بررسی نقش زمان وقوع بارش در میزان تولید علوفۀ مراتع

]1] Ceballos, A., Martınez-Fernandez, J. and Luengo-Ugidos, M. A. (2004). Analysis of rainfall trends and dry periods on a pluviometric gradient representative of Mediterranean climate in the Duero Basin, Spain, Journal of Arid Environments, 58,214-232.

[2] Dolling, K., Pao-Shin, Ch. and Fujioka, F. (2003). The validity of Keetch/Bayram drought index in the Hawaiian Islands, Second International Wild land Fire Ecology and Fire Management Congress, Orlando, USA.

[3] Ehsani, A. (2007). Determination of the vegetative index to estimation of the longer term production in semi-arid regions of Iran, PhD. Thesis in Rangeland management, University of Tehran (In Persian).

[4] Fazeli, F., Ghorbanli, M. and Niknam, V. (2007). Effect of drought on biomass, protein content, lipid per oxidation and antioxidant enzymes in two sesame cultivars, Biologia Plantrum, 51(1), 98-103.

[5] http://www.cegisbd.com/study_project_rep.html (15/4/2009).

[6] http://www.digitalcommons.unl.edu/droughtnetnews/90/ (12/8/2009).

[7] http://www.fao.org//docrep/006 (07/3/2008).

[8] http://www.lwf.ncdc.noaa.gov/oa/climate/research/prelim/drought/spi.html (20/4/2008).

[9] King, J.R., Scott, J.M. and Boschma, S.P. (2006). Forage and Grassland Management. Session 22, Forage persistence under extremes of cold and drought, 403-410.

[10] Narasimhan, B., Srinivasan, R. (2005). Development and evaluation of soil moisture deficit index (SMDI) and evapotranspiration deficit index (ETDI) for agricultural drought monitoring, Agricultural and forest meteorology, 133, 69-88.

[11] Ogallo, A.L. (1993). Post-impact syndromes and drought response strategies in sub –Saharan Africa, International Journal of Climatology, 9, 145-167.

[12] Prasad, A.K., Sarkar, S., Singh, R.P. and Kafatos, M. (2007). Inter-annual variability of vegetation cover and rainfall over India, Advances in space research, 39(1), 79-87.

[13] Quiring, S.M., and Papakryakou, T.N. (2003). An evaluation of agricultural drought indices for the Canadian prairies, Agricultural and forest meteorology, 118, 49-62.

[14] Rahimzadeh Bajgiran, P., Darvishsefat, A.A., Khalili, A., Makhdoum, M.F. (2008). Using AVHRR-based vegetation indices for drought monitoring in the northwest of Iran, Journal of Arid Environments, 72, 1086-1096.

[15] Rangeland and forest research institute of Iran (2005). The research project of rangeland assessment in different climatologically regions of Iran (In Persian).

[16] Smart, A.J., Gates, R., and Dunn, B.H. (2005). Drought and stocking rate effects on forage yield from western South Dakota rangelands, Animal and rangeland sciences, 1-3.

[17] Stampfli, A. and Zeiter, M. (2004). Plant regeneration directs changes in grassland composition after extreme drought: a13- year study in southern Switzerland, Journal of Ecology, 92, 568-576.

[18] Tsugihiro, W. and Kanber, R. (2006). Innovation cross-disciplinary approach to impact assessment of climate change on agricultural production system in arid areas, Eighth International Conference on Dry land Development, Beijing, China.

[19] Turner, N.C. (2004). Sustainable production of crops and pastures under drought in a Mediterranean environment, Annals of Applied Biology, 144(2), 139-147.

[20] Weiss, J.L., Gutzler, D.S., Allred Coonrod, J.E. and Dahm, C.N. (2004). Seasonal and inter annual relationships between vegetation and climate in central New Mexico, USA, Journal of Arid Environments, 57, 507-534.

[21] White, D.H., Howden, S.M., Walcott, J.J. and Cannon, R.M. (1998). A framework for estimating the extent and severity of drought, based on a grazing system in sought-eastern Australia, Agricultural systems, 57(3), 259-270.