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| Main Author: | |
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| Format: | Artículo científico |
| Language: | en |
| Published: |
Universidad Nacional de Colombia
2017
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| Online Access: | https://www.redalyc.org/articulo.oa?id=169951832011 https://www.redalyc.org/journal/1699/169951832011/ https://www.redalyc.org/journal/1699/169951832011/html/ https://www.redalyc.org/journal/1699/169951832011/169951832011.epub https://www.redalyc.org/journal/1699/169951832011/movil |
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Table of Contents:
- Gas exchange in ‘BRS Princesa’ banana (Musa spp.) under partial rootzone drying irrigation in the north of Minas Gerais, Brazil Marcelo Rocha dos Santos Sérgio Luiz Rodrigues Donato Alessandro de Magalhães Arantes Eugênio Ferreira Coelho Polyanna Mara de Oliveira Agrociencias Abiotic stress water deficit stomatal closure vegetative growth photosynthetic rate This research aimed to evaluate physiological characteristics of ‘BRS Princesa’ banana under partial rootzone drying irrigation, PRD. The five treatments, 1 - 50% of reduction in water depth (WD) with a frequency alternation of irrigation side (FA) of seven days during the whole production cycle; 2 - 50% of WD and FA of 14 days in the cycle; 3 - 50% of WD and FA of 21 days; 4 - 50% of WD with a fixed irrigation (only one lateral line on one side of the plant); and 5 - full irrigation (two lateral lines with open shutoff valve) throughout the cycle, they were arranged in a randomized block design with five replicates. There is a reduction in photosynthetic rates and water use efficiency as a result of enzymatic impairment or stomatal closure, due to the increased of leaf temperature. The stomatal conductance - gs was lower in plants irrigated with 50% of ETc with fixed irrigation in one side of the plant. Even with water deficit in the soil, using the PRD with 50% of ETc, Photosynthesis - A Transpiration - E ; Leaf temperature - Tleaf , internal concentration of CO 2 - Ci ; stomatal conductance - gs ; photosynthetically active radiation - Qleaf ; carboxylation efficiency - A/Ci ; Quantum efficiency of Photosynthesis - A/Qleaf ; and instantaneous water use efficiency – WUE ‘BRS Princesa’ banana were similar among strategies, highlighting the possibility of use of the irrigation management technique with PRD, saving water, and no physiological changes in the plants. 2017 artículo científico 0120-2812 https://www.redalyc.org/articulo.oa?id=169951832011 https://www.redalyc.org/journal/1699/169951832011/ https://www.redalyc.org/journal/1699/169951832011/html/ https://www.redalyc.org/journal/1699/169951832011/169951832011.epub https://www.redalyc.org/journal/1699/169951832011/movil en http://www.redalyc.org/revista.oa?id=1699 Acta Agronómica application/pdf Universidad Nacional de Colombia Acta Agronómica (Colombia) Num.3 Vol.66