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Ivarsson, Emma (2007) Tillskottsutfodring av smågrisar under digivningsperioden. Other thesis, SLU.

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Weaning is one of the most critical events in the piglet production with problems such as growth check and post-weaning diarrhea as a result. The lighter the piglets are when the growth check occurs, the harder they have to get back to normal growth rate. Creep feeding of piglets is used to reduce the problems by increasing the weaning weight and adapting the digestive tract to a starter diet. Hodge (1974) showed that the sow's milk can not provide enough nutrients for maximal growth rate. Artificially reared piglets showed a growth rate twice that of the sow-reared piglets. The potential to increase the growth rate during the suckling period is high and so is also the interest for creep feeding. The aim of this thesis was to study the effect on production results when piglets are fed the milk based creep feed Parvel, which is fed dry during the suckling period. The report also includes a review of known effects of creep feeding. The review showed that one of the main issues with creep feed is a low feed intake. It is also important to remember that the digestive tract of the piglet is adapted to the components of the sow's milk and the ability to digest starch and vegetable protein is low. Therefore, a creep feed should be based on milk-products. The development of the digestive tract is dependent both on age and nutrient supply. It is specially the production of pancreatic enzymes that are affected by nutrient supply and increases if creep feed is offered. The ability to digest starch and vegetable protein is therefore also increasing. The weaning weight increases if creep feed is offered, but the effect of creep feed is very low two weeks after weaning. Creep feeding does not either affect the incidence of diarrhea caused by coli bacteria. My own trial was performed at two farms, the creep feed Parvel was fed mixed with peat to 15 litters in each farm. 15 litters in each farm were used as control and fed peat only. The litters were weighed when the piglets were 4 and 32 days in both farms and also when the piglets where 55 days in farm A. The hypothesis of the trial was that the piglets fed Parvel should show a higher growth rate, lower mortality and less variation in weight within the litter compared to the litters fed peat only. The results did not support the hypothesis. There were no significant differences due to treatment. But the results showed a significant effect due to farm and also a significant interaction between farm and treatment on piglet mortality. The variation showed significant differences due to age for the first weighing and due to the number of piglets in the litter at the second weighing. The conclusion of the review and the trial is that Parvel is a good supplement to litters with many small piglets and also to litters where the sow's milk production is low. These litters often contribute to a major part of the piglet mortality and also show a low growth rate. Extra effort on these litters may therefore be well invested money.

Item Type: Thesis (Other)
Keywords: Smågrisar, tillskottsutfodring, smågrisdödlighet, mjölkprotein
Subject (faculty): Faculty of Veterinary Medicine and Animal Science > Centre for Sustainable Agriculture
Divisions: SLU > Faculty of Veterinary Medicine and Animal Science
Depositing User: Emma Ivarsson
Date Deposited: 10 May 2007
Last Modified: 18 Aug 2015 09:50
URI: http://ex-epsilon.slu.se/id/eprint/1638

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