水分胁迫对4树种幼苗叶水势和持水力的影响  

Effect of water stress on leaf water potential and leaf holding water capacity in seedlings of the different tree species

作　　者：史胜青[1,2] 孙晓光[3] 王颖[2] 袁玉欣[2] 江泽平[1] 

机构地区：[1]中国林业科学研究院林业研究所,北京100091 [2]河北农业大学林学院,河北保定071000 [3]保定市交通局公路管理处,河北保定071000

出　　处：《河北农业大学学报》2009年第6期24-28,共5页Journal of Hebei Agricultural University

基　　金：河北省自然科学基金(301145);河北省林业局重点项目;国家"十一五"科技支撑项目(2006BAD03A01-07)

摘　　要：以皂荚(Gleditsia sinensis)、核桃(Juglans regia)、柿子(Diospyros kaki)和黑枣(Diospyros lotus)为材料,在田间持水量为80%、60%、40%和30%的条件下对4树种幼苗叶含水量、叶水势和叶持水力进行了研究。结果表明:严重水分胁迫下,4树种叶含水量降低幅度是核桃<柿树<皂荚<黑枣,核桃和柿树能够保持较高的叶水势,而皂荚和黑枣的叶水势则比较低;充足供水条件下,4树种叶持水力是皂荚>核桃>柿树>黑枣,水分胁迫诱导了皂荚、柿树和黑枣叶片持水力的提高,而耐旱的核桃却没有明显的变化。Leaf water content,leaf water potential and leaf holding water capacity of four tree seedlings（Gleditsia sinensis,Juglans regia,Diospyros kaki and Diospyros lotus） were studied under four water stress treatments： 80%,60%,40% and 30% of soil field capacity.The results showed that the range of decrease in leaf water content of four trees was J.regia〈D.kaki〈G.sinensis〈D.lotus under severe water stress（30%）,and leaf water potential of J.regia and D.kaki could maintain the higher level,but that of G.sinensis and D.lotus was lower under severe water stress;leaf holding water capacity of four trees was G.sinensis〉J.regia〉D.kaki〉D.lotus under normal condition（80%）,but,it was prompted in G.sinensis,D.kaki and D.lotus,instead of J.regia under water stress.

关 键 词：水分协迫 不同树种 叶水势 持水力 

分 类 号：S759.3[农业科学—森林经理学]