Effects of droplet size and spray interval on root-to-shoot ratio, photosynthesis efficiency, and nutritional quality of aeroponically grown butterhead lettuce
Effects of droplet size and spray interval on root-to-shoot ratio, photosynthesis efficiency, and nutritional quality of aeroponically grown butterhead lettuce
复制标题
DOI：
10.25165/j.ijabe.20221501.6725
复制
发表时间：
2021
影响因子：
2.4
通讯作者：
Mazhar Hussain Tunio;Jianmin Gao;Waqar Ahmed Qureshi;Sher Ali Sheikh;Jiedong Chen;Farman Ali Chandio;Imran Ali Lakhiar;Kashif Ali Solangi
中科院分区：
文献类型：
--
作者：
Mazhar Hussain Tunio;Jianmin Gao;Waqar Ahmed Qureshi;Sher Ali Sheikh;Jiedong Chen;Farman Ali Chandio;Imran Ali Lakhiar;Kashif Ali Solangi
正确选择雾化器（液滴大小）和营养液喷雾间隔是可持续农业气培系统中需要研究的最重要因素之一。本研究的目的是研究四种气培雾化喷嘴（一个空气辅助；A1，两个无气；A2 和 A3，以及一个超声波雾化器；A4）的效果，液滴尺寸分别为 11.24 μm、26.35 μm、17.38 μm 和 4.89 μm，四种喷雾间隔（15 分钟（I1）、30 分钟（I2）、45 分钟） (I3) 和 60 分钟 (I4))，以 5 分钟的恒定喷雾时间，通过雾化 Hoagland 营养液对气培生菜的生长、根冠比、光合作用特性、色素和营养品质进行研究。实验结果表明，在A1雾化器和I2间隔下，生菜的生长、光合作用效率、叶绿素、类胡萝卜素和营养价值均显着高于A2和A3雾化器在所有喷雾间隔下的生长。地上部的发育比根更受限制，在不同雾滴大小和喷雾间隔的影响下，根地比（新鲜和干燥）的变化尤为突出。此外，与建议的喷雾间隔相关的 A4 雾化器中植物生长不佳。结果表明，雾滴大小（雾化器）和喷雾间隔对气培生菜的生长、根与芽的比例、光合作用效率、色素和营养品质之间存在明显的相互作用。这项研究提高了人们对气培系统中种植的叶类蔬菜的适当液滴尺寸（雾化器）和营养液喷雾间隔调节的认识。
The proper selection of the atomizer (droplet size) and nutrient solution spray interval is one of the most important factors to be investigated in aeroponics systems for sustainable agriculture. The aim of this study was to research the effects of four aeroponics atomizing nozzles (one air-assisted; A1, two air-less; A2 and A3, and one ultrasonic fogger; A4) with droplet sizes of 11.24 μm, 26.35 μm, 17.38 μm, and 4.89 μm, respectively, four spray intervals (15 min (I1), 30 min (I2), 45 min (I3) and 60 min (I4)) at a 5 min of constant spray time by atomizing the Hoagland’s nutrient solution on growth, root-to-shoot ratio, photosynthesis characteristics, pigments, and nutritional quality of the aeroponically grown lettuce. The experimental results demonstrated that in A1 atomizer and I2 interval, the growth, photosynthesis efficiency, chlorophyll, carotenoids, and nutritional values of the lettuce were significantly higher compared to that grown in A2 and A3 atomizers at all spray intervals. The shoot developments were more constrained than root, prominent to the alteration of root-to-shoot ratio (fresh and dry) in the influence of different droplet sizes and spray intervals. Moreover, the plants did not grow well in A4 atomizer associated with proposed spray intervals. The results disclosed that there was an obvious interaction between droplet sizes (atomizers) and spray intervals for growth, the ratio of root to shoot, photosynthesis efficiency, pigments, and nutritional quality of the aeroponically grown lettuce. This research study increases the awareness of the proper droplet size (atomizer) and the regulation of nutrient solution spray interval for leafy vegetables grown in an aeroponics system.