Water requirement and crop coefficients of sorghum in Apodi Plateau
ABSTRACT Sorghum is of significant economic importance for Northeastern Brazil, since it exhibits high growth rates in regions with irregular rainfall distribution and high temperatures, and is an alternative to corn, which has greater water requirements. Despite being a traditional crop in the regi...
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Universidade Federal de Campina Grande
2021-08-01
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| Series: | Revista Brasileira de Engenharia Agrícola e Ambiental |
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| author | João G. A. Lima José Espínola Sobrinho José F. de Medeiros Paula C. Viana Rudah M. Maniçoba |
| author_facet | João G. A. Lima José Espínola Sobrinho José F. de Medeiros Paula C. Viana Rudah M. Maniçoba |
| author_sort | João G. A. Lima |
| collection | DOAJ |
| description | ABSTRACT Sorghum is of significant economic importance for Northeastern Brazil, since it exhibits high growth rates in regions with irregular rainfall distribution and high temperatures, and is an alternative to corn, which has greater water requirements. Despite being a traditional crop in the region, there are few studies on irrigation management in the Apodi plateau. The aim of this study was to determine the evapotranspiration of the crop and the crop coefficient (Kc) for the different stages of sorghum growth in two cycles, and establish the relationship between the Kc and the normalized difference vegetation index (NDVI) obtained by radiometry. Two weighing lysimeters were used to estimate crop evapotranspiration (ETc). Reference evapotranspiration (ETo) was estimated by the Penman-Monteith method (FAO) and the crop coefficient determined using two methodologies: simple Kc and dual Kc. Total crop evapotranspiration in the two cycles was 452 and 557 mm. The ETc value was 23% higher in the second cycle compared to the first. The maximum Kc values for the first and second cycles were 1.21 and 1.35, respectively, using the dual Kc methodology. The linear relationship found between the Kc values and the NDVI allows monitoring and estimating the water requirements of the crop. |
| format | Article |
| id | doaj-art-2c1441d60a0140bb96e83971aabdbdf4 |
| institution | DOAJ |
| issn | 1807-1929 |
| language | English |
| publishDate | 2021-08-01 |
| publisher | Universidade Federal de Campina Grande |
| record_format | Article |
| series | Revista Brasileira de Engenharia Agrícola e Ambiental |
| spelling | doaj-art-2c1441d60a0140bb96e83971aabdbdf42025-08-20T03:04:02ZengUniversidade Federal de Campina GrandeRevista Brasileira de Engenharia Agrícola e Ambiental1807-19292021-08-01251068468810.1590/1807-1929/agriambi.v25n10p684-688Water requirement and crop coefficients of sorghum in Apodi PlateauJoão G. A. Limahttps://orcid.org/0000-0002-2237-3364José Espínola Sobrinhohttps://orcid.org/0000-0002-4953-245XJosé F. de Medeiroshttps://orcid.org/0000-0003-1202-8783Paula C. Vianahttps://orcid.org/0000-0002-9022-6868Rudah M. Maniçobahttps://orcid.org/0000-0002-6626-5955ABSTRACT Sorghum is of significant economic importance for Northeastern Brazil, since it exhibits high growth rates in regions with irregular rainfall distribution and high temperatures, and is an alternative to corn, which has greater water requirements. Despite being a traditional crop in the region, there are few studies on irrigation management in the Apodi plateau. The aim of this study was to determine the evapotranspiration of the crop and the crop coefficient (Kc) for the different stages of sorghum growth in two cycles, and establish the relationship between the Kc and the normalized difference vegetation index (NDVI) obtained by radiometry. Two weighing lysimeters were used to estimate crop evapotranspiration (ETc). Reference evapotranspiration (ETo) was estimated by the Penman-Monteith method (FAO) and the crop coefficient determined using two methodologies: simple Kc and dual Kc. Total crop evapotranspiration in the two cycles was 452 and 557 mm. The ETc value was 23% higher in the second cycle compared to the first. The maximum Kc values for the first and second cycles were 1.21 and 1.35, respectively, using the dual Kc methodology. The linear relationship found between the Kc values and the NDVI allows monitoring and estimating the water requirements of the crop.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662021001000684&tlng=enSorghum bicolorwater consumptionwater resourcesirrigation management |
| spellingShingle | João G. A. Lima José Espínola Sobrinho José F. de Medeiros Paula C. Viana Rudah M. Maniçoba Water requirement and crop coefficients of sorghum in Apodi Plateau Revista Brasileira de Engenharia Agrícola e Ambiental Sorghum bicolor water consumption water resources irrigation management |
| title | Water requirement and crop coefficients of sorghum in Apodi Plateau |
| title_full | Water requirement and crop coefficients of sorghum in Apodi Plateau |
| title_fullStr | Water requirement and crop coefficients of sorghum in Apodi Plateau |
| title_full_unstemmed | Water requirement and crop coefficients of sorghum in Apodi Plateau |
| title_short | Water requirement and crop coefficients of sorghum in Apodi Plateau |
| title_sort | water requirement and crop coefficients of sorghum in apodi plateau |
| topic | Sorghum bicolor water consumption water resources irrigation management |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662021001000684&tlng=en |
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