In order to evaluate the effect of group size on post-weaned piglet performance, two 42 d-trials were carried out in two farms situated in Montecastrilli (TR) and in Perugia. In the first trial 108 piglets, coming from 12 crossbred sows artificial inseminated with the semen of the same boar, were used. Piglets were weaned at 28,0 d ( 2,1) and divided in 3-two flat-deck cages groups; all the cages were placed in the same room. In each cage of the same group 9 (group A), 18 (group B) and 27 (group C) piglets were housed. The groups were made homogeneous for genetic type, sex (barrows and gilts), body weight, floor-area allowance (0,25 m2/piglet), nipple drinker num-ber/piglet (1/9) and feeder-trough space. The animal were fed ad libitum with pelleted feed. The piglets were weighed at the start and at the end of the trial and every two weeks. At the same time the food consumption of every group was pointed out. The second trial were performed using 100% Large White piglets. The animals, weaned at 26,6 d ( 1,9), were subjected to the same experimental design employed in the first trial, except-ing the diet, that had a different composition. The growth performance of the piglets during the tests in Montecastrilli and in Perugia showed no significative differences between the groups in comparison. In fact at the end of the research the daily gain was between 447 g (group B) and 439 g (group C) in the first test, and be-tween 405 g (group A1) and 396 g (group B1), in the second test. Also the feed efficiency ratio showed lightly different values between the groups, because of the few data: 1,63 (group B), 1,54 (group C) in the first test and 1,58 (group B1) and 1,46 (group A1) in the second test. About the behaviour and the health conditions of the animals no big differences between the groups were noticed.

Influenza della numerosità del gruppo sulle performance di suinetti in postsvezzamento.

GRANDI, Augusto;DE VINCENZI, Sergio
2005

Abstract

In order to evaluate the effect of group size on post-weaned piglet performance, two 42 d-trials were carried out in two farms situated in Montecastrilli (TR) and in Perugia. In the first trial 108 piglets, coming from 12 crossbred sows artificial inseminated with the semen of the same boar, were used. Piglets were weaned at 28,0 d ( 2,1) and divided in 3-two flat-deck cages groups; all the cages were placed in the same room. In each cage of the same group 9 (group A), 18 (group B) and 27 (group C) piglets were housed. The groups were made homogeneous for genetic type, sex (barrows and gilts), body weight, floor-area allowance (0,25 m2/piglet), nipple drinker num-ber/piglet (1/9) and feeder-trough space. The animal were fed ad libitum with pelleted feed. The piglets were weighed at the start and at the end of the trial and every two weeks. At the same time the food consumption of every group was pointed out. The second trial were performed using 100% Large White piglets. The animals, weaned at 26,6 d ( 1,9), were subjected to the same experimental design employed in the first trial, except-ing the diet, that had a different composition. The growth performance of the piglets during the tests in Montecastrilli and in Perugia showed no significative differences between the groups in comparison. In fact at the end of the research the daily gain was between 447 g (group B) and 439 g (group C) in the first test, and be-tween 405 g (group A1) and 396 g (group B1), in the second test. Also the feed efficiency ratio showed lightly different values between the groups, because of the few data: 1,63 (group B), 1,54 (group C) in the first test and 1,58 (group B1) and 1,46 (group A1) in the second test. About the behaviour and the health conditions of the animals no big differences between the groups were noticed.
2005
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11391/109700
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