Animal unit for small grazing animals in rangelands

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ARZANI HOSEIN; NIKKHAH ALI; MOTAMEDI JAVAD; GHORBANI MEHDI

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Journal Paper

Paper Information

Journal: Journal of Rangeland Year:2019 | Volume:13 | Issue:2 Page(s): 285-293

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Title

Animal unit for small grazing animals in rangelands

Author(s)

ARZANI HOSEIN | NIKKHAH ALI | MOTAMEDI JAVAD | GHORBANI MEHDI | Issue Writer Certificate

Keywords

Animal unitQ2

daily requirementQ2

sheep animalQ1

RangelandQ1

grazing capacityQ2

Abstract

Determination of Animal unit, is one of the essential requirements for calculating the grazing capacity. For the purpose of this study, 24 breeds of sheep, significantly dominant and well distributed across the climatic regions, were identified. Two herds were selected from available flocks in each region. Randomly, 30 livestock from each herd at different ages and sex were selected and weighed in different seasons. Using cluster analysis, and on the basis of the average adult weight of races, Animal unit size was determined. From the ratio of metabolic weight of sheep breeds to metabolic weight of livestock unit the conversion factor (equivalent of Animal units) of each breed was calculated. Then on based of puberty weight breeds were put into three separate weight groups (light, medium and heavy). The average weight of races was found to be 50 kg. Accordingly, an Animal unit for small grazing dry and non-pregnant livestock is reported as 50 kg. The conversion coefficient of 0. 7, 1 and 1. 3, were used to calculate the light, medium and heavy body size classes of animals compared to the Animal unit weight respectively. The daily requirement for an Animal unit estimated as 6. 80 MJ. using MAFF (1984) equation. A value of 30-80 percent must be added to the calculated value considering the topographic conditions, distance from water sources and animal daily orbit to/from resting area which requires more energy, in various climate conditions.

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APA: Copy

ARZANI, HOSEIN, NIKKHAH, ALI, MOTAMEDI, JAVAD, & GHORBANI, MEHDI. (2019). Animal unit for small grazing animals in rangelands. RANGELAND, 13(2 ), 285-293. SID. https://sid.ir/paper/386591/en

Vancouver: Copy

ARZANI HOSEIN, NIKKHAH ALI, MOTAMEDI JAVAD, GHORBANI MEHDI. Animal unit for small grazing animals in rangelands. RANGELAND[Internet]. 2019;13(2 ):285-293. Available from: https://sid.ir/paper/386591/en

IEEE: Copy

HOSEIN ARZANI, ALI NIKKHAH, JAVAD MOTAMEDI, and MEHDI GHORBANI, “Animal unit for small grazing animals in rangelands,” RANGELAND, vol. 13, no. 2 , pp. 285–293, 2019, [Online]. Available: https://sid.ir/paper/386591/en

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