摘要
在洞庭湖区垸内、外滩地I - 72、I - 6 9、I - 6 3杨混系造林的杨树林地不分品系收集样地 99块、解析木材料 5 0株 ,选用H =M (1 -Le-KA)公式为树高曲线方程 ,基准年龄 6年 ,指数级距 2m ,指数级 7个 (1 0 - 2 2m) ,采用树高相对值法导出各指数级各年龄树高值 ,编制出湖区垸内、外滩地
experimental and 50 sprouts analysis tree plots from the I-72,I-69,I-63,mingle clone poplar afforested within Dongting Lake areas and outside its beach were collected without considering the strain.By of using H=M(1-Le -KA )as curvilinear equation of height of tree,basic standard year is 6 years,exponential spur is 2m,exponential series is 7(10-22m).By use of the method of height of tree relative value,the height of tree value at every exponential spur and every year were derived.Site index form which is suitable for 3 clones of south China poplar,and mixed clones afforestation poplar stand was set up.
出处
《湖南林业科技》
北大核心
2000年第4期14-18,共5页
Hunan Forestry Science & Technology