Study on Photosynthetic Characteristics of Hybrid Mulberry in Autumn under Herbaceous Cultivation
刊名 Agricultural Biotechnology
作者 Fangying XU, Jinjian YU ,Huaqiang DONG ,Dezhong CHEN ,Jianzhong TAN
作者单位 Department of Landscape Architecture and Horticulture Jiangsu Huajia Silk Co.
DOI DOI:10.19759/j.cnki.2164-4993.2023.05.004
年份 2023
刊期 5
页码 19-21,25
关键词 Hybrid mulberry; Herbaceous cultivation; Harvest of mulberry shoots; Photosynthetic rate; Leaf age
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 CO2 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.