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Information Journal Paper

Title

Determining the efficiency and effective factors on the optimal herd life in Ardabil dairy farms using data envelopment analysis (DEA) model and dynamic programming

Pages

  79-94

Abstract

 Background and objectives: One of the safe ways to increase income and profit is to pay attention to the longevity of dairy cows as well as to increase the Efficiency in each livestock units. Since livestock production enterprises are often in a competitive position by input-output market, increase of Efficiency is considered as one of the most reliable ways to increase revenue and profitability in each livestock unit. This study aims to determine the Efficiency and factors affecting the Optimal herd life using Data envelopment analysis (DEA) model and Dynamic programming in Ardabil city, Iran. Materials and methods: The data of this study was collected from Ardabil dairy farms from March 2018 to March 2019. The economic system of dairy cow herd was divided into income and cost components using system analysis method each which was decomposed to some other subsections. Then, a bio-economic model was simulated using mathematical models and optimization was performed using the Compecon toolbox of Matlab software. Dairy cattle were described through state variables including lactation period, the capacity of milk production, and different states at conception time. To design the Data envelopment analysis model, several inputs and outputs were studied in the production process. The main variables used in the current study included herd size (number of cows), food and concentrate (Kg), manpower (individuals per day), health issues (number of excretion per day), production of milk and fertilizer (Kg), and total different incomes. For analyzing the calculations of Efficiency, Deap 2. 1 software was used which is based on minimization of input per unit of production. Results: The Optimal herd life (from the first parturition to the removal time) under the specified optimal conditions was 4. 55 years. The results showed that the technical Efficiency was 0. 719 and 0. 899 with constant and variable return to scale, respectively while the scale Efficiency was calculated as 0. 788. In general, the values of technical, allocative and economic efficiencies were 0. 99, 0. 583 and 0. 579, respectively. The results of Data envelopment analysis showed that in the variable return to scale conditions, increase in herd size and health costs as well as decrease in the amount of food, concentrate and manpower costs improves the Efficiency of inefficient herds by 14. 18%, 0. 83%, 2. 8%, and 5%, respectively while the production level is kept at the same level. Conclusion: The effect of changes in heifer price, milk and discount rate on Optimal herd life showed that the percentage of livestock removal from the herd is decreased and the Optimal herd life of cattle is increased with the increase in heifer price and discount rate as well as decrease in milk price. To increase the Efficiency of an inefficient dairy breeding unit, changes can be applied in the inputs and outputs of the unit and a suitable strategy can be designed to increase the Efficiency of herd through determining the differences appeared between efficient and inefficient units.

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    APA: Copy

    SEYED SHARIFI, R., Rashtbari, Z., HEDAYAT EVRIGH, N., Abdpour, A., & SEIF DAVATI, J.. (2020). Determining the efficiency and effective factors on the optimal herd life in Ardabil dairy farms using data envelopment analysis (DEA) model and dynamic programming. JOURNAL OF RUMINANT RESEARCH, 8(3 ), 79-94. SID. https://sid.ir/paper/963594/en

    Vancouver: Copy

    SEYED SHARIFI R., Rashtbari Z., HEDAYAT EVRIGH N., Abdpour A., SEIF DAVATI J.. Determining the efficiency and effective factors on the optimal herd life in Ardabil dairy farms using data envelopment analysis (DEA) model and dynamic programming. JOURNAL OF RUMINANT RESEARCH[Internet]. 2020;8(3 ):79-94. Available from: https://sid.ir/paper/963594/en

    IEEE: Copy

    R. SEYED SHARIFI, Z. Rashtbari, N. HEDAYAT EVRIGH, A. Abdpour, and J. SEIF DAVATI, “Determining the efficiency and effective factors on the optimal herd life in Ardabil dairy farms using data envelopment analysis (DEA) model and dynamic programming,” JOURNAL OF RUMINANT RESEARCH, vol. 8, no. 3 , pp. 79–94, 2020, [Online]. Available: https://sid.ir/paper/963594/en

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