The consequences of early elimination in the dairy cattle herd

قاسمی گده کهریز, افسانه and سیدشریفی, رضا and هدایت ایوریق, نعمت and سیف دواتی, جمال and عبدی بنمار, حسین and غفاری چنذانق, الناز The consequences of early elimination in the dairy cattle herd. 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 study was to identify the factors affecting the elimination and elimination of premature beef cattle so that optimal replacement decisions could be made for the dairy cattle herd to increase the cow's annual income by controlling these factors. Considering that the most important goal of a dairy farm is to maximize the profit of the flock. One of the most important issues that affects this benefit is the criteria and the degree of exclusion. In an optimal or optimal elimination guide, livestock will be ranked based on the future deducted flow of the future, and then, given the opportunity cost of the investment, the offer to keep the livestock in the herd or substitute it is given; therefore, performance prediction Flock is one of the most important components of livestock eradication programs. Initially, using a series of raw data from one of the industrial dairies in Ardebil between 1394 and 1397, the biological parameters of the herd, including the shape of the lactation curve, the risk of mandatory and optional withdrawal and the probability of pregnancy in different lactation periods and months It was estimated after birth. Also, the herd's financial information (average of year ...) was taken in the form of an economic questionnaire from the livestock unit. Subsequently, introducing biological parameters and financial information into an ecosystem model The Dairy VIP software has been developed, the herd status has been simulated in different conditions. The case was examined under conditions. If the present value of the dairy cow in the herd is lower than a heifer, the decision is made to replace it. Otherwise, the dairy cattle will rema.

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