J. Bio. Env. Sci.5(1), 179-188, July 2014
Growing cycle is a cycle that it’s during enough humidity, lack of thermal limits; make the production of agricultural crops possible. Evidences show that time of germination season is getting longer about 10-20 days in recent decade. So that early starting is noticeable. This increase of germination season is associated with global warming. The general goal of this article is the survey of changes and zoning of growing season length based on thermal bases 5° and 10c° in 31 Iran synoptic stations during 20 years common statistical cycle using at least daily temperature from 1961 to 2009 DC (1366 -1386 Solar month). In this study is used 49 years data of Iran synoptic stations (1961-2009) to study how is starting and ending of changes trend and germination season length thermal bases 5° and 10° c. the random data is tested by Man-Cendal test, and the series having changes or trend with reliability level 0.05 α are determined . Then by the Man-Cendal graphical test how and starting time of trend or changes is determined and changes value measured. The research result show more changes in the series related to the starting and the ending of germination season with thermal bases 10°c to series with 5c°. In spite of other stations, Oroomiyeh, Khoramabad, Saghez, Shahrekord is faced with decreasing of germination season. Zoning maps showed that growing season length in the studied area is decreased from south to west and west north, so that in the studied thermal bases, Bandarabas station has longest and Shahrekord station has shortest growing season length among other stations.
Anon. 1978. Reports of the agro-ecological zones project.(1978). World Soil Resources Reports. 48.
Basistha A, Arya DS, Goel NK. 2009. Analysis of historical changes in rainfall in the Indian Himalayas. International Journal of Climatology 29, 555–572.
Beck PSA, Karlsen SR, Skidmore A, Nielsen L, Hogda KA. 2005. The onset of the growing season in northwestern Europe, mapped using MODIS NDVI and calibrated using phonological ground observations. In: Proceedings of the 31st International Symposium on Remote Sensing on Environment—Global Monitoring For Sustainability and Security, 20–24 June, St. Petersburg, www.isprs.org/publications/related/ISRSE/html/wel come.html.
Chmielewski FM, Rötzer T. 2001. Response of tree phenology to climate change across Europe. Agric. For. Meteorol. 108, 101–112.
Deni SM, Suhaila J, Zin WZW, Jemain AA. 2010. Spatial trends on dry spells over Peninsular Malaysia during monsoon seasons. Theoretical and Applied Climatology 99, 357–371.
EEA. 2004. Impacts of Europe’s Changing Climate— An Indicator Based Assessment. European Environment Agency Report No. 2/2004. 107.
Fitter AH, Fitter RSR. 2002. Rapid changes in flowering time in British plants. Science 296, 1689– 1691.
Frich P, Alexander LV, Della-Marta P, Gleason B, Haylock M, Klein Tank AMG, Peterson T. 2002. Observed coherent changes in climatic extremes during the second half of the 20th century. Climate Res. 19, 193–212.
IPCC. 2001. In: Houghton, J.T., Ding, Y., Griggs, D.J., Noguer, M., van der Linden, P.J., Dai, X., Manskell, K., Johnson, C.A. (Eds.), Climate Change: The Scientific Basis. Contribution of Working Group I to the Third Assessment Report of the International Panel on Climate Change. Cambridge University Press, Cambridge, United Kingdom, 881 p.
Jaagus J. 2006. Climatic changes in Estonia during the second half of the 20th century in relationship with changes in large-scale atmospheric circulation. Theor. Appl. Climatol. 83, 77–88.
Jeong SJ, Ho CH, Gim HJ, Brown ME. 2011. Phenology shifts at start vs end of growing season in temperate vegetation over the Northern Hemisphere for the period 1982–2008. Global Change Biol. 17, 2385–2399.
Jones PD, Briffa KR, Osborn TJ, Moberg A, Bergstro¨ MH. 2002. Relationships between circulation strength and the variability of growing-season and cold-season climate in northern and central Europe. The Holocene 12, 643–656.
Kozlov MV, Berlina NG. 2002, Decline in length of the summer season on the Kola Peninsula Russia, Climatic Change 54, 387-398.
Linderholm HW, Walther A, Chen D, Moberg A. 2006. Twentieth-century trends in the thermal growing-season in the Greater Baltic Area. Climatic Change, in press.
Menzel A, Estrella N, Fabian P. 2001. Spatial and temporal variability of the phenological seasons in Germany from 1951 to 1996. Global Change Biol. 7, 657–666.
Robeson SM. 2002. Increasing growing-season length in Illinois during the 20th century. Climatic Change 52, 219–238.
Song YL, Linderholm HW, Chen DL, Walther A. 2010. Trends of the thermal growing season in China, 1951–2007. Int. J. Climatol. 30, 33–43.
Zhang Q, Xu CY, Zhang Z, Chen YD. 2008. Changes of temperature extremes for 1960–2004 in Far-West China. Stoch. Environ. Res. Risk Assess. http://dx.doi.org/10.1007/s00477-008-0252-4.
Yue S, M Hashino. 2003, Temperature trends in Japan: 1900–1996, Theor. Appl. Climatol. 75, 15–27