The effect of dietary crude protein content on apparent and true ileal nitrogen and amino acid digestibilities

Donkoh, A.; Moughan, Paul J.

doi:10.1079/bjn19940009

Cited by 39 publications

(26 citation statements)

References 15 publications

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“…However, glycine, serine and phenylalanine IAD decreased, whereas that of cystine increased. A reduction in the protein intake might result in a disproportionate effect on the IAD of several AAs present in low proportion in the diet but preponderant in the endogenous losses as glycine and serine, as also observed in pigs (Donkoh and Moughan, 1994).…”

Section: Discussionmentioning

confidence: 77%

Effect on digestion and performance of dietary protein content and of increased substitution of lucerne hay with soya-bean protein concentrate in starter diets for young rabbits

Chamorro

Gómez-Conde

Rozas

et al. 2007

Animal

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The aim of this work was to study the effect of protein source / availability on the intestinal microbiota, digestive traits and nutritional performance of early-weaned rabbits. The effects of supplemental antibiotics in the drinking water were also evaluated. Four isoenergetic and isofibrous diets were formulated: a control diet with a high protein (207 g/kg dry matter (DM)) and lucerne hay content (HPHL), a diet with low crude protein (CP) (179 g/kg DM) and high lucerne hay content (LPHL) and low protein diets in which the lucerne hay in diet LPHL was replaced partially (LPML) or totally (LPLL) with soya-bean protein concentrate. Rabbits, weaned at 25 days (52 per diet), were fed the experimental diets for a 2-week period and thereafter received a commercial diet until 56 days of age. The incidence of mortality was investigated using 70 animals per diet without supplemental medication. The profile of the ileal microbiota was studied at 35 days of age in rabbits treated (18 per diet) or not (12 per diet) with antibiotic. As expected, supplementation with antibiotics effectively reduced fattening mortality rate and microbial biodiversity. However, lowering of also the dietary CP content led to a reduction in the mortality rate ( P , 0.05), both in animals treated with (by 80%) or without (by 39%) antibiotics. In addition, there was a reduction ( P , 0.05) in the frequency of Clostridium perfringens in nonmedicated animals. Neither jejunal morphology nor growth performance, over the whole fattening period, was affected by dietary CP content of the experimental diets. However, with HPHL, feed efficiency was higher (by 4.8%; P , 0.01) than with LPHL diets. Substitution of lucerne hay with soya-bean meal in low protein diets did not affect apparent faecal or ileal digestibility of DM and CP. However, the ileal digestibility of cystine, alanine, aspartic acid, and proline was lowered ( P , 0.05) with increasing substitution by soya bean. Nevertheless, ileal CP flow, incidence of mortality and presence of C. perfringens were unaffected. Our results suggest that a reduction in dietary CP, resulting in reduced lumenal flows of nitrogen through the ileum, may be beneficial for young rabbits and limit the numbers of potentially harmful bacteria in the lower gut. Modulation of dietary CP should be contemplated as a strategy to increase the intestinal health in rabbits.

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Section: Discussionmentioning

confidence: 77%

Effect on digestion and performance of dietary protein content and of increased substitution of lucerne hay with soya-bean protein concentrate in starter diets for young rabbits

Chamorro

Gómez-Conde

Rozas

et al. 2007

Animal

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“…The effects of dietary CP content on the AID values of AA and protein have been reported in broilers (Donkoh & Moughan, 1994), rats (Sarwar & Peace, 1986;Donkon & Moughan, 1994) and growing pigs (Furuya & Kaji, 1989;Keith & Bell, 1991;Fan et al, 1994), indicating that an increase of dietary protein might lead to a greater AID of AAs. Eggum (1973) illustrated that AFD of CP in soybean meal increased curvilinearly with increasing CP concentration in a rat diet.…”

Section: Discussionmentioning

confidence: 97%

Impact of dietary glutamine on amino acid digestibility values and intestinal morphometric parameters in neonate chicks

Namroud¹,

Saifeddine²,

Zaghari³

et al. 2017

SA J. An. Sci.

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Two experiments were conducted to investigate the effects of fortification of the pre-starter diet with glutamine in post-hatch broiler chicks. In the first experiment, male chicks were used to study the impact of glutamine supplementation at three levels (0%, 1% and 2%) on performance, apparent faecal digestibility (AFD) and ileal digestibility (AID) of amino acids (AAs), as well as intestinal morphometric parameters from 0 to 14 days old. The best performance was obtained at 1% supplementation. Average daily feed intake and feed conversion ratio (FCR) were affected by treatments. Supplementing diets with glutamine resulted in increase of digestibility values for arginine (Arg), lysine (Lys), isoleucine (Ile) and valine (Val). Glutaminesupplemented diets led to higher villus height (VH) and shallower crypt depth (CD) in the jejunum and ileum. A second experiment was performed to investigate whether the form of glutamine could affect performance and morphometric parameters in newly hatched chickens. A control diet was prepared, based on casein as the sole source of protein-bound AAs. Three diets based on synthetic AAs were used to obtain nutrient values of the control diet, which were supplemented with a synthetic form of glutamine, glutamic acid and a 50 : 50 ratio of glutamine : glutamic acid. Chickens fed the control diet presented higher average daily weight gain and better FCR. None of the AID coefficients of amino acids were influenced by the dietary treatments, except glutamic acid and aspartic acid, which were decreased in chicks fed synthetic AAs. In conclusion, 1% glutamine supplementation improved performance, morphometric parameters and AID and AFD values of cationic AAs. The form in which dietary glutamine was provided could affect performance. ______________________________________________________________________________________

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“…In addition, the levels of dietary crude protein or dietary amino acids in the diets tested are important (Sauer et al, 1989;Donkoh and Moughan, 1994;Fan et al, 1994). Chae (1996) conducted a digestibility trial with only maize and sorghum in early-weaned pigs and obtained very low apparent ileal digestibility coefficients.…”

Section: Grain Processing and Ileal Digestibilitymentioning

confidence: 99%

“…Apparent ileal digestibility can be greatly influenced by endogenous protein recoveries. Donkoh and Moughan (1994) conducted an experiment with meat-and-bone meal to investigate the effects of dietary protein content (25,60,95,130,165 and 200 g CP/kg diet) on the apparent ileal digestibility of N and amino acids in growing rats. As dietary protein content increased from 25 to 200 g/kg, so did apparent ileal digestibility for all amino acids examined.…”

Section: Grain Processing and Ileal Digestibilitymentioning

confidence: 99%

Effects of particle size and extrusion of maize and sorghum on ileal digestibility and growth performance in pigs weaned at 14 and 21 days of age

Chae¹,

Kim²,

Han³

et al. 2000

J. Anim. Feed Sci.

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Two experiments were conducted to compare apparent ileal digestibilities and growth performance in pigs fed ground and extruded maize and sorghum. In Experiment 1, for digestibility, 24 early-weaned pigs (14 d old and 3.2 kg BW; EW) were given a terminal ileum exteriorization, and another 24 conventionally-weaned (CW) piglets (21 d old and 6.3 kg BW) were fitted with simple T-cannulae. An additional 8 piglets were employed for correction of endogenous amino acid excretions. Dietary treatments consisted of six differently processed maize and sorghum diets: 1. maize 900 )Ltm, 2. maize 400 |Um, 3. extruded maize, 4. sorghum 900 [im, 5. sorghum 400 |im, and 6. extruded sorghum. In Experiment 2, 150 piglets (21 d of age and 6.4 kg BW) were allotted to the same dietary treatments and used in a 33-d feeding trial.Reduced particle sizes of the grains from 900 to 400 |Lim tended to improve the apparent ileal digestibilities (AID) of Thr, Val, Leu, and Lys in maize and Thr, Val, and Leu in sorghum for EW, but not for CW piglets. The AID of essential amino acids were higher (P<0.05) in CW than in EW piglets. In true ileal digestibilities (TID) of essential amino acids in tested grains, there was a similar trend with the AID of essential amino acids, with the exception of improvement by 10.7% in EW, and in TID of essential amino acids, respectively, between weaning ages. Extrusion of maize and sorghum did not improve the ileal digestibilities of amino acids, but the digestibility of Met in sorghum was improved (P<0.05) in EW pigs as compared with ground maize and sorghum. Between maize and sorghum, the ileal digestibility of amino acids was similar. During the overall period (d 0 to 33), diets with extruded maize and sorghum reduced ADFI (PO.05) and improved gain/feed (PO.05) by 3%o compared with diets with the ground grains.In conclusion, the ileal digestibility of amino acids in the grains was considerably affected by weaning ages of piglets, while ileal digestibility of amino acids and growth of pigs was not affected by reductions in particle sizes of maize and sorghum from 900 to 400 mm in complex weaner diets.

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The effect of dietary crude protein content on apparent and true ileal nitrogen and amino acid digestibilities

Cited by 39 publications

References 15 publications

Effect on digestion and performance of dietary protein content and of increased substitution of lucerne hay with soya-bean protein concentrate in starter diets for young rabbits

Effect on digestion and performance of dietary protein content and of increased substitution of lucerne hay with soya-bean protein concentrate in starter diets for young rabbits

Impact of dietary glutamine on amino acid digestibility values and intestinal morphometric parameters in neonate chicks

Effects of particle size and extrusion of maize and sorghum on ileal digestibility and growth performance in pigs weaned at 14 and 21 days of age

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