Investigating the Rate of Removal and Replacement and Maintenance Value of RPO in Dairy cattle

امیری, صونا and سیدشریفی, رضا and هدایت ایوریق, نعمت and سیف دواتی, جمال and یلچی, طاهر and غفاری چنذانق, الناز Investigating the Rate of Removal and Replacement and Maintenance Value of RPO in Dairy cattle. In: 2nd International and 6th National Iranian Congress on Organic vs. Conventional Agriculture, August 2019, Ardabil, Iran.

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Abstract

The aim of this research is to study the rate of removal and replacement of dairy cattle in the herd, so that livestock farmers can increase their dairy farm income with the help of experts and control of these factors. In this research, Relention Pay-off was carried out by implementing optimal policies using dynamic programming based on computer programming and Dairy VIP software. In order to achieve this objective, livestock was selected based on the traits studied, including the shape of the lactation curve, Risk of forced exclusion, milk production, early age, calving interval, daily weight gain before and after milking Pregnancy status was categorized in different periods of lactation and postpartum months. Subsequently, by introducing biological parameters and economic value of each trait, including milk, calf, nutrition and management costs, slaughter and carcass value, alternative heifer cost, pregnancy probability, optional and optional withdrawal in a developmental economic model The result was simulated in Dairy VIP software, the flock condition was simulated in different conditions. Initially, using a series of raw data of one of the Ardabil industrial dairies, which was collected between 1394 and 1397, the decision was made to optimally minimize the cost. Lost opportunity (the cost of rejecting the best alternatives when making a decision), so Which resulted in the loss of the value of keeping the livestock, which derives from the difference in the current net worth of existing livestock and heifers. Alternatively, it is expected that the use of these methods and appropriate management decisions is expected to generate annual profits. Maximized.

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