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Investigation of a root zone heating system for greenhouse seedling and its effects on micro-environment

文献类型： 外文期刊

作者： He, Fen 1 ; Hou, Yong 1 ; Li, Kai 1 ; Wei, Xiaoming 1 ; Liu, Yaqing 1 ;

作者机构： 1.Acad Agr Planning & Engn, Minist Agr & Rural Affairs, Beijing 100125, Peoples R China

2.Minist Agr & Rural Affairs, Key Lab Farm Bldg Struct & Construct, Beijing 100125, Peoples R China

3.Beijing Res Ctr Intelligent Equipment Agr, Beijing 100097, Peoples R China

关键词： greenhouse; root zone heating system; micro-environment; seedling; substrate temperature; air temperature

期刊名称：INTERNATIONAL JOURNAL OF AGRICULTURAL AND BIOLOGICAL ENGINEERING （ 影响因子：2.032； 五年影响因子：2.137 ）

ISSN： 1934-6344

年卷期： 2020 年 13 卷 6 期

页码：

收录情况： SCI

摘要： Under the extremely cold climatic condition, crops have to survive severe heat stress conditions, even if they are being kept in greenhouses. In the winter and spring of North China, the air and soil temperature is low inside the greenhouse, and when using a traditional heating system, the energy consumption is high. This paper reports on a study of different design solutions for a root zone heating system based on a kind of low temperature radiation material. Root zone heating systems offer increasing crop quality and productivity. A novel type of heat preservation and root zone heating system was applied in greenhouse seedling. And through multiple experiments, the effect of the root zone heating system on the ambient environment and seedbed surface was studied, and the heat preservation effect and heating uniformity were discussed. Results show that single-layer film covering on the root zone heating system can make the average temperature at night increase 1 degrees C. And the average seedbed surface and substrate temperature can increase 11.3 degrees C and 5.2 degrees C, respectively. In conclusion, the root zone heating system can effectively improve the environmental temperature of seedling and the uniformity of heating is high, which provides a strong guarantee for high-quality seedling cultivation.

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