Study on Photosynthetic Characteristics of Hybrid Mulberry in Autumn under Herbaceous Cultivation  

作　　者：Fangying XU Jinjian YU Huaqiang DONG Dezhong CHEN Jianzhong TAN 

机构地区：[1]Department of Landscape Architecture and Horticulture,Soochow University,Suzhou 215123,China [2]Jiangsu Huajia Silk Co.,Ltd.,Suzhou 215228,China

出　　处：《Agricultural Biotechnology》2023年第5期19-21,25,共4页农业生物技术(英文版)

基　　金：Supported by Suzhou Agricultural Science and Technology Planning Project (SNG2018093).

摘　　要：[Objectives]This study was conducted to clarify the physiological mechanism of growth of hybrid mulberry after autumn cutting in herbaceous cultivation.[Methods]The net photosynthetic rate(Pn),stomatal conductance(Gs),intercellular CO_(2) concentration(Ci)and transpiration rate(Tr)of leaves were measured under different treatment conditions using a Li-6400XT portable photosynthetic measurement system.[Results]After harvest of mulberry shoots in autumn,leaf Pn decreased with the extension of branch and leaf growth time,while Gs,Ci and Tr showed a trend of first increasing and then decreasing.The Pn was affected by factors such as leaf positions,mulberry varieties,cutting,and fertilization,which was manifested by the 6 th to 10 th mature leaves>the 2 nd to 4 th tender leaves,‘Nongsang 14’>hybrid mulberry,intermediate cut>uncut,and normal fertilization>no fertilization,all showing significant differences(P<0.05).Combined with the results of Gs,Ci and Tr measurements,it was found that the changes in leaf Pn were mainly related to non-stomatal factors.Timely cutting and harvesting during summer and autumn could significantly improve the photosynthetic rate of mulberry leaf,which was beneficial for extending the late autumn growth period of hybrid mulberry under herbaceous cultivation.[Conclusions]This study provides a theoretical reference for mulberry shoot harvesting techniques in summer and autumn.

关 键 词：Hybrid mulberry Herbaceous cultivation Harvest of mulberry shoots Photosynthetic rate Leaf age 

分 类 号：S682.261[农业科学—观赏园艺]