Calcium transport in chicken leukocytes and erythrocytes

Porter, Dale W.; Martin, William G.; Lee, P; Kaczmarczyk, Walter

doi:10.1016/0300-9629(90)90248-q

Cited by 4 publications

(1 citation statement)

References 19 publications

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“…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. of Animal and Poultry Sciences, University of Arkansas, Fayetteville, AR 72701, personal communication).…”

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

confidence: 96%

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

confidence: 96%