| Revista: | Scientia Agricola |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000456219 |
| ISSN: | 0103-9016 |
| Autores: | Fraga-Junior, Luciano Sobral1 Vellame, Lucas Melo2 Oliveira, Aureo Silva de2 Paz, Vital Pedro da Silva2 |
| Instituciones: | 1Universidade de Sao Paulo, Escola Superior de Agricultura "Luiz de Queiroz", Piracicaba, Sao Paulo. Brasil 2Universidade Federal do Reconcavo da Bahia, Centro de Ciencias Agrarias e Ambientais, Cruz das Almas, Bahia. Brasil |
| Año: | 2021 |
| Volumen: | 78 |
| Número: | 2 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental, analítico |
| Resumen en inglés | Cocoa plantations in Brazil have been expanding beyond the borders of traditional regions by implementing a strategy based on irrigation and the establishment of crops exposed to full sunlight. The quantification of transpiration is essential to the establishment and management of crops, and is the main factor in the determination of water demand. This study had as its objective the estimating of transpiration of young cocoa trees as a function of reference evapotranspiration (ETo) and soil matric potential (Ψw). Two experiments were conducted, one in a greenhouse and the other in the field, using clones and seminal plants. Soil water content, plant transpiration and reference evapotranspiration were monitored. Cocoa trees were subjected to soil moisture reduction and their transpiration decreased linearly both in the field and in the greenhouse, due to decreases in the soil matric potential beyond a critical point. In the greenhouse average transpiration could be linearly estimated as a function of ETo when Ψw was higher than –24.89 kP. Drying soil conditions resulted in a reduction in transpiration by approximately a 2 % per unit decrease in Ψw. Under field conditions; clonal plant transpiration decreased linearly beyond the critical matric potential of –65.02 kPa, while in seminal plants this reduction occurred beyond –79.48 kPa. Clonal plants were more sensitive to soil water variations with average transpiration lower than that of seminal cocoa tree plants |
| Disciplinas: | Agrociencias, Biología |
| Palabras clave: | Plantas para uso industrial, Suelos, Fisiología vegetal, Cacao, Theobroma cacao, Evapotranspiración, Estrés hídrico |
| Keyword: | Plants for industrial use, Soils, Plant physiology, Theobroma cacao, Cocoa, Evapotranspiration, Water stress |
| Texto completo: | Texto completo (Ver HTML) Texto completo (Ver PDF) |
