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Impact of feed restriction on the performance of highly prolific lactating sows and its effect on the subsequent lactation

Published online by Cambridge University Press:  21 September 2015

S. De Bettio ,
A. Maiorka ,
L. N. E. Barrilli ,
R. Bergsma  and
B. A. N. Silva
S. De Bettio
Affiliation:
Animal Science Department, Universidade Federal do Paraná (UFPR), 80035-050, Curitiba, Paraná, Brazil
A. Maiorka
Affiliation:
Animal Science Department, Universidade Federal do Paraná (UFPR), 80035-050, Curitiba, Paraná, Brazil
L. N. E. Barrilli
Affiliation:
Animal Science Department, Universidade Federal do Paraná (UFPR), 80035-050, Curitiba, Paraná, Brazil
R. Bergsma
Affiliation:
TOPIGS Research Center IPG, Schoenaker 6, 6640 AA Beuningen, The Netherlands
B. A. N. Silva*
Affiliation:
Institute of Agricultural Sciences/ICA, Universidade Federal de Minas Gerais (UFMG), 39404-547 Montes Claros, Minas Gerais, Brazil
*
†E-mail: BrunoSilva@ufmg.br
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Abstract

A total of 50 mixed parity sows of a high-prolificacy genetic line were used to evaluate the impact of feed restriction during lactation on their production and reproductive performance and their performance in the subsequent lactation. From day 7 of lactation, sows were distributed according to a completely randomized experimental design into two treatments. In treatment 1, sows were fed 8.0 kg feed/day (control) and in treatment 2, sows were fed 4.0 kg/day. The same suckling pressure was maintained until weaning on day 28 of lactation. Average minimum and maximum temperatures measured during the experimental period were 32.1°C and 16.5°C, respectively. Control sows presented significantly higher feed intake (P<0.001) compared with the restricted sows (6.43 v. 4.14 kg/day, respectively). Treatments influenced BW and backfat thickness losses (P<0.001). Control sows lost less BW than the restricted-fed sows (7.8 v. 28.2 kg). Restricted-fed sows lost more backfat thickness than those in the control group (3.97 v. 2.07 mm; P<0.01). Restricted-fed sows tended (P<0.10) to be lighter at weaning compared with the control sows (211 v. 227 kg). The composition of BW loss was influenced by the treatments (P<0.001), as the restricted-fed sows lost more body protein, lipids and energy compared with the control sows (3.90 v. 0.98 kg, 11.78 v. 4.83 kg and 584 v. 224 MJ, respectively). Litter weight gain was greater (P<0.05) in control sows than in restricted-fed sows (2.70 v. 2.43 kg/day). Daily milk production was 19% higher (P<0.01) in the control sows compared with the restricted-fed sows (8.33 v. 6.99 kg/day). However, restricted-fed sows presented a higher (P<0.05) lactation efficiency than the sows of the control group (82.30% v. 72.93%). No differences were detected (P>0.10) in weaning-to-estrus interval and averaged 4.3 days. No effect of the treatment (P>0.10) was observed on any of the studied performance traits in the subsequent lactation, except for litter size at birth that tended (15.2 v. 14.1; P<0.10) to be lower for the restricted sows. In conclusion, the present study demonstrated that feed restriction during lactation leads to intense catabolism of the body tissues of sows, negatively affecting their milk production, and the litter weight gain and possibly number of piglets born in the next litter. On the other hand, restricted-fed sows are more efficient, producing more milk per amount of feed intake.

Keywords

efficiencyfeed restrictionlactationmilk productionsows
Type
Research Article
Information
animal , Volume 10 , Issue 3 , March 2016 , pp. 396 - 402
Copyright
© The Animal Consortium 2015 

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