17 research outputs found
An Information Company in Mexico: Extending the Resource-Based View of the Firm to a Developing Country Context
Phosphorus Intake and Excretion on South Carolina Dairy Farms11Technical contribution number 4478 of the South Carolina Agricultural Experiment Station, Clemson University.
Murine typhus returns to New South Wales: a case of isolated meningoencephalitis with raised intracranial pressure
Transdisciplinary translational behavioral (TDTB) research: opportunities, barriers, and innovations
Late onset haemorrhagic disease in premature infants who received intravenous vitamin K 1
The effects of husbandry system on the grass intake and egg nutritive characteristics of laying hens
Abstract
BACKGROUND
The aim of this study was to determine the effect of husbandry system and season on the grass intake and egg quality in laying hens considering that characteristics of organic eggs obtained in a system with no grass in the external area are similar conventional ones.
RESULTS
Three hundred and sixty Ancona hens were randomly assigned to three groups: a control group (C), with the hens kept in cages under standard housing conditions; the organic group (O), with the hens kept under an organic production system (4 m2 per hen) and the organic-plus group (OP), with the hens maintained under organic conditions but with a larger grass paddock availability (10 m2 per hen). The estimated intake of forage, carotenoids and flavonoids of the OP hens was very high as the amounts deposited in eggs, mainly in the spring season. The fatty acid composition of the yolk was significantly affected by pasture. The OP eggs showed lower concentrations of polyunsaturated fatty acids (PUFA) n-6 and a higher percentage of PUFA n-3.
CONCLUSIONS
The results showed that the grass intake was largely affected by the husbandry system and highlighted the seasonal effect of grass availability on the nutritional quality of eggs produced in organic systems