|Table of Contents|

Effects of Oligostry on Photosynthetic Parameters and Light Response Curves of Cucumber

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2018年12
Page:
1-6
Research Field:
Publishing date:

Info

Title:
Effects of Oligostry on Photosynthetic Parameters and Light Response Curves of Cucumber
Author(s):
LI Jiashuai1;  YANG Zaiqiang1; 2 ; XUE Sijia1; JIANG Mengyuan1; ZHAO Heli1
(1.Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing，Jiangsu 210044;2. Jiangsu Provincial Key Laboratory of Agrometeorology,Nangjing ，Jiangsu 210044)
Keywords:
cucumber;  sparse sunlight;  photosynthetic characteristics;  light response curve
PACS:
-
DOI:
10.11937/bfyy.20174487
Abstract:
‘Nanza No.2’ cucumber was used as test material, the photosynthetic characteristics of cucumber leaves under light conditions were studied by using shading nets for 3 days, 6 days, 9 days and 12 days of successive widows of cucumber seedlings for 1 hour, 3 hours, and 5 hours. Using the Non-rectangular hyperbola model, the Exponential model, the Rectangular hyperbola model and the Rectangular hyperbola correction model to simulate the light response curve, the optimal model was selected to simulate the photosynthetic parameters. The purpose was providing the scientific basis for optimizing the control of planting cucumber lighting. The results showed that the Rectangular hyperbola correction model was the best, followed by the Exponential model, the non-rectangular hyperbola model, the Rectangular hyperbola model. The photosynthetic parameters were calculated by the simulated values of Rectangular hyperbola correction model. The net photosynthetic rate under sparse sunlight , maximum photosynthetic rate, light saturation point, apparent quantum efficiency, and stomatal conductance were all decreased. The transpiration rate increased first and then decreased. The light compensation point and stomatal limit values increased, and the water use efficiency decreased first and then increased. The net photosynthetic rate at 5 hours decreased by 23.56%, 45.40%, and 62.60%, respectively, compared with the control.

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Last Update: 2018-05-14