干旱胁迫对苗木蒸腾耗水和生长的影响  

Effect of drought stress on transpiration and growth characteristics of young plant

作　　者：李文华[1] 刘广权[1] 马松涛[1] 王鸿哲[1] 

机构地区：[1]西北农林科技大学林学院,陕西杨凌712100

出　　处：《西北农林科技大学学报（自然科学版）》2004年第1期61-65,共5页Journal of Northwest A&F University(Natural Science Edition)

基　　金：国家林业局重点科学技术研究项目(2000-07);国家"十五"科技攻关项目(2001BA510B0103)

摘　　要：　在玻璃温室内采用盆栽试验研究了不同土壤水分处理对生长在黄绵土上的1年生仁用杏、刺槐和紫穗槐苗的水分特征和生长特征的影响。结果表明,3个树种的叶片相对含水率和单株耗水量均随土壤水分的降低而降低,各处理间的单株耗水量差异显著;叶片饱和亏、保水力和单株水分利用率随土壤干旱胁迫的加剧而有所提高,不同树种的水分利用率对各处理的反应不同;根干重、茎干重和生物量等生长特征指标也随土壤水分的降低呈下降趋势,不同土壤水分处理对紫穗槐的茎重、根重、总生物量及刺槐的根重、总生物量和仁用杏的总生物量影响显著;其余指标各处理间差异不显著;土壤含水量在最大田间持水量的52%以上时,仁用杏才有较大的生物量,刺槐和紫穗槐才能存活。In green-house,pot-cultured 1-year Robinia pseudoacacia,Amorpha fruticosa and Prnuus armeniac×sibirica's growth and water character were studied under different treatment of soil moisture.The main results showed that:relative water content (RWC) of three plants leaves and water consumption declined with the declining soil moisture.Water consumption was significantly affected by different treatment of soil moisture ;water potential,water-holding capacity and water use efficiency was improved with increased water stress of soil moisture,water use efficiency of different plant was differently affected by different treatment of soil moisture;dry weight of shoot,dry weight of root and biomass declined with the declining of soil moisture;dry weight of shoot,dry weight of root and biomass of Amorpha fruticosa and dry weight of root,biomass of Robinia pseudoacacia and biomass of Robinia pseudoacacia were insignificant under different treatment of soil moisture;It was above 52% θ_f of soil moisture for Prnuus armeniac×sibirica to get bigger biomass,Robinia pseudoacacia and Amorpha fruticosa can survive.

关 键 词：干旱胁迫 苗木 蒸腾耗水量 生长发育 影响因素 

分 类 号：S718.43[农业科学—林学]