Effect of nitrogen, phosphorus, and potassium doses on tree tomato (Solanum betaceum Cav.) growth in the vegetative phase

The objective of this study was to evaluate the effects of nitrogen, phosphorus and potassium doses on tree tomato (Solanum betaceum Cav.) growth in the vegetative phase. This research was conducted under greenhouse conditions at the National University of Colombia, Bogotá. A randomized block design...

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Autores:
Tipo de recurso:
http://purl.org/coar/resource_type/c_6929
Fecha de publicación:
2018
Institución:
Universidad Pedagógica y Tecnológica de Colombia
Repositorio:
RiUPTC: Repositorio Institucional UPTC
Idioma:
spa
OAI Identifier:
oai:repositorio.uptc.edu.co:001/16803
Acceso en línea:
https://revistas.uptc.edu.co/index.php/ciencias_horticolas/article/view/7469
https://repositorio.uptc.edu.co/handle/001/16803
Palabra clave:
Relative growth rate
leaf area index
leaf number
net assimilation rate
Solanaceae.
SB354-402
SB109.7-111
S631-667
Tasa relativa de crecimiento
índice de área foliar
número de hojas
tasa de asimilación neta
Solanaceae.
SB354-402
SB109.7-111
S631-667
Rights
License
https://creativecommons.org/licenses/by-nc/4.0/
Description
Summary:The objective of this study was to evaluate the effects of nitrogen, phosphorus and potassium doses on tree tomato (Solanum betaceum Cav.) growth in the vegetative phase. This research was conducted under greenhouse conditions at the National University of Colombia, Bogotá. A randomized block design was employed to evaluate eight treatments with three replicates as follows: i) CC: commercial control, ii) CS: control without fertilization, iii) Low N: 10% of the recommended dose (DR); iv) Low P: 10% DR; v) Low K: 10% DR, vi) High N: 200% DR; vii) High P: 200% DR, and viii) High K: 200% DR. The fertilizer plan was adjusted according to the soil analysis and doses reported for the species. To determine plant growth, growth rate indexes were used based on the functional logistic model. The treatment without fertilization CS and High P reduced the leaf area, number of leaves, stem length, and dry mass of leaves of the tree tomatoes by about 50%, unlike the commercial control (CC). The Low K treatment increased the same variables by 70%, as well as the total dry mass. For growth rates, the Low K treatment resulted in the highest leaf area index and relative growth rate, and the High K treatment presented the highest crop growth rate.