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Cultivation of spinach in hot seasons using a micro-mist-based temperature-control system

机译：使用基于微薄的温度控制系统在热季培养菠菜

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Recent trends in global warming have restricted the cropping periods in Japan, as ambient temperature during summer often rises above 35 degrees C and concomitantly, the air temperature inside a greenhouse can reach up to 50 degrees C. In this study, we investigated a strategy for reducing heat stress for sustainable greenhouse cultivation of spinach. Generally, this species is not cultivated during hot seasons due to heat-induced inhibition of growth. We compared the growth of spinach with and without a micro-mist system that produced mist with an average particle size of 10 mu m. Our system effectively reduced the temperature in the greenhouse by as much as 4.3 degrees C through the evaporation of mist. Additionally, when temperature in the control area peaked at 37.4 degrees C, the temperature in the micro-mist area was 3.7 degrees C lower. Furthermore, average soil temperature decreased maximum average soil-temperature by 0.7 degrees C and average daily humidity was approximately 5 % higher. Consequently, crop yield increased by 30 %. Finally, spinach mineral content with/without micro-mist in the hot season did not differ from that measured in spinach grown conventionally, while spinach grown in the hot season with the micro-mist system had 1.4-fold greater lutein content than spinach grown conventionally. Altogether, our results demonstrate that spinach can be cultivated even during hot seasons in greenhouses equipped with a micro-mist system, without any significant decrease in mineral or lutein content.
机译：全球变暖的最新趋势限制了日本的种植期，随着环境温度在夏季的环境温度越来越高于35摄氏度，温室内的空气温度可达50摄氏度。在这项研究中，我们调查了一个策略减少菠菜可持续温室培养的热应激。通常，由于热诱导的生长抑制，在热季节期间没有培养该物种。我们将菠菜的生长与微雾系统进行了比较，微雾系统产生了平均粒径为10μm的雾。我们的系统通过蒸发雾气有效地将温室的温度降低了4.3度。另外，当控制区域的温度在37.4摄氏度达到达到达到37.4摄氏度时，微雾区域的温度降低3.7摄氏度。此外，平均土壤温度降低了0.7摄氏度的最大平均土壤温度，平均每日湿度约为5％。因此，作物产量增加了30％。最后，菠菜矿物质含量与炎热季节中的微雾常规于菠菜种植的情况下没有差异，而在炎热的季节在微雾系统中生长的菠菜比常规种植的紫色含量比菠菜更大的叶黄素含量为1.4倍。 。完全，我们的结果表明，即使在配备微薄系统的温室的热季节，也可以培养菠菜，而无需任何显着降低矿物或叶黄素含量。

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