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Feeding potential of summer grain crop residues for wooled sheep in the south eastern transvaal highveld ii. selection of material and intake



Feeding potential of summer grain crop residues for wooled sheep in the south eastern transvaal highveld ii. selection of material and intake



South African Journal of Animal Science 21(3): 149-152



Dohne Merino wethers grazed crop residues of lupins, dry beans, soybeans, sunflower, sorghum and maize at a stocking rate of 10 wethers/ha. Three wethers in every treatment were esophageally fistulated and during sampling periods the other seven were fitted with fecal bags. Esophageal and fecal samples were taken during the same period every second week. Esophageal samples were separated into grain and straw (including weeds) to determine the grain: straw ratio and were analysed for dry matter (DM), organic matter (OM), crude protein (CP) and in vitro digestible organic matter (IVDOM). Digestible organic matter and protein intake of sheep generally decreased with time as grain availability declined. At commencement of grazing the nutritional value of the residues was sufficient for sheep to increase mass. Crude-potential intake decreased with time and should be supplemented to sustain production.

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