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ThesisItem Open Access Effect of dietary supplementation of chili (Capsicum annuum) leaf powder on performance of Rhode Island red laying hens(G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2022-07) Abhilasha; Mondal, B.C.The present study was carried out to discern the effect of dietary supplementation of chili (Capsicum annuum) leaf powder on growth, nutrient utilization, haemato- biochemical parameters, egg quality parameters and economics of egg production of Rhode Island Red laying hens. A feeding trial of 12 weeks duration was conducted on seventy- two, 28 weeks old Rhode Island Red laying hens. Hens were randomly distributed into four treatment groups with 18 birds per treatment having three replicates of 6 birds each. Hens of T1 (control) group were fed basal diet, whereas in treatment groups T2, T3 and T4, the basal diet was supplemented with chili leaf powder at the rate of 0.5, 1.5 and 2.5 percent, respectively. Results showed that overall cumulative performance of the laying hens of different treatment groups during the 12 weeks (28-40 weeks) of experimental feeding period in terms of weight gain, egg production and FCR was not significantly affected due to feeding of diet supplemented with chili (Capsicum annuum) leaf powder. However, overall average feed intake significantly (P<0.05) reduced in hens supplemented with 2.5% chili leaf powder. Dry matter and organic matter utilization was significantly (P<0.05) increased in T4 group, while no significant difference was found in dry matter and organic matter utilization among T1, T2 and T3 groups. Crude protein utilization was significantly improved in T3 group as compared to T1 group (control), whereas utilization of crude protein in group T2 and T3 was similar when compared with control group. However, ether extract utilization was similar in all the groups. The egg quality parameters in terms of egg weight, shape index, shell weight, shell weight percentage, shell thickness, albumen height, albumen weight and haugh unit also did not differed significantly among different dietary treatments. However, the egg yolk pigmentation was significantly (P<0.05) improved in T4 group when compared with T1, T2 and T3 groups while the colour of egg yolk was similar among T1, T2 and T3 groups. Other yolk quality parameters like yolk weight, yolk weight percentage, yolk cholesterol, yolk triglycerides and yolk index were statistically similar in all the groups. The haematological parameters were also not affected by supplementation of chili leaf powder in basal diet. Serum biochemical constituents (serum glucose, cholesterol, triglycerides, total protein, albumin, globulin, calcium, phosphorus, SGPT and SGOT) of laying hens did not differ significantly among dietary treatments. Total feed cost and average feed intake in the group supplemented with 2.5 % chili leaf powder (T4 group) was lower than the control group; however feed cost and average feed intake in T2 and T3 groups was not affected by addition of chili leaf powder. Further, feed cost per dozen egg production was statistically similar in all the treatments. From the present study, it is concluded that chili (Capsicum annuum) leaf powder can be supplemented @ 2.5 % in diet to improve egg yolk pigmentation and nutrient utilization as well as to reduce feed cost in Rhode Island Red laying hens.
