Data/hora: 05/06/2024 01:25:20

Provedor de dados: 	89	
País: 	Brazil	
Título: 	Tarragon (Artemisia Dracunculus L.) Could Alleviate Negative Effects of Stocking Density in Laying Hens	
Autores: 	Kaya,H; Karaalp,M; Kaynar,Ö; Tekçe,E; Aksakal,A; Bayram,B.	
Data: 	2021-01-01	
Ano: 	2021	
Palavras-chave: 	Antioxidant; Bacteria; IgG; Stocking density; Tarragon.	
Resumo: 	ABSTRACT The study was conducted to determine the effects of stocking density (SD, 5 or 7 layers/cage) and tarragon (Artemisia dracunculus L.) diet supplementation at four levels (0, 1.2, 6 and 12 g/kg feed) on performance, certain egg characteristics, serum, liver, egg yolk and small intestine bacteria parameters in laying hens. The experiment was carried out over a period of 8 weeks, with 192 Lohman Brown commercial hybrids at 50-w-age. The results showed that an increased SD reduced feed intake (FI; p&lt;0.01) and egg production (p&lt;0.05), but had no effect on the weight gain, feed conversion ratio, damaged egg ratio, egg weight and egg quality (p&gt;0.05) parameters. The supplementation of tarragon to the diet reduced the FI and damaged egg ratio (p&lt;0.01), and improved egg production and FCR (p&lt;0.01). While an increased SD reduced serum total antioxidants (p&lt;0.05), it elevated corticosterone (CORT) and total oxidant serum (TOS) (p&lt;0.05). Tarragon was found to enhance total immunoglobulin (p&lt;0.05), but to decreased the CORT and TOS of the serum (p&lt;0.05). An increased SD raised the malondialdehyde (MDA) in the serum (p&lt;0.001), liver (p&lt;0.05) and yolk (p&lt;0.001). Tarragon supplementation reduced MDA of the serum (p&lt;0.05), liver (p&lt;0.001) and yolk (p&lt;0.001). E. coli and total Mesophilic Aerobic Bacteria counts in the small intestine were raised (p&lt;0.001) with increased SD. Tarragon decreased (p&lt;0.05) mesophilic aerobic bacteria. It was thus found that, tarragon supplementation can be considered generally effective in improving performance parameters, alleviating stress-induced negativities, reducing lipid peroxidation, regulating the immune system and controlling some intestinal microorganisms.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2021000100301	
Editor: 	Fundação APINCO de Ciência e Tecnologia Avícolas	
Relação: 	10.1590/1806-9061-2020-1309	
Formato: 	text/html	
Fonte: 	Brazilian Journal of Poultry Science  v.23 n.1 2021	
Fonte: 	info:eu-repo/semantics/openAccess