Date Received: Jun 17, 2025
Date Accepted: Sep 04, 2025
Date Published: Sep 30, 2025
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Effects of Dietary Lupin (Lupinus angustifolius) Inclusion on the Growth Performance of Growing–Finishing Pigs
Keywords
Nutritional value, supplement, feed efficiency, economic efficiency
Abstract
This study investigated the potential of replacing soybean meal with lupin (Lupinus angustifolius) at varying inclusion levels in the diets of growing–finishing pigs from 12 to 22 weeks of age. A total of 120 crossbred pigs (Duroc × [Yorkshire × Landrace]) were randomly assigned to one of four dietary treatments: a control diet without lupin (LP0), and diets containing 5% (LP5), 9% (LP9), or 12% (LP12) lupin. Growth performance parameters were recorded over a 70-day feeding period. Pigs fed the LP12 diet exhibited a significantly lower body weight and average daily gain (P <0.05) than those fed the LP0, LP5, and LP9 diets. Feed intake did not differ significantly among the treatments (P >0.05), whereas the feed conversion ratio was significantly higher in the LP9 and LP12 groups than in LP0 and LP5 (P <0.05). Economic analysis indicated that the LP5 diet provided the greatest economic benefit, reducing feed cost per kilogram of gain without impairing performance. These findings suggest that the dietary inclusion of lupin up to 9% does not compromise growth performance, with 5% being the most economically advantageous level for fattening pigs.
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