文献类型：期刊文献

中文题名：干旱胁迫下金沙江干热河谷主要造林树种盆植苗的蒸腾耗水特性

英文题名：Studies on Transpiration of seedlings of the Main Tree Species Under the Condition of Drought Stress in the Dry-hot River Valleys of the Jinsha River

作者：段爱国[1] 张建国[1] 何彩云[1] 张俊佩[1] 张守攻[1]

第一作者：段爱国

机构：[1]中国林业科学研究院林业研究所,国家林业局林木培育重点实验室,北京100091

年份：2008

卷号：21

期号：4

起止页码：436-445

中文期刊名：林业科学研究

外文期刊名：Forest Research

收录：CSTPCD;;Scopus;北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

基金：国家林业局林业重点工程科技支撑项目“西南困难立地抗逆性优良乔灌木树种选择及快繁技术试验示范”

语种：中文

中文关键词：干热河谷;苗木;蒸腾耗水;干旱胁迫

外文关键词：dry-hot river valley; seedlings; transpiring water consumption; drought stress

分类号：Q945.78

摘要：对土壤干旱胁迫条件下金沙江干热河谷29个植被恢复树种盆植苗的蒸腾耗水特性进行了研究，结果表明：（1）白天不同幼苗蒸腾耗水量均随干旱时间的延长而持续下降，而且下降的幅度具有明显差异；当水分供给量相同时，高强度蒸腾失水的幼苗在极度干热的天气里更易亦更快地受到干旱的胁迫。（2）干旱6d后，黑荆、新银合欢、杞木和兰桉的实际蒸腾耗水量下降幅度最大，达85．78％～93．11％；久树、攀枝花、山毛豆、山合欢及云南松的下降幅度最小，仅为6．37％～17．42％。蒸腾量下降比例的聚类结果与幼苗k值大小比较结果基本一致。（3）幼苗第1天的蒸腾量大小决定了定量供水条件下幼苗蒸腾失水的动态变化状况。随着干旱胁迫的延伸，幼苗夜晚蒸腾量占全天蒸腾量的比例有所增加。（4）当幼苗处于严重水分胁迫时，3月份25种供试幼苗白天蒸腾耗水量下降幅度的大小排序与中度水分胁迫时一致。（5）依据幼苗白天蒸腾耗水速率与土壤水势的数量关系，应用系统聚类法将29种供试幼苗分为高、亚高、亚低及低蒸腾耗水速率等4类。
Transpiration of twenty-nine potted afforestation species for vegetation restoration in the dry-hot valleys of the Jinsha River was studied under different drought stress weight on typical sunny day. Five main conclusions were gotten as follows ： （ 1 ） The transpiring water consumption of different seedlings in the day time presented a sustained descent with the drought stress, the descending extent of different seedlings was obviously different. The seedlings, with the strong water consumption, were more easy and quick to suffer from drought stress. （2） After six-day＇ s drought treatment, the practical water consumption of Acacia mearusii, Leucaena leucocephala cv. Salvador, Carallia longipes, Eucalyptus globulus descended the most, being 85.78%～93.11% ; Schleichera oleosa, Bombax malabaricum, Tephrosia candida, Albizia kalkora, Pinus yunnanensis descended the least, being only 6.37%～17.42%. The classified result by the descended extent of water consumption was identical to the comparison result of slope k. （ 3 ） The transpiring water consumption of seedlings in the first day determined the dynamic variation of water losing. With the sustaining of drought stress, the proportion of water consumption in the night to water consumption in the whole day gradually increased. （4） When the seedlings suffered serious drought stress in March, the descending proportion order of transpiring from water consumption of twenty-five species was identical to the size order while suffering from middle-class drought stress. （5） According to the quantitative formula between transpiring water consumption rate of seedlings in the day time, systematically classified method could be used to divide twenty-nine tree species into four classifications including high transpiring water consumption, subhigh transpiring water consumption, sub-low transpiring water consumption and low transpiring water consumotion.