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This article in

  1. Vol. 85 No. 3, p. 861-870
     
    Received: June 15, 2006
    Accepted: Oct 28, 2006
    Published: December 8, 2014


    2 Corresponding author(s): iferrepe@vet.ucm.es
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doi:10.2527/jas.2006-388

Anthelmintic and nutritional effects of heather supplementation on Cashmere goats grazing perennial ryegrass-white clover pastures1

  1. K. Osoro*,
  2. A. Mateos-Sanz,
  3. P. Frutos,
  4. U. García*,
  5. L. M. Ortega-Mora,
  6. L. M. M. Ferreira§,
  7. R. Celaya* and
  8. I. Ferre†2
  1. Servicio Regional de Investigación y Desarrollo Agroalimentario (SERIDA), Área de Sistemas de Producción Animal, Consejería de Medio Rural y Pesca, Principado de Asturias, 33300 Villaviciosa, Spain;
    Departamento de Sanidad Animal, Facultad de Veterinaria, Universidad Complutense de Madrid, Ciudad Universitaria s/n, 28040 Madrid, Spain;
    Estación Agrícola Experimental, Consejo Superior de Investigaciones Científicas (CSIC), Finca Marzanas, 24346-Grulleros, León, Spain; and
    CECAV, Departamento de Zootecnia, Universidade de Trás-os-Montes e Alto Douro, PO Box 1013, 5000-911 Vila Real, Portugal

Abstract

To investigate anthelmintic and nutritional effects of heather supplementation in goats grazing perennial ryegrass-white clover pastures, 40 dry Cashmere goats were randomly assigned to 4 treatments in a 2 × 2 factorial arrangement: 2 grazing management treatments (supplementation with heather vs. nonsupplementation) and 2 anthelmintic treatments (treatment vs. nontreatment). Goats grazed continuously from May to September 2004. At the end of the grazing period, the number of dead goats due to gastrointestinal parasitism was 1 in the group supplemented with heather and dosed with anthelmintic, 4 in the group that received neither supplementation nor anthelmintic, and 0 in the other 2 groups. For goats that did not receive anthelmintic treatment, the percentage of heather in the diet was negatively correlated with fecal egg count in August (r = −0.59, P < 0.05) and September (r = −0.49, P < 0.1) and positively correlated (r = 0.54, P < 0.05) with BW changes during the grazing season. Therefore, the correlation coefficient between BW change and fecal egg count was negative (r = −0.62, P < 0.05). Rumen ammonia concentrations were always lower in supplemented goats (P < 0.05). However, VFA concentrations were greater in goats consuming heather (58.9 vs. 50.9 mmol/L), which suggests that ruminal fermentation was not adversely affected by consumption of tannins. Heather availability in the vegetation might represent a valuable opportunity and sustainable method to control gastrointestinal nematode infections in a goat production system based on grazing perennial ryegrass-white clover pastures.

Copyright © 2007. Copyright 2007 Journal of Animal Science