Relationships among Leaf Structural Characteristics and DBH Growth of Picea schrenkiana var.tianschanica
DBH is important factor in forest surveys and management evaluations.Study on changing laws of leaf structural characteristics of Picea schrenkiana var.tianschanica with DBH can provide basis for resource protection and precise management of P.schrenkiana var.tianschanica.In Xi Tianshan National Nature Re-serve of Xinjiang,leaf length to width ratio,leaf area,specific leaf area,leaf dry matter content and leaf volume of P.schrenkiana var.tianschanica with different DBHs were investigated,and correlations among leaf structur-al characteristics and DBH growth were explored.Results showed that leaf length to width ratio,leaf area,spe-cific leaf area,leaf dry matter content and leaf volume of P.schrenkiana var.tianschanica varied significantly among different diameter classes.Except that leaf length to width ratio had no significant correlation with specif-ic leaf area,there were extremely significant correlations among leaf structural characteristics.Leaf structural characteristics of P.schrenkiana var.tianschanica had extremely significant correlations with DBH.Leaf area,leaf volume and leaf dry matter content had linearly positive correlations with DBH.Leaf length to width ratio had linearly negative correlation with DBH.Specific leaf area had curve change of firstly increase and then de-crease with DBH.As forest trees grew,P.schrenkiana var.tianschanica adapted to changes of external environ-ments by altering leaf structural characteristics.
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