica is better than that in other tree species.P.sylvestris var.mongolica can be used as the main tree species planted in sandy land in terms of its vigorous vitality of growth and metabolism.Pinus tabulaeformis is worse than P.sylvestris var.mongolica in physiological and ecological characteristics,but is superior to other broad-leaved tree species.Populus pseudo simonii grows better in hilly land.