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Industry Partners
Prairie Swine Centre is an affiliate of the University of Saskatchewan
Prairie Swine Centre is grateful for the assistance of the George Morris Centre in developing the economics portion of Pork Insight.
Financial support for the Enterprise Model Project and Pork Insight has been provided by:
Genetic parameters for carcass composition and pork quality estimated in a commercial production chain
Posted in: Production by admin on January 1, 2005 | No Comments
Consumer demands regarding food of animal origin
are of growing importance. As a consequence, traits referring to meat quality are of increasing relevance
for the pork industry. Therefore, the objective of this study is to estimate genetic parameters
for carcass and meat quality traits that are
of practical relevance in combination with information
from current or intended classification systems. It was found that selection for growth rate will have adverse consequences for meat quality based on
the high unfavorable correlations found between average
daily gain and most quality traits considered. Furthermore,
selection for growth rate is negatively correlated
with (sub)primal cut yield and will therefore not
automatically lead to increased cut weights. However,
selection towards increased carcass value by increasing
(sub)primal weights with improved quality will
clearly be feasible based on the correlations that were
found between most meat quality traits and (sub)primal
cuts.
The Effects of Air Injection on the Pipeline Transport of Cattle and Pig Slurries
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(published in revised form 4 April 2005; published online 13 June 2005) A large-scale pipeline apparatus was used to investigate the effects of air injection on the properties of turbulent liquid flows in horizontal pipelines of different internal diameters (381, 508, 762 and 102 mm). The liquids included clean water, pig slurries with total solid concentrations up to 44% and dairy cattle slurries with total solid concentrations up to 55%. The superficial flow velocities were between 05 and 6 m/s and air injection rates ranged from 1 to 6% (v/v) at the point of injection.
Experimental data were collected in the form of corresponding values of flow rate and pressure gradient. These showed that air injection generally increased pressure gradients compared with the liquids flowing alone. However, inspection of the data indicated a tendency towards pressure gradient reductions if air is injected into cattle slurries containing more than 55% total solids.
It was shown that a simple linear model could represent the changes in pressure gradient brought about by air injection, and that this could provide a satisfactory procedure for the design of slurry pipelines with air injection.
Composting Hog Manure – Why Isn’t Everyone Doing It?
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Composting is a manure management option to consider if there isn’t enough land for manure application. Increased cash flows can be obtained from compost sales only if patience and hard work are present. A composting option should be evaluated in the context of the entire manure management system on the farm. For liquid manure systems, composting may require separation of liquids and solids, which will add an extra step and additional cost. Composting can easily be done with manure from shallow or deep-bedded systems. Composting has also been done using liquid manure directly by blending with straw, corn stover or wood waste. This may be a viable option on farms that have manure with higher solids content. If composting is to be done, there are 2 options. If siting a new operation, it makes sense to consider a shallow litter system, followed by composting the manure. For existing operations, consider the overall manure management and reduce the water content of the manure. Composting of the manure following separation is a good option, but there is the idea of a system that does not require separation.
GAS AND ODOR EMISSIONS FROM SWINE BUILDING MATERIALS
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Survey of Water-Extractable Phosphorus in Livestock Manures
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Poly(vinyl alcohol)/Compost Composites for Biofiltration of Swine Waste Volatiles
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