With the method of long-term experiment and statistical analysis,time variation of leaf traits and their correlations in a whole growth season were studied.The result showed that:（1） leaf area increased with growth ...With the method of long-term experiment and statistical analysis,time variation of leaf traits and their correlations in a whole growth season were studied.The result showed that:（1） leaf area increased with growth time prolonging and the curve took on S pattern.Its relationship could be described with y=e（5.528 93-5.104/x）.The specific leaf weight increased with growth time prolonging and its model was cubic y=0.000 002 x30.000 8 x2+0.088 1 x+2.942 1.Leaf water content in the growth season increased in the model y=-0.000 1 x3+0.031 9 x2-3.616 3 x+424.56.Season dynamics of leaf fresh weight in the growth season was S pattern and its model was y=e（1.770 8﹣36.299/x）.Leaf dry weight was y=0.042 5 x0.697 1.Dry / fresh ratio was y = 0.000 000 009x3-0.002 6 x2+0.262 x+16.946.（2） a significant positive correlation existed between leaf dry weight and leaf area.Their relationship could be described with y=0.008 1 x﹣0.253 6.Relation of leaf fresh weight and leaf area was significant positive correlation and its model was y=0.020 7 x1.020 3.Leaf dry weight and leaf water content was significant negative correlation and its model was y=7.710 6e﹣0.002 7 x.With the method of municipal statistical analysis,it confirmed that the relation among the leaf dry weight,leaf area,leaf water content,specific leaf weight,dry / fresh ratio was y（leaf dry weight）=0.006 6 x1（leaf area）+0.003 22 x2（leaf water content）+0.187 95 x3（specific leaf weight）+0.035 27 x4（dry/fresh ratio）-3.071 2.（3） it proved that season variation of paulownia leaf modal traits closely related to the local climate.The other traits and their mechanisms needed further study.展开更多
文摘With the method of long-term experiment and statistical analysis,time variation of leaf traits and their correlations in a whole growth season were studied.The result showed that:（1） leaf area increased with growth time prolonging and the curve took on S pattern.Its relationship could be described with y=e（5.528 93-5.104/x）.The specific leaf weight increased with growth time prolonging and its model was cubic y=0.000 002 x30.000 8 x2+0.088 1 x+2.942 1.Leaf water content in the growth season increased in the model y=-0.000 1 x3+0.031 9 x2-3.616 3 x+424.56.Season dynamics of leaf fresh weight in the growth season was S pattern and its model was y=e（1.770 8﹣36.299/x）.Leaf dry weight was y=0.042 5 x0.697 1.Dry / fresh ratio was y = 0.000 000 009x3-0.002 6 x2+0.262 x+16.946.（2） a significant positive correlation existed between leaf dry weight and leaf area.Their relationship could be described with y=0.008 1 x﹣0.253 6.Relation of leaf fresh weight and leaf area was significant positive correlation and its model was y=0.020 7 x1.020 3.Leaf dry weight and leaf water content was significant negative correlation and its model was y=7.710 6e﹣0.002 7 x.With the method of municipal statistical analysis,it confirmed that the relation among the leaf dry weight,leaf area,leaf water content,specific leaf weight,dry / fresh ratio was y（leaf dry weight）=0.006 6 x1（leaf area）+0.003 22 x2（leaf water content）+0.187 95 x3（specific leaf weight）+0.035 27 x4（dry/fresh ratio）-3.071 2.（3） it proved that season variation of paulownia leaf modal traits closely related to the local climate.The other traits and their mechanisms needed further study.
