منابع مشابه
Relationship of early first lactation somatic cell count with risk of subsequent first clinical mastitis
The relationship between initial Somatic Cell Count (SCC) and time to first clinical mastitis was estimated from data including 20,422 Holstein heifers, without clinical signs of mastitis during the first month of lactation and with a first test day SCC lower than 400,000 cells /ml. Number of days from 35 days after first calving to first clinical mastitis event in first or second lactation was...
متن کاملGenetic Parameter Estimates for Lactation Curve Parameters, Milk Yield, Age at First Calving, Calving Interval and Somatic Cell Count in Holstein Cows
The objective of this study was to estimates the genetic and environmental components for the lactation curve parameters, milk yield, age at first calving (AFC), calving interval (CI) and somatic cell count (SCC) in Iranian Holstein cows. The dataset consisted of 210625 test day records from 25883 cows with milk yield in the first parity recorded from July 2002 to September 2007 in a total of 9...
متن کاملEffect of Total and Differential Somatic Cell Counts, Lactation Stage and Lactation Number on Lipolysis and Physicochemical Composition in Camel (Camelus dromedaries) and Cow Milk
The present study was carried out to investigate the effects of somatic cell counts (SCC), differential SCC (macrophage (MAC), lymphocyte (LYM) and polymorphonuclear leukocytes (PMN)), number and stage lactation on milk composition in camel and cow milk. Camel milk appeared to contain significantly (P
متن کاملChanges of physico-chemical characteristics, somatic cell count and curd quality during lactation and their relationships in Lacaune ewes
The aim of research was to evaluate changes of physico-chemical characteristics, somatic cell count and curd quality during lactation and their relationship in Lacaune ewes. The study was carried out on eighteen ewes of the second lactation on an organic farm in Valašská Bystřice (Czech Republic). It was found that the stage of lactation significantly affected almost all monitored traits except...
متن کاملa comparison of milk somatic cell count between industrial and traditional dairy farms in tehran province
in this study, somatic cell counts (scc) of milk were determined in six industrial and traditional dairyfarms in tehran province during different seasons. the prevalence of udder disorders and mastitis wasestimated on the base of scc as an indicator as well. in this research, industrial and traditional dairyfarms during 9 months were studied by total 32620 scc records. milk samples were collect...
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ژورنال
عنوان ژورنال: Journal of Dairy Science
سال: 1987
ISSN: 0022-0302
DOI: 10.3168/jds.s0022-0302(87)80337-5