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Effect of supplementation and parasitic infection on productivity of Thai native and cross-bred female weaner goats I. Growth, Parasite infestation and blood constituents |
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W. Pralomkarn, S. Kochapakdee, S. Choldumrongkul, S. Saithanoo |
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| Abstract |
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This paper presents the effects of supplementary feeding and internal parasites on the growth rates of female weaner goats raised under improved management. A completely randomized 3 ?? 3 ?? 2 factorial design was used. Factors were genotype (Thai native: TN, 75% TN ?? 25% Anglo-Nubian: An and 50% TN ?? 50% AN), feeding grazing only, low (1.0% BW/d) and high (1.5% BW/d) supplementation and parasite control (undrenched and drenched). It was shown that native goats had significantly (p<0.05) higher growth rates than did the cross-bred goats from 12-24 weeks of the trial. The growth rate of goats grazing improved pasture depended on the amount of concentrate offered as a supplement. There was no significant difference in growth rates between undrenched and drenched goats. There was no interaction effect on growth rates between the treatments. Drenched goats had significantly (p<0.01) lower egg counts per gram of gastro-intestinal nematode than did undrenched goats. There was no significant difference between the treatments for blood constituents (total protein, haemoglobin, packed cell volume, eosinophils, lymphocytes, monocytes and basophils). |
| Keywords:
Thai Goat; Anglo-Nubian Cross-Bred; Feeding; Supplementation; Drenching |
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