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- W2347720231 abstract "To study the effect of the addition of β-Carotene in experimental diets on lactating and reproduction performance.Thirty-six head of Holstein cows were selected according to the principle of same parity,similar milk production,body weight and body condition score.The cows were randomly divided into three groups:control group(basic diet+150 000 IU VA/(head·day));treatmentⅠ(control diet+300 mg β-carotene);treatmentⅡ(control diet +600 mg β-carotene).The trial last for 15 days for adaptation,and for 120 days for sampling.The results showed that there was no difference in milk composition and somatic cell counts of first 3-month postpartum between TRTⅠ,TRTⅡ and CK when cows were fed with vitamin A at the level of 150 000 IU/d and supplemented with β-carotene at the level of 300 or 600 mg/d for each cow.After 3 months of postparturiency,the milk yield and fat-corrected milk yield were decreased in control group animals,but increased in the lactating cows for two β-carotene treatment groups.Supplementation of β-carotene resulted in an increased concentration of β-carotene and vitamin A in plasma when β-carotene was added to the diet at the level of 150,000 IU VA/(d·cow)(P0.05).From 1 to 3 month of postparturiency,the incidence of retained placenta,hysteritis and mastitis was significantly decreased due to the addition of β-carotene to the diet of cows.Supplementation of β-carotene resulted in an increased milk production,increased concentration of β-carotene and vitamin A in plasma,increased concentration of β-carotene in milk,decreased incidence of retained placenta,hysteritis and mastitis." @default.
- W2347720231 created "2016-06-24" @default.
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- W2347720231 date "2007-01-01" @default.
- W2347720231 modified "2023-09-24" @default.
- W2347720231 title "Effect of β-Carotene on Performance of Dairy Cow in Perinato Period" @default.
- W2347720231 hasPublicationYear "2007" @default.
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