Comparative digestibility experiments with growing pigs and adult sows

Fernández, J. A.; Jørgensen, Henry; Just, A.

doi:10.1017/s0003356100018419

Cited by 77 publications

(38 citation statements)

References 11 publications

(8 reference statements)

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“…Consistent to the present study, Le Goff & Noblet (2001) also observed an improved digestibility of organic matter, energy and crude protein for adult sows compared to growing pigs. The data from the present experiment showed in most instances a positive effect of increasing BW on apparent digestibility, comparable with the results of Fernández et al (1986) and Le Goff & Noblet (2001), where adult sows showed a superior digestibility of nutrients compared to growing pigs. In contrast, Kass et al (1980) found a negative effect of increasing BW on digestive capacity.…”

Section: Discussionsupporting

confidence: 88%

Effect of varying supply of amino acids on nitrogen retention and growth performance of boars of different sire lines

Otten

Berk

Hagemann³

et al. 2013

Arch. Anim. Breed.

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Three diets with varying amino acid levels were fed in two nitrogen balance studies and two fattening experiments in order to determine the nitrogen retention and growth performance of boars of different sire lines. A total of 12 boars, 6 crossbreed boars sired by Piétrain boars (Study 1) and 6 crossbreed boars sired by Duroc boars (Study 2) were used in the nitrogen balance studies. Three diets with increasing content of amino acids were used; it was intended to use the same diets in nitrogen balance studies and the fattening experiments in order to compare the N retention and performance of boars during the growth period. The diets used in all experiments contained 13.4 MJ ME and 11.5 g lysine/kg (Diet 1), 13.2 g lysine/kg (Diet 2) and 14.9 g lysine/kg (Diet 3). The increase of the amino acid content of the diets seemed to have only a very minor impact on the nitrogen retention and on the growth performance of growing boars, whereas the location effect was found to be significant.

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Section: Discussionsupporting

confidence: 88%

Effect of varying supply of amino acids on nitrogen retention and growth performance of boars of different sire lines

Otten

Berk

Hagemann³

et al. 2013

Arch. Anim. Breed.

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“…The probable explanation for this is that as pigs grow, their digestive tract bacterial profile becomes more stable, especially the hind-gut bacteria (Varel et al, 1982), and also the capacity of the hindgut increases in response to fibrous diets (Bach Knudsen and Jørgensen, 2001). Previous studies have confirmed that the ability of pigs to digest and utilize fibre in the diet is proportional to their age and live body weight (Fernandez et al, 1986;Shi and Noblet, 1993;Reverter et al, 1999;Le Goff et al, 2003). However, Jørgensen et al (1996) found that animals given a high fiber diet in fact had higher daily live weight gain compared with pigs on a low fiber diet.…”

Section: Pig Performancementioning

confidence: 91%

Effect of Dietary Fiber Level on the Performance and Carcass Traits of Mong Cai, F1 Crossbred (Mong횞Cai??Yorkshire) and Landrace횞Yorkshire Pigs

Len¹,

Lindberg²,

Ogle³

2008

Asian Australas. J. Anim. Sci

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:The effects of feeding diets containing 20% (L) or 30% (H) neutral detergent fiber (NDF) (DM basis) on performance and carcass traits were studied in three breeds of pig, including pure Mong Cai (MC), crossbred Landrace×Yorkshire (LY) and crossbred MC×Yorkshire (F1). The experiment had a factorial design with two factors, breed and diet. Eighteen piglets of each breed (60±3 days) were randomly allocated to three treatments: L-L, low fiber diet in both growing and finishing periods; L-H, low and high fiber diet in the growing and finishing period, respectively; and H-H, high fiber diet in both periods. The diets were iso-energetic and iso-nitrogenous within feeding period. The main fibrous ingredients of the diets were rice bran and cassava residue. There were no effects of fiber level on daily dry matter feed intake (DMI), expressed as g/kg metabolic body weight (BW 0.75 ), in both feeding periods (p>0.05). DMI was highest for MC, followed by F1 and LY (p<0.001). Average daily gain (ADG) in L-L and L-H was higher than in H-H in the growing period (p<0.001) and overall (p<0.05), while feed conversion ratio (FCR) was higher in H-H than in L-L and L-H in the growing period (p<0.05) and overall, but no significant differences between treatments were found in the finishing period. In both periods, Landrace×Yorkshire had the highest ADG and the lowest FCR, followed by F1 and Mong Cai (p<0.001). There were no interactions between breed and diet for performance and carcass traits. Carcass and dressing percentage was lower for L-H and H-H than for L-L (p<0.05). There were no significant differences among treatments in back fat thickness and lean meat percentage, or in crude protein and ether extract contents of lean meat. Carcass, dressing and lean meat percentage was highest for LY, lowest for MC and intermediate for F1 (p<0.001). It can be concluded that feeding a high fiber diet in the growing period reduced pig performance, but there was no effect in the finishing period. Pure Mong Cai pigs are not particularly suitable for meat purposes, although the F1 cross with Large White had reasonably good growth performance and carcass quality.

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“…Thus, other factors related to nutrient (and energy) utilization in specific tissues should be implicated in the comparatively lower metabolic efficiency of IB pigs observed in previous studies (Nieto et al, 2002;Rivera-Ferre et al, 2006;Barea et al, 2007). On the other hand, the higher TTAD coefficients observed in IB pigs at higher BW may be mainly related to a more important contribution of the large intestine to the overall digestion of dietary compounds (Ferná ndez et al, 1986;Noblet and Shi, 1993).…”

mentioning

confidence: 85%

Effects of pig genotype (Iberian v. Landrace × Large White) on nutrient digestibility, relative organ weight and small intestine structure at two stages of growth

Barea

Nieto

Vitari

et al. 2011

Animal

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Although the effects of pig genotype on total-tract apparent digestibility (TTAD) have been widely reported in the literature, there is controversial information on the digestive capacity of indigenous breeds compared with lean-type pigs. The strategy of this study was to test the effects of pig genotype and crude protein (CP) supply on performance, digestive utilization of nutrients, relative organ weight and morphometric analysis of the small intestine. Thirty-eight Iberian (IB) and Landrace 3 Large White (LD) pigs were used. Three pigs per genotype were slaughtered at approximately 15 kg BW. The remaining pigs were fed one of two diets differing in CP content (13% or 17% as fed) using a pair-fed procedure. Feeding level was restricted at 0.8 3 ad libitum of IB pigs. Nutrient digestibility and nitrogen (N) balance trials were performed at 30 and 80 kg BW. Four pigs per dietary treatment and genotype were slaughtered at approximately 50 and 115 kg BW. The gastrointestinal tract and the rest of the visceral organs were weighed and samples of the small intestine were taken to carry out histological and histometrical studies. Daily gain and gain-to-feed ratio were higher in LD than in IB pigs during the fattening and growing-fattening periods ( P , 0.01). N TTAD was significantly higher for LD pigs at 30 kg BW ( P , 0.05), whereas at 80 kg BW we observed greater values for digestibility of organic matter and energy in IB pigs (averaging 1.5%, P , 0.01). Both N retention (NR) and efficiency of NR were increased in LD pigs at 30 and 80 kg BW (30% as mean value). The proportional weight of the small intestine was greater in LD than in IB pigs at 50 and 115 kg BW. Histometry showed that IB presented a lower muscle layer thickness than LD pigs in ileum, irrespective of the BW ( P , 0.05). In contrast, LD pigs showed approximately 10% higher ileal villi length and villi-to-crypt ratio than IB pigs at 115 kg BW. CP supply affected to a larger extent the small intestinal micro-anatomical structure of LD pigs at 50 kg BW. In conclusion, our results suggests that although the higher growth rate, NR and efficiency of NR observed in LD pigs might be associated with presumably more efficient structural aspects of the small intestine, the main differences between the two genotypes should be attributed to a larger extent to protein and energy utilization in tissues with consequences for the overall efficiency of energy use.

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Comparative digestibility experiments with growing pigs and adult sows

Cited by 77 publications

References 11 publications

Effect of varying supply of amino acids on nitrogen retention and growth performance of boars of different sire lines

Effect of varying supply of amino acids on nitrogen retention and growth performance of boars of different sire lines

Effect of Dietary Fiber Level on the Performance and Carcass Traits of Mong Cai, F1 Crossbred (Mong횞Cai??Yorkshire) and Landrace횞Yorkshire Pigs

Effects of pig genotype (Iberian v. Landrace × Large White) on nutrient digestibility, relative organ weight and small intestine structure at two stages of growth

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