Effects of dairy cow diet supplementation with carrots, red beet and fodder beet on cow blood serum carotene concentration and milk production

Marinel Guta Florea, Constantin Gavan, Mugurel Colă, Vergil Motorga

Abstract


Provision of fat-soluble antioxidants necessary for cow organism and milk synthesis depends on their concentration in the diet. Administration of the natural vs synthetic forms of carotene and other  bioactive components  has the potential of better bio-availability. The aim of this study wos to estimate the effect of cow diet supplementation with carrots, red beet and fodder beet on the total feed intake, the total carotene concentration in cow blood and milk production. A total of 12 cows of Holstein Fiesian breed were divided into control (CG) and experimental  group (EG). In the EG cow diet was supplemented with 8 % (dry mater bases)  of vegetable mix of carrots (20 %), red beet (20 %) and fodder beet (60 %) in the indoor period (November-December 2017) for 5 weeks. The total weights of dry matter  consumed per day were 20.7 and 19.8 kg respectively, for cows in EG and CG. The carotene concentration in the blood  of cows before supplementation was under the recommended B-carotene level of minimum 3.0 mg/l. During experimental period the increase in carotene concentration in blood of cows was much more in EG, showing the positive effect of carrots, red beet and fodder beet supplementation The mean daily milk yields were 32.9 kg and 31.4 kg for EG and CG, respectively, with a response of 0.4 kg milk for cows in EG. Milk producers can be suggested to add this vegetable to the diet of dairy cows in order to improve B-carotene level in cow blood and to maintain a high milk production.


Keywords


B-carotene, dairy cow, dry matter Intake, milk production, root vegetables.

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References


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LUCRARI STIINTIFICE ZOOTEHNIE SI BIOTEHNOLOGII (SCIENTIFIC PAPERS ANIMAL SCIENCE AND BIOTECHNOLOGIES)

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