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The change of dry matter intake, milk yield and bone turnover in primiparous cows compared to multiparous cows during early lactation
Author(s) -
IWAMA Yuko,
KAMIYA Mitsuru,
TANAKA Masahito,
SHIOYA Shigeru
Publication year - 2004
Publication title -
animal science journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.606
H-Index - 38
eISSN - 1740-0929
pISSN - 1344-3941
DOI - 10.1111/j.1740-0929.2004.00178.x
Subject(s) - lactation , dry matter , zoology , deoxypyridinoline , bone resorption , endocrinology , medicine , chemistry , osteocalcin , pregnancy , biology , alkaline phosphatase , biochemistry , genetics , enzyme
Data from six primiparous and nine multiparous Holstein cows were used to clarify the difference of Ca and P mobilization between primiparous and multiparous cows during early lactation. The dry matter intake (DMI) of primiparous cows was lower ( P < 0.01) than those of multiparous cows. Milk yield was lower in primiparous cows at 7, 14, 21 ( P < 0.01), and 28 days ( P < 0.05) after parturition. There was no significant difference in milk Ca and P concentrations between primiparous and multiparous cows. There were no significant differences in plasma Ca and P concentrations between primiparous and multiparous cows. The plasma P level at 7 days postpartum in primiparous cows was lower ( P < 0.05) than 28 days postpartum. The concentration of plasma osteocalcin (OC) measured as bone formation marker of primiparous cows was significantly higher than multiparous cows ( P < 0.01) at 21 and 28 days postpartum. The urinary deoxypyridinoline (DPD) as bone resorption marker of primiparous cows tended to be higher ( P < 0.10) than multiparous cows at 21 days after parturition and decreased to the same level as that of multiparae toward the peak lactation. These results show that Ca and P mobilization of primiparous cows are more active than multiparous cows.