黑龙江省西部半干旱区8种阔叶乔木主要生理参数的特征分析

Characteristics Analysis of Mainly Phosiological Parameters of Eight Kinds of Broad-leaved Trees in Semiarid Area in Western Heilongjiang Province

采用Li-6400便携式光合测定系统对黑龙江省西部半干旱区8种阔叶乔木主要生理参数进行了观测(盆栽试验)与比较分析。结果表明:随着光强的梯度变化,各树种的主要生理参数表现出不同程度的差异;通过对这些参数的平均值进行系统聚类分析,结果为:银中杨、349柳、DN113杨属于高光合、中蒸腾、高水分利用效率树种,山新杨、109柳为中光合、中蒸腾、中水分利用效率树种,青山杨为高光合、高蒸腾耗水型、中水分利用效率树种,中黑防为中光合、高蒸腾耗水型、中水分利用效率树种,小黑杨为低光合、低蒸腾节水型、低水分利用效率树种。测定结果在一定程度上揭示了这些树种在生产中的适应性及现实表现状况的生理生态特征,为该区节水抗旱树种的筛选提供了生理学的依据。

Main physiological parameters of eight kinds of broad-leaved trees were observed comparatively analyzed by using Li-6400 portable photosynthesis system for semiarid area in western Heilongjiang province.Result shows that： with the light intensity gradient,the main physiological parameters of the species shows different degrees of difference;by the average of these parameters for cluster analysis.The result is： Populus alba × P.berolinensis,349 willow,DN113 poplar belong to high-photosynthesis,middle-transpiration high-water-use-efficiency species;Populus davidiana×P.bolleana,109 willow belong to middle photosynthesis,middle transpiration,middle-water-use-efficiency species;Populus pseudo-cathavana ×P.doltoides is high-photosynthetic,high-transpiration-water-consumption,middle-water-use efficiency species;Populus deltoides×P.cathayana is middle-photosynthetic,high-transpiration-water-consumption,middle-water-use-efficiency species;Populus simonii×P.nigra is low-photosynthesis,low-transpiration water-saving,low-water-use-efficiency species.Measurement results reveal adaptability in the production physio-ecological characteristics of the real performance of these species;it provide a physiological basis for selecting drought-resistant water-saving species for this area.