Abstract
Abstract Pequi tree is a species native to the Brazilian cerrado, with wide geographic distribution, whose fruit is very appreciated in cooking, composing traditional dishes. In general, pequi fruit is consumed when ripe in the fresh form or in the various derived products such as oils, liqueurs, sweets, ice creams among others, involving important socioeconomic activity generating employment and income in family agriculture. The aim of this study was to evaluate the adjustment of Brody, Gompertz, Logistic and Von Bertalanffy models in the growth and development of pequi fruits based on their physical characteristics such as longitudinal and cross-sectional diameter and fresh mass obtained over time. Parameters were estimated using R software routines, using the least squares method and the Gauss-Newton iterative process. The adjustment of models was compared using the following criteria: residual standard deviation, adjusted determination coefficient and corrected Akaike information criterion. In general, data presented no correlation error structure and the Von Bertalanffy model did not fit fresh mass data. The models presented good quality in the adjustment to pequi growth data, except for the Brody model for fresh mass. The Gompertz and Logistic models were those that best described variables, and the Gompertz model was the most suitable to describe diameter and mass data. Based on the adjustment, a slow initial growth was observed up to about 20 days after anthesis; after this period, the fruit developed more rapidly up to 90 days and then presented a tendency to stability until the end of the evaluation period at 117 days after anthesis, with sigmoid curve character. Pequi fruits obtained final average value of 7.1 cm for cross-sectional diameter, 6.8 cm for longitudinal diameter and 113g for fresh mass.
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Claims 11
Claim · model-written summary
Pequi fruit data showed no correlated error structure.
Verbatim
e0“data presented no correlation error structure”
e1“pequi growth data”
Claim · model-written summary
Von Bertalanffy did not fit pequi fruit fresh mass.
Verbatim
e0“the Von Bertalanffy model did not fit fresh mass data.”
e1“pequi fruit is consumed”
Claim · model-written summary
Brody model was an exception to generally good pequi growth model fits for fresh mass.
Verbatim
e0“The models presented good quality in the adjustment to pequi growth data, except for the Brody model for fresh mass.”
Claim · model-written summary
Gompertz and Logistic best described the pequi growth variables.
Verbatim
e0“The Gompertz and Logistic models were those that best described variables”
e1“pequi growth data”
Claim · model-written summary
Gompertz was most suitable for pequi diameter and mass data.
Verbatim
e0“the Gompertz model was the most suitable to describe diameter and mass data.”
e1“pequi fruits”
Claim · model-written summary
Pequi fruit grew slowly through about 20 days after anthesis.
Verbatim
e0“a slow initial growth was observed up to about 20 days after anthesis”
e1“pequi fruits”
Claim · model-written summary
Pequi fruit developed more rapidly to 90 days.
Verbatim
e0“the fruit developed more rapidly up to 90 days”
e1“pequi fruits”
Claim · model-written summary
Pequi fruit growth tended to stabilize until 117 days after anthesis.
Verbatim
e0“presented a tendency to stability until the end of the evaluation period at 117 days after anthesis, with sigmoid curve character.”
e1“pequi fruits”
Claim · model-written summary
Final pequi cross-sectional diameter averaged 7.1 cm.
Verbatim
e0“Pequi fruits obtained final average value of 7.1 cm for cross-sectional diameter, 6.8 cm for longitudinal diameter and 113g for fresh mass.”
Claim · model-written summary
Final pequi longitudinal diameter averaged 6.8 cm.
Verbatim
e0“Pequi fruits obtained final average value of 7.1 cm for cross-sectional diameter, 6.8 cm for longitudinal diameter and 113g for fresh mass.”
Claim · model-written summary
Final pequi fresh mass averaged 113g.
Verbatim
e0“Pequi fruits obtained final average value of 7.1 cm for cross-sectional diameter, 6.8 cm for longitudinal diameter and 113g for fresh mass.”