Mineral nutrition of goats
World literature on mineral nutrition of dairy goats was reviewed. No daily requirements of minerals for goats under different production conditions have been found. Cows, sheep, and goats differ in milk, blood, and tissue contents of minerals. Goats milking between 0.8 and 2.0 kg/day were in positive calcium and phosphorus balance when receiving between 7.7 and 21.6 g calcium oxide and 6.6 to 13.5 g phosphorus oxide in the feed daily and when sources of vitamin D were provided. Supplies of 238 mg magnesium per day were too small for normal milk production. A concentration of 1.74 g sodium per kilogram feed dry matter allowed normal milk production and growth of goats. Dietary supplies of 0.03 percent ferrous iron produced normal ruminal epithelial color. Copper deficiencies can develop in the presence of cadmium and sulfur pollution. A minimum of 10 ppm of zinc is necessary for normal functions. Zinc deficiency produced changed sex ratios in favor of female twins. Goats fed 5 ppm manganese daily developed signs of deficiences including changed sex ratios in favor of male twins
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| Format: | biblioteca |
| Published: |
1980
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| Subjects: | CAPRINOS, NUTRICION ANIMAL, REQUERIMIENTOS NUTRICIONALES, MINERALES, |
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