Prairie Swine Centre » Pork Insight Articles

The effects of farrowing nest size and width on sow and piglet behaviour and piglet survival.

Posted in: Welfare by admin on January 1, 1998 | No Comments

Adoption of immobility by shackled broiler chickens: effects of light intensity and diverse hooding devices.

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Livestock Odors: Implications for Human Health and Well-Being

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Ammonia Emission from a Large Mechanically-Ventilated Swine Building During Warm Weather

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Ammonia emissions were measured in a 100 head grower-finisher operation in the mid-west United States between June – September 1997. This study examined the impact number of hogs (and their respective weight), ventilation rate and temperature (indoor and outdoor) has on the ammonia concentration levels in a mechanically ventilated operation. As well determining appropraite measurement locations in order to gather reliable ammonia emissions data. Throughout the study the average ammonia emission concentration was 5.4 +/- 0.41 ppm, however significant differences were found between pit head space, pit fans and wall fans, as well ammonia concentration in the building was found to be inverselt porportional to the ventilation rate. The avearge daily ammonia emission was 11.2 kg/day, or 122 g/d per 500 kg of body weight, and was found to be directly porportional to the ventilation rate, pig number and indoor temperature.

Feeding Strategies for Manipulating Manure Content

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A review of the different dietary manipulation and additives supplementation that can be done is presented. Nutritional management by the reduction of mineral excretion by improvement of the nutrients use and herd management by the selection of farm animals that present a better feed conversion and mineral retention are important aspects in nutrients efficiency. Diet formulation that is done to be the closer to the animal’s requirements and the use of synthetic amino acids, enzymes and approved growth promoter are other steps that can be take to better utilize the nutrients by the animal.