Coeficiente de cultivo da pitaia (Hylocereus sp.)
The crop coefficient (Kc) is directly related to the phenological and physiological characteristics of the crops. The major problem in managing irrigation through the method that relates the irrigation with the reference evapotranspiration (ETo) is in determination Kc values which can be consistent...
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| Formato: | bachelorThesis |
| Idioma: | pt_BR |
| Publicado em: |
Universidade Federal do Rio Grande do Norte
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| Endereço do item: | https://repositorio.ufrn.br/handle/123456789/46626 |
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| Resumo: | The crop coefficient (Kc) is directly related to the phenological and physiological characteristics of the crops. The major problem in managing irrigation through the method that relates the irrigation with the reference evapotranspiration (ETo) is in determination Kc values which can be consistent with the local cultivation conditions. In despite of weighing lysimeters are more reliable, the drainage lysimeters when well managed allow obtaining reliable results of crop evapotranspiration (ETc), that in relation to ETo results in Kc. The work was carried out in the didactic orchard of the agricultural campus at Federal University of Rio Grande do Norte (UFRN), located in Macaíba/RN. This work aimed to determine the water requirement of dragon fruit (Hylocereus sp.) at different stages of development. The Kc was determined by two different methods, the direct one, using the data obtained in drainage lysimeters by a grass reference crop and the indirect one, using the equation of Hargreaves & Samani. The dragon fruit crop coefficient determined through this work was 0.71 in the initial phase and a maximum value of 0.77 in the flowering phase, decreasing the value in late phase. The behavior of the Kc data for dragon fruit by direct method was more consistent with the cultivation reality, showing higher values that ones estimated by the indirect method. |
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