Calcium solubilization and retention in the gastrointestinal tract in chicks (Gallus domesticus) as a function of gastric acid secretion inhibition and of calcium carbonate particle size

Guinotte, F.; Gautron, Joël; Nys, Yves; Soumarmon, Annick

doi:10.1079/bjn19950014

Cited by 96 publications

(45 citation statements)

References 24 publications

(14 reference statements)

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“…1 ⑧⑨) reflects the inflow of bicarbonate and bile from the duodenum associated with reverse peristalsis (Duke, 1992). In addition, calcium salts in the diet work as a buffer to raise the pH in the gizzard (Guinotte et al, 1995;Lawlor et al, 2005;Walk et al, 2012). The inflow and outflow of feed particles simultaneously occur in the gizzard, producing dynamic changes in the pH; as a result, the gizzard contents have various pH values.…”

Section: Groupmentioning

confidence: 99%

Effects of a Whole-grain Paddy Rice Diet on the pH Distribution in the Gizzard and Retention Time of Digesta in the Crop of Broiler Chicks

Nishii¹,

Yasutomi²,

Sone

2016

J. Poult. Sci.

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We previously reported that a diet containing 65% paddy rice suppressed the colonization of Campylobacter jejuni in the cecum of broiler chicks, suggesting that this type of diet has positive effects on upper gastrointestinal tract function in broilers. To reveal the possible mechanisms involved in this antibacterial effect of the whole-grain paddy rice diet, we performed experiments comparing the digesta passage rate in the crop and gizzard, the development of gizzard, and the pH distribution in the gizzard between groups of chicks fed two different diets, such as ground corn and whole-grain paddy rice. During these experiments, we made the following observations: the chicks in the group fed the whole-grain paddy rice diet had more developed gizzards and significantly larger crop content than the chicks in the group fed the ground corn diet. The chicks fed the whole-grain paddy rice diet retained the digesta in the crop for much longer and had less variation in the pH values in the gizzard than those fed ground corn. On the basis of these observations, we concluded that the hardness of the rice hull in whole-grain paddy rice leads to a larger amount and longer retention of content in the crop, as well as the uniformity of the internal pH of the gizzard, by promoting gizzard activity. We speculate that the hardness of the rice hulls promoted the grinding activity of the gizzard, resulting in the long retention time of the digesta in the crop and uniformity of the internal pH of the gizzard, which may sterilize or suppress Campylobacter growth in the gastrointestinal tract of broiler chicks.

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Section: Groupmentioning

confidence: 99%

Effects of a Whole-grain Paddy Rice Diet on the pH Distribution in the Gizzard and Retention Time of Digesta in the Crop of Broiler Chicks

Nishii¹,

Yasutomi²,

Sone

2016

J. Poult. Sci.

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“…Elevated dietary Ca levels increase pH in the gut and, as a result, P absorption [93] and retention [91] are decreased. High dietary Ca concentration can significantly increase gastrointestinal pH [94] and decrease not only phytate hydrolysis, but also pepsin activity in the proventriculus/gizzard and reduce apparent ileal protein digestibility [51]. High plasma P levels decrease Ca absorption from the gut [95].…”

Section: Calciummentioning

confidence: 99%

Phosphorus Bioavailability: A Key Aspect for Conserving this Critical Animal Feed Resource with Reference to Broiler Nutrition

Zhang

Yang

et al. 2016

Agriculture

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Phosphorus (P) is an essential element, and the majority of animal feed phosphate is derived from phosphate rock that is a non-renewable resource. Current global P reserves may be depleted in 50-100 years. This poses the challenge of securing future P supply for the global animal feed industries. Currently, nutritionists formulate diets with substantial safety margins to guarantee that animals do not become P deficient. Excessive dietary P concentrations increase, not only the cost of diets, but also P excretion and pollution of the environment. We contend that understanding P bioavailability is central to the sustainable use of this mineral in animal agriculture. Poultry accounts for approximately 50% of animal feed phosphate consumption worldwide and for this reason we use the meat chicken or broiler as a case study to explore the nuances of P bioavailability. We conclude that, to tackle the challenge of dietary P bioavailability, cooperative research on a global scale is needed to standardise measurement procedures in order to produce a robust and reliable database which can be used by nutritionists to formulate diets to meet the bird's P requirements precisely. Achievement of this goal will assist endeavours to sustain the global supply of phosphorus.

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“…WVR contains malic acid, acetic acid, and lactic acid, which have been shown to lower intestinal pH as dietary acidifiers (Kadim et al, 2008;Moharrery, 2005;Soltan, 2008), and a low pH in the upper part of the gastrointestinal tract of laying hens was found to favor pepsin activity and facilitate the solubility and absorption of mineral salts (Guinotte et al, 1995).…”

Section: Discussionmentioning

confidence: 98%

Effects of waste vinegar residue on nutrient digestibility and nitrogen balance in laying hens

et al. 2012

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Calcium solubilization and retention in the gastrointestinal tract in chicks (Gallus domesticus) as a function of gastric acid secretion inhibition and of calcium carbonate particle size

Cited by 96 publications

References 24 publications

Effects of a Whole-grain Paddy Rice Diet on the pH Distribution in the Gizzard and Retention Time of Digesta in the Crop of Broiler Chicks

Effects of a Whole-grain Paddy Rice Diet on the pH Distribution in the Gizzard and Retention Time of Digesta in the Crop of Broiler Chicks

Phosphorus Bioavailability: A Key Aspect for Conserving this Critical Animal Feed Resource with Reference to Broiler Nutrition

Effects of waste vinegar residue on nutrient digestibility and nitrogen balance in laying hens

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