Showing 3 results for Sugar Beet
Mohsen Azizi, Hossein Mohammadi, Dariush Taleghani,
Volume 0, Issue 0 (3-1921)
Abstract
The aim of the current research is to show the potential areas for autumn sugar beet cultivation in Golestan province according to temperature and precipitation parameters. For this purpose, temperature (daily) and precipitation (annual) statistics were used for a statistical period of 15 years (2006-2020). In order to analyze the data, the methods of thermal potential diagrams, deviation from optimal conditions, phenology and zoning of Golestan province in terms of the amount of irrigation during growth were used from the annual rainfall data. The results of temperature evaluation using the thermal potential method based on the thermal threshold showed zero, 4 and 10 degrees Celsius at the level of stations in Golestan province; Inche Brun station has the highest cumulative thermal unit and Aliabad Katul station has the lowest cumulative thermal unit. Examining the date of the probability of late spring frost at the level of 95% showed that due to its occurrence at the end of April in the center, east, north, northeast and west of Golestan province, it coincides with the phenological stage of root bulking and sugar accumulation. Also, based on the deviation from the optimal conditions in Golestan province, Inche Brun station was calculated to have the lowest deviation (-20.64). Also, in terms of phenology, in the stage of budding, six leaves, root bulking and sugar accumulation and full ripening of the autumn sugar beet plant in Golestan province, the favorable areas for autumn sugar beet cultivation in Golestan province were determined, including Gonbadkavus, Bandar Turkman, Kalaleh, Inche Brun and Bandar Gaz. Also, the evaluations in terms of rainfall according to the annual rainfall zoning map of Golestan province, it can be concluded that in terms of rainfall and water supply required for autumn sugar beet, there is not much limitation towards Golestan province, however, considering the recent multi-year droughts, the cultivation of this plant in the province needs additional irrigation for growth.
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Volume 17, Issue 46 (9-2017)
Abstract
Since the most important climatic parameter affecting sugar beet cultivation is the temperature, we carried out this research considering climatic elements such as temperature, precipitation and freezing days in relation to autumn sugar beet planting. Daily temperatures of selected stations in a period of 10 years (2005-2015) has been used for agroclimatic analysis. In order to evaluate that, thermal potential assessment, deviation from optimal conditions and active day gradient index (GDD) were used. The evaluation of thermal potential based on the threshold of 0, 4, and 10 degrees Centigrade at the station levels in Kermanshah province showed that Sar-e-Pol-e-Zahab Station has the highest cumulative thermal unit and Kangavar Station has the least one. In Isfahan province, Khour-va-Biabanak station has the highest cumulative thermal unit and Khansar station has the lowest unit. Based on the deviation from optimal conditions in Kermanshah province, Sar-e-Pol-e-Zahab station has the lowest (-27.79) and in Khour-va-Biabanak station (-21.78) had the least deviation from optimal conditions. Planting date at the stations was considered based on the autumn temperature. In Kermanshah province, Sar-e-Pol-e Zahab station had the earliest date of harvest (May 1st.), while this date in Isfahan province was for Khour-va-Biabanak station (May 9th.). Suitable areas for planting in Kermanshah province are found to be the eastern and northeastern regions of Sar-e-Pol-e Zahab and Qasr-Shirin. In the province of Isfahan, the northern and western parts of Khour-va-Biabanak and Kashan were the most proper regions and central areas are in the next steps.
Mrs Somayeh Naderi, Prof. Bohloul Alijani, Prof. Zahra Hedjazizadeh, Dr. Hasan Heidari, Dr. Karim Abbaspour,
Volume 24, Issue 73 (6-2024)
Abstract
Evidence suggests that climate change will create uncertain regional agricultural production stability in the coming decades. This research investigated the impact of climate change on hydrology and sugar beet yield as one of the main crops in the Urmia lake basin using the Soil and Water Assessment Tool (SWAT). To address this, a baseline SWAT model was setup for 1986-2014. Afterward, the output was calibrated (1989-2004) and validated (2005-2014) in the SWAT-CUP software using the SUFI2 algorithm to simulate streamflow of 23 gauging stations and crop yield. The Nash-Sutcliffe efficiency was 0.43 and 0.53 for calibration and validation periods, sequentially. The Percent Bias was 45% and 16% for calibration and validation periods, respectively. As well as the agreement indices of 0.71 and the little Percent Bias (-6% to 10%) for crop production, verified the model's efficiency. The next step was downscaling and bias-correction of the precipitation and temperature data received from 3 climate models, namely GFDL, HadGEM2, and IPSL under RCP4.5 and RCP8.5 using CCT program. Then, the downscaled data were fed to SWAT, and Finally, hydrological fluxes and sugar beet yield were estimated for 2021-2050. Despite a dispersion of precipitation changes ranging from -12% to +35% in most scenarios, results highlight the pivotal role that the warmer temperature (+2.7°C) increases evaporation, resulting in sharpened pressure on water resources and runoff, especially, at the beginning of crop growth season. Finally, the negative impacts on crop productivity (-45%) is not unexpected. This means that sugar beet may suffer from climate change impacts, and the production of this plant will change over the next period in this region.
Keywords: Climate Change, Sugar Beet, Urmia Lake Basin, Sensitivity Analysis, SWAT.
