In this study the values of true digestibility of DM, OM, CP, NDF and starch determined either by the nylon capsule method or conventional in vivo method were compared. Four intact crossbred dairy cows (mean milk yield 21.9 kg/d) were used in two experimental periods. TMR consisted of maize silage, lucerne hay and concentrate. Nylon capsules (external diameter 10 mm) were made of nylon cloth (p...

The objective of this study was to determine whether patterns of LH secretion are acutely or chronically affected by the presence of mature bulls in postpartum first-calf suckled beef cows exposed to bulls either continuously or intermittently beginning on d 30 after birth. Crossbred cows were assigned randomly to be either continuously exposed to (BE; n = 20) or isolated from bulls (NE; n = 32...

This study aimed to evaluate the physiological response of female beef cattle peatland microclimate stress in Central Kalimantan. used direct observation on small holder farm. Microclimate data 41 units barns and parameters were collected morning, at noon afternoon. The parameter measurements involved 215 cattle, consisting 119 Bali 96 crossbred with different stages including pregnant cows, la...

This study was conducted among 18 lactating crossbred cows that had clinical lameness associated with painful sole lesions. Claw dimensions were recorded using standard techniques from affected claws in selected animals before functional hoof trimming and compared values. A significant (p < 0.01) increase the toe height claw diagonal of observed when to Toe angle heel significantly lower No ...

Five experiments evaluated the effects of rumen-protected PUFA supplementation on reproductive function of Bos indicus beef cows. In Exp. 1, 910 lactating primiparous Nelore cows were randomly assigned to receive 0.4 kg/d of a protein-mineral mix in addition to 0.1 kg/d of a rumen-inert PUFA source (PF) or 0.1 kg/d of kaolin (rumen-inert indigestible substance; control), from the beginning of e...

Spring-calving, crossbred (1/4 to 3/8 Brahman) primiparous (n = 56) and multiparous (n = 102) beef cows were used to evaluate the effects of progesterone, delivered via a controlled internal drug-releasing (CIDR) device, and prostaglandin F(2alpha) (PGF(2alpha)) on estrous behavior, synchronization rate, initiation of estrous cycles, and pregnancy rate during a 2-yr period. To determine luteal ...

Background and Objective: Ineffective estrus detection is the foremost limiting factor in the fertility of farmed cattle worldwide. Therefore, this study investigates the effect of three synchronization protocols with Fixed Time Artificial Insemination (FTAI) on the pregnancy rate of crossbred dairy cows. Methodology: Ninety one cows were assigned to four groups where the Body Condition Score (...

Abstract An estrous-detection patch was used to determine the optimum timing for STAI and necessity of GnRH at on a 7-day CO-Synch+CIDR protocol. Crossbred beef cows (n=216) were stratified into following treatment groups: CTRL=TAI (n=67) 72 h post CIDR removal, or TRT=STAI (n=149) 84 removal. All females received (100 mcg) plus d0, PGF2α, an Estrotect estrous-detector d7. At post-CIDR score as...

Crossbred, multiparous beef cows (n = 178 in Year 1; n = 148 in Year 2) were used to evaluate the effects of Cu, Zn, and Mn supplementation and source on reproduction, mineral status, and performance in grazing cattle in eastern Colorado over a 2-yr period. Cows were stratified by expected calving date, age, BW, BCS, and liver mineral status and assigned to the following treatments: 1) control ...

A 2-yr study using primiparous and multiparous, spring-calving, crossbred beef cows was conducted to evaluate the effects of supplemental whole corn germ on reproductive performance, calf performance, and serum leptin concentrations. Each year, cows were blocked by age and BCS and assigned randomly to one of three treatments: PRE (n = 115) cows received 1.14 kg/d (DM basis) of whole corn germ f...