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Effects of dietary protein level on growth performance and nitrogen excretion of dairy heifers
Heifers Growth Performance Protein Nitrogen Excretion
2017/3/9
Protein supplementation is costly and can result in excess nitrogen (N) excretion. The objective of this study was to evaluate the effects of feeding different levels of dietary protein on average dai...
Effect of insemination-related factors on pregnancy rate using sexed semen in Holstein heifers
Holstein sex-sorted semen estrus sperm quality intracornual insemination fertility
2016/12/20
The objectives were to determine the effects of insemination with sexed semen at spontaneous and induced estrus, fixed-time insemination at synchronized estrus, the deposition site, estrous intensity,...
Effects of Different Cutting Height on Nutritional Quality of Whole Crop Barley Silage and Feed Value on Hanwoo Heifers
Aerobic Stability Barley Silage Cutting Height Digestibility Hanwoo Heifer
2016/11/10
The present study evaluated the effects of different cutting height on nutritive value, fermentation quality, in vitro and in vivo digestibility of whole crop barley silage. Whole crop barley forage (...
A high incidence of leukocyte chimerism (60,XX/60,XY) in single born heifers culled due to underdevelopment of internal reproductive tracts
cattle disorders of sex development freemartinism
2015/7/2
Freemartinism, a primary disorder of sex development (DSD) in cattle, is associated with leukocyte chimerism (60,XX/60,XY). The diagnosis of DSD is easy if it is known that a heifer with abnormally de...
Fattening heifers on continuous pasture in mountainous regions–implications for productivity and meat quality
beef cattle Alpine pasture daily gain product quality fatty acid
2015/6/24
Economical and ecological issues as well as consumer demand for sustainably produced agricultural food rise the trends to fatten beef cattle on pasture during the grazing season. However, particularly...
Growth performance, carcass traits and meat quality of bulls and heifers slaughtered at different ages
meat quality Growth performance
2015/6/23
Older animals were generally fatter and their carcasses contained lower proportions of high-priced meat (P <
0.01) and bones (P < 0.05). Bulls exhibited lower contents of dry matter (P < 0...
Superovulation following follicular synchronization with GnRH at random stages of the oestrous cycle in heifers
oestrous cycle GnRH superstimulation follicular puncture heifer
2015/6/9
The objective of this study was to develop a superovulatory program based on synchronization of follicular waves with GnRH which could be applied regardless of the stage of the oestrous cycle. 36 heif...
Superovulation following follicular synchronization with GnRH at random stages of the oestrous cycle in heifers: oocyte competence and in vitro embryo production
heifer oocyte GnRH oocyte competence
2015/6/8
The objective of this study was to develop a superovulatory program based on the synchronization of follicular waves with GnRH which could be applied regardless of the stage of the oestrous cycle. In ...
A comparison of the follicular dynamics in heifers of the Czech Fleckvieh and Holstein breeds
cattle oestrous cycle bovine ovary ovarian follicular wave repeatability
2015/6/8
Differences in follicular development and repeatability of follicular growth pattern among Czech Fleckvieh (n = 20) and Holstein (n = 23) heifers were investigated. Follicular dynamics was evaluated b...
The effect of growth and development intensity in replacement heifers on economically important traits of Holstein cattle in the Czech Republic
Heifer intensity of growth and development average daily live weight gain milk yield reproduction Holstein cattle
2015/6/4
The objective of the study was to determine the effect of growth and development intensity in Holstein replacement heifers on economically important animal traits. The intensity of growth was assessed...
Ingestive Behavior of Heifers Supplemented with Glycerin in Substitution of Corn on Brachiaria brizantha Pasture
Biodiesel Efficiency Ethology Glycerin, Ingestion
2016/5/17
The objective was to evaluate the ingestive behavior of crossbred heifers finished on a Brachiaria brizantha cv. Marandu pasture receiving four levels of glycerin in their supplementation. Thirty-six ...
Levels of Supplementation for Grazing Beef Heifers
Nutritional Parameters Protein Supplement Weight Gain
2016/5/16
The objective of this experiment was to evaluate the effect of providing different levels of a supplement on the nutritional characteristics and productive performance of heifers on pasture during the...
Nutrition-induced Changes of Growth from Birth to First Calving and Its Impact on Mammary Development and First-lactation Milk Yield in Dairy Heifers: A Review
Cattle Heifer Growth Mammary Development Milk Yield
2016/5/10
This review focuses on the nutritional effects from birth until age at first calving on growth, mammary developmental changes, and first-lactation milk yield in heifer calves. The advancement in the g...
Factors Affecting High Mortality Rates of Dairy Replacement Calves and Heifers in the Tropics and Strategies for Their Reduction
Pre-weaning Calf Mortality Tropics Small Holder Dairy Systems
2016/5/9
The tropics is not an ideal location for calf rearing as the high temperatures and humidities introduce many potential disease problems to milk fed calves. In addition, the type of dairy farming (gene...
Modeling growth of dairy cattle heifers fed elephant grass under stall-feeding system in Uganda
Models weight gain heifers elephant grass simulation
2011/1/11
A simulation model was developed to predict growth rate and days required to reach target mating weight of dairy cattle heifers in a stall-feeding system. Input parameters for the model are gross ener...