ZONING BY WATER BALANCE OF RICE CROP IN RÍO GRANDE BASIN
In the management of agricultural systems, hydric balance is an essential tool, as it helps us in the decision-making process and crops planning. The objective of this study was zoning by water balance of rice cultivation in Rio Grande basin. It was compiled all the climatological historic data since 1995, from weather stations located within and in bordering areas of Rio Grande basin, using information provided for Electric Transmission Company, S.A. (ETESA). With the compiled and adjusted agro climatic information, there were calculated the pontential evapotranspiration (ETP), solar brightness, index of monthly heat and field capacity. Thornthwaite´s equation was utilized in the ETP calculation. Knowing the monthly values of surface runoff by applying the water balance equation, the Rio Grande Basin has an annual rainfall average of 2112,9 mm and an mean evapotranspiration of 637,7 mm, which means a shortage of 131,8 mm. According to these results, the Rio Grande basin has deficit from December to April, the surplus and storage from mid May to mid-December and reserve from January to March. The final zoning was build up considering the excesses that were obtained from the water balance, soil fertility maps, CARTAP and crop requirements.
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| Format: | Digital revista |
| Language: | spa |
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Instituto de Innovación Agropecuaria de Panamá
2015
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| Online Access: | http://www.revistacienciaagropecuaria.ac.pa/index.php/ciencia-agropecuaria/article/view/123 |
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