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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:
Community structure and functional diversity of indigenous fluorescent Pseudomonas of long-term swine compost applied maize rhizosphere
Posted in: Production by admin on January 1, 2007 | No Comments
Gestating sows prefer concentrate diets to high-fibre diet in two-choice tests
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The feed preferences of gestating sows were investigated in sixteen Large White X Landrace nulliparous sows, when
offered feeds of different fibre and protein contents in two-choice preference tests carried out between their 8th
to 13th weeks of gestation.
Intake, digestibility and N retention by growing pigs fed ensiled or dried Taro (Colocasia esculenta) leaves as the protein supplement in basal diets of rice bran/broken rice or rice bran/cassava root meal
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Colocasia esculenta var. antiquorum known as Taro or Cocoyam is widely distributed in the humid tropics including India and
South East Asia. Taro is recognized as a large coarse herb with crowns of large oblong-oval leaves and an abundance of large
spherical underground tubers. Taro can be grown under flooded or upland conditions and it is one of the important crops for poor
resource farmers in the tropics. In Cambodia, Taro is known in Khmer as ‘Trao’. It is planted for home consumption of both tubers
and petioles. However, when there is production in excess of household needs, Taro leaves and petioles are cooked and fed to pigs.
Taro leaves are rich in protein, minerals and vitamins. The aim of the present experiment was to study the effect of ensiling or drying Taro leaves on intake, digestibility and N retention
of growing pigs given a basal diet of rice bran mixed with broken rice or rice bran mixed with cassava root meal. It was found that the apparently higher nutritive value of sun-dried compared with ensiled Taro leaves may have been caused by inadequacies in the ensiling process, resulting in excessive breakdown of the protein and poor palatability.
Also, the relatively high values of N retention (equivalent to about 250 g/day of live weight gain) and of retained N as a proportion of digested N in the diet with sun-dried Taro leaves, are indicative of a high biological value of the Taro leaf protein, especially it represented over 80% of the dietary crude protein these diets.
A review of gaseous ammonia emissions from slurry pits in pig production systems
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Twenty-six experimental studies of ammonia emissions from pig buildings that utilise
some form of pit/slurry system have been analysed and compared. Using standard values
for pig weight and total Kjeldahl nitrogen (TKN) content in the waste when these quantities
were unspecified, experimental ammonia emissions were compared on a per cent loss
(of excreted TKN) basis. Correction factors were determined for measurements made
during specific parts of the year, with corresponding differences in temperature, or time of
day, and adjustments were made to put emission data on an annual average basis, when
applicable. When corrected in this way, measurements made in the United States and in
Europe were 22% and 21%, respectively. The standard deviation and standard error of the
mean were 9% and 1.8%, respectively. The 95% confidence interval of the mean was
17.6–24.9%. The proposed emission factor data are reasonably consistent and emission
factors higher or lower must be critically compared to the existing experimental base.
Growth of bedding plants in commercial potting substrate amended with vermicompost
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Reconsidering Integrated Crop–Livestock Systems in North America
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The effects of manure application on soil aggregation
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