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              Open Access  
 
              
              
              
              Research 
              
              
(Published 
				online: 06-05-2016)  
              3. 
				
				
				Growth performance, nutrient utilization, and feed efficiency in 
				broilers fed 
				
				Tithonia diversifolia 
				
				leaf meal as substitute of conventional 
				feed ingredients in Mizoram - 
				
				Rajat Buragohain 
              
              Veterinary World, 9(5): 444-449   
              
   
                
                
doi: 
              
				
				10.14202/vetworld.2016.444-449 
                
				  
				
				Rajat Buragohain: 
				
				Department of Animal Nutrition, College of Veterinary Sciences 
				and Animal Husbandry, Central Agricultural University, Selesih, 
				Aizawl, Mizoram, India; drrajat57@gmail.com   
				
				Received: 14-10-2015, Accepted: 28-03-2016, Published online: 
				06-05-2016 
				  
				
              	
              	Corresponding author:Rajat Buragohain, e-mail: drrajat57@gmail.com 
 
              Citation: 
				
				Buragohain R (2016) Growth performance, nutrient utilization, 
				and feed efficiency in broilers fed 
				
				Tithonia diversifolia 
				
				leaf meal as substitute of conventional feed ingredients in 
				Mizoram, 
				
				Veterinary World, 9(5): 
				444-449. 
 
              
				Abstract 
 
				
				
				Aim: 
				
				The study was for assessment of growth performance, nutrient 
				utilization, and feed efficiency in broilers fed rations with 
				varying levels of 
				
				Tithonia diversifolia 
				
				leaf meal (TDLM) as a substitute of conventional feed 
				ingredients in Mizoram. 
				
				
				Materials and Methods: 
				
				A total of 180, 1-day-old broiler chicks were randomly divided 
				into six homogeneous groups and fed rations incorporated with 
				TDLM (TDLM at 0% [TDLM-0], 2% [TDLM-2], 4% [TDLM-4], 6% 
				[TDLM-6], 8% [TDLM-8], and 10% [TDLM-10] level as substitute of 
				conventional feed ingredients) for 6 weeks. The chicks were 
				reared in battery brooders for the first 2 weeks, and 
				thereafter, in well-ventilated deep litter house following 
				standard management protocols. Feed and drinking water were 
				provided 
				
				ad libitum 
				
				to all the groups throughout the experiment. The daily feed 
				intake and weekly body weight gain were recorded, and a 
				metabolic trial for 3 days was conducted at the end of the 6th 
				week. 
				
				
				Results: 
				
				Feed consumption decreased for inclusion of TDLM but without any 
				significant differences, except during the 3rd week 
				where it reduced significantly (p<0.05) at and above 6% TDLM in 
				the ration. The average body weight gain decreased significantly 
				(p<0.05) above 6% TDLM inclusion. The average body weights at 7th, 
				14th, and 21st day of age reduced 
				significantly (p<0.05) from 4% to 10% TDLM inclusion level but 
				was statistically non-significant up to 4% TDLM at 28th, 
				35th, and 42nd day of age. Body weight at 
				42nd day of age was 1624.72±30.52, 1616.66±17.84, 
				1592.60±19.24, 1404.61±17.76, 1188.29±17.67, and 1054.33±18.81 
				gin TDLM-0, TDLM-2, TDLM-4, TDLM-6, TDLM-8, and TDLM-10, 
				respectively. The digestibility of nutrients decreased with 
				increased inclusion level of TDLM. The digestibility coefficient 
				of dry matter, crude protein, ether extract, and nitrogen free 
				extract were significantly higher in TDLM-0, but crude fiber 
				digestibility was comparable without any significant difference 
				among the groups. Feed conversion ratio (FCR) at 42nd 
				day of age was 2.17±0.15, 2.17±0.15, 2.13±0.13, 2.46±0.16, 
				2.66±0.11, and 3.96±0.10 for TDLM-0, TDLM-2, TDLM-4, TDLM-6, 
				TDLM-8, and TDLM-10, respectively, was statistically 
				non-significant up to 4% TDLM inclusion level. 
				
				
				Conclusion: 
				
				Considering the insignificant effects on growth rate, FCR, and 
				body weight at 42nd day of age, it was concluded that 
				TDLM could be incorporated up to 4% level as substitute of the 
				conventional feed ingredients for broilers reared under deep 
				litter system of management in Mizoram. 
				
				Keywords: 
				
				broiler, growth, Mizoram, nutrient digestibility, 
				
				Tithonia diversifolia 
				
				leaf meal. 
 
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