evaluating economic losses associated with delayed conception in dairy cows
نویسندگان
چکیده
the objective of this study was to consider economic consequence of delayed conception of milking cows in large dairy farms in iran. optimum open days and milk production at peak were assumed to be 110 days and 45 kg respectively. price of milk, feed, semen and hormones were calculated based on average prices of autumn, 2013. results of this study showed that increasing days in milk (dim) from 110 to 170 has doubled costs of sperm and veterinary hormones. delaying of each day of conception in cows with 45 kg of milk production at peak, during first; second, third and fourth estrous cycle beyond the optimum days open (110 d) cause economic losses of 308503, 572818, 812689 and 1013331 rials, respectively. feed costs compromise 54.7 to 56.6 percent of the loss, and any one percent change in feed price will directly cause 0.55 percent changes of the loss.
منابع مشابه
Comparative cervical cytology and conception rate in postpartum dairy cows
During the early postpartum period, multiple bacterial species invade the uterus of cows. Phagocytosis by polymorphonuclear cells is a primary mechanism involved in the elimination of bacteria and improvement of conception rate. Therefore, a relationship could exist between endometrial cytology and conception rate of postpartum dairy cows. In this study 50 postpartum healthy Holstein Frisian da...
متن کاملRisk factors for delayed conception in Korean dairy herds
Delayed conception is defined as an interval of greater than 90 days postpartum before a cow becomes pregnant again. In this study, the risk factors for delayed conception in Korean dairy herds were determined by evaluating several reproductive factors in individual cows. The following data was recorded from 1,012 pregnancies in eight dairy herds (designated A-H) from July 2001 to June 2006: he...
متن کاملSelection of Dairy Cows for Economic Merit
Selection of dairy cows for economie merit requires the use of a model for genetic merit that involves the cross-product of the genetic values for milk and milk fa t percentage. A linear and a quadratic index are described as procedures for selection of cows, the linear index being blp.~ + bzp, and the quadratic index being blp,~ + b~_pt + b~p,n 2 + b~p, ~ + b~p.,pt where p~ and pt are the phen...
متن کاملDairy Cows Economic Production and Environmental Protection
Jacqueline S. Rowarth Waikato Management School, The University of Waikato, Private Bag 3105, Hamilton 3240 ABSTRACT: New Zealand’s history of settlement and economic development has been tied to dairy production. Over the last two decades, a tipping point of public understanding has been reached, and increasing research has been directed towards understanding the economic impact of the dairy i...
متن کاملestimation of economic values and financial losses associated with dystocia for holstein dairy cattle of iran
the financial losses, absolute and net economic values (evs) for direct (dcd) and maternal calving difficulty (mcd) were estimated using a bioeconomic model and taking into account the categorical nature of the trait. the effects of dystocia on other traits were estimated. but because of low reliability they were not considered for calculations in the base situation. in the base situation, the ...
متن کاملHerd-level economic losses associated with Johne's disease on US dairy operations.
Johne's disease ('paratuberculosis') is a chronic, infectious, wasting disease that affects dairy cattle. Estimation of its impact on herd productivity and corresponding economic loss on US dairy operations was part of the USDA National Animal Health Monitoring System's (NAHMS) 1996 national dairy study. Johne's-positive herds experience an economic loss of almost US$ 100 per cow when compared ...
متن کاملمنابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
علوم دامی ایرانجلد ۴۶، شماره ۲، صفحات ۱۵۱-۱۵۸
کلمات کلیدی
میزبانی شده توسط پلتفرم ابری doprax.com
copyright © 2015-2023