摘要
运用 SAS分别建立了 5种针叶树树高与树龄的回归方程。通过模型分析 ,预测了 5种针叶树在研究区内的最终树高 ,分析了不同生长阶段树高生长的速度变化 ,比较了树高生长的快慢 ,划分了树高的生长阶段 ,提出了相应的经营措施。
Five conifers height growth functions have been established by SAS software.The final heights of five conifers were predicted in the research zone, changes of height velocity of growth were given, height velocity of growth were compared at different stages and stages of height growth were classified by height-age model analysis. Management measures are proposed.
出处
《陕西林业科技》
2003年第1期14-17,共4页
Shaanxi Forest Science and Technology
基金
国家"94 8"项目"美国黄松优良种源家系及快繁技术引进"
项目编号 98- 4- 0 5
