Simulation model on the formation of greenhouse sweet pepper leaf area index

Leaf area index (LAI) is one of the most important crop parameters in photosynthesis-driving crop growth simulation model and canopy evapotranspiration simulation model, while air temperature and radiation are the important climate factors affecting crop leaf growth. In this paper, experiments with...

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Bibliographic Details
Published inYing yong sheng tai xue bao Vol. 19; no. 10; p. 2277
Main Authors Diao, Ming, Dai, Jian-Feng, Luo, Wei-Hong, Yuan, Chang-Mei, Bu, Chong-Xing, Xian, Kai-Mei, Zhang, Sheng-Fei, Xu, Rui
Format Journal Article
LanguageChinese
Published China 01.10.2008
Subjects
Agriculture - methods
Capsicum - growth & development
Capsicum - physiology
Environment, Controlled
Models, Biological
Photosynthesis - physiology
Plant Leaves - growth & development
Plant Leaves - physiology
Plant Transpiration
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Summary:Leaf area index (LAI) is one of the most important crop parameters in photosynthesis-driving crop growth simulation model and canopy evapotranspiration simulation model, while air temperature and radiation are the important climate factors affecting crop leaf growth. In this paper, experiments with different sweet pepper (Capsicum annuum L.) cultivars and sowing dates were conducted in greenhouse to quantitatively analyze the relationships of the number of unfolding leaves per plant, the number of old leaves removed per plant, and the length of each leaf with air temperature and radiation. Based on these quantitative relationships, a leaf area simulation model for greenhouse sweet pepper was developed, and the independent experimental data were used to validate the model. The results showed that the number of unfolding leaves per plant was a positive exponential function of the product of thermal effectiveness and PAR (TEP) accumulated after emergence, and the length of each leaf was a negative exponential fu
ISSN:1001-9332