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干热河谷主要造林树种水分生理生态学特点 被引量:7

THE PHYSIOECOLOGICAL CHARACTERISTICS OF SOME IMPORTANT SILVICULTURAL SPECIES GROWING IN THE DRY-HOT RIVER VALLEY
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摘要 对8个造林树种的叶片自然含水量及蒸腾速率与环境因子的关系进行了分析.结果表明,蒸腾速率的日变化、含水量和蒸腾速率的季节变化与大气温度和相对湿度密切相关,但各环境因子的影响各不相同.旱季,绢毛相思、马占相思、大叶相思、薄荚相思和纹荚相思是以减少蒸腾来抵御干旱;赤桉和肯氏相思以强大的根系来维持水分吸收能力。 From the study on water content and transpiration rates of some important silvicultural species in leaves and their relations to the environmental factors,it was seen that the diurnal changes of transpiration rates,seasonal changes of water content and transpiration rates had high correlationship with atmospheric temperature and relative humidity The reaction of environmental factors were found different In dry season,A holosericea,A mangium,A auriculiformis,A leptocarpa and A aulacocarpa were attributed to their drought-avaidance because of their lower transpiration rates E camaldulensis and A cunning hamii were characterized by higher transpiration rates and higher drought-resistance
出处 《西南林学院学报》 1997年第2期30-35,共6页 Journal of Southwest Forestry College
基金 国家"八五"重点科技攻关项目
关键词 含水量 蒸腾速率 环境因子 树种 造林 Water content Transpiration rates Environmental factors
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