TY - JOUR
T1 - The association of ruminal pH and some metabolic parameters with conception rate at first artificial insemination in Thai dairy cows
AU - Inchaisri, C.
AU - Somchai Chantsavang, null
AU - Noordhuizen, J.P.T.M.
AU - Hogeveen, H.
PY - 2013
Y1 - 2013
N2 - The objective of this study was to determine the
association of metabolic parameters and cow associated factors
with the conception rate at first insemination (FCR) in
Thai dairy cows. The investigation was performed with 529
lactations from 32 smallholder dairy farms. At 3–6 weeks after
parturition, blood samples and ruminal fluid were collected.
Body condition scores (BCS) of cows were scored 1 week
before expected calving date and at blood sampling date.
Ruminal pH was measured at 2–4 h after morning feeding in
ruminal fluid collected by ruminocentesis. Serum betahydroxybutyrate
and serum urea nitrogen were measured by
kinetic enzyme method. Cows with first insemination (AI)
between 41 and 114 days postpartum were identified after
pregnancy diagnosis for FCR. Breed, parity, interval from
calving to first AI, BCS before calving, BCS after calving,
loss in BCS after calving, SBHB, SUN, ruminal pH, and
postpartum problems were selected as independent variables
for a model with FCR as a dependent variable. A multivariable
logistic regression model was used with farm as a random
effect. Overall FCR was 27.2 %. The FCR depended on
interval from calving to first AI, BCS before calving, and
ruminal pH. The FCR between 69 and 91 days postpartum
was significantly highest (45 %). Before calving, a cow with
high BCS (=3.5) had significantly greater FCR than a cow
with low BCS (=3.25; P
AB - The objective of this study was to determine the
association of metabolic parameters and cow associated factors
with the conception rate at first insemination (FCR) in
Thai dairy cows. The investigation was performed with 529
lactations from 32 smallholder dairy farms. At 3–6 weeks after
parturition, blood samples and ruminal fluid were collected.
Body condition scores (BCS) of cows were scored 1 week
before expected calving date and at blood sampling date.
Ruminal pH was measured at 2–4 h after morning feeding in
ruminal fluid collected by ruminocentesis. Serum betahydroxybutyrate
and serum urea nitrogen were measured by
kinetic enzyme method. Cows with first insemination (AI)
between 41 and 114 days postpartum were identified after
pregnancy diagnosis for FCR. Breed, parity, interval from
calving to first AI, BCS before calving, BCS after calving,
loss in BCS after calving, SBHB, SUN, ruminal pH, and
postpartum problems were selected as independent variables
for a model with FCR as a dependent variable. A multivariable
logistic regression model was used with farm as a random
effect. Overall FCR was 27.2 %. The FCR depended on
interval from calving to first AI, BCS before calving, and
ruminal pH. The FCR between 69 and 91 days postpartum
was significantly highest (45 %). Before calving, a cow with
high BCS (=3.5) had significantly greater FCR than a cow
with low BCS (=3.25; P
KW - body condition score
KW - milk-production
KW - holstein cows
KW - acidosis
KW - fertility
KW - herds
KW - cattle
KW - yield
KW - ovulation
KW - lipopolysaccharide
U2 - 10.1007/s11250-012-0344-5
DO - 10.1007/s11250-012-0344-5
M3 - Article
SN - 0049-4747
VL - 45
SP - 1183
EP - 1190
JO - Tropical Animal Health and Production
JF - Tropical Animal Health and Production
IS - 5
ER -
