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Title: | 植物工廠內仿生栽培之研究-陽光與靜電場 Study of Biomimicry in Plant Factory Focusing on Sun Light and Electrostatic Field |
Authors: | Wei-Che Huang 黃煒哲 |
Advisor: | 方煒(Wei Fang) |
Keyword: | 植物工廠,太陽光,高壓靜電場,空間電場,物理農業, plant factory,sun light,high-voltage electrostatic field,space electric field,physical agriculture, |
Publication Year : | 2019 |
Degree: | 碩士 |
Abstract: | 完全人工光型植物工廠可透過精確的環境控制,提供植物最佳的生長環境,這模擬自然生長環境的過程中,有兩大議題在前人的研究中沒有被探討過的:其一是使用的人工光源有無必要模擬太陽的光譜,其二是如果在栽培環境中提供了如自然環境中的靜電場,對於作物的栽培能否有幫助。本研究旨在探討上述兩項議題。
本研究使用三種不同光質與廠商宣稱類似太陽光譜 SunLike (B24:G35:R35:FR6) 的 LED 人工光源對橡木葉紫萵苣進行栽培,因 SunLike 的光譜中含有比例較高的遠紅光與綠光,前者抑制苗期的發展,後者用於光合作用的效率也低於紅光,育苗階段明顯不如 RWB (B22:G13:R60) 光源。遠紅光及綠光也會協同誘導植物的避陰反應,導致整體的外觀型態較鬆散。但使用 SunLike 可得較高含量的花青素。 本研究建置兩種不同的電場:正極在上方的以 “高壓靜電場” 稱之,正極在下方的以 “植物帶電栽培” 稱之。探討兩種電場建置方式的適當操作條件 (電壓、電極與栽培浮板之距離等) 以提高產量。過高的電壓或過短的電場距離均容易傷害植物,也容易影響人工光源的工作狀況。以皺葉萵苣為例,使用電場強度為 10 kV / 30 cm、放電週期為 15/15 min (開/關)、日總劑量為 400 kVh day-1 m-1的高壓電場條件,相較於其他實驗組可以有效刺激植物的生長狀況,使用電場強度為 0.5 kV / 15 cm、放電週期為 15/45 min (開/關)、日總劑量為 20 kVh day-1 m-1 的植物帶電栽培條件,相較於其他實驗組可以有效刺激植物根系生長,進而促進地上部的發展。 整體而言,在全人工光型植物工廠的應用上,人工光源的光譜選擇應視栽培目的及栽培種類而定,直接模仿太陽光的光譜不一定是最佳選擇。植物帶電栽培的電場建置方式優於高壓靜電場建置方式,以本研究植物帶電栽培實驗 4 之電場全程耗能僅為 2.5 kWh 且相對於沒有施加電場的栽培條件而言可提升 22 % 的產能。 The plant factory with artificial light can provide the optimal growth environment for plants through precise environmental control. In the process of simulating the natural growth environment, there are two major issues that have not been discussed in previous studies: first, whether the artificial light source used is necessary to simulate the spectrum of the sun. Second, whether it can be helpful for crop cultivation if it provides electrostatic field such as in the natural environment in the cultivated environment. This study aims to explore these two topics. In this study, three different light sources and an artificial light source (LED) similar to solar spectrum-SunLike (B24:G35:R35:FR6) were used to cultivate purple oak leaf lettuce. SunLike's spectrum contains a high proportion of far-red and green light, the former inhibits the development of seedling stage, the latter for photosynthesis efficiency is also lower than red light, and the seedling stage is significantly inferior to the RWB (B22:G13:R60) light source. Far-red light and green light will also synergistically induce shade avoidance characters of plants, resulting in a loose overall appearance. However, a higher level of anthocyanins is available with SunLike. This study builds two different electric fields: the anode above is called 'high-voltage electrostatic field', and the anode below is called 'plant-charged cultivation'. Exploring the appropriate operating conditions of the two electric field construction methods (voltage applied, the distance between electrode and the cultivated float, etc.) to increase yield. Excessive voltage or too close electric field distance can easily damage plants and easily affect the working condition of artificial light sources. In the case of leaf lettuce, a high-voltage electric field condition with an electric field strength of 10 kV / 30 cm, discharge period of 15/15 min (on/off) and a total daily dose of 400 kVh day-1 m-1 can effectively stimulate plant growth compared to other experimental groups. A plant-charged cultivation condition with an electric field strength of 0.5 kV / 15 cm, discharge period of 15/45 min (on/off) and a total daily dose of 20 kVh day-1 m-1 can effectively stimulate plant root growth compared to other experimental groups, and thus promote the development of the shoot. Overall, in the application of plant factory with artificial lighting, the spectral selection of artificial light sources should depend on the purpose of cultivation and the type of crop. Directly mimicking the spectrum of sunlight is not necessarily the best choice. The electric field construction method of plant-charged cultivation is better than high-voltage electrostatic field construction. The total energy consumption of the electric field in plant-charged cultivation experiment 4 in this study is only 2.5 kWh and can increase the yield by 22 % compared to the cultivation conditions in which no electric field is applied. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/21219 |
DOI: | 10.6342/NTU201903849 |
Fulltext Rights: | 未授權 |
Appears in Collections: | 生物機電工程學系 |
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