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| Itza-Ortiz,MF; Peraza-Mercado,G; Castillo-Castillo,Y; Rodriguez-Alarcon,CA; Vital-Garcia,C; Jaramillo-Lopez,E; Carrera-Chavez,JM. |
| ABSTRACT Poultry farmers in the southeastern of Mexico consider that the productivity of the hens that comes from rearing on floor has a higher productive performance than reared hens in cages, mainly due to higher percentage of egg laying and lower mortality. The aim of this study was to evaluate the productive performance of the laying hen in relation to the type of rearing. A total of 79680 pullets Bovans White of 17 weeks of age were housed in cages with five pullets cage-1 (405 cm2pullet-1). They were divided in two treatments according to their type of rearing (floor vs cage) with four replicates. The study period was from week 20 to week 40 of age. The variables evaluated were daily (%) and cumulative mortality (%), egg production (%), egg weight... |
| Tipo: Info:eu-repo/semantics/report |
Palavras-chave: Feed intake; Productive performance; Mortality; Egg production; Rearing method. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000300543 |
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| Arzola-Alavarez,C; Castillo-Castillo,Y; Anderson,RC; Hume,ME; Ruiz-Barrera,O; Min,BR; Arzola-Rubio,A; Beier,RC; Salinas-Chavira,J. |
| ABSTRACT To study the antimicrobial and uric acid-preserving activity of pine bark tannin on poultry litter composting, antibiotic-free wood chip-based poultry litter was distributed (11 g) to 50-mL conical centrifuge tubes and immediately amended with 1.3 mL0.4 M sodium phosphate buffer (control) or with 1.3 mL condensed tannins from pine bark (Pinus palustris; 9 % tannin wt/vol in water). All tubes (n = 3 tubes/treatment) were inoculated with a novobiocin and naladixic acid-resistant Salmo-nella typhimurium (STNN) to achieve 3.0 log10 CFU/g and incubated at 37oC for 3 days to simulate an initial compost period. Wildtype E. coli and the challenge STNN strain as well as concentrations of ammonia, uric acid and urea were measured on days 0 and 3. Pine bark... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Poultry litter; Condensed tannins; Uric acid; Bacterial pathogens. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2020000100305 |
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