The aim of this study was to evaluate the effects of adding sulfuric acid to sugarcane topssilage on rumen bacteria and whole rumen microorganisms (WRM) and compare the digestibility of sugarcane tops treated with different amount of urea, molasses and sulfuric acid between Holstein cow and Khouzestan buffalo. Regardless of the type of the treatment, potential of gas production (B) by cow WRM (...

The objective of this study was to measure cow response to feeding of two dietary concentrations of P, one of which was close to recent National Research Council requirements, and the other of which was well in excess of the requirement. Diets containing 0.37 or 0.57% P (dry basis) were fed to Holstein cows for the first 165 d of lactation, and occasionally longer until cows were confirmed preg...

The aim of this study was to evaluate the effects of adding sulfuric acid to sugarcane tops silage on rumen bacteria and whole rumen microorganisms (WRM) and compare the digestibility of sugarcane tops treated with different amount of urea, molasses and sulfuric acid between Holstein cow and Khouzestan buffalo. Regardless of the type of the treatment, potential of gas production (B) by cow WRM ...

The transition period for dairy cows is generally defined as the time period from three weeks prior to parturition through three weeks after parturition. It is now recognized that defining and meeting the nutritional requirements of the transition dairy cow can greatly impact animal health, production in the ensuing lactation, overall longevity, and animal well-being (NRC, 2001). Nutrition and ...

Predicted summer production losses were made for Holstein cows in three widely separated locations in the United States where field investigations of air conditioning for dairy barns have been completed. These losses, based on a functional relationship developed from Missouri Climatic Laboratory data and local climatological data, were compared to the measured losses at each location. Correlati...

Transiently increased teat wall thickness in response to machine milking has been documented by various methods, including ultrasound. However, correlative ultrasonography and histology detect the origin of this phenomenon is lacking. The first goal present study was evaluate compare milking-related changes tissue 2 breeds dairy cows (11 Simmental 3 Holstein) using B-mode ultrasonography. Addit...

a 6-year-old lactating holstein cow with a history of repeat breeding syndrome (failed to conceive afterthree artificial inseminations (ai) with fertile semen) was referred to the veterinary teaching hospital of theschool of veterinary medicine, shiraz university. according to the history, neither abnormal clinical signs,nor uterine discharge had been observed subsequent to ai. the cow had show...

Postmortem examination of a 5.5-year-old Holstein cow with history of sudden death showed a very huge spleen (120 × 45 × 10 cm) associated with severe haemoperitoneum. Histopathological findings included extensive infiltration of medium to large sized lymphocytic and lymphoblastic cells with small amounts of cytoplasm, round nuclei with coarsely granular chromatin in the spleen, and limited foc...