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| Lenguaje: | en |
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Universidad Nacional de Colombia
2020
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| Acceso en línea: | https://www.redalyc.org/articulo.oa?id=180376042010 https://www.redalyc.org/journal/1803/180376042010/ https://www.redalyc.org/journal/1803/180376042010/html/ https://www.redalyc.org/journal/1803/180376042010/180376042010.epub https://www.redalyc.org/journal/1803/180376042010/movil |
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- Influence of some environmental factors on the feijoa (Acca sellowiana Berg Burret): A review Gerhard Fischer Alfonso Parra-Coronado Agrociencias wind altitude cold adaption solar radiation base temperature Climatic alterations affect the physiology, growth and production of the feijoa, a native plant to the higher zone between Brazil, Uruguay, Paraguay and Argentina. In Colombia, optimal growth temperatures are between 13 and 21°C (16°C). Very high temperatures (>32°C) affect pollination and fruit set, but low temperatures down to -4°C in adult plants do not cause significant damage. Thus, feijoa is a well-adapted plant to cold conditions since 3.04°C has been found as the base (minimum) temperature for the phase between flower bud and fruit set, while 1.76°C was measured as the base temperature for fruit development. The plant requires a minimum of 1000 hours of direct sunlight/year (optimum>1500); the pyramidal form of the tree favors the entry of light into the crown organs. In the crown of a feijoa tree, trained with three branching levels of horizontal bent primary laterals, the outer middle quadrant produces the largest fruits, compared to those that grow in the upper quadrant. The reduced fruit growth is due to the excessive incidence of light (especially UV) and heat on these fruits on the periphery of the tree. In Colombia, altitudes between 1800 and 2700 meters above sea level (m a.s.l.) are adequate for growth and production of this fruit, while lower elevations favor the incidence of fruit flies. Precipitations between 700 and 1200 mm/year (max. 2000 mm) benefit the vegetative and reproductive performance of the tree, with an important drier season at the beginning of the reproductive season (flowering and fruit set). Due to the strength of its branches and the small, thick leaves, the tree is relatively wind resistant. 2020 artículo científico 0120-9965 https://www.redalyc.org/articulo.oa?id=180376042010 https://www.redalyc.org/journal/1803/180376042010/ https://www.redalyc.org/journal/1803/180376042010/html/ https://www.redalyc.org/journal/1803/180376042010/180376042010.epub https://www.redalyc.org/journal/1803/180376042010/movil 10.15446/agron.colomb.v38n3.88982 en http://www.redalyc.org/revista.oa?id=1803 Agronomía Colombiana application/pdf Universidad Nacional de Colombia Agronomía Colombiana (Colombia) Num.3 Vol.38