«milk yield»
۶۸۲۷ نتیجهgenetic analysis of milk yield and open days traits of holstein dairy cattle in iran for first five lactation
a data file containing 607662 (317608) milk (open days) records belonging 294417 (177838) holstein cows that were calved from 1983 to 2008 was used. the bivariate repeatability model was used for data analyzing so that herd, calving year, calving month, days in milk (only for mil
the effect of varying levels of metabolizable protein on milk yield and on blood metabolites in holstein cows
the aim followed in the present study was to investigate the effects of different metabolizable protein (mp) levels on holstein cows, milk yield and composition, and as well on concentration of plasma metabolites in the cow,s early lactation. twenty - four holstein cows(bw 580±23
Milk yield depression and its economic loss due to production diseases: Iran’s large dairy herds
Background: Incidences of production and metabolic diseases in dairy cows have increased over the last few decades because of the increasing trends in milk production. Production diseases cause different and distinct depressions in milk production that lead to different and major
Effects of Supplementing Borana Dairy Cows with Local (Vachelliatortilis pods) and Conventional Feeds on Milk Yield and Milk Composition
An experiment was conducted at Yabello Pastoral and Dryland Agricultural Research Center in Oromia National Regional State to evaluate the effects of local and conventional feed supplementation on milk yield and milk composition of Borana cows. Twelve lactating Borana cows of fir
association of milk yield and body condition score indices with the commencement of luteal activity after parturition in high producing dairy cows
the aim of the present study was to investigate the relation between different indices of milk yield andbody condition score (bcs) with the commencement of the luteal activity (c-la) during the postpartumperiod in high producing dairy cows. seventy-one multiparous healthy (free o
Association of milk yield and body condition score indices with the commencement of luteal activity after parturition in high producing dairy cows
The aim of the present study was to investigate the relation between different indices of milk yield andbody condition score (BCS) with the commencement of the luteal activity (C-LA) during the postpartumperiod in high producing dairy cows. Seventy-one multiparous healthy (free o
Usability of the Factor Analysis Scores in Multiple Linear Regression Analyses for the Prediction of Daily Milk Yield in Norduz Goats
The aim of this study was to determine the relationship between daily milk yield and udder traits using multiple regression analyses in order to predict daily milk yield in Norduz goats. 10 udder traits including upper udder height, bottom udder height, udder depth, udder width,
An Optimum Regression Model to Estimate Economic Values for Milk Yield, Milk Yield Persistency and Calving Interval in Dairy Cattle
Emphasis on milk yield (MY) as well as milk yield persistency (MYP) and calving interval (CI) is necessary to achieve more sustainable productionin dairy cattle. Therefore the main objective of this study was to find an optimum regression model to estimate economic values for MY,
an optimum regression model to estimate economic values for milk yield, milk yield persistency and calving interval in dairy cattle
emphasis on milk yield (my) as well as milk yield persistency (myp) and calving interval (ci) is necessary to achieve more sustainable productionin dairy cattle. therefore the main objective of this study was to find an optimum regression model to estimate economic values for my,
Relationship between polymorphisms of growth hormone gene with milk yield and its components in Iraqi cattle bred of Janoubi, Cross and Holstein
This study aimed to identify the polymorphic SNPs of the growth hormone gene and their association with milk yield and its chemical components. A total of 24 cows were collected from local cattle belonging to Janoubi, cross, and Holstein breeds (8 cows each). Blood and milk sampl