NUTRIENT DIGESTIBILITY AND NITROGEN BALANCE FOR HIGH-PRODUCTIVE COWS FED BY POLYSACCHARIDES

NUTRIENT DIGESTIBILITY AND NITROGEN BALANCE FOR HIGH-PRODUCTIVE COWS FED BY POLYSACCHARIDES

The cows of the reference group obtained beet molasses, groups 2 and 3 — 100 and 150 g of polysaccharides per head daily. 150 g of polysaccharides increased gross yield of 4%–milk by 6.18%, milk protein — by 4.87%. Daily milk yield for the third group made up 33.15 kg, exceeding the reference group by 2.27 kg. Dry and organic matter digestibility had no significant differences among the groups. Crude protein digestibility was higher for the cows fed by polysaccharides. 150 g of polysaccharides significantly increased crude fiber digestibility up to 54.4% versus 50.8% of the reference variant. Nitrogen digestibility was better for the second and third groups. Nitrogen excretion via urine for the reference group was 302.16 g versus 296.9 and 283.79 g for the experimental groups. Increase in nitrogen excretion significantly affected its utilization being 166.31 g for the reference group and 178.72 g — for the third group. All the groups had positive nitrogen balance, but the third group exceeded the reference one by 10.5%. 150 g of polysaccharides increased nitrogen secretion through milk and milk productivity.

Source: http://kormoproizvodstvo.ru/en/archive/4-2017/ , p. 30

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