Showing 10 of 34 results for "layer hens"

 

  • Impact of sorghum ergot in layer hens


    GRD 4AA2Though sorghum is an important component of layer hen diet, it is highly susceptible to contamination of sorghum ergot. This project aims to determine the safe practical limits for use of ergot contaminated sorghum grain in layer diets.

  • Energy requirements of imported layer strains


    DAQ 280AA2This study aims to determine the required energy intake of layer hen strain in terms of dietary energy concentration, feed intake, egg output, body weight and body fat content, in order to design diets that are nutrition and cost effective.

  • Evaluation of performance of tunnel ventilated layer housing

    Shed Ventilation FansCompetitive economic conditions mean that Australian egg producers seek ways to reduce the cost of egg production. Current housing design has proven unable to provide the economically optimum temperatures required by layers during winter and summer. This project analysed hen production and environmental performance in a tunnel ventilated laying house, demonstrating that by incorporating well designed tunnel ventilated housing, adequate insulation, good ventilation and air leakage prevention, it is possible to maintain temperature within the limits desired for efficient production.

  • Virulence of layer farm or egg associated Salmonella isolates

    2 About RDThis research was conducted to evaluate the virulence of Salmonella serovars commonly isolated from egg layer farms, through a study of the pathogenesis of egg/layer farm-related Salmonella serovars in a well-differentiated human intestinal cell culture model (in vitro) followed by a mouse model (in vivo). The study also investigated the ability ofSalmonella serovars to colonise the chicken oviduct organ cultures developed from Salmonella free laying hens. The Salmonella serovars were classified as high, medium and low invasive serovars. The genome of selected high, medium and low Salmonella serovars was also studied.

  • Canola meal and Cottonseed meal in broiler and layer diets

    DAQ 264JThis proposes that the Australian egg and poultry industry to incorporate canola and cottonseed meal in poultry diets. Canola and cottonseed meal is proven to be both economical and high in protein.

  • Effects of diet composition, gut microbial status and feed forms on cannibalism in layers

    UNE 72AAThe project aimed to identify both nutritional and husbandry factors that may contribute to increase cannibalism, and to develop strategies to minimise it.

  • Reducing the use of animal by-product meals in layer diets

    UQ 103AEconomic constraints and public concerns have compelled the poultry industry to increasingly use a range of cheaper, alternative plant-derived feedstuffs in feed formulations and eliminate the use of animal by-product meals. However, use of such ingredients also increases the dietary levels of phytic acid which can have wide ranging ramifications on performance of egg production, quality and nutrient digestibility. This publication details several studies which examined the effectiveness of supplemental phytase in improving the availability of phosphorus, amino acids and energy from plant feed ingredients for laying hens.

  • Pullet and layer flock uniformity: an epidemiological industry-based approach to improve feed efficiency

    FLHSThis research project aimed to investigate the variability among farms and flocks, for flock growth rates and uniformity, and to establish benchmarks of industry performance. Some laboratory modelling was undertaken on important issues to clarify causal relationships that can then be compared to data obtained from the cross sectional and experimental farm studies. The project showed that high peak production and good persistency of production can be achieved in flocks with an average body weight of 1.8-1.85 kg at 30-40 weeks of age.

  • Evaluation of Energy Usage and Ventilation Performance of Tunnel Ventilated Layer Sheds

    7701 Site Visit DDFE 18thJan12 6Due to increasing pressures on operating margins within the Australian egg industry, this study investigated the energy usage and ventilation systems in cage egg sheds. Optimising electricity usage is an important factor in improving the bottom line of egg production systems. This study found that some methods were more effective than others - the key is to concentrate on areas of the system that will not have an adverse effect on bird performance.

  • Salmonella control in layer chickens


    1US091The objectives of this project were to determine the capability to restrict Salmonella colonisation of and Salmonella shedding from layer chickens after differing vaccination regimes using live and inactivated Salmonella vaccines. These results were analysed to identify cost effective vaccination regime(s) to limit and achieve a reduction of Salmonella intestinal colonisation in commercial layer chickens in Australia.

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