The Effect of Feeding Two Sources of Boron on Broiler Breeder Performance

Rossi, Alfredo; Miles, R. D.; Bootwalla, S. M.; Wilson, H. R.; Eldred, A. R.

doi:10.3382/ps.0721931

Cited by 11 publications

(13 citation statements)

References 5 publications

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“…In agreement with Rossi et al (1990b), 200-250 mg/kg dietary boron had no effect on egg production (Table 3). This result contrasts with those of Qin and Klandorf (1991) where boron supplementation at 100 mg/kg caused a decrease in egg production in one of two experiments.…”

Section: Effects Of Boron On Henssupporting

confidence: 86%

Effects of dietary boron supplementation on laying hens

Wilson

Ruszler

1996

British Poultry Science

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1. The effects of dietary boron on egg production and on the ultimate shear force, stress, and fracture energy of the tibia, femur, humerus, and radius from White Leghorn laying hens were investigated. 2. The shear force, stress, and fracture energy of the bones were not affected by increasing dietary concentrations of boron. 3. Egg production, food consumption and body weight were suppressed at a dietary boron concentration of 400 mg/kg. 4. Boron concentrations increased significantly in all tissue samples tested in birds given 400 mg/kg dietary boron.

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Section: Effects Of Boron On Henssupporting

confidence: 86%

Effects of dietary boron supplementation on laying hens

Wilson

Ruszler

1996

British Poultry Science

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“…This negative effect was not observed in hens fed a LCa diet (Table 2). Previous studies have shown that supplementation of a young broiler breeder hens diet with 250 ppm of B did not adversely affect EP (Rossi et al, 1990a). In view of these observations, the toxic effect of B may be associated with the age or the physiological status of the hen in addition to the level of dietary Ca.…”

Section: Discussionmentioning

confidence: 86%

“…The mechanism by which B exerts these negative effects is not understood but studies have shown B is toxic to chick fibroblasts in culture (Lee et al, 1990), chick embryos (Lee and Emmel, 1990), and causes a decrease in the hatchability of chicks (Rossi et al, 1990a). Boron is suggested to exert these negative effects through a decrease in mRNA synthesis and by complexing with biologically active compounds, including enzymes and hormones (S. R. Lee, 1990, Dept.…”

Section: Table 3 Effect Of Boron On Egg Production and Shell Qualitymentioning

confidence: 97%

Effect of Dietary Boron Supplementation on Egg Production, Shell Quality, and Calcium Metabolism in Aged Broiler Breeder Hens

Qin

Klandorf

1991

Poultry Science

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Three experiments were conducted using aged broiler breeder hens (greater than 60 wk) to investigate the effects of supplemental B on egg production (EP), shell quality, and Ca metabolism. Experiment 1 had a 2 x 2 factorial arrangement of treatments: 1) high Ca (3.5%); 2) high Ca plus B; 3) low Ca (1.5%); and 4) low Ca plus B; using 32 60-wk-old hens. The B levels were basal and 100 ppm supplemental for the first 2 wk of the experiment and reduced to 60 ppm for the remaining 3 wk. Egg production, shell thickness (ST), and egg specific gravity (SG) were recorded weekly. In Experiment 2, 40 60-wk-old hens were divided into two groups: high and low shell quality. Each group was further divided into two subgroups and fed a low-Ca basal diet with or without supplemental B. The level of B supplementation and the experimental period was the same as in Experiment 1. In Experiment 3, 52 75-wk-old hens were force-molted. After molting, 36 hens were fed a commercial layer diet with the remaining 16 hens fed the control diet supplemented with 100 ppm B. Blood samples were taken during the nonlaying and laying periods, respectively. The results showed that B significantly (P less than .05) depressed EP in Experiment 1 but not in Experiments 2 and 3. Supplemental B decreased plasma Ca when hens were fed a diet containing high Ca levels (3.5%). Supplemental B did not affect SG, ST, or Ca retention, but did significantly increase tibial bone ash percentage (P less than .05).(ABSTRACT TRUNCATED AT 250 WORDS)

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“…Rossi et al (1990a) have also reported that 320 mg/kg boron depressed growth, feed consumption, and mortality rate of broiler chicks at 21 days of age; however, boron supplementation did improve feed efficiency at 49 days. Broiler breeders fed 250 mg/kg boron produced eggs with decreased hatchability at 31 wk of age (Rossi et al, 1990b).…”

Section: Introductionmentioning

confidence: 99%

Studies to Determine Whether an Interaction Exists Among Boron, Calcium, and Cholecalciferol on the Skeletal Development of Broiler Chickens

Elliot

Edwards

1992

Poultry Science

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Two experiments were designed to determine the effect of dietary boron on broiler cockerels and four experiments were conducted to determine whether an interaction exists among dietary boron, cholecalciferol, and calcium. The parameters measured were weight gain, feed efficiency, tibia bone ash, rickets, tibial dyschondroplasia, and plasma minerals. All experiments were conducted with tibial dyschondroplasia-inducing basal diets fed to broiler cockerels from 1 to 16 days of age. Experiments 1 and 2 had four levels of dietary boron (0, 20, 40, and 80 mg/kg (Experiment 1) and 0, 5, 10, and 20 mg/kg (Experiment 2). Boron had no effect on weight gain, feed efficiency, or plasma minerals in either experiment. In Experiment 2, increasing levels of boron had no influence on tibial dyschondroplasia but did exert a quadratic effect on bone ash with 5 and 10 mg/kg boron increasing bone ash. In Experiment 1, bone ash and the incidence of tibial dyschondroplasia were unaffected, but the severity of tibial dyschondroplasia linearly increased by increasing boron levels. Experiments 3 to 6 had a 2 x 2 x 2 factorial arrangement of treatments with calcium at .65 and .90%, cholecalciferol at 110 and 1,100 ICU/kg, and boron at 0 and 40 mg/kg (Experiments 3 to 5) or 0 and 3 mg/kg (Experiment 6). The higher levels of calcium and cholecalciferol improved weight gain, decreased the incidence of rickets, and decreased the incidence and severity of tibial dyschondroplasia. Feeding cholecalciferol at 1,100 ICU/kg increased plasma calcium and plasma dialyzable phosphorus and decreased plasma magnesium. Calcium at .90% had no effect on plasma magnesium or plasma dialyzable phosphorus and increased plasma calcium only in Experiment 4. The only response to boron in Experiments 3 to 6 was a boron effect and a boron by cholecalciferol interaction on bone ash in Experiment 3, in which boron reduced bone ash at .65% calcium and 110 ICU/kg cholecalciferol. From these experiments, there is no indication that an interaction among boron, cholecalciferol, and calcium exists in broiler cockerels.

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The Effect of Feeding Two Sources of Boron on Broiler Breeder Performance

Cited by 11 publications

References 5 publications

Effects of dietary boron supplementation on laying hens

Effects of dietary boron supplementation on laying hens

Effect of Dietary Boron Supplementation on Egg Production, Shell Quality, and Calcium Metabolism in Aged Broiler Breeder Hens

Studies to Determine Whether an Interaction Exists Among Boron, Calcium, and Cholecalciferol on the Skeletal Development of Broiler Chickens

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