不同颜色LED光对苏系长毛兔毛品质及皮肤毛囊发育的影响

doi:10.11843/j.issn.0366-6964.2021.09.017

Abstract

Abstract: The experiment was designed to investigate the effects of LED lights on the fiber quality and skin follicle development of Su line Angora rabbits. A total of 50 three-month-old Su line Angora rabbits with body weight of (2.245±0.296) kg were randomly assigned to 5 different groups, 5 replicates in each group and 2 rabbits in each replicate. Treatment groups were exposed to red, green and blue LED lights with the same intensities (50 lx) and 16 h light (L):8 h dark (D) photoperiod regimes. Black group was exposed in dark environment. Control group was exposed to natural light. The trial lasted for 73 days. At the end of the trial, wool samples were taken to determine the quality of fiber, blood samples were collected to determine hormonal indicators, and skin tissue was taken to observe hair follicle development. Results showed that:1) All treatments had no significant effect on final weight, average daily gain (ADG) and feed intake (P>0.05), but red group improved the wool yield, which was higher than control, green and black groups (P=0.050). 2) The shoulder fiber length of red group was significantly improved, and was 35.36% longer than control and green groups (P<0.05). Ratio of coarse fiber in red group was significantly reduced (P<0.05), and was lower than that in green group. Diameter of coarse fiber in control group was significantly smaller than green and black groups (P<0.05). Diameter of fine fiber in red group was the finest, and there was no significant difference among groups (P>0.05). Moisture content had no significant difference among groups (P>0.05). 3) Compared with control group, red group could significantly increase the concentration of serum melatonin (MT) and triiodothyronine (T3) (P<0.05), and black group significantly decreased the concentration of prolactin (PRL) (P<0.05). 4) The tissue sections showed that red group had the largest number of hair follicle groups (16.5), and each group was composed of many secondary hair follicles and very few primary hair follicles, and equally distributed. The structure of hair follicles in control, blue and black groups were at normal level. Green group had the lowest number of hair follicles groups (10.0) and the distribution was uneven. The results indicated that LED red light can promote the secretion of MT, increase the number of hair follicle groups and secondary hair follicles in the skin tissue of Su line Angora rabbits, so as to improve the quality of fibers.

Key words: Su line Angora rabbits, LED light, fiber quality, hair follicle development

CLC Number:

S829.11

QIN Feng, WANG Jing, ZHAI Pin, PAN Xiaoqing, YANG Jie, SHAO Le, LI Jian, ZHANG Xia. Effects of Different Colours of LED Lights on the Fiber Quality and Skin Follicle Development of Su Line Angora Rabbits[J]. Acta Veterinaria et Zootechnica Sinica, 2021, 52(9): 2545-2552.

References 27

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Effects of Different Colours of LED Lights on the Fiber Quality and Skin Follicle Development of Su Line Angora Rabbits

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