【摘要】 选取内蒙古大青山区30a生油松人工林作为标准地,研究了其叶面积指数与生物量之间的关系及叶面积指数与各相关生长因子之间的关系,结果表明:1)油松单株各龄叶的叶面积与其叶生物量均呈正相关直线;油松叶面积指数与单位样地面积叶生物量关系可模拟为:y=k-aEXP(-bx)。整个生长季叶生物量达到最大时的叶面积指数变动范围为10.75~16.19。2)油松单株各龄叶面积与总叶面积的关系可模拟为y=aEXP(-b^xk)。3)林分叶面积指数与其胸径的关系,经比较分析y=aEXP(-b/^xk)(x为平均胸径,y为叶面积指数)的模拟效果最好。叶面积指数随着平均胸径的增大而逐渐减小直至最后达到稳定。更多还原

【Abstract】 The relationship among the leaf area indexes and its biomass and growth factors were studied in the 30-year-old artificial forest of Pinus tabulaeformis in Daqing Mountains in Inner Mongolia.The results showed that the leaf area of different ages was positively correlated with its biomass and the relationship between the leaf area index of Pinus tabulaeformis and its biomass in unit area could be expressed by the equation y=k-aEXP(-bx).In the whole growth season,the range of leaf area index was 10.75～16.19 when the leaf biomass reached the maximum.The relationship between the leaf area of leaves in different ages of Pinus tabulaeformis individual and the total leaf area could be expressed by the equation y=aEXP(-bx^k).The relationship between the leaf area index and the diameter of the stand was simulated by the model: y=aEXP(-b/x^k)(x is the average diameter of stand,y is the leaf area index),and the simulating result was the best according to comparing with others.Meanwhile the leaf area index decreased with the increase of the diameter of the stand gradually and finally reached stabilization.更多还原