Effects on production performance and plasma biochemical index on early lactation dairy cows of phytosterol
XIE Xinmei
HAO Haixin
HE Jianbin
Abstract：The experiment was conducted to study the effects of different dose of phytosterol on early lactation Holstein dairy cows production performance and plasma biochemical index. The 24 Holstein cows were divided into 4 groups randomly, 6 each, with similar lactation and health condition. group I was the control group fed with basal diet, II, III, IV group were added with 200, 400 and 800 mg/d of phytosterols into the basal diet, the effect of different amount of phytosterols on production performance and blood biochemical indexes on dairy cows were then performed. The re-sults showed that: ① The plasma biochemical indexes of group II changed most obvi-ously. Compared with group I, the plasma estrogen, progesterone, prolactin, follicle stimulating hormone, luteinizing hormone, interferon, interleukin 2 and high densi-ty lipoprotein cholesterol of group II were significantly increased (P<0.05) and malondialdehyde content also decreased significantly (P<0.05). Compared with group I, the plasma interleukin 2 and high density lipoprotein cholesterol of group Ⅲwere significantly increased (P<0.05). Compared with group I, the plasma triglycer-ide of group IV decreased significantly(P<0.05)and total superoxide dismutase in-creased significantly (P<0.05). The addition of phytosterols can improve milk yield of dairy cows, keep endogenous hormone imbalanced, and promote oestrus of dairy cat-tle, improve lipid metabolism of dairy cows, improve the physique, where 200 mg/d phytosterol addition amount is the most suitable amount.
Keywords：PhytosterolsDairy cowBiochemical indexesFeed additive
Publication Date：2013-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 16-22 )