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Precision feeding can significantly reduce lysine intake and nitrogen excretion without compromising the performance of growing pigs

Published online by Cambridge University Press:  13 January 2016

I. Andretta ,
C. Pomar ,
J. Rivest ,
J. Pomar  and
J. Radünz
I. Andretta
Affiliation:
Dairy and Swine Research and Development Centre, Agriculture and Agri-Food Canada, Sherbrooke, QC, Canada, J1M 0C8 Faculdade de Agronomia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS 91540-000, Brazil
C. Pomar*
Affiliation:
Dairy and Swine Research and Development Centre, Agriculture and Agri-Food Canada, Sherbrooke, QC, Canada, J1M 0C8
J. Rivest
Affiliation:
Centre de développement du porc du Québec, Sainte-Foy, QC, Canada, G1V 4M7
J. Pomar
Affiliation:
Department of Agricultural Engineering, Universitat de Lleida, Lleida 25198, Spain
J. Radünz
Affiliation:
Faculdade de Agronomia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS 91540-000, Brazil
*
†E-mail: [email protected]
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Abstract

This study was developed to assess the impact on performance, nutrient balance, serum parameters and feeding costs resulting from the switching of conventional to precision-feeding programs for growing–finishing pigs. A total of 70 pigs (30.4±2.2 kg BW) were used in a performance trial (84 days). The five treatments used in this experiment were a three-phase group-feeding program (control) obtained with fixed blending proportions of feeds A (high nutrient density) and B (low nutrient density); against four individual daily-phase feeding programs in which the blending proportions of feeds A and B were updated daily to meet 110%, 100%, 90% or 80% of the lysine requirements estimated using a mathematical model. Feed intake was recorded automatically by a computerized device in the feeders, and the pigs were weighed weekly during the project. Body composition traits were estimated by scanning with an ultrasound device and densitometer every 28 days. Nitrogen and phosphorus excretions were calculated by the difference between retention (obtained from densitometer measurements) and intake. Feeding costs were assessed using 2013 ingredient cost data. Feed intake, feed efficiency, back fat thickness, body fat mass and serum contents of total protein and phosphorus were similar among treatments. Feeding pigs in a daily-basis program providing 110%, 100% or 90% of the estimated individual lysine requirements also did not influence BW, body protein mass, weight gain and nitrogen retention in comparison with the animals in the group-feeding program. However, feeding pigs individually with diets tailored to match 100% of nutrient requirements made it possible to reduce (P<0.05) digestible lysine intake by 26%, estimated nitrogen excretion by 30% and feeding costs by US$7.60/pig (−10%) relative to group feeding. Precision feeding is an effective approach to make pig production more sustainable without compromising growth performance.

Keywords

nutritionnutrient requirementsprecision feedingproteinswine
Type
Research Article
Information
animal , Volume 10 , Issue 7 , July 2016 , pp. 1137 - 1147
Copyright
© The Animal Consortium and Her Majesty the Queen in Right of Canada, as represented by the Minister of Agriculture and Agri-Food Canada 2016 

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