Through the study of parse wood materials in Shandong Province, the fitting empirical equation of tree growth was obtained, a function with tree growth was a variable and time as an independent variable. Through mathe...Through the study of parse wood materials in Shandong Province, the fitting empirical equation of tree growth was obtained, a function with tree growth was a variable and time as an independent variable. Through mathematical operations such as function derivation, the mature age of tree growth was obtained. The obtained expected maturity age for Populus canadensis Moench forest was 11 a for pulp material, 26 a for pillar materials and 41 a for peeler. And the application, research directions and precautions of the mature ages were proposed.展开更多
Empirical equations were used to fit tree growth through the analysis of parse wood data, functions with tree growth amount as the dependent variable and annual sunshine duration as the independent variable. According...Empirical equations were used to fit tree growth through the analysis of parse wood data, functions with tree growth amount as the dependent variable and annual sunshine duration as the independent variable. According to arithmetical operations like derivation of the functions, the relative contribution rate of light to tree growth was 64.8%, which was almost equal to the relative contribution rate of precipitation to tree growth. Therefore, the light and precipitation were of equal importance to tree growth.展开更多
文摘Through the study of parse wood materials in Shandong Province, the fitting empirical equation of tree growth was obtained, a function with tree growth was a variable and time as an independent variable. Through mathematical operations such as function derivation, the mature age of tree growth was obtained. The obtained expected maturity age for Populus canadensis Moench forest was 11 a for pulp material, 26 a for pillar materials and 41 a for peeler. And the application, research directions and precautions of the mature ages were proposed.
文摘Empirical equations were used to fit tree growth through the analysis of parse wood data, functions with tree growth amount as the dependent variable and annual sunshine duration as the independent variable. According to arithmetical operations like derivation of the functions, the relative contribution rate of light to tree growth was 64.8%, which was almost equal to the relative contribution rate of precipitation to tree growth. Therefore, the light and precipitation were of equal importance to tree growth.
