臺灣博碩士論文加值系統

光波長對於肉雞的生長性能有著影響，本研究探討不同波長和日常波長轉換對雞的影響。雞種選用愛拔益加，被隨機分配到6組實驗，每個實驗飼養10隻進行三重複試驗。為比較波長變換的效果，波長變換分組如下，A組：10日齡前全程給予綠光，11日後全程給予藍光、B組：每日3小時綠光後變換1小時紅光後再變換為藍光3小時循環、C組：每日3小時綠光後給予3小時藍光為一循環、D組：每日11小時綠光後轉換成藍光12小時、E組：10日齡前給予綠光，11日後給予藍光，每日3小時轉變1小時紅光、F組:每日11小時綠光後給予1小時紅光再轉換給予藍光11小時。紀錄各組雞隻單隻體重，各籠飼料消耗重及計算飼料轉換率，在第35天觀察雞隻步態行為，給予評分，並觀察雞隻是否有患腳步病變的情形。結果顯示，利用波長轉換的刺激可以誘發雞隻的活動，減少腿部病變的發生率，因此提高了雞隻整體飼養的動物福利；而光波長要較光強度更能刺激雞隻的活動效果。

Wavelengths play an important role in the behavior and psychology of chickens. This study examines the influence that different wavelengths and daily wavelength conversions have on chickens. The chicks, all of which were Arbor Acres, were randomly assigned to six experiments, with each experiment making use of 10 birds over a course of three repeated trials. The light source made use of LEDs. The wavelength conversion groupings of each test group were as follows: Group A: After being given green light for their first 10 days, from the 11th day onward this group was given blue light; Group B: Given a cycle consisting of green light for 3 hours, followed by red light for 1 hour and blue light for 3 hours; Group C: Given a cycle consisting of 3 hours of green light and 3 hours of blue light; Group D: Given 11 hours of green light, followed by 12 hours of blue light; Group E: After being given green light for 10 days, from the 11th day onward they were given a cycle consisting of 3 hours of blue light, and 1 hour of red light; Group F: Given a cycle consisting of 11 hours of green light, 1 hour of red light and 11 hours of blue light. Records were made of BW and feed consumption. On the 35th day, assessments of leg weakness were made when ability to walk and gait scoring were measured. Observations were also made to determine whether or not the chickens were at risk of footpad dermatitis or ankle injuries. Results indicated that using wavelength conversion stimulation could induce chickens to undertake more locomotive activity. It had a positive effect in terms of incidence of leg lesions, which decreased and therefore raised the overall well-being of the chickens.

CONTENTS
Acknowledgements i
摘 要 ii
Abstract iii
TABLE OF CONTENTS vii
FIGURE OF CONTENTS viii
Chapter 1 Introduction 1
1-1 The study background 1
1.2 Objectives 3
Chapter 2 Literature Review 5
2.1 Wavelength 5
2.2 Light and Behavior 10
2.2.1 Photoperiod 10
2.2.2 Intensity 12
2.2.3 Sources and Wavelength 13
2.3 Welfare 15
2.4 LED and other Light Sources 20
2.5 Research Niche 22
Chapter 3 The Effect of Wavelength Conversions on Broiler Growth and Leg Disorders 25
3.1 Materials and Methods 25
3.1.1 Animals, Housing and Feeding 25
3.1.2 Light Schedule 26
3.1.3 Production Data and Gait Abnormalities 28
3.2 Results and Discussion 30
Chapter 4 The Effect of Wavelength Conversions and Itensity on Broiler Growth and Leg Disorders 39
4.1 Materials and Methods 39
4.2 Results and Discussion 40
Chapter 5 Conclusions and Recommendations 44
Reference 47
TABLE OF CONTENTS
Table 3-1 Descriptions of observed behaviors 29
Table 3-2 Differences in light wavelength and body weight 36
Table 3-3 Differences in optical wavelength, feed conversion, GS and mortality rates 37
Table 3-4 Description of each behaviour in Experiment 1 and its general contribution (%) to the total time-budget irrespective of any of the experimental factors 38
Table 4-1 Differences in optical wavelength, feed conversion, GS and mortality rates 42
Table4-2 Description of each behaviour in Experiment 2 and its general contribution (%) to the total time-budget irrespective of any of the experimental factors 43
FIGURE OF CONTENTS
Figure 2-1 Electromagnetic Spectrum 23
Figure 2-2 The advantage of avian vision evolution 23
Figure 2-3 Foot Pad Dermatitis (FPD) 24
Figure 2-4 Hook Burn 24

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