摘要
通过对榆树、白桦、毛赤杨、落叶松等单木树种生长期内的叶面积指数测量,分析其生长规律,运用Logistic生长模型拟合在生长期的叶面积指数,分析结果表明:落叶林各个回归模型的相关系数都达到了显著水平;各主要树种在生长季节叶面积指数呈逻辑斯蒂增长;不同树种,展叶盛期不同,基本上在7月初达到最大值;樟子松、红皮云杉、红松、冷杉常绿针叶单木在生长期内整体变化不大。
An experiment was conducted to measure the Leaf Area Index (LAI) of Elm, Betula platyphylla, Alnus sibirica and Larix gmelinii during the growth period for their growth rules. We used Logistic model to fit the leaf area index. The correlation coefficient of each regression model reaches the significant level. This method can provide the theoretical basis for digital simulation of the tree growth. The leaf area index of principal species during the growth season is increased in the form of Logistic. The different species have the different exhibition leaf stages and a maximum value occurs in early July. There is little change for Pinus sylvestrisvar mongolica, Picea koraiensis, Pinus koraiensis and Picea jezoensis evergreen coniferous forest in the overall growth oeriod.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2013年第6期10-13,共4页
Journal of Northeast Forestry University
基金
国家科技支撑计划(2011BAD37B0105)
国家自然科学基金项目(41071272)