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| Pereira,Dayana Cristina de Oliveira; Miranda,Késia Oliveira da Silva; Demattê Filho,Luiz Carlos; Pereira,Gustavo do Valle; Piedade,Sonia Maria De Stefano; Berno,Patricia Rodrigues. |
| ABSTRACT The objective of this study was to evaluate the effect of the presence of roosters on welfare and egg production of laying hens reared in an alternative system. Two breeding systems were established: barn 1 - laying hens reared without roosters (4500 birds); and barn 2 - laying hens reared with roosters (4500 layers and 250 roosters). In the poultry facilities, microclimate, egg production, mortality rate, and bird behavior were evaluated. Microclimate analysis showed that the birds were subjected to periods of constant heat stress, except for the morning hours. However, even under these conditions, egg production results and mortality rate were consistent with the indices recommended in the Isa Brown management guide in the barn with roosters;... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Behavior; Enthalpy; Husbandry environment; Laying hens. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000300175 |
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| Leal,Rafael Marques Pereira; Firme,Lilian Pittol; Montes,Célia Regina; Melfi,Adolpho José; Piedade,Sonia Maria De Stefano. |
| Wastewater irrigation may benefit agricultural crops with water and essential nutrients (mainly nitrogen), also affecting soil chemistry. The effects of effluent irrigation on yield, stalk nutrient uptake and on soil chemistry over 16 months were studied in a sugarcane (Saccharum spp.) crop growing on an Oxisol in Lins, State of São Paulo, Brazil. Irrigated plots received 50% of the recommended mineral-N fertilization and 100, 125, 150 or 200% of the crop water demand, while control plots received neither additional N nor water. The high sodium content of effluent resulted in Na inputs as high as 6.2 t ha-1, along with 1497 kg N ha-1 and 628 kg K ha-1. All the effluent plots except the T125 treatment had higher yields (up to 247 t ha-1) than the control... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Saccharum spp.; Water reuse; Land disposal; Nutrient cycling. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000200014 |
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