Optimization of rhizosphere cooling airflow for microclimate regulation and its effects on lettuce growth in plant factory

文献类型： 外文期刊

第一作者： Li Kun

作者： Li Kun;Zou Zhi-rong;Li Kun;Fang Hui;Cheng Rui-feng

作者机构：

关键词： air movement; environmental control; microclimate; water cooling; root and shoot growth

期刊名称：JOURNAL OF INTEGRATIVE AGRICULTURE （ 影响因子：2.848； 五年影响因子：2.979 ）

ISSN： 2095-3119

年卷期： 2021 年 20 卷 10 期

页码：

收录情况： SCI

摘要： In plant factories, the plant microclimate is affected by the control system, plant physiological activities and aerodynamic characteristics of leaves, which often leads to poor ventilation uniformity, suboptimal environmental conditions and inefficient air conditioning. In this study, interlayer cool airflow (ILCA) was used to introduce room air into plants' internal canopy through vent holes in cultivation boards and air layer between cultivation boards and nutrient solution surface (interlayer). By using optimal operating parameters at a room temperature of 28 degrees C, the ILCA system achieved similar cooling effects in the absence of a conventional air conditioning system and achieved an energy saving of 50.8% while bringing about positive microclimate change in the interlayer and nutrient solution. This resulted in significantly reduced root growth by 41.7% without a negative influence on lettuce crop yield. Future development in this precise microclimate control method is predicted to replace the conventional cooling (air conditioning) systems for crop production in plant factories.

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