Effects of substitution of a carbohydrate source by highly polyunsaturated or partially saturated oil on the fatty acid composition of backfat tissues, marbling fat and vitamin E content of meat in growing-fattening pigs

Ocampo, Amanda Eva; Dodds, Peter F.; Lean, I.J.

doi:10.1017/s1752756200004543

Proc. Br.Soc. Anim. Sci.

2001

DOI: 10.1017/s1752756200004543

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Effects of substitution of a carbohydrate source by highly polyunsaturated or partially saturated oil on the fatty acid composition of backfat tissues, marbling fat and vitamin E content of meat in growing-fattening pigs

Amanda Eva Ocampo

Peter F. Dodds²,

I.J. Lean

Abstract: The fatty acid and vitamin E concentration in the diets of growing pigs are known to affect backfat and meat quality. The aim of this study was to determine the effects of substitution of a carbohydrate dietary source (maize) by a series of oils on the fatty acid (FA) composition of backfat and marbling fat at slaughter. Vitamin E concentration in muscle (longissimus dorsi ) was also determined.

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The effects of dietary oil inclusion and oil source on apparent digestibility, faecal volatile fatty acid concentration and manure ammonia emission

Leek¹,

Beattie²,

O’Doherty³

2004

Anim. Sci.

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An investigation was conducted to test the hypothesis that dietary oil inclusion increases ammonia nitrogen (NH3-N) emission from the manure, due to a negative effect of either unsaturated or saturated oil on microbial activity in the intestine. Dietary oil was included at 45 g/kg, as either crude palm oil (PO), soya oil (SO) or a 50: 50 SO: PO blend (OB), to a basal barley-soya-wheat diet (control) at the expense of dextrose and maize starch. Diets were formulated to contain 13·2 MJ digestible energy per kg and 11·0 g/kg lysine. Four boars were assigned to each dietary treatment, and were transferred to metabolism crates (mean live weight, 74·0 (± 2·89) kg) following 14 days dietary acclimatization. Urine and faeces were collected separately over a 5-day digestibility/nitrogen (N) balance period and a 2-day manure collection period. Inclusion of dietary oil increased apparent digestibility of oil (P < 0·01) and decreased the apparent digestibility of dry matter (P < 0·01) and gross energy (P < 0·05). Dietary oil did not affect the apparent digestibility of nitrogen, acid-detergent fibre, neutral-detergent fibre or hemicellulose. Apparent digestibility of oil was lower when oil was included as PO compared with SO and OB (P < 0·001). The concentration of faecal volatile fatty acid (VFA) was similar in all treatments, although the acetic: propionic acid ratio was lower when oil was included as PO and OB compared with SO (P < 0·05). N balance, manure N concentration and NH3-N emission was not affected by oil inclusion or oil source. In conclusion, dietary oil inclusion reduced apparent dry matter and energy digestibilities, although no effect on fermentation was indicated by digestibility of fibre or faecal VFA content. Consequently, ammonia emission was not affected by dietary oil included at 45 g/kg.

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The effects of dietary oil inclusion and oil source on apparent digestibility, faecal volatile fatty acid concentration and manure ammonia emission

Leek¹,

Beattie²,

O’Doherty³

2004

Anim. Sci.

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show abstract

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Effects of substitution of a carbohydrate source by highly polyunsaturated or partially saturated oil on the fatty acid composition of backfat tissues, marbling fat and vitamin E content of meat in growing-fattening pigs

Cited by 1 publication

References 0 publications

The effects of dietary oil inclusion and oil source on apparent digestibility, faecal volatile fatty acid concentration and manure ammonia emission

The effects of dietary oil inclusion and oil source on apparent digestibility, faecal volatile fatty acid concentration and manure ammonia emission

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