Influence of Atomization Nozzles and Spraying Intervals on Growth, Biomass Yield, and Nutrient Uptake of Butter-Head Lettuce under Aeroponics System
Influence of Atomization Nozzles and Spraying Intervals on Growth, Biomass Yield, and Nutrient Uptake of Butter-Head Lettuce under Aeroponics System
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DOI：
10.3390/agronomy11010097
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发表时间：
2021-01
期刊：
影响因子：
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通讯作者：
M. Tunio;Jianmin Gao;Imran Ali Lakhiar;Kashif Solangi;W. Qureshi;S. Shaikh;Jiedong Chen
中科院分区：
文献类型：
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作者：
M. Tunio;Jianmin Gao;Imran Ali Lakhiar;Kashif Solangi;W. Qureshi;S. Shaikh;Jiedong Chen
雾化营养液液滴尺寸和喷雾间隔可影响营养液的化学性质、生物量产量、根冠比和气培栽培植物的营养吸收。在本研究中，选择液滴尺寸为N1 = 11.24、N2 = 26.35、N3 = 17.38和N4 = 4.89 µm的四种不同喷嘴，并以30、45和60 min的三种营养液喷雾间隔雾化，喷雾时间为5 min。测定的参数为营养液的pH值和电导率（EC）值、地上部和根系的生长、根与地上部（鲜和干）的比率、生物量产量和养分吸收。结果表明，N1处理的土壤理化性质变化显著小于N2、N3和N4处理，有利于侧根的稳定生长和生物产量的提高。此外，根冠比显着增加喷雾间隔使用N1和N4喷嘴。N1喷嘴也揭示了一个显着的影响，磷，钾和镁的吸收植物雾化在建议的营养液喷洒间隔。然而，超声波喷嘴显示出一个不显着的影响，所有测量参数的喷雾间隔。最后，本研究验证了气辅喷嘴（N1）雾化在雾培系统中以30 min的喷雾间隔和5 min的喷雾时间进行雾培的适用性。
The atomized nutrient solution droplet sizes and spraying intervals can impact the chemical properties of the nutrient solution, biomass yield, root-to-shoot ratio and nutrient uptake of aeroponically cultivated plants. In this study, four different nozzles having droplet sizes N1 = 11.24, N2 = 26.35, N3 = 17.38 and N4 = 4.89 µm were selected and misted at three nutrient solution spraying intervals of 30, 45 and 60 min, with a 5 min spraying time. The measured parameters were power of hydrogen (pH) and electrical conductivity (EC) values of the nutrient solution, shoot and root growth, ratio of roots to shoots (fresh and dry), biomass yield and nutrient uptake. The results indicated that the N1 presented significantly lower changes in chemical properties than those of N2, N3 and N4, resulting in stable lateral root growth and increased biomass yield. Also, the root-to-shoot ratio significantly increased with increasing spraying interval using N1 and N4 nozzles. The N1 nozzle also revealed a significant effect on the phosphorous, potassium and magnesium uptake by the plants misted at proposed nutrient solution spraying intervals. However, the ultrasonic nozzle showed a nonsignificant effect on all measured parameters with respect to spraying intervals. In the last, this research experiment validates the applicability of air-assisted nozzle (N1) misting at a 30-min spraying interval and 5 min of spraying time for the cultivation of butter-head lettuce in aeroponic systems.