食松、油松和樟子松抗旱水分生理比较研究  

Water Physiology of Pinus edulis Engelm.,P.tabulaeformis and P.sylvestris var.mongolica under Drought Stress

作　　者：白洁冰[1] 王志刚[1] 陈飞[1] 李天菊[1] 韩刚[1] 

机构地区：[1]西北农林科技大学林学院,陕西杨陵712100

出　　处：《西北林学院学报》2008年第1期10-13,共4页Journal of Northwest Forestry University

基　　金：国家林业局"948"项目"抗逆性可食松及栽培技术引进"(2001-37);西北农林科技大学大学生科技创新项目

摘　　要：在严重干旱胁迫条件下,对食松、油松和樟子松苗的针叶相对含水量、束/自比值、保水力、清晨叶水势、蒸腾速率、质膜相对透性和丙二醛含量等水分生理指标及苗木伤害指标进行了比较研究,并应用隶属函数值法对三树种基于以上7项指标的抗旱性进行了综合评价。食松抗旱性仅略低于樟子松,但明显优于油松。在以水分为主要限制因子的干旱半干旱区,食松有着广泛的适生范围,陕西境内的毛乌素沙区、黄土高原丘陵沟壑区及渭北旱塬区均具有发展前景。Under severe drought stress, some physiological and seedling damage indices of Pinus edulis Engelm. , P. tabulaeformis and P. sylvestris vat. mongolica were comparatively studied such as needle leaf relative water content, ratio of bound water to free water, ability of keeping watwr, water potential in the morning, transpiration rate, relative permeability of plasmalemma and MDA content. The drought resistances of three Pinus species trees were evaluated comprehensively by using subordinate function values based on seven indicess above mentioned. The results showed that drought resistance of P. edulis Engelm. was slightly lower than P. sylvestris var. mongolica, but significantly higer than P. abulaeformis. There existed a broad range fitting to P. edulis Engelm. growing in arid and semi-arid area, indiating its poten- tial extention value in Maowusu sandland, loess hilly-gully region and Weibei dryland region.

关 键 词：食松 油松 樟子松 抗旱性 水分生理 

分 类 号：S718.43[农业科学—林学]