嫩江沙地防护林低耗水树种评价  

Evaluation on Species with Low Water-Consumption in Nenjiang River Sandyland

作　　者：张玉柱[1] 俞冬兴[1] 毕广有[1] 李树森[1] 曹志伟[1] 

机构地区：[1]黑龙江省森林与环境科学研究院,黑龙江齐齐哈尔161005

出　　处：《防护林科技》2014年第1期4-7,共4页Protection Forest Science and Technology

摘　　要：通过对防护林体系内主要树种蒸腾耗水量的观测,研究分析了不同树种之间蒸腾耗水的差异,结果表明:在嫩江平原当前防护林体系中,针叶树中樟子松纯林的蒸腾速率最小,农防林建设和更新改造中要重点采用该树种,逐步提高樟子松作为防护林建设和更新主栽树种比重;阔叶树中小黑杨蒸腾速率最小,生长季耗水量小于年降水量,可作为农防林首选阔叶树种;几种灌木树种生长季耗水量小于同期降雨量,可与其他乔木树种搭配,形成乔灌结合林型,降低单位面积耗水量。Through observations of the transpiration water-consumption of the main tree species in the shelterbelt system,difference of transpiration water-consumption among different species were analyzed.Result shows that:in the current shelter system of the Nenjiang Plain,transpiration rate of pure forest for Pinus sylvestris var.mongolica in conifers is the smallest;Pinus sylvestris var.mongolicaare used to be focused in construction and regeneration of the species in pure and agricultural protection forest;proportion of regenerated species &shelterbelt construction for Pinus sylvestris var.mongolica were gradually increased;the transpiration rate of Populus×xiaohei T.S.Hwang et Liang is the smallest in broadleaved trees;water-consumption of Populus×xiaohei T.S.Hwang et Liang during the growing season is less than that of the annual precipitation can be used as the preferred shelterbelt species;waterconsumption of several shrub species in the growing season is less than the rainfall in the same period,which can be arranged with other tree species,forming forest type of combinations of trees &shrubs,reducing water-consumption per unit area.

关 键 词：农田防护林 蒸腾速率 低耗水树种 效益 

分 类 号：S727.2[农业科学—林木遗传育种]