|Table of Contents|

Light Distribution Characteristics in Different Canopy Layers of Ziziphus jujuba in the Southern Xinjiang

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2023年01
Page:
41-47
Research Field:
Publishing date:

Info

Title:
Light Distribution Characteristics in Different Canopy Layers of Ziziphus jujuba in the Southern Xinjiang
Author(s):
WU Zhengbao; XIE Yali; LUO Da
(Institute of Economic Forestry,Xinjiang Academy of Forestry Sciences,Urumqi,Xinjiang 830000)
Keywords:
Ziziphus jujuba Mill.cv.‘Huizao’; canopy; photosynthetic and fluorescence characteristic; net photosynthetic rate; fruit hanging rate
PACS:
-
DOI:
10.11937/bfyy.20221858
Abstract:
The diurnal variation of photosynthetic fluorescence characteristic parameters and fruit setting of mature jujube(Ziziphus jujuba Mill.cv.‘Huizao’) leaves with different canopy layers were studied,in order to construct the high light efficiency planting mode and tree structure of dense planting jujube garden in southern Xinjiang.The results showed that the diurnal variation curves of net photosynthetic rate (Pn) in different canopy showed a ‘bimodal’ curve,and the diurnal mean value of Pn showed that canopy Ⅰcanopy Ⅱ>canopy Ⅲ,while the daily change curve of stomatal limit (Ls) of leaves in different canopy layers was just opposite.From the whole water use efficiency (WUE) change curve,canopy Ⅲ>canopy Ⅱ>canopy Ⅰ.The chlorophyll fluorescence parameters in different canopy layers were different,the upper leaves showed higher advantages in light inhibition,the middle layer and the lower layer were the weakest.The fruit setting in different canopy layers was significantly different (P<0.01).The fruit hanging rates of canopy Ⅰ,Ⅱ,Ⅲ were 0.39,0.53 and 0.99 fruit per fruiting shoot,respectively.In order to improve the quality of jujube fruit,densely planted jujube orchard in Southern Xinjiang should adopt reasonable measures to improve the overall light transmittance of jujube orchard,as well as pruning from top to bottom and thinning branches in the inner chamber to keep enough light flux.

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Last Update: 2023-01-28