Feeding Strategies for Manipulating Manure Content

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

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.

Simulating NO3-N to Tile Drainage from Manure Plots

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Methane Recovery from Animal Manures The Current Opportunities Casebook

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NITRIFICATION LIMITATION IN ANIMAL SLURRIES AT HIGH TEMPERATURES

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Manure Management for Swine Facilities – French Version

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Water and Swine Facilities – French Version

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Evaluation of possible methods to reduce pain associated with electroejaculation in bulls.

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Effects of lairage temperature and holding time on pig behaviour and on carcass and meat quality.

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The problem of broken bones during the handling of laying hens – a review.

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Hydrogen Sulfide Emissions from a Mechanically Ventilated Swine Building During Warm Weather

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Hydrogen sulfide gas is on of the most dangerous gases produced from manure decomposition, being produced through anaerobic fermentation of manure. Hydrogen sulfide concentration of 50 ppb can cause dizziness, nauisea and irriatation of the respiratory tract, and concentrations in excess of 1,000 ppb can cause respiratory paralysis or death.

Hydrogen sulfide concentration were measured in three locations in a naturally ventilated grower-finisher barn: pit-head space, pit fans and wall fans. Average daily mean concentration ranged from 158 – 197 ppb, averaging 158 +/-21 for all three locations, with a maximum and minimum of 38 and 536 ppb respectively. There were also wide daily concentration fluctuations and moderate concentration diffeences wre apparent between the three locations. Demonstrating the importance of selecting the proper location for measurement.

The average daily hydrogen sulfide emission was 587 +/-57 g/d or 7.0 +/- g/d per 500 kg of body weight from the building. The daily hydrogen sulfide emsissions were between 2-6 g/d per 500 kg fo body weight over half of the days that were being tested. The daily indoor concentration levels were found to be inversely porporational to the ventilation rate and inside temperature. The daily emission rate was directly porportional to the ventilation rate, temperature and pig weight.