文献类型：期刊文献

中文题名：几种沙生灌木的抗旱性综合评价

英文题名：Comprehensive Evaluation of Drought Resistance of Different Desert Shrub in Ulan Buh Desert

作者：李清河[1,2] 王赛宵[1,2] 徐军[3] 任文佼[1,2] 赵英铭[3]

第一作者：李清河

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;[2]林木遗传育种国家重点实验室;[3]中国林业科学研究院沙漠林业实验中心

年份：2012

卷号：28

期号：13

起止页码：103-108

中文期刊名：中国农学通报

外文期刊名：Chinese Agricultural Science Bulletin

收录：CSTPCD;;CSCD:【CSCD_E2011_2012】；

基金：林业科技成果国家级推广项目"抗旱节水型优良灌木种源选育技术示范推广"([2011]28号);所重点项目资金"乌兰布和沙漠地区白刺的生态适应性与繁殖机制研究"(ZD200915)

语种：中文

中文关键词：沙生灌木;抗旱性;隶属函数;主成分分析

外文关键词：desert shrub; drought resistance; subordination function; principal component analysis

分类号：S718.43;S793

摘要：为了给沙生灌木抗旱性评价指标体系及优良树种的筛选提供依据,以乌兰布和沙漠地区生长的唐古特白刺、小果白刺、柠条、长叶红沙、沙冬青、霸王6种沙生灌木的1年生幼苗作为试验材料,通过盆栽试验的反复干旱法,在测定的一系列形态、生长指标以及光合、水分生理指标的基础上,经过主成分分析的降维分析,采用隶属函数对6种沙生灌木的抗旱性进行了综合评价。结果表明:筛选出的气孔导度、水分利用效率、水势、枝条长度、根干重、侧根数、叶片总数、侧枝数等生理、根系与枝条形态生长两类因子可作为沙生灌木抗旱性评价鉴定的指标;相比于对照处理,各树种在水分胁迫处理下的气孔导度和水势值都降低,而水分利用效率增加,其中长叶红沙的变化幅度最大。而各个形态生长指标在树种间表现出不同的变化差异。结合多种指标分析的综合评价,6种植物的抗旱性由强到弱的顺序为:长叶红沙、霸王、柠条、唐古特白刺、沙冬青、小果白刺。
The aim was to provide the foundation to establish the evaluation indicators system of the drought resistance of the desert shrub and to select the excellent afforestation species. One-year-old seedlings of the six desert shrubs in Ulan Buh Desert, Nitraria tangutorum, Nitraria sibirica, Zygophyllum xanthoxylon, Ammopiptanthus mongolicus, Caragana korshinskii and Reaumuria trigyna were selected as experimental materials. The pot experiment was conducted with the repeated drought method. Many morphological and growth indices and photosynthetic and water physiological indices were measured. After the treatment of PCA, their comprehensive analyses on drought resistance were conducted with the subordination function method. It was showed that eight indices, stomatal conductance, water use efficiency, water potential, branch length, root dry weight, lateral root number, total leaf number and lateral branch number, could be treated as the important indicators of drought-resistant evaluation for the desert shrub. Compared with the water normal treatment, the value of stomatal conductance and water potential of all shrubs decreased in the water stress treatment, but the water use efficiency increased. Among the six shrubs, Reaumuria trigyna was provided with the maximum variation range. Meanwhile the morphological and growth indices presented the different variation differences for the six shrubs. Based on the comprehensive evaluation of the multi-indices analysis, the drought-resistance order of the six desert shrubs was as follows： Reaumuria trigyna Zygophyllum xanthoxylon Caragana korshinskii Nitraria tangutorum Ammopiptanthus mongolicus Nitraria sibirica.