Growth Control of Leaf Lettuce Using Pulsed Electric Field
Growth Control of Leaf Lettuce Using Pulsed Electric Field
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DOI：
10.1109/tps.2014.2326599
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发表时间：
2014-06
影响因子：
1.5
通讯作者：
T. Sonoda;N. Takamura;Douyan Wang;T. Namihira;H. Akiyama
中科院分区：
文献类型：
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作者：
T. Sonoda;N. Takamura;Douyan Wang;T. Namihira;H. Akiyama
日本的农业正面临危机，原因有二：自给率下降和农业工人人数减少。为了解决这些问题，植物工厂最近引起了人们的关注。植物工厂是通过人工控制栽培环境，使种植者能够大幅减少生产时间，从而全年稳定生产高品质蔬菜的设施。尽管植物工厂有许多优点，但一个主要障碍是降低初始和运行成本。本研究以生菜（早熟）为对象，针对其价格相对较高的特点，以提高植物工厂的生产效率为目的，将各种脉冲电场（PEFs）施加到莴苣的根部以增加莴苣生长速率。实验结果表明，在0.2 ~ 1.0kV/cm范围内的PEF强度对生长刺激是积极的。相反，超过1.0 kV/cm的电压导致生长抑制。此外，表现出叶重增加的样品的根生长更健壮比叶重减少的样品。此外，分析结果表明，施用PEF前后施用液体肥料的效果无显著差异。结果表明，脉冲电场不影响液肥的成分变化，但直接影响叶用莴苣的生长。
Agriculture in Japan is approaching a crisis for two reasons: a declining self-sufficiency rate and a decreasing number of agriculture workers. To solve these problems, plant factories have been attracting attention recently. Plant factories are facilities that aid the steady production of high-quality vegetables year round by artificially controlling the cultivation environment, allowing growers to drastically decrease production time. Despite the many advantages of plant factories, a main impediment is the reduction of initial and running costs. This paper utilizes leaf lettuce (Early impulse), which is a typical item cultivated in plant factories, as a target to improve productive efficiency of plant factories due to its relatively high price. Various pulsed electric fields (PEFs) were applied to roots of the lettuce to increase lettuce growth rate. The experimental results show PEF intensity from 0.2 to 1.0 kV/cm is positive for growth stimulation. Conversely, those over 1.0 kV/cm resulted in growth inhibition. Furthermore, roots of the samples which exhibited increased leaf weight grew more robustly than those of decreased leaf weight. In addition, analysis results showed that there was no significant difference when liquid fertilizer was applied prior to or after application of PEF. The results suggest that PEF does not affect the composition change of liquid fertilizer but directly influences the growth of leaf lettuce.