Short-term and long-term grazing capacity of Taft southwestern rangelands, Yazd

Document Type : Scientific Letters

Authors

1 Research Division of Natural Resources, Chaharmahal and Bakhtiari Agricultural and Natural Resources Researchand Education Center, Agricultural Research Education and Extension Organization ,AREEO, Shahrekord, Iran,

2 Professor, Faculty of Natural Resources, University of Tehran, Karaj, Iran

3 Associate Prof., Research Institute of Forests and Rangelands, Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran

Abstract

For the proper use of rangelands, the correct calculation of grazing capacity is one of the main goals of rangeland management. In this study, the short-term and long-term grazing capacity of Taft southwestern rangelands were calculated and compared with the common method of determining grazing capacity in rangeland projects. For this purpose, four habitats were selected in the southwest of Taft, and while measuring the forage production, other factors influencing the grazing capacity such as forage quality and their class of palatability, the allowable use of habitats, and the daily metabolic energy needs of the predominant grazing livestock were measured. The results showed that the grazing capacity calculated in the common method (1816 animal units) was more than the short-term (1367 animal units) and long-term grazing capacity (1030 animal units). This difference is due to the lack of attention to the factors influencing the calculation of grazing capacity in rangeland projects. This has led to overgrazing and eventually destruction of rangelands. Therefore, to calculate the grazing capacity, besides forage quantity, it is better to consider the forage quality and the metabolic energy requirement equivalent to the grazing livestock unit in rangelands. Instead of measuring production in one year, it is recommended that long-term rangeland production be the basis for calculating grazing capacity to maintain livestock and rangeland balance and prevent forage loss in wet years or overgrazing in droughts.
 

References

11)     Arzani, H. 1994. Some aspects of estimating short term and long term rangeland carrying capacity in the western division of New South Wales. Ph.D. Thesis, University of New South wales, Australia, 379p.
12)       Andrews, M.H. 1988. Grazing impact in relation to livestock watering points. Trends in Ecology and Evolution 3: 336–339
13)       Diaz-Solis, H., Kothmann, M.M., Grant, W.E. and De Luna-Villarreal, R. 2006. Application of a simple ecological susta`inability simulator (SESS) as a management tool in the semi-arid rangelands of Northeastern Mexico. Agricultural Systems, 88: 514–527.
14)   Ebrahimi, A., Milotic, T. & Hoffmann, M. (2010). A herbivore grazing capacity model accounting for spatio-temporal environmental variation: A too for a more sustainable nature conservation and rangeland management, Ecological Modelling, 221:900-910.
15)  Holechek, J. L. , R. D. Pieper , and C. H. Herbel , 2004. Range management: principles and practices. 5th ed. Upper Saddle River, NJ: Prentice-Hall. Inc.607p
16)   MAFF,Ministry of Agriculture Fisheris and Food (1984). Energy allowances and feeding system for ruminants,ADAS reference book,433.Hmso, London,98pp.
17)   Richardson, F.D., 2004. Simulation Models Of Rangelands Production Systems (Simple And Complex), Ph.D. thesis in applied mathematices, University of Cape Town, South Africa
18)   Sangeda,A.,Z.,Maleko.D.D.2018. Rangeland condition and livestock carrying capacity under the traditional rotational grazing system in northern Tanzania, Livestock Reserch for Rural Development,30((5):300-305
19)   Stoddart, L.A., smith, A.D. and Box, T.W. 1975. Range Management 3rd edi, McGraw- Hill Book Company, New York, USA.
20)   Vallentine, J.F., 2001. Grazing Management, second edition. Academic Press, San Diego. 535p
21)   Walker, B.H., and Janssen, M.A. 2002. Rangelands, Pastoralists, and governments- Interlinked systems of people and nature. Philosophical Transactions of the Royal Society, B 357, 719-725.
Iran Nature
Volume 5, Issue 4 - Serial Number 23
September and October 2020
Pages 71-81

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