Effect of Dietary Sodium Zeolite A and Excess Calcium on Growth and Tibia Calcium and Phosphorus Concentration in Uninfected and Eimeria acervulina- Infected Chicks
1989; Elsevier BV; Volume: 68; Issue: 9 Linguagem: Inglês
10.3382/ps.0681236
ISSN1525-3171
AutoresKevin Watkins, D.B. Vagnoni, L. L. Southern,
Tópico(s)Veterinary medicine and infectious diseases
ResumoTwo identical trials were conducted with 5 to 14-day-old broiler chicks. Sodium zeolite A (NZA, 0 and .75%) and Ca (1.0 and 1.5%) were fed to both uninfected and Eimeria acervulina- infected chicks resulting in a 2 × 2 × 2 factorial arrangement of treatments. Coccidial infection reduced weight gain and gain:feed (P<.01), and tibia ash, Ca, and Ca:P ratio (P<.05). Excess dietary Ca reduced (P<.05) weight gain and tibia ash in uninfected chicks but had no effect (P>.10) in coccidiosis-infected chicks (Ca × coccidiosis interaction, P<.05). Addition of NZA to diets with excess Ca further decreased (P<.05) weight gain and tibia ash in both uninfected and E. acervulina- infected chicks. Tibia Ca, as a percentage of dry fat-free tibia, was reduced (P<.05) by the addition of NZA. This effect was not observed when tibia Ca was expressed as a percentage of ash. These results suggest that NZA may exacerbate the adverse effects of excess dietary Ca.
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