Report on a breeding objective that may reduce the carbon footprint of extensive cow-calf production systems
نویسندگان
چکیده
منابع مشابه
Forage systems for cow-calf production in the Appalachian region.
Small cow-calf operations are common in the Appalachian region. Tall fescue [Lolium arundinaceum (Schreb.) S. J. Darbyshire] is the dominant forage in these systems for direct grazing as well as for stockpiling. The present study was conducted from 2001 to 2005. A total of 108 Angus and Angus crossbred cows were allotted randomly to 6 forage systems and then to 3 replicates within each system. ...
متن کاملCarbon flux assessment in cow-calf grazing systems.
Greenhouse gas (GHG) fluxes and soil organic carbon (SOC) accumulation in grassland ecosystems are intimately linked to grazing management. This study assessed the carbon equivalent flux (Ceq) from 1) an irrigated, heavily stocked, low-density grazing system, 2) a nonirrigated, lightly stocked, high-density grazing system, and 3) a grazing-exclusion pasture site on the basis of the GHG emission...
متن کاملEffects of breeding date, weaning date, and grazing season length on profitability of cow-calf production systems in southeastern Montana.
Production data from 11 southeastern Montana ranches were used to parameterize a bio-economic computer model of cow/calf range production. Effects of changes in breeding date, weaning date, and range removal date on system performance for a ranch with a fixed forage resource base (3,060 animal unit months of range forage and 744 t of hay) were simulated. Input costs were locally established in ...
متن کاملEstimation of maternal variance components considering cow-calf contacts under extensive pastoral systems.
Traditional methods of variance component estimation for traits under maternal influence consist of partitioning the variance into direct additive genetic, maternal additive genetic, permanent maternal environmental, and error variance components. This partitioning is based on the assumption that each calf is nurtured and fed exclusively by its own dam. However, under extensive pastoral systems...
متن کاملUsing multiple objective programming in a dairy cow breeding program.
Multiple-objective programming was used to examine the effects various objectives had on the optimal portfolio of sires chosen for a given breeding problem in a Jersey cow dairy herd. It was assumed that the dairy producer had the following three objectives in the breeding decision: to maximize Net Merit, to minimize inbreeding, and to minimize total expenditure on semen. Integer programming mo...
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ژورنال
عنوان ژورنال: Natural Science
سال: 2013
ISSN: 2150-4091,2150-4105
DOI: 10.4236/ns.2013.51a026