不同种源栓皮栎幼苗水分适应及耐旱特性比较研究  

A comparative study on characters of drought resistance for four provenances of Quercus variabilis

作　　者：张文辉[1] 段宝利[1] 周建云[1] 刘国彬[2] 

机构地区：[1]西北农林科技大学,陕西杨陵712100 [2]中国科学院水利部水土保持研究所,陕西杨陵712100

出　　处：《西北植物学报》2003年第5期728-734,共7页Acta Botanica Boreali-Occidentalia Sinica

基　　金：中国科学院知识创新工程项目 KZCX1-06-2 ;陕西省科技攻关项目 2001;K04-G12

摘　　要：在大田试验条件下系统研究了4个不同种源的栓皮栎3年生幼苗水分适应和耐旱性生理特性.在5、6、7、9月份分别测定了不同种源自然饱和亏、临界饱和亏、自然需水程度、黎明前叶水势、日最低水势以及黎明叶水势与日最低叶水势差,统计分析了不同种源、不同生长期的水分参数变化规律,并对不同种源耐旱性作出了综合评价.结果表明,综合耐旱性指数在不同种源间存在显著差异 P<0.05 .各种源抗旱性强弱顺序为:黄龙种源>秦岭北坡种源>伏牛山种源>巴山种源.Under field experiment,the drought resistance indexes, including the natural water saturation deficiency (nw.s.d.), the critical( w.s.d.), the water requirement, the predawn water potation(PΨw ), the daily minimum water potation (DΨwmin) and the difference between the PΨw and the DΨwmin of four provenances of Quercus variabilis from Bashan Mt., Funiushan Mt., the north slope of Qinling Mt. and Huanglong Mt. were studied systematically during May. June, July, September and October. After the statistics and analysis of all the water relation indexes of 4 Quercus variabilis provenances in different growth time, characters of drought resistance were evaluated. There were significantly difference among indexes of four provenances of Quercus variabilis (P<0.05). The order of drought resistance of four provenances was that: Huanglong Mt. provenance > north slope of Qinling Mt. provenance> Funiushan Mt. provenance> Bashan Mt. provenance. 

关 键 词：种源 栓皮栎 幼苗 水分适应 耐旱特性 抗旱性 

分 类 号：S792.18[农业科学—林木遗传育种] Q945.17[农业科学—林学]