Economic efficiency of Bulgarian dairy synthetic population and Assaf sheep breeds

K. Stankov*
Department of Management, Faculty of Economics, Trakia University, 6000 Stara Zagora, Bulgaria (Manuscript received 1 December 2019; accepted for publication 28 February 2020)

Abstract. The economic efficiency of ewes from the Bulgarian dairy synthetic population (BDSP) and Assaf sheep breeds, reared in three production systems, e.g. grazing on pasture, stall-pasture rearing and stall rearing was studied. The results from the study showed that BDSP ewes in the stall-pasture rearing system had a relatively low milk yield for a specialised dairy sheep breed – 80L for the lactation period. In this system, without the subsidy, the profit and cost efficiency were negative, while with subsidy, minimum positive results were achieved. For BDSP ewes reared in a stall-pasture rearing system with stall feeding during the grazing period and grazing on improved pastures, the obtained milk yield was by 33% higher. The subsidy resulted in satisfactory profit and cost efficiency, while without the subsidy, the farm ended in loss. BDSP and Assaf ewes reared in stalls, demonstrated substantially higher milk yield and productivity. They realised a profit and good cost efficiency. The milk yield of BSDP sheep reared in stalls was 200L per lactation, and fertility – 140%. The Assaf breed in which a high level of selection and regulated reproduction cycle was achieved, had 250L milk per lactation and 140% fertility. The profit with subsidy was 128.85 BGN (1Lev=0.975€) and without the subsidy: 48.85 BGN, with relatively high cost efficiency. An introduction of traits for higher milk yield, polyestrus and fertility from Assaf into BSDP sheep is necessary.

Еconomic efficiency of local, merino and meat-type sheep breeds raised in Bulgaria without milking

K. Stankov*
Department of Management, Faculty of Economics, Trakia University, 6000 Stara Zagora, Bulgaria (Manuscript received 1 December 2019; accepted for publication 14 February 2020)

Abstract. The goal of the present study is to perform an economic assessment of the local (autochthonic), merino and meat-type sheep breeds raised in Bulgaria without milking and under the conditions of a market economy and free commerce. We studied sheep from three herds, of the Srednostaroplaninska breed, Northeast Bulgarian Merino breed (NEBM) and the Île-de-France breed. The sheep from all three herds were under selection control. The results of the study indicated low economic effects for all three herds. Without subsidies, the local and merino breeds finished with negative values for profits and cost-efficiency of the income and expenses, and zero for the meat-types. The subsidy for the sheep of the Srednostaroplaninska breed made up 37.9% of the income, whereas the sold lambs and sheep culled for meat made up 60.7%. This indicated that the local mountain sheep cannot provide the necessary income for a farm’s normal function without milking and without subsidies, under the present market situation. The efforts in this field should be directed towards organic production of meat and dairy products and a closed production cycle. The income from sold lambs and sheep culled for meat from the NEBM breed made up 66.8% of the total income, whereas wool accounted for merely 4.6%. The subsidy provided 28.5% of the farm’s funds. Accomplishing an economic effect in merino breeds is possible only if prices for buying off wool were normalized, and the fertility of the ewes was increased. For the meat-type sheep of the Île-de-France breed, the income from selling meat and breeder lambs, as well as sold culled sheep made up 75.6%, and the subsidy – 22.7%. A higher economic effect for this breed could be achieved through selection towards fertility and more frequent births, i.e. 3 litters in 2 years. A significant productive and economic effect in the meat-type breeds could be achieved from ram breeding and conducting industrial crossbreeding in the stock part of the breeds.

Production efficiency of three fattening systems for black and White male calves

R. Otuzbirov, R. Kalev, Zh. Gergovska

Two group production experiments were carried out with a total number of 24 Black and White male calves. The animals were divided in three groups with 8 calves in each depending on the housing and feeding conditions: free indoor housing in box (group І), housing in tie stalls (group ІІІ) and a combination of a grazing period with an free indoor housing in box period (group II). The following economic traits were recorded: sales price of calves, costs of used feeds, labor costs, other costs, income from sold fattened calves. On this basis, the cost price and profit for 1 kg weight gain and 1 kg live weight were calculated. Fattening calves indoor in tie stalls resulted in the highest average daily weight gain and attainment of slaughter weight within the shortest period. This fattening system has however generated the highest costs – mainly for feed and was consequently related to the highest cost price per kg weight gain. The lowest weight gain was observed in combined pasture-rearing and indoor finishing, which reflected in prolonged total duration of fattening. At the same time, this system was characterized with low feed costs, hence the lowest cost price per 1 kg weight gain and live weight and respectively, with the highest profit.

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