Phenological patterns of defoliation and refoliation processes of rubber tree clones in the Colombian northwest
| Autor: | Danilo Augusto Monsalve-García, Juan Pablo Gil-Restrepo, Oscar de Jesús Córdoba-Gaona, Juan José Guerra-Hincapié, Juan David Hernández-Arredondo, Enrique Martínez-Bustamante |
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| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
010504 meteorology & atmospheric sciences Horticulture phenology 01 natural sciences lcsh:Agriculture Natural rubber hevea brasiliensis Dry season tropical species lcsh:Agriculture (General) Leaf area index 0105 earth and related environmental sciences leaf area index biology Phenology lcsh:S Climatic variables Forestry biology.organism_classification Canopy openness lcsh:S1-972 Agronomy visual_art Principal component analysis visual_art.visual_art_medium Animal Science and Zoology Hevea brasiliensis Agronomy and Crop Science 010606 plant biology & botany Food Science |
| Zdroj: | Revista Facultad Nacional de Agronomía Medellín, Vol 73, Iss 3, Pp 9293-9303 (2020) |
| ISSN: | 2248-7026 0304-2847 |
| DOI: | 10.15446/rfnam.v73n3.80546 |
| Popis: | The knowledge of the defoliation-refoliation process in rubber cultivation allows the development of management strategies in the production system to improve rubber yield. The objective of this study was to determine the intensity and duration of defoliation-refoliation of rubber clones FX 3864, IAN 710 and IAN 873 in the municipality of Tarazá and the FX 3864 and IAN 873 clones in the municipality of Nechí (northwestern Colombia). From October 2015 to June 2016, the measurements of the necromass were carried out in each location for each clone. The light environment was quantified, employing the hemispheric photographs technique to estimate canopy openness percentage (CO) and leaf area index. The assessed weeks were grouped by Principal Component Analysis (PCA) based on the original phenology and climatic variables. The defoliation-refoliation process was analyzed descriptively using graphical representations of the trend for the phenological variables that best described this process. The relationship between climatic and phenological variables in the period evaluated was evidenced; the rainfall was the most critical climatic characteristic in the induction of the defoliation process. The leaf area index was reduced to a minimum value in February, with values of 0.52 for IAN 710 clone in Tarazá, and 0.64 for the IAN 873 clone in Nechí, which corresponded to the highest defoliation stage in both locations. The refoliation period was short (4 to 6 weeks) and occurred during the dry season for all the clones in both places. |
| Databáze: | OpenAIRE |
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