人工幼林施肥对紫椴光合速率和蒸腾速率的影响  

Effects of fertilization on photosynthetic rate and transpiration rate on young plantation of Tilia amurensis Rupr.

作　　者：刘宝光[1] 

机构地区：[1]北华大学林学院采育林创新中心,吉林132013

出　　处：《植物营养与肥料学报》2011年第2期451-455,共5页Journal of Plant Nutrition and Fertilizers

基　　金：国家自然科学基金项目(30671701)资助

摘　　要：为了提高紫椴人工林培育效益,以紫椴10年生人工幼林为研究对象,采用二次回归正交旋转设计筛选出适宜的追肥配比为氯化钾97.70、钙镁磷肥126.47和尿素241.90 g/plant。氮、磷、钾肥都有提高净光合速率和蒸腾速率的作用,以氮肥最为明显;三者在对净光速率和蒸腾速率的影响方面存在叠加效应。净光合速率与蒸腾速率日变化趋势相似,但在时间上存在差异,每日净光合速率的提高滞后于蒸腾速度的提高。To enhance benefits of Tilia amurensis man-madel forest,an experiment was carried out to study the rational topdressing rate of N,P and K,using Tilia amurensis ten years age young plantation as the study object.The quadratic regression orthogonal rotation test was adopted in this experiment.The results showed that the optimum combination fertilizers was 97.70 g/plant potassium chloride fertilizer and 126.47g/plant fused calcium-magnesium phosphate fertilizer and 241.90 g/plant urea fertilizer.Fertilization could improve net photosynthetic rate and transpiration rate,and N fertilization was most significant compared to single application of P and K.N,P and K fertilization has a synergetic effect on the net photosynthetic rate and transpiration rate.The diurnal change trend of net photosynthetic rate was similar to that of transpiration rate,but was divergent on time.The increase of daily net photosynthetic rate was lagged behind compared to that of transpiration rate.

关 键 词：紫椴 施肥 净光合速率 蒸腾速率 

分 类 号：S792.99[农业科学—林木遗传育种]