|Table of Contents|

Relationship of Water-nitrogen Coupling Between Canopy Light Distribution and Leaf Area Index on Jujube in Pot

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2019年12
Page:
20-26
Research Field:
Publishing date:

Info

Title:
Relationship of Water-nitrogen Coupling Between Canopy Light Distribution and Leaf Area Index on Jujube in Pot
Author(s):
SHENG Tongmin1; MA Yingjie2
(1.Xinjiang Research Institute of Water Resources and Hydropower，Urumqi,Xinjiang 830049;2.College of Water Conservancy and Civil Engineering,Xinjiang Agricultural University,Urumqi,Xinjiang 830052)
Keywords:
jujube in pot; canopylight distribution; leaf area index; water-nitrogen coupling; regression models; HemiView system
PACS:
-
DOI:
10.11937/bfyy.20183592
Abstract:
Taking jujube tree planted in barrel at the base of Xinjiang Agricultural University of Hongqipo Farm in Aksu area as research object，the correlation between light distribution and leaf area index (LAI) under 6 treatments of three different irrigations volume (W1,20 mm；W2,30 mm;W3,40 mm) and four nitrogen levels (N1，standard nitrogen application rate 60%；N2，standard nitrogen application rate 80%；N3，standard nitrogen application rate 100%；N4，standard nitrogen application rate 120%) were studied by used HemiView digital plant canopy analysis system.The regression model of canopy light parameters and LAI was established.The results showed that the transmittance，direct light site coefficient (DSF) and scattered light site coefficient (ISF) of jujube trees decreased at first and then increased during the growth period.There was no significant difference in leaf area index among different treatments in the early growth stage.The variation of leaf area index between the middle growth stage and the later growth stage was obviously increased and then decreased，which was opposite to the canopy light parameters.The DSF，ISF and LAI of different water and nitrogen coupling were fitted with multiple linear regression model，and the adjusted decision coefficient was higher (R2>0.916).

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Last Update: 2019-07-17