Evaluation of Meteorological Factors in Estimating Forage Production in Steppe and Semi‌-steppe Rangelands of Iran

Document Type : Research and Full Length Article


1 University of Tehran

2 PhD student, Faculty of Natural Resources, University of Tehran

3 Associate Professor, Faculty of Natural Resources, University of Tehran

4 Associate Professor, Rangeland Research Division, Research Institute of Forests and Rangelands, Agricultural Research Education and Extension Organization (AREEO), Tehran, Iran

5 Ascociate professor, Watershed Management. Univ. of Tehran.


Rangeland production is especially important in meeting food requirement of rangeland societies. Sometimes, historical data are required for long-term grazing capacity estimation. Regression equations that are reasonably reliable for predicting forage production from precipitation characteristics have been developed for rangeland yield estimation. In this research, the relationship between forage production and meteorological factors was evaluated with six-year data for Pashaylogh and Incheboron rangelands (2003 to 2007 and 2017- Golestan province, Iran) and eleven-year data for Nemati rangeland (1998 to 2007 and 2017- Markazi province, Iran). For sampling, four parallel transects with a length of 300 m and at a distance of 100 m from each other were established in the steppe area (Nemati) and six 200-m transects were created in the semi-steppe area (Pashaylogh and Incheboron) and they were located parallel and at a distance of 100 m from each other. Due to the need for uniformity in the data of the rangelands of different provinces and their comparison, plot size of 1×2 m was selected in steppe site, and 1×1 m for semi-steppe sites. Data analysis was done through regression models. The results showed that forage production was related to temperature and precipitation rather than other meteorological factors (temperature, precipitation, sunlight hours, relative humidity, evapotranspiration and average wind speed). The best equation that can predict the relationship between meteorological data and forage production was August precipitation and temperature (R2=0.88) in Pashaylogh, the precipitation of June (R2=0.88) in Incheboron rangelands. There was a relationship between forage production (R2=0.79) with precipitation and temperature in July and in Nemati rangeland. The forage production index was determined based on effective meteorological factors and The Standardized Precipitation-Evapotranspiration (SPEI) drought index. According to meteorological data, a coefficient could be obtained to estimate long-term rangeland production and prevent from forage loss.


Main Subjects

Aauenroth, W.K., and Sala, O. E., 1992. Long-term forage production of North American shortgrass steppe. Ecological Applications, 2(4): 379-403.
Akbarzadeh, M., Moghadam, M.R. Jalili, A. Jafari M. and Arzani, H., 2007. Effect of precipitation on cover and production of rangeland plants in Polur. Journal of Natural Resources of Iran. 60(1): 307-322. (In Persian)
Andales, A.A., Derner, J.D., Ahuja, L.R., & Hart, R.H., 2006. Strategic and Tactical Prediction of Forage Production in Northern Mixed-Grass Prairie. Rangeland ecology and management, 59(6):125-135.
Arzani, H., and Abedi, M., 2013. Rangeland Assessment Survey and Monitoring. University of Tehran Press. 305p. (In Persian)
Arzani, H., and King, G.W., 1994. A double sampling method for estimating forage from cover measurement, 8th biennial rangeland conference. Australia Rangeland Society, 4(2): 201-202.
Arzani, H., 2009. Rangeland Assessment in Different climate areas –Iran. Research Institute of forests and Rangelands of Iran, 200 p.(In Persian)
Bayat, M., Arzani, H., Jalili A. and Nateghi S. 2016. The Effects of Climatic Parameters on Vegetation Cover and Forage Production of Four Grass Species in Semi-steppe Rangelands in Mazandaran Province, Iran. Journal of Rangeland Science, 6(4): 368-376.
Cabel, D. R., and Martin, S. C., 1975. Vegetation responses to grazing, rainfall, site condition and mesquite control on semi-desert range. US Department of Agriculture Forest Service Research Paper RM-KG.
Chavula, A., and Gommes, R., 2006. Development of a weather yield index (WYX) for maize crop insurance in Malawi. Food and Agriculture Organization of the United Nations, Rome
Ehsani, A., Arzani, H., Farahpour, M., Ahmadi, H., Jafari, M., Jalili, A., Mirdavoudi, H. R., Abasi, H. R., and Azimi. M.S., 2007. The effect of climatic conditions on range forage yield in steppe rangelands, Akhtarabad of Saveh. Journal of Range and Desert Research. 14(2): 249-260. (In Persian)
Fakhar Izadi, N., Naseri, K., and Mesdaghi, M., 2019. Investigation of Relationship between Precipitation and Temperature with Range Production of Grasslands in North and Northeast of Iran. Journal of Rangeland Science, 9(3): 277-285.
Ghorbani, A., Pournemati, A., and Panahandeh, M., 2017. Estimating and mapping Sabalan rangelands aboveground phytomass using Landsat 8 images. Iranian journal of range and desert research. 24(1): 30-45. (In Persian)
Gomara, I., Bellocchi, G., Martin, R., Rodriguez-Fonseca, B., and Ruiz-Ramos, M., 2020. Influence of climate variability on the potential forage production of a mown permanent grassland in the French Massif Central. Agricultural and Forest Meteorology, 280(15): 107768.
Havstad, K.M., Brown, J.R., Estell, R., Elias, E., Rango, A., and Steele. C., 2016. Vulnerabilities of southwestern US rangeland-based animal agriculture to climate change. Climatic Change, 120: 1-16.
Holechek, J.L., Pieper, R.D., and Herbel, C.H. 2004. Range management, principles and practices. 5th edition. Pearson Education, 607p.
Holechek, J.L., 2013. Global trends in population, energy use and climate: implications for policy development, rangeland management and rangeland users. The Rangeland Journal 35: 117-129.
Holechek, J.L., Cibils, A.F., Bengali, K., and Kinyamario J.L., 2017. Human population growth, African pastoralism, and rangelands. Rangeland Ecology and Management 70: 273-280.
Hui, D., Yu, C-L., Deng, Q., Dzantor, EK., Zhou, S., and Dennis, S., 2018. Effects of precipitation changes on switch grass photosynthesis, growth, and biomass: A mesocosm experiment. Journal of social science, 13(2): 12-17.
Hurtado-Uria, C., Hennessy, D., Shalloo, L., O'Connor D., and Delaby, L., 2014. Relationships between meteorological data and grass growth over time in the south of Ireland, Irish Geography, 4(6): 200-215.
IPCC (International Panel on Climate Change), 2014. Climate Change 2014: synthesis report. Fifth Assessment. International Panel on Climate Change, Geneva, Switzerland, 151 p.
Kbumalo, G., and Holecheck, j., 2005. Relationships Between Chihuahuan Desert Perennial Grass Production and Precipitation. Rangeland Ecology Management, 58: 239-246.
Kheradmand, G. 2017. Climate Variability Impacts on Land Use and Livelihoods in Drylands. Journal of Rangeland Science, 7(4): 32-48.
Kizito, E.B., Stljung, A.C., Egwang, R.W., Gullberg, T., Fregene, U., and Westerbergh, M., 2007. Quantitative trait loci controlling cyanogenic glucoside and dry matter content in cassava (Manihot esculenta Crantz) roots. Hereditas, 144: 129-136.
Krauss, KW., Keeland, BD., Allen, JA., Ewel, KC., and Johnson, DJ., 2007. Effects of season, rainfall, and hydrogeomorphic setting on mangrove tree growth in Micronesia. Biotropica 39: 161–170.
Kruse, R. E., Tess, M. W., and Heitschmidt, R. K., 2007. Livestock Management during Drought in the Northern Great Plains. I. A Practical Predictor of Annual Forage Production. Publications from USDA-ARS /UNL Faculty. 857.
Omidvar., E, Arzani. H., Mohtashamnia, S., Jafary M., and Javadi, S.A., 2020. Investigation of Climatic Parameters Affecting Annual Forage Production in BidAlam Rangeland, Abadeh, Fars Province, Iran. Journal of Rangeland Science, 10(3): 282-290.
Pfeiffera, M., Langana, L., Linstädter, A., Martens, C., Gaillarda, C., Ruppert, J.C., Higgins, S.I., Mudongo E.I. and Scheitera S., 2019. Grazing and aridity reduce perennial grass abundance in semi-arid rangelands–Insights from at rait-based dynamic vegetation model. Ecological Modelling, 395: 11-22.
Pieper, R. D., Montoya, J. R., and Groce, V. L., 1971. Site characteristics on pinyon juniper and blue grama ranges in south-central New Mexico. New Mexico Agricultural Experimental Station Bulletin 573: 20-35.
Polley, H.W., Briske, D.D., Morgan, J.A., Wolter, K., Bailey D.W., and Brown J.R., 2013. Climate change and North American rangelands: trends, projections, and implications. Rangeland Ecology and Management 66, 493-511.
Sawalhah, M.N., Holechek J.L., and Cibils. A.F., 2019. Rangeland Livestock Production in Relation to Climate and Vegetation Trend New Mexico, Rangeland Ecology & Management, 32(12): 320-332.
Smart, A. J., 2005. Forecasting Forage Production. Range Beef Cow Symposium. 39. Blackwell Publishing.
USGCRP (United State Global Change Research Program), 2018. Fourth National Climate Assessment. Volume 2. Washington, DC, USA: US Global Change Research Program, 1656 p.
Wight, J.R., Clayton, H. and Whitmer, D, 1984. Using weather records with a forage production model to forecast range forage production, Journal of Range Management, 37: 12-24.
Wisiol, K., 1984. Estimating grazing land yield from commonly available data. Journal of Range Management, 37 (5): 471-475.
WRI (World Resources Institute), 2018. World Resource Report: creating a sustainable food future: a menu to feed nearly 10 billion people by 2050. Washington, DC. World Resources Institute, USA, 96 p.
Yalcin, E., 2018. The relationships among aboveground biomass, primary productivity, precipitation and temperature grazed and ungrazed temperature grasslands from northern turkey. Black Sea Journal of Engineering and Science, 1(3): 107-113.
Yang, Y., Fang, J., Ma, W., and Wang, W., 2008. Relationship between variability in aboveground net primary production and precipitation in global grasslands. Geophysical research letters, 35(L23710): 32-45.