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研究生:王盛皇
研究生(外文):Wang, Sheng-Huang
論文名稱:不同LED光源與養液濃度對萵苣生長之影響
論文名稱(外文):Effects of Different LED Panels and Concentrations of Nutrient on Growth of Lettuce
指導教授:苗志銘苗志銘引用關係
指導教授(外文):Miao, Jr-Ming
口試委員:李達生鄭善仁邱相文苗志銘
口試委員(外文):Lee, Da-ShengCheng, Shan-JenChiu, Shiang-WenMiao, Jr-Ming
口試日期:2017-07-18
學位類別:碩士
校院名稱:國立屏東科技大學
系所名稱:生物機電工程系所
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:2017
畢業學年度:105
語文別:中文
論文頁數:48
中文關鍵詞:萵苣發光二極體水耕栽培硝酸鹽SPAD
外文關鍵詞:LettuceLEDhydroponicNitrateSPAD
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隨著全球氣候極端的變化,傳統的露天栽培模式對於農產品的提供越來越不穩定,風險隨之增高,所以設施園藝、植物工廠逐漸受到重視,主要原因是搭配人工光源與無土栽培技術可以克服許多自然環境不確定的因素。本論文希望藉由感測器以及影像辨識,了解在生長週期中植物與營養液兩者的變化,並比較不同LED光源以及養液濃度對萵苣生長的影響。使用香波綠火焰萵苣作為實驗對象,在兩種LED光源下種植,並在定植期使用不同的養液濃度與有無控制pH值條件,交互比較不同的LED光源(DPN、DMP)與養液條件對萵苣生長之影響。
從實驗中發現,營養液pH值前兩天會有上升的趨勢,之後開始逐漸下降,到中後期的時候會發生轉變而逐漸升高。EC則是在三次實驗中都沒有明顯的變化。
比較種植結果發現,DPN燈具組都比DMP燈具組有更高的地上部鮮重,但是卻也都有更高的硝酸鹽含量,而兩種光源對於葉片SPAD值並沒有顯著的影響。兩種養液濃度對於植株地上部鮮重、乾重、硝酸鹽含量都無顯著的影響。有控制pH組的SPAD值顯著高於無控制pH組,推測為其吸收氮素效率較高,但就香波綠火焰萵苣而言,其對於pH值的耐受性較高,在pH4~7之間都可以正常生長,以經濟角度來看對於pH調控並不需要太頻繁。
植株的葉投影面積會以二次曲線的方式成長,在中後期會顯著的上升,在量產時可以藉由此參數預測與判斷植株的生長情況,而未來的研究目標也可以放在如何讓植物生長轉捩點提前,進而縮短培養時間,增加經濟效益。
With the extreme change of the global climate, the traditional open field cultivation models become more and more unstable for the supplement of agricultural products. The risk is higher than earlier stage, so agriculture policy gradually paid more attention on protected agriculture system and plant factory. The major reason is that artificial light sources and soilless cultivation techniques can overcome many uncertainties for plant growth in the natural environment. In this thesis, we hope to understand the relationship between changes of plant organs and nutrient solution in the growth cycle by installed several sensors and image recognition device. Some discussions are based on comparing the effects of different LED light sources and nutrient concentration on lettuce growth. Lettuce was used as the experimental subject and planted under two different LED light sources. The effect of different nutrient concentrations and pH values with/without controlled during the growth period are also studied. The effects of different LED light sources (DPN, DMP) and nutrient solution on lettuce growth were compared from biomass measurements.
From the experimental results, we found that the pH value of nutrient solution rose in the first two days, decreased gradually, and finally the pH value rose gradually in the late stage. The results also showed that the lettuces grew under the DPN lamps had higher aboveground fresh weight than the lettuces grew under the DMP lamps, but they also had higher nitrate content. The two light sources had less significant influence on the SPAD value of the leaves. The two concentration of plant liquid had no significant influence on the fresh weight, dry weight and nitrate content. The SPAD values in the cases of controlled pH group were significantly higher than those in the uncontrolled pH group, suggesting that the nitrogen uptake rate was higher. The Lettuce can grow normally between pH4~7. In economic terms, pH regulation does not need to be very frequent in present hydroponic system.
The measured leaf projected area of the plant with respect to the time exhibited a second-order curve. A significantly enlargement in the leaf area can be observed in the later stage. For mass production management, the measured plant growth curve can be used to predict the post-harvesting time and the lettuce status can be judged by the tested parameters. For he future, the research goals can should be focused on how to shorten the growth time of plants with more techniques in the hydroponic system.
摘要 I
ABSTRACT III
謝誌 V
目錄 VI
表目錄 IX
圖目錄 X
符號索引 XII
第一章 緒論 1
1.1 研究背景與動機 1
1.2 研究目的 1
1.3 論文架構 1
第二章 文獻探討 3
2.1 設施農業 3
2.2 設施農業種類 3
2.3 國內外植物工廠發展現況 4
2.4 小型自動化控制系統與栽培箱 5
2.5 LED特點與發光原理 6
2.6 光對植物的影響 6
2.6.1 光質對植物的影響 7
2.6.2 光強度對植物的影響 8
2.6.3 光週期對植物的影響 8
2.7 無土栽培 9
2.8 水培栽培方式 10
2.9 營養液的組成與濃度 10
2.10 營養液的PH值 12
2.11 硝酸鹽 13
2.12 葉綠素含量指數(SPAD) 14
第三章 材料與方法 15
3.1 實驗材料 15
3.2 光源選擇 15
3.3 儀器與設備 19
3.4 實驗方法 24
3.4.1 育苗 24
3.4.2 定植 24
3.5 量測方法 26
3.5.1 數據量測 26
3.5.2 葉面積 27
3.5.3 硝酸鹽含量量測 27
3.5.4 葉綠素含量(SPAD)量測 28
3.6 資料整理與分析 28
第四章 結果與討論 29
4.1 營養液PH值的變化 29
4.2 營養液EC值的變化 31
4.3 不同LED光源對萵苣生長之影響 33
4.4 不同LED光源對萵苣葉面積之影響 34
4.5 不同養液濃度對萵苣生長之影響 38
第五章 結論與建議 39
5.1 結論 39
5.2 建議 39
參考文獻 41
作者簡介 48
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