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.
出处
《西北林学院学报》
CSCD
北大核心
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
关键词
食松
油松
樟子松
抗旱性
水分生理
Pinus edulis Engelm
Pinus tabulaeformis
Pinus sylvestris var. mongolica
drought resistant
water physiology
