当前位置: 首页 > 文章 > I-69杨人工林生长进程动态分析 甘肃农业大学学报 2004,39 (6) 57-61
Position: Home > Articles > Dynamic analysis of growth on I-69 poplar artificial forest Journal of Gansu Agricultural University 2004,39 (6) 57-61

I-69杨人工林生长进程动态分析

作  者:
秦光华;姜岳忠;王卫东;陈瑞荣;王桂岩
单  位:
山东省莒县林业局;山东省林业科学研究院
关键词:
I-69杨;人工林;Logistic方程;生长模型
摘  要:
利用Logistic方程对2种密度的14年生I-69杨人工林的树高、胸径和平均单株材积的生长进程进行拟合。结果表明:利用Logistic方程拟合效果显著,相关系数皆在0.93以上。并以此将I-69杨林木的生长过程分为生长前期、速生期和生长后期三个阶段,生长量在三个阶段表现出明显的“慢-快-慢”的节律,对各生长阶段的生长特点进行了分析。其中速生期内的树高生长量占总生长量的比率平均为56.9%,胸径生长量占总生长量的比率平均为57.3%,材积生长量占总生长量的比率平均为50.9%。密植林分林木的各项生长指标的速生期持续时间均比稀植林分林木的速生期持续时间短;材积的速生期持续时间比树高和胸径的速生期持续时间短,而树高和胸径的速生期持续时间差异不大。
译  名:
Dynamic analysis of growth on I-69 poplar artificial forest
作  者:
QIN Guang-hua1,JIANG Yue-zhong1,WANG Wei-dong1,CHEN Rui-rong2,WANG Gui-yan1(1.Shandong Academy of Forestry,Shandong,Jinan 250014;2.Juxian Forestry Bureau,Shandong,Juxian,276500,China)
关键词:
P. deltoides Bartr cv.;plantation;Logistic equation;growth model
摘  要:
Logistic equation was applied to model the growth, such as height, diameter at breast height and volume per tree of I-69 poplar plantation in two densities. The results showed that the fit effect of the model was significant and the correlation coefficients were more than 0.93. Based on the equation, growth of poplar plantation could be divided into three periods, named survival period, fast-growing period and post-growing period. Growth performance in each period was also analyzed and discussed. Average height (H), diameter at breast height (D1.3) and volume per tree (V) in fast-growth period were 56.9 %, 57.3 % and 50.9 % respectively in the total growth. Fast-growing period of dense spacing was shorter than that of sparse density. The persisting time of V in the fast-growing period was shorter than that of H and D1.3. Fast-growth period of H and D1.3 lasted longer than that of V.

相似文章

计量
文章访问数: 8
HTML全文浏览量: 0
PDF下载量: 0

所属期刊

推荐期刊