Effect of Different Root Stock on Catalpa fargesii Bur Growth and Photosynthetic Characteristics
An experiment was conducted to study five different root stocks of Catalpa fargesii Bur clone growth and photosynthetic physiological characteristics .Five different root stocks of Catalpa fargesii Bur clones have a greater influence on the growth and photosynthetic physiological characteristics , and different root stock has a great influence on the growth of ash late Ca-talpa fargesii Burclones .The growth sequence is Ca talpa vo ata>Catalpa bungei>Catalpa speciosa>Catalpa duclouxii>Ca-talpa fargesii.Catalpa fargesii growth with Catalpa ovata of root stock is better, and its growth with Catalpa fargesii of root stock is worst.There is significant difference of net photosynthetic rate between different root stocks of Catalpa fargesii Bur clones, and the order is Catalpa ovata>Catalpa speciosa>Catalpa bungei>Catapl a duclouxii>Ca talpa far gesii.Catalpa fargesii clones belong to the group of high net photosynthetic rate.Netphotosynthetic rate and stomatal conductance , tran-spiration rate,water use efficiency (wue)are positively correlated, but not significantly, and the intercellular CO2 content shows no significantly negative correlation.Net photosynthetic rate andthe specific leaf weight was not significanty negative correlation.There is significant difference of of transpiration rate betweendifferent root stocks of Catalap fargesii Bur clones.With Catalpa ovata root stock, transpiration rate is minimum, and the transpiration rate is bigger with Catalpa fargesii root stock.Catalpa fargesii Bur clonetranspiration rate order of five different root stock is Catalpa fargesii>Catalpa duclouxii>Catalpa speciosa>Catalpa bungei>Catalpa ovata.Different root stock of Catalpafa rgesii Bur clones belongs to high water consumption group, and the cultivation management should strengthen the management of water.Biological fac-tors influence ecological factors with each other, but work together.The biggest factors on net photosynthetic rate of five different root stocks are transpiration rate and stomatal conductance .
Different root stockCatalpa fargesii BurClonePhotosynthetic characteristics
NETL
NSTL
万方数据
维普
