EFFECT OF REPLACEMENT OF SOYBEAN MEAL BY SILKWORM MEAL ON GROWTH PERFORMANCE, APPARENT METABOLIZABLE ENERGY AND NUTRIENT DIGESTIBILITY IN BROILERS AT DAY 28 POST HATCH

Authors: R. Ullah, S. Khan, N. A. Khan, M. Tahir, N. Ahmad
Journal: Journal of Animal and Plant Sciences (JAPS)
ISSN: 1018-7081 (Print), 2309-8694 (Online)
Volume: 28  Issue: 5  Pages: 1239-1246
Year: 2018
DOI: NA
URL: https://doi.org/NA
Publisher: Pakistan Agricultural Scientists Forum

Abstract:
This study evaluated the effect of replacing soybean meal with silkworm meal on production performance, apparent metabolizable energy (AME) and apparent nutrients digestibility in broiler during starter phase. Fiveiso-nitrogenous and iso-caloric diets were formulated by stepwise i.e. 0% (SM0) , 25% (SM25), 50% (SM50), 75% (SM75) and 100% ( SM100) replacement of soybean meal with silkworm meal in broiler ration. Two hundred and fifty broiler day-old chicks were divided into twenty-five replicate groups ( n=10), with five replicates per diet using a completely randomized design. The silkworm meal analysis showed higher levels of crude protein ( 57.6 ± 1.50%) and crude fat (23.3 ± 0.21%). The silkworm meal has higher contents (g/100g of total amino acids) of lysine (7.52 ± 0.376) and methionine ( 3.88 ± 0.376), but was slightly deficient in tryptophan ( 1.70 ± 0.413). Mean intake of feed, gain in body weight and dressing percentage were higher (P < 0.05) in group SM75 in comparison with other groups. Moreover, better (P < 0.05) FCR was observed for SM0 ( 1.58± 0.031) and SM75 ( 1.59 ± 0.071) groups than SM50 (1.62 ± 0.030) group. The AME was higher (P < 0.05) in group SM75 and SM100 in comparison with other groups. The digestibility of dry matter, crude protein, crude fat, ash and N free extract did not differ (P > 0.05) . The organoleptic quality parameters were not altered ( P > 0.05) due to replacement of soybean meal by silkworm meal. The findings of the present study revealed that silkworm meal may effectively be used by replacing 75% soybean meal as low-cost protein ingredient in broiler ration. 2017). Recent studies have demonstrated that commercial

Keywords: Protein source; Insect protein; Amino acid profile, Feed conversion ratio.