Simulation Model for a Nomadic Animal Production System in Southern Iran
محورهای موضوعی : Relationship between Animal and RangelandGh. R. Badjian 1 , Dahlan Ismail 2 , M. Sh. Othman 3 , A.A. Mehrabi 4
1 - Research Center for Agriculture and Natural Resources Fars province
2 - Department of Animal Science, Faculty of Agriculture, University Putra Malaysia, 43400 UPM Serdang,
Selangor,
3 - Rainforest Academy, University Putra Malaysia, 43400 UPM Serdang, Selangor
4 - Faculty of Natural Resources, University of Teheran, Karaj
کلید واژه: Simulation, Nutritional Management, Nomadic, and Southern Iran, model, Sustainable Livestock Production System,
چکیده مقاله :
The first motive for the determination and evaluation of an energy productionsystem is the need to change. Such system is dynamic in nature and is influenced bymany factors such as age and physiological status of individual sheep or goat, quantityand quality of available feed and environment including the management systems.Traditional pastoral resource assessments do not always account for the complex,interrelated nature of land, forage and livestock. Modeling may overcome the limitationsof traditional methods by improving the understanding of complex pastoral systems, andmakes fast repetitive analyses, spanning time, incorporating variability and representingmore realistically complex interactions possible within the system. The estimated valuesof metabolisable energy for maintenance and production in this study are based on theresults of two feeding systems linked together by grazing the energy intake in theNomadic Production System (NPS) and the dynamic system modeling used to study theassessment of these complex systems. In this study, validation of model relied on theobservations of Torki Ghashghaii (TG) sheep (like those in Bakkan) under pen-fed andintegrated rangeland-cropland feeding systems, and was carried out mainly by studyingthe body weight gain of growing animals and also body weight changes of ewes due topregnancy and lactation. After validation, the study indicated that the mean value ofactual data of male and female lambs (weaners) and ewes were in close agreement withthe simulated data. These results validate the generalized structure of energy utilizationmodels of grazing sheep under production sub- systems of NPS. These results will enablethe prediction of carrying capacities in any given situation under conditions similar tothose in Bakkan.
Abbott, K. A. and Maxwell W. M. C.
2002. Sheep Health & Production.
University of Sydney. Cited 03 May
2004, Available from:
http://vein.library.usyd.edu.au
Badjian, G. R. 2005. Impact of Nomadic
settlement on the ecology of Rangeland
and Livestock in the Bakkan region of
Southern Iran. Ph.D. Thesis, University
Putra Malaysia.
Dahlan I. Shahar, M. Z. Yamada Y. &
Mahyuddin M. D. 1991. The
application of Modeling and Expert
System for Livestock-Crop Integration.
In: Recent Advances on the Nutrition
of Herbivores, MSAD 1991. pp 253-
267.
Eilami Bahman. 1999. Recognition of
Torki Ghashghaii sheep in Fars
province. Fars research center for
natural resources and animal affairs.
Iran (in Persian).
Emadi, M. H. 1995. Pastoralists,
Participation and Policy: an action
oriented, systemic and participatory
approach to improve the relationships
between Pastoralist Nomads,
government and natural resources in
Iran. Ph.D. Thesis, University of
Western Sydney, Hawkesbury,
Australia. pp 354.
Ministry of Agriculture, Fisheries, and
Food (MAFF). 1975. Energy allowance
and feeding systems for ruminants.
Technical Bull. No.33. pp 79.
