Separate feeding of calcium improves performance and ileal nutrient digestibility in broiler chicks

Wilkinson, Stuart; Selle, Peter H.; Bedford, M.R.; Cowieson, A. J.

doi:10.1071/an12432

Cited by 45 publications

(48 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…High dietary Ca concentrations adversely influenced apparent nutrient digestibility (Underwood & Suttle, 2001). The current findings are in general agreement with previous reports (Rao et al, 2006;Tancharoenrat & Ravindran, 2014;Wilkinson et al, 2014). One possible explanation for the negative effects of high Ca may be the increase in pH in the upper gastrointestinal tract.…”

Section: Resultssupporting

confidence: 83%

Effects of dietary oil sources and calcium : phosphorus levels on growth performance, gut morphology and apparent digestibility of broiler chickens

Abdulla¹,

Loh²,

Akit³

et al. 2016

SA J. An. Sci.

View full text Add to dashboard Cite

The study investigated the effects of varying dietary calcium (Ca) levels and sources of oil on performance of broiler chickens. A total of 378 one-day-old birds were fed 6% palm oil (PO), soybean oil (SO) or linseed oil (LO) in combination with three levels of Ca, 1%, 1.25% and 1.5%, for six weeks in a 3 x 3 factorial experiment. Birds fed diet supplemented with SO and PO had higher average daily gains, more abdominal fat and greater villi height compared with those fed LO. However, feed efficiency, apparent digestibility of organic matter, ether extract, crude protein and ash were similar across treatments. Regardless of oil source, the chickens fed diets containing 1.5% Ca had a lower bodyweight and apparent digestibility of organic matter, crude protein, ether extract and phosphorus (P) than those fed 1% and 1.25% Ca. In contrast, the birds fed 1.25% Ca had higher ash, Ca and P digestibility than did the 1% Ca birds. Interaction between source of oil and Ca level on mineral digestibility was significant. It can be concluded that palm oil could be used as an alternative to soybean and linseed oils to improve growth performance in broiler chickens. Moreover, increasing the level of Ca to 1.25% can improve broiler performance and apparent nutrient digestibility, regardless of the type of oil used in the current study. ______________________________________________________________________________________

show abstract

Section: Resultssupporting

confidence: 83%

Effects of dietary oil sources and calcium : phosphorus levels on growth performance, gut morphology and apparent digestibility of broiler chickens

Abdulla¹,

Loh²,

Akit³

et al. 2016

SA J. An. Sci.

View full text Add to dashboard Cite

show abstract

“…The negative effect of high dietary Ca on N digestion in poultry, while in agreement with the findings Shafey and McDonald (1991a, b) and Wilkinson et al (2014), is not readily explainable. It may be speculated that the increased pH in the gastric phase created by the provision of high levels of Ca as limestone (Ca carbonate), a source with extremely high acidbinding capacity (Lawlor et al, 2005), may be partly responsible.…”

Section: Discussionsupporting

confidence: 75%

Influence of Dietary Calcium Concentration on the Digestion of Nutrients along the Intestinal Tract of Broiler Chickens

Mutucumarana

Ravindran

et al. 2014

J. Poult. Sci.

View full text Add to dashboard Cite

The effects of dietary calcium (Ca) concentration on the digestion of Ca, phosphorus (P), nitrogen (N), fat and starch along the intestinal tract of broilers were assessed. Three-week old broilers were fed maize-soy diets containing 6, 9 or 12 g/kg of Ca (Ca: total P ratios of 1:1, 1.4:1 and 2:1, respectively) for six days and digesta were collected from the duodenum, jejunum, upper ileum and lower ileum. Apparent digestibility coefficients of P, Ca, N, fat and starch in different intestinal segments were calculated based on indigestible marker ratios in the diet and digesta. Apparent digestibility coefficients of P and Ca were determined to be negative in the duodenum. Apparent P digestibility was reduced (P＜0.05) by increasing dietary Ca concentrations, but there was a Ca x intestinal site interaction (P＜0.05). Jejunum was the major site of P absorption in birds fed the low Ca and normal Ca diets, but both the jejunum and upper ileum were involved in birds fed high Ca diets. Dietary Ca concentration had no effect (P ＞0.05) on apparent Ca digestibility. Calcium was absorbed predominantly in the jejunum. Digestibility of N and fat was reduced (P＜0.05) by increasing dietary Ca concentrations. A significant (P＜0.05) dietary Ca x intestinal site interaction was observed for N. In birds fed low Ca and normal Ca diets, N was primarily digested by the end of jejunum, but in birds fed high Ca diet both jejunum and upper ileum were involved. At all dietary Ca concentrations, fat was digested mainly in the jejunum and upper ileum, but digestion continued in the lower ileum. Apparent starch digestibility and AME were unaffected (P＞0.05) by dietary Ca concentrations. Most of the starch digestion was completed by the end of the jejunum. The present data suggest that the site of digestion of P and N shifts depending on dietary Ca concentrations. Increasing dietary Ca concentrations negatively influenced the digestion of P, N and fat, but had no effect on those of Ca and starch.

show abstract

“…Therefore, reducing dietary Ca may increase nutrient digestibility of poultry diets by decreasing the intestinal pH as well as the formation of Ca-phosphate precipitates and improving pepsin efficacy (Selle et al, 2009;Walk et al, 2012). Wilkinson et al (2013) demonstrated that broilers fed diets with reduced Ca concentrations were able to broadly meet their Ca requirement via the consumption of a separate Ca source. However, the influence of nPP on the Ca-specific appetite of broilers and their ability to meet their Ca requirement through the consumption of a separate Ca source has not previously been reported.…”

Section: Discussionmentioning

confidence: 97%

“…Given the choice, poultry are able to self-select a balanced diet from different and complementary sources to meet their nutrient requirements. Recently, Wilkinson et al, (2013) demonstrated that contemporary broilers were able to broadly meet their Ca requirement when fed diets with as little as 0.25% Ca and a concurrent source of Ca. Coupled with this result were improved performance and increased apparent digestibility of DM, amino acids, and minerals, suggesting that this Ca-specific appetite may be able to be commercially exploited to enhance performance and possibly welfare of broilers.…”

Section: Effect Of Dietary Nonphytate Phosphorus and Calcium Concentrmentioning

confidence: 99%

Effect of dietary nonphytate phosphorus and calcium concentration on calcium appetite of broiler chicks

et al. 2014

View full text Add to dashboard Cite

The effect of dietary nonphytate P (nPP) and Ca concentration on the Ca appetite in broilers was evaluated. A total of 288 one-day-old male Ross 308 broilers were fed a commercial diet for 7 d then randomly allocated to 1 of 8 dietary treatments for a 28-d study. Diets were corn-soybean meal based and formulated to be nutritionally adequate except for nPP and Ca. Two concentrations of Ca (5.0 and 10.0 g/kg) and 4 of nPP (2.5, 3.5, 4.5, and 5.5 g/kg) were used, and all birds had access to a separate Ca source (CaCO3). Bird performance, nutrient digestibility, and tibia ash were determined. Birds fed 5.0 g of Ca/kg diets consumed more (P < 0.01) of the separate Ca source than birds fed diets containing 10.0 g of Ca/kg. Increased consumption (P < 0.01) of the separate Ca source was associated with increasing nPP concentration. Bird performance was not influenced by dietary treatment. Birds fed 5.5 g of nPP/kg diets had lower (P < 0.01) digestibility of DM, CP, and energy than the other groups. Phosphorus digestibility was reduced in birds fed high Ca diets and those fed 2.5 g of nPP/kg diets (P < 0.001). Birds fed 2.5 g of nPP/kg had lower tibia ash values than those fed higher concentrations of nPP while feeding diets containing 10.0 g of Ca/kg led to higher concentrations (P < 0.05) of tibia ash than for birds fed 5.0 g of Ca/kg. This study confirms previous findings that birds are able to meet their Ca requirement when fed Ca separately from the mixed ration. Consumption of the separate Ca source responded to not only Ca concentration but also to the amount of nPP in the diet. These data suggest that dietary nPP concentration influences the Ca specific appetite of broilers, and this may indicate that birds attempt to regulate their intake of Ca relative to nPP. This may be mediated via a physiological mechanism to maintain an appropriate Ca:nPP intake.

show abstract

Separate feeding of calcium improves performance and ileal nutrient digestibility in broiler chicks

Cited by 45 publications

References 31 publications

Effects of dietary oil sources and calcium : phosphorus levels on growth performance, gut morphology and apparent digestibility of broiler chickens

Effects of dietary oil sources and calcium : phosphorus levels on growth performance, gut morphology and apparent digestibility of broiler chickens

Influence of Dietary Calcium Concentration on the Digestion of Nutrients along the Intestinal Tract of Broiler Chickens

Effect of dietary nonphytate phosphorus and calcium concentration on calcium appetite of broiler chicks

Contact Info

Product

Resources

About