|Table of Contents|

Effects of Different Light Intensity Treatments on Growth and Field Characters of Pumpkin Seedlings

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2021年15
Page:
7-13
Research Field:
Publishing date:

Info

Title:
Effects of Different Light Intensity Treatments on Growth and Field Characters of Pumpkin Seedlings
Author(s):
YAN Xiaowen1; 2; LIU Zhenwei1; 2; SUN Li1; 2; LI Xinzheng1; 2
(1.School of Horticulture and Landscape Architecture,Henan Institute of Science and Technology,Xinxiang,Henan 453003;2.Henan Province Engineering Research Center of Horticultural Plant Resource Utilization and Germplasm Enhancement,Xinxiang,Henan 453003)
Keywords:
red and blue light; light intensity; pumpkin; physiological indicators; photosynthetic characteristics
PACS:
-
DOI:
10.11937/bfyy.20205506
Abstract:
Baimi No.5’ pumpkin seeds were taken as materials,under a certain ratio of red and blue light (R∶B=9∶1),six different light intensities (80,120,160,200,240,280 W·m-2) were set,and the ordinary daylight was used as control (CK).The effects of LED red and blue light on the growth and field characters of pumpkin seedlings under different light intensities were studied,in order to provide a reference for finding the optimum light source and cultivating high quality pumpkin seedlings.The results showed that the soluble sugar,soluble protein,net photosynthetic rate (Pn) and stem length of pumpkin seedlings reached the maximum when the light intensity was 280 W·m-2.When the light intensity was 160 W·m-2,the root activity,stem diameter,aboveground and underground fresh weight and aboveground dry weight were the maximum;when the light intensity was 120 W·m-2 stomatal conductance (Gs),root length and seedling index were the maximum;when the light intensity was 200 W·m-2,the MDA content reached the lowest value,and when the light intensity was 240 W·m-2,the true leaf number,underground dry weight and root-shoot ratio reached the maximum value.In summary,the light intensity in the range from 120 W·m-2 to 160 W·m-2 was suitable for the growth of roots and seedlings at the rooting stage of pumpkin seedlings.The light intensity in the range from 200 W·m-2 to 280 W·m-2 was conducive to the growth and development of pumpkin seedlings at other stages.

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Last Update: 2021-11-18