孵化期不同强度绿光照对云岭红肉鸡雏鸡生长的影响OA北大核心CSTPCD

The aim of this study was to reveal the effect of different green light illuminations during incubation on the growth performance of Yunling Red Broiler chicks,so as to provide some basis for improving the growth performance of the chicks using green light illumination.In our experiment,a total of 512 hatching eggs of Yunling red broilers were randomly divided into the high intensity green light(HGL),medi-um intensity green light(MGL),low intensity green light(LGL)and control(CL)groups,with 128 hatching eggs in each group.The light intensities of the HGL,MGL and LGL groups were 250-475 lx,100-249 lx and 25-99 lx,respectively;and the hatching eggs were exposed to the green lights for 24 h each day in the incubating period from days 0 to 18.The hatching eggs of the CL group were incubated without any light.Then,the body weight,breast muscle weight,body size traits(body length,chest width,chest depth and cannon bone length)and the weight of visceral organs(heart,liver and lung)of the chicks were measured and analyzed for each group.The results showed that the body weight,pectoral muscle weight,body size traits and weight of the visceral organs of the chicks at the same age showed a general trend of"LGL＞MGL＞CL＞HGL".In the 4 groups,compared with MGL,CL and HGL groups,the body weight at the age of 42 days in the LGL group was significantly increased by 193.65 g,232.60 g and 271.73 g(P＜0.01),respectively;the breast muscle weight was signifi-cantly improved by 40.80 g,41.59 g and 51.24 g(P＜0.01),respectively;the body length was insignificantly improved by 0.48 cm,1.78 cm and 2.29 cm(P＞0.05),respectively;and the liver weight was insignificantly increased by 2.30 g,2.43 g and 2.45 g(P＞0.05),respectively.These results indicated that continuous illumination during incubation using a reasonable green light intensity(25-249 lx)was advantageous in improving the growth performance of the chicks,and the effect was best when light intensity was 25-99 lx.