Determination of Allowable Use and Grazing Tolerance of Picris strigosa (Case Study: Blooman rangelands, Lorestan Province, Iran)

محورهای موضوعی : Range Management

Reza Siahmansour ¹ , Ataollah Ebrahimi ² , Reza Chamanpira ³ , Ehsan Zandiesfahan ⁴ , Parvin Ramak ⁵

1 - Research Division of Natural Resources, Lorestan Agricultural and Natural Resources Research and Education Center, AREEO, Khorramabad, Iran
2 - Department of Range and Watershed Management, Shahrekord University, Shahrekord
3 - Research Division of Natural Resources, Lorestan Agricultural and Natural Resources Research and Education Center, AREEO, Khorramabad, Iran
4 - Research Institute of Forests and Rangelands, Agricultural Research Education and Extension Organization, AREEO, Tehran, Iran
5 - Research Division of Natural Resources, Lorestan Agricultural and Natural Resources Research and Education Center, AREEO, Khorramabad, Iran

تاریخ دریافت : 1399/11/01 تاریخ پذیرش : 1400/04/21 تاریخ انتشار : 1401/04/10

کلید واژه: Grazing intensity, Forage, Growth stage, Harvest rate, <i>Picris strigosa</i>,

چکیده مقاله :

Picris strigosa is a valuable forage species in mountainous rangelands of Lorestan province, Iran, which produces suitable forage for sheep grazing. The aim of this study was to determine the allowable use and grazing tolerance of this species. For this purpose, 50 individuals of P. strigosa were selected in its typical habitat and marked for monitoring after applying four levels of harvesting intensities including control (0%), 25, 50, and 75% of the annual production during 2007–2011. Treatments were investigated by clipping and weighing method every month from May to July in vegetation period. The results showed a significant difference in terms of forage production between treatments (P≤0.01). The highest and lowest forage production with average values of 42.45g and 15.23 g per plant were obtained in 0% harvesting rate (control) and 75% intensity rate, respectively. In other words, harvesting higher than 50% coupled with early grazing (April and May, in accordance with the local pattern and research method of this article) weakens the individuals. Continuation of this process also increases the mortality of the individuals (death of 30% of the stands at a harvest intensity rate of 75%). Due to the sensitivity of the species to early grazing, it was recommended that for such a dominant species, livestock should enter the pasture in early June. Maximum forage production in control and the fast reduction in forage production of 75% treatment emphasize that overgrazing of this species would completely eliminate it from the field. It was concluded that P. strigosa is sensitive to grazing and its sensitivity should be considered in rangeland management plans.

منابع و مأخذ:

Bachelet, D., Sheehan, T., Ferschweiler, K. and Abatzoglou, J. 2017. Simulating Vegetation Change, Carbon Cycling, and Fire over the Western United States Using CMIP5 Climate Projections. Natural Hazard Uncertainty Assessment: 257-275.

Baghestani, N., Zare, M., Zandi, E., Zarekia, S. 2020. 'Effects of Intermediate-Term Grazing Rest on the Vegetation Characteristics of Steppe Rangelands', Journal of Rangeland Science, 10(1), 28-38.

De Graaff, M.-A., Throop, H. L., Verburg, P. S., Arnone,J. A. and Campos, X. 2014. A synthesis of climate and vegetation cover effects on biogeochemical cycling in shrub-dominated drylands. Ecosystems 17(5): 931-945.

Ebrahimi, A., Milotić, T., and Hoffmann, M. 2010. A herbivore specific grazing capacity model accounting for spatio-temporal environmental variation: A tool for a more sustainable nature conservation and rangeland management. Ecological Modeling 221(6): 900-910.

Eldridge, D. J., Poore, A. G., Ruiz‐Colmenero, M., Letnic M., and Soliveres, S. 2016. Ecosystem structure, function, and composition in rangelands are negatively affected by livestock grazing. Ecological Applications 26(4): 1273-1283.

Favretto, N., E, Luedeling., Stringer, L. C. and A. J. Dougill. 2017. Valuing Ecosystem Services in Semi‐arid Rangelands through Stochastic Simulation. Land Degradation & Development 28(1): 65-73.

Głowacz, K. and Niżnikowski, R. 2018. The effect of animal grazing on vegetation and soil and element cycling in nature. Environmental Science and Pollution Research 25(4): 3565-3570.

Habibian, S. M. R., Arzani. H, Javadi. S.A. And Habibian. S.H. 2010. Comparison of two methods of preference value determination of plant species for sheep in semi- steppe rangelands in Fars province. Iranian journal of range 24: 188-197.

Haidari, M., H., Jalilvand, R., Haidari, H. and Shabanian, N. 2012. Study of Plant Biodiversity in Grazed and Non-grazed Areas in the Iran-o-Turanian Ecological Zones (Case Study: Yazd Province, IRAN). Annals of Biological Research 3(11): 5019-5027.

Hofmann, K., Lamprecht, A., Pauli, H. and Illmer, P. 2016. Distribution of Prokaryotic Abundance and Microbial Nutrient Cycling Across a High-Alpine Altitudinal Gradient in the Austrian Central Alps is Affected by Vegetation, Temperature, and Soil Nutrients. Microbial ecology 72(3): 704-716.

Holzapfel, S. 1994. A revision of the genus Picris (Asteraceae, Lactuceae) sl in Australia. Willdenowia: 97-218.

Hu, X., Yin, P., Zeng S., and Tong, C. 2018. Responses of Soil Macro faunal Community and Diversity under Different Types of Vegetation on Soil Nutrient Pools in winter in Emei Mountain, China. IOP Conference Series: Earth and Environmental Science, IOP Publishing.

Jankju, M., Mellati, F. and Atashgahi, Z. 2011. Flora, life form and chorology of winter and rural range plants in the Northern Khorasan Province, Iran. Journal of Rangeland Science, 1; 269-282.

Jarso, A. 2019. 'Causes and Effects of Rangeland Degradation in the Lowland Districts of the Bale Eco-Region, Ethiopia', Journal of Rangeland Science, 9(3), 259-276.

Johnson, C. G. 2007. Rangeland exclosures of northeastern Oregon: stories they tell (1936-2004).

Keddy, P., Nielsen, K., Weiher, E. and Lawson, R. 2002. Relative competitive performance of 63 species of terrestrial herbaceous plants. Journal of Vegetation Science 13(1): 5-16.

Lack, H. W. 1979. The genus Picris (Asteraceae, Lactuceae) in Tropical Africa. Plant Systematics and Evolution 131(1-2): 35-52.

Lamman, J. S. 1994. Effects of Season and Intensity of Defoliation on Two Important Montane Riparian Species M.S. Thesis MSc. Thesis, Colorado State University, Fort. Collins, CO, USA, 118 pp.

Littler, M. M., Littler, D. S., and Taylor, P. R. 1995. Selective herbivore increases biomass of its prey: a chiton-coralline reef-building association. Ecology: 1666-1681.

Mureithi, S. M., Verdoodt, A., Njoka, J. T., Gachene, C., Van Ranst, K. 2016. Benefits derived from rehabilitating a degraded semi‐arid rangeland in communal enclosures, Kenya. Land Degradation & Development 27(8): 1853-1862.

O'connor, T. Roux, P. 1995. Vegetation changes, 1949-7. In a semi-arid, grassy dwarf shrub land in the Karoo, South Africa: influence of rainfall variability and grazing by sheep. Journal of Applied Ecology: 612-626.

Ouarab, S., Voisin, J.-F., Thevenot M., and Doumandji, S. 2009. Numbers and phenology of the Yellow-legged Gull Larus michahellis in the wetland of Réghaïa. Journal of cell and animal biology 3(12): 231-238.

Poore, J. and Nemecek, T. 2018. Reducing food’s environmental impacts through producers and consumers. Science 360(6392): 987-992.

Siahmansour, R., Ehsani, A. and Farahpoor, M. 2012. Determination of the best time of entering and leaving of livestock in Alpine rangelands in Lorestan province. Research Institute of Forests and Rangelands, Iran, Tehran. (In Persian).

Siahmansour, R., Fayaz, M. and Farahpoor, M. 2013. Study of preference value of range plants and animal grazing behaviour in key ranges of 5 bioclimatic zones of Iran (Zagheh - Lorestan). Research Institute of Forests and Rangelands, Iran, Tehran. (Persian).

Siahmansour, R., Ghasriani, F. and Farahpoor, M. 2012. Determination of Allowable Important Species in Lorestan Alpine Rangelands. Research Institute of Forests and Rangelands, Iran. Tehran. (In Persian).

Slovák, M., Šingliarová, B. and Mráz, P. 2007. Chromosome numbers and mode of reproduction in Picris hieracioides S l (Asteraceae), with notes on some other Picristaxa. Nordic Journal of Botany 25(3‐4): 238-244.

Tabares, X., Mapani, B., Blaum N., and Herzschuh, U. 2018. Composition and diversity of vegetation and pollen spectra along gradients of grazing intensity and precipitation in southern Africa. Review of Palaeobotany and Palynology 253: 88-100.

Tang, C. Q., Li, Y.-H., Zhang, Z.-Y., Hou, X., Hara, K., Tomita, M., He, L.-Y., and. Li. X.-S. 2015. Effects of management on vegetation dynamics and associated nutrient cycling in a karst area, Yunnan, SW China. Landscape and ecological engineering 11(1): 177-188.

Tasisa, B., Nemomissa, S. 2019. 'Patch Enclosure and Localized Effects of Selected Acacia Species on Herbaceous Richness and Soil Properties of Rangelands in Somali Regional State in Ethiopia', Journal of Rangeland Science, 9(4), 319-332.

Trlica, M., Buwai, M., and Menke, J. 1977. Effects of rest following defoliations on the recovery of several range species. Journal of Range Management: 21-27.

Vargas‐Luna, A. A., and Crosato Uijttewaal, W. S. 2015. Effects of vegetation on flow and sediment transport: comparative analyses and validation of predicting models. Earth Surface Processes and Landforms 40(2): 157-176.