Compositional quality of certain unconventional calcium and phosphorus sources in India for use as mineral supplements for livestock

Lall, D.; Prasad, T.

doi:10.1016/0377-8401(89)90054-0

Cited by 2 publications

(2 citation statements)

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“…Wide variations existed in fluorine (F), Ca and P content in rock phosphates ( Table 4). The rock phosphates used in the present study were obtained from 2 geographical sources and this may have been responsible for the variation in the mineral content (Lall and Prasad, 1989). The presence of high Means in a column not sharing a common superscript differ significantly *(P £ 0·05); **(P £ 0·01).…”

Section: Discussionmentioning

confidence: 97%

“…These alternative P sources also contain fluorine (F) at varied concentrations depending on the geographic source (Lall and Prasad, 1989). The raw rock phosphate is also used in different proportions in CMM preparations, and so the CMM also contain considerable concentrations of F. Since the utilisation of P from these sources also depends on the concentration of F (Gerry et al, 1947;Chang et al, 1977), these P sources were tested for their utilisation in relation to F content both in broiler and layer diets.…”

Section: Introductionmentioning

confidence: 99%

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Utilisation of different phosphorus sources in relation to their fluorine content for broilers and layers

Rao¹,

Reddy²

2001

British Poultry Science

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1. The relative utilisation of different phosphorus sources in relation to their fluorine (F) content was studied in commercial broilers (5 to 40 d) and White Leghorn layers (252 to 364 d). The phosphorus (P) sources tested were bonemeal (BM), low fluorine (LFRP) and high fluorine (HFRP) rock phosphates and a commercial mineral mixture (CMM). The P sources were incorporated in broiler and layer diets by replacing dicalcium phosphate (DCP) on a P basis. 2. The F contents of diets based on BM, LFRP, CMM and HFRP were 53, 365, 622 and 1383 mg/kg in the broiler experiment and 34, 242, 437 and 967 mg/kg in the layer experiment, respectively. F was not detected in DCP based diets. 3. In broilers, body weight gain, food intake, gain: food, P retention and serum inorganic P content on P sources (BM and LFRP) containing F up to 365 mg/kg diet were similar to those on DCP. Body weight gain, food intake, serum calcium and inorganic P contents and retention of P were depressed in groups fed on CMM and HFRP, which may have been due to the toxic effects of F (622 and 1383 mg/kg) present in diets based on these P sources. 4. Bone ash and its P content were not affected by feeding diets containing F up to 1383 mg/kg from various P sources. The amount of F deposited in tibia increased significantly with increases in dietary F concentration. 5. In layers, egg production and food intake were not affected by F up to 437 mg/kg in diets containing BM, LFRP or CMM as the sole source of supplemental P. Egg production and food intake were depressed significantly in layers given the diet containing 967 mg F/kg from HFRP. 6. Egg mass: food, egg weight, shell quality (shell thickness and shell weight) and serum calcium and inorganic P levels were not affected by F up to 967 mg/kg in diets containing different P sources. 7. It may be concluded that the performance of broilers and layers was not affected by feeding various P supplements with dietary levels of F up to 365 and 437 mg/kg, respectively. The reduced performance in broilers and layers observed with some of the P sources may have been due to poor availability of P and/or toxic effects of F (622 and 967 mg/kg, respectively).

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Section: Discussionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Utilisation of different phosphorus sources in relation to their fluorine content for broilers and layers

Rao¹,

Reddy²

2001

British Poultry Science

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The effects of dietary fluoride on growth and bone mineralization in broiler chicks

2011

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Fluoride has been shown to have varying degrees of beneficial effects on bone mineralization and bone strength, despite its toxic effects on growth and leg disorders. Some studies have demonstrated an increase in bone ash resulting from F supplementation. The purpose of the present study was to determine whether low levels of dietary F would have any beneficial effect on the bone strength and leg disorders of young chicks fed P-deficient diets. Effects on BW and feed efficiency were also observed to monitor for F toxicity. One-day-old straight-run Cobb × Cobb broiler chicks were weighed, randomly allocated to treatment groups, housed in electrically heated wire-floored battery brooders, and provided with water and feed for ad libitum consumption. Phosphorus-deficient diets were formulated to induce P rickets with 2 different P sources. Treatment 1 contained feed grade dicalcium phosphate to simulate a commercial diet. Treatment 2 contained purified dicalcium phosphate to represent a diet with minimal F (~0.46 mg/kg). Treatments 3 and 4 used purified dicalcium phosphate as the P source and contained 10 and 20 mg/kg of F from NaF, respectively. Four more treatments were added for experiment 2. Treatments 5, 6, 7, and 8 used purified dicalcium phosphate as the P source and contained 30, 40, 50, and 60 mg/kg of F from NaF, respectively. The analyzed F values in the diet were lower than the formulated values as a result of an unexplained lower than desired rate of recovery (72%) of an internal standard. Chicks fed purified calcium phosphate grew better in experiment 1 (P < 0.05) and had a lower incidence of P-deficiency rickets in experiment 2 (P < 0.01) than did birds fed feed grade dicalcium phosphate. Percentage of bone ash was increased by increasing the F level in the diets in experiment 1, but not experiment 2. It was concluded that even low levels of F, such as those used in the present study, have the potential to increase bone quality.

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Compositional quality of certain unconventional calcium and phosphorus sources in India for use as mineral supplements for livestock

Cited by 2 publications

References 6 publications

Utilisation of different phosphorus sources in relation to their fluorine content for broilers and layers

Utilisation of different phosphorus sources in relation to their fluorine content for broilers and layers

The effects of dietary fluoride on growth and bone mineralization in broiler chicks

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