Effects of Light Intensity on Growth and Quality of Lettuce and Spinach Cultivars in a Plant Factory
文献类型： 外文期刊
作者： Miao, Chen 1 ; Yang, Shaojun 2 ; Xu, Jing 3 ; Wang, Hong 1 ; Zhang, Yongxue 1 ; Cui, Jiawei 1 ; Zhang, Hongmei 1 ; Jin, Haijun 1 ; Lu, Panling 1 ; He, Lizhong 1 ; Zhou, Qiang 1 ; Yu, Jizhu 1 ; Ding, Xiaotao 1 ;
作者机构： 1.Shanghai Acad Agr Sci, Hort Res Inst, Shanghai Key Lab Protected Hort Technol, Jinqi Rd 1000, Shanghai 201403, Peoples R China
2.Shanghai Youyou Agr Technol Co Ltd, Yuanqu South Rd 1000, Shanghai 202150, Peoples R China
3.Shanghai Inst Technol, Dept Hort, Haiquan Rd 100, Shanghai 201418, Peoples R China
关键词： indoor cultivation; LED light intensity; plant development; photosynthesis; nutrient content; tipburn
期刊名称：PLANTS-BASEL （ 影响因子：4.5； 五年影响因子：4.8 ）
ISSN：
年卷期： 2023 年 12 卷 18 期
页码：
收录情况： SCI
摘要： The decreased quality of leafy vegetables and tipburn caused by inappropriate light intensity are serious problems faced in plant factories, greatly reducing the economic benefits. The purpose of this study was to comprehensively understand the impact of light intensity on the growth and quality of different crops and to develop precise lighting schemes for specific cultivars. Two lettuce (Lactuca sativa L.) cultivars-Crunchy and Deangelia-and one spinach (Spinacia oleracea L.) cultivar-Shawen-were grown in a plant factory using a light-emitting diode (LED) under intensities of 300, 240, 180, and 120 & mu;mol m-2 s-1, respectively. Cultivation in a solar greenhouse using only natural light (NL) served as the control. The plant height, number of leaves, and leaf width exhibited the highest values under a light intensity of 300 & mu;mol m-2 s-1 for Crunchy. The plant width and leaf length of Deangelia exhibited the smallest values under a light intensity of 300 & mu;mol m-2 s-1. The fresh weight of shoot and root, soluble sugar, soluble protein, and ascorbic acid contents in the three cultivars increased with the increasing light intensity. However, tipburn was observed in Crunchy under 300 & mu;mol m-2 s-1 light intensity, and in Deangelia under both 300 and 240 & mu;mol m-2 s-1 light intensities. Shawen spinach exhibited leaf curling under all four light intensities. The light intensities of 240 and 180 & mu;mol m-2 s-1 were observed to be the most optimum for Crunchy and Deangelia (semi-heading lettuce variety), respectively, which would exhibit relative balance growth and morphogenesis. The lack of healthy leaves in Shawen spinach under all light intensities indicated the need to comprehensively optimize cultivation for Shawen in plant factories to achieve successful cultivation. The results indicated that light intensity is an important factor and should be optimized for specific crop species and cultivars to achieve healthy growth in plant factories.
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