长江滩地69杨生材含水率株内变异规律的研究  

Studies on Variation of Moisture Content in Green Wood of Poplar 69 in the Benches of Changjiang River

作　　者：刘盛全[1] 储茵[1] 张育才 王伟生 

机构地区：[1]安徽农业大学,合肥230036 [2]岳西县林业局

出　　处：《安徽农业大学学报》1999年第4期384-387,共4页Journal of Anhui Agricultural University

基　　金：国家九五 "攀登"启动项目

摘　　要：以长江滩地淹水和未淹水两种情况下生长的两株６９ 杨为材料， 研究其生材含水率在树干内的变异规律。结果表明，淹水和未淹水两种情况下的６９ 杨生材含水率的径向变异都为自髓心向外开始以直线或曲线下降， 到５～６ 年生长轮处达最小值， 以后又略有增大；其纵向变异规律在未淹水情况下为自树干基部向上逐渐降低， 在淹水情况下为自树干基部向上逐渐下降， 但到３３ ｍ 高度又有回升。与未淹水的相比， ６９ 杨淹水以后， 生材含水率在树干的基部和顶部（０３ ｍ ， ５３ ｍ ） 生材含水率明显增大（０３ ｍ 和５３ ｍ 分别增大７７％ ，９２％ ）， 而树干中部反而变小 （１３ ｍ 和３３ ｍ 分别减小５３％ 、５８％ ）。Two trees of Poplar 69 (Populus deeltoides cv.69/55),which grown in the flooding and unflooding conditions respectively on the benches of Changjiang river,were used to deeply analyses their variation of moisture content in green wood.The radial variation of the two trees firstly decreased from pith outward,get minimum at 5～6 years,and then increased again.Their axial variation have two types of pattern:one decreased eventually from the base upward in unflooding condition,the other is that from the base upwards,first decreased,gets minimum at 3 3 m,and then increased again in the flooding condition.Compared with the poplar 69 grown in the unflooding condition,the moisture content in green wood of poplar 69 at the base and the top of the stem (0 3 m,5 3 m) in flooding condition increased obviously (increased 7 7% and 9 2% respectively at 0 3 m and 5 3 m),but in the middle of the stem,that decreased markedly (decreased 5 3% and 5 8% respectively at 1 3 m and 5 3 m).

关 键 词：69杨 生材含水率 变异规律 

分 类 号：S781.33[农业科学—木材科学与技术]