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Rations digestibilty in milking cows depending on the method of feeding concentrates preparation  [2016]

Sitnikov, V.A. Yunusova, O.Yu. Panyshev, A.I. Popov, A.N., Perm State Agricultural Academy (Russian Federation)

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The research was conducted on the cows of black and motley breed (2 groups, 15animals in each) in one of the farms of Perm region. Lactating cows of control group were fed concentrates, consisting of 4.3 kg of crushed grain mixture (barley, wheat, oats), in addition to main ration (cereal herb hay 9 kg, galega haylage 9 kg), and cows of experiment group – 6 kg of hydrolyzed grain mixture (equivalent by the content of dry matter). After hydrobarothermal treatment of grain mixture, the sugar content in hydrolyzate increased calculating using absolutely dry matter from 37.2 g/kg to 73.4 g/kg due to partial starch hydrolysis, energetic value decreased by 0.16 MJ. Free amino acids and fat which passed to volatile forms, and were removed into atmosphere when hydrolyzating. The experiment showed that the cows of the experiment group better digested dry and organic matters, crude protein, crude fat, crude fibre, and free-nitrogen extract in comparison to analogues of the control group by 2.22%, 2.32% (P less than 0.05), 1.88%, 2.69% (P less than 0.05), 1.60% and 2.71%, respectively. Higher digestibility ratios in the experiment group were result of sugar content increase in hydrolyzed grain, and therefore in ration. In cows group fed with grain mixture hydrolyzate, average daily milk yield was 16.42 kg, which is 1.04 kg or 6.76% higher compared to the animals, that were fed crushed grain mixture. Milk quality in cows fed with hydrolyzate was by 0.37% higher on fat
mass content. High fat mass content in milk of both groups was consequence of hay-haylage feeding. The hydrobarothermal method of preliminary treatment of grain mixture is considered to be effective.

From the journal

Perm Agrarian Journal

ISSN : 2307-2873