Abstract
Present study introduced a new method to manipulate broiler chicken growth and metabolism by mixing the growth-advantage LED. We found that the green/blue LED mixed light system (G-B and G × B) have the similar stimulatory effect on chick body weight with single green light and single blue light (G and B), compared with normal artificial light (P = 0.028). Moreover, the percentage of carcass was significantly greater in the mixed light (G × B) when compared with the single light (P = 0.003). Synchronized with body weight, the mixed light (G-B and G × B) had a significant improved influence on the feed conversion of birds compared with normal light (P = 0.002). A significant improvement in feed conversion were found in mixed light (G × B) compared with single LED light (P = 0.037). G group resulted in a greater high-density lipoprotein cholesterol level than B group (P = 0.002), whereas B group resulted in a greater low-density lipoprotein cholesterol level than G group (P = 0.017). The mixed light significantly increased the birds’ glucose level in comparison with the single light (P = 0.003). This study might establish an effective strategy for maximizing growth of chickens by mixed LED technology.
Highlights
With impacts of climate change, issues such as more frequent and serious droughts, floods, and storms as well as diseases are becoming more serious threats to agriculture
Circadian regulation of energy homeostasis is controlled by an endogenous biological clock, located in the suprachiasmatic nuclei (SCN) of the hypothalamus, that is synchronized by photic information that travels directly from light-sensitive ganglion cells in the retina to the SCN, thereby entraining individuals’ physiology and behavior to the ambient light[13]
Further we reported that monochromatic light-emitted dioxide (LED) light can affect growth of the chicken broilers[15]
Summary
With impacts of climate change, issues such as more frequent and serious droughts, floods, and storms as well as diseases are becoming more serious threats to agriculture. Compare to incandescent light’s 1000-h and fluorescent light’s 8000-h life span, LEDs have a very significantly longer life of 100,000 h In addition to their long life, LEDs have many advantages over conventional light source. These advantages include small size, specific wavelength, low thermal output, adjustable light intensity and quality, as well as high photoelectric conversion efficiency. Such advantages make LEDs perfect for supporting chick growth in controlled environment. Studies in our laboratory indicated that light period[9] and light intensity[14] emitted by LEDs showed a significant influence on the growth and behavior of the chicken broilers. Short wavelength light (monochromatic green LED light and blue LED light) have been reported to stimulate growth of broilers compare with normal white light[15]
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