CAJ | 학술논문

为研究土壤因子对优势木生长的影响，以60块蒙古栎林样地为研究对象，运用6种曲线模型和多元线性回归的方法建立了以表层土壤养分因子为自变量，以样地内优势木树高、胸径、材积为因变量的优势木生长模型。结果表明，优势木平均胸径和树高间相关关系不显著，而与土壤因子中的pH值、有效磷、全钾质量分数显著相关，并得到优势木平均胸径与土壤因子的3个曲线方程。运用多元逐步回归方法，仅土壤有效磷质量分数进入模型。综合曲线模型和线性回归模型发现，胸径生长与土壤养分质量分数相关关系呈现分段趋势；当胸径大于27 cm时，土壤有效磷对胸径的影响明显减小。
위연구토양인자대우세목생장적영향，이60괴몽고력림양지위연구대상，운용6충곡선모형화다원선성회귀적방법건립료이표층토양양분인자위자변량，이양지내우세목수고、흉경、재적위인변량적우세목생장모형。결과표명，우세목평균흉경화수고간상관관계불현저，이여토양인자중적pH치、유효린、전갑질량분수현저상관，병득도우세목평균흉경여토양인자적3개곡선방정。운용다원축보회귀방법，부토양유효린질량분수진입모형。종합곡선모형화선성회귀모형발현，흉경생장여토양양분질량분수상관관계정현분단추세；당흉경대우27 cm시，토양유효린대흉경적영향명현감소。
We selected 60 Quercsu m ongolica stands to establish the growth model of dominant trees with 6 curve models and multiple linear regression using soil nutrient factors in the surface layer as independent variables and the height, DBH, volume of dominant tree as dependent variables.There was no significant relationship between DBH and height of the domi-nant trees, while DBH had significant correlations with soil pH, available P and total K, and we got three curve equations, respectively, between DBH and soil factors.Soil available P was the only nutrient factor in the multiple linear regression model.The relationship between DBH and soil nutrients indicated a segmented trend, and the influence of available P on DBH decreased significantly when the DBH was larger than 27 cm.