Influence of canopy structure on light interception and productivity of greenhouse cucumber

冠层结构对温室黄瓜截光及生产力的影响

• 批准号: 19247411
• 负责人: Professor Dr. Hartmut Stützel
• 金额: --
• 依托单位: Institut für Gartenbauliche Produktionssysteme
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2006
• 资助国家: 德国
• 起止时间: 2005-12-31 至 2010-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/19247411?language=en
• 关键词: Influence; canopy; structure; light; interception

In greenhouse vegetable production where temperature, CO2, water and nutrients can be regulated towards optimal supply, light interception is the major factor limiting productivity. In these crops, canopy architecture can be designed by plant distribution or pruning, making functional-structural plant models an interesting option for the evaluation of the relationships between canopy architecture, light interception and productivity. Cucumber with its distinct row structure exemplify spatially heterogeneous canopies. The aim of this project is to develop a model that allows to study the effects of canopy architecture on light interception, photosynthesis and dry matter partitioning in cucumber. While the structural part is presently under development, the modules for radiation transfer, photosynthesis and assimilate allocation are to be developed and coupled within the proposed project. To represent the spatial heterogeneity, processes will be described on an organ basis. Five experiments will be conducted in which canopy structure is determined by electromagnetic digitising, and spatial light distribution, photosynthesis and dry matter partitioning are measured. Data are used to parameterise and evaluate the three modules.

在温室蔬菜生产中，温度、二氧化碳、水和养分可以调节到最佳供应，光拦截是限制生产力的主要因素。在这些作物中，冠层结构可以通过植物分布或修剪来设计，使功能-结构植物模型成为评估冠层结构、光拦截和生产力之间关系的有趣选择。黄瓜以其独特的行结构体现了空间异质性冠层。本项目旨在建立一个模型，研究冠层结构对黄瓜截光、光合作用和干物质分配的影响。虽然结构部分目前正在开发中，但辐射转移、光合作用和同化分配的模块将在拟议的项目中开发和结合。为了表示空间异质性，将以器官为基础描述过程。利用电磁数字化技术确定冠层结构，测量空间光分布、光合作用和干物质分配等5项实验。数据用于参数化和评估这三个模块。

项目成果

Evaluation of a radiosity based light model for greenhouse cucumber canopies

• DOI: 10.1016/j.agrformet.2011.02.016
• 发表时间: 2011-07
• 期刊: Agricultural and Forest Meteorology
• 影响因子: 6.2
• 作者: Dirk Wiechers;K. Kahlen;H. Stützel