Calibration and validation of a node appearance model in soybean crop

Bexaira, Kelin Pribs; Streck, Nereu Augusto; Zanon, Alencar Júnior; Tagliapietra, Eduardo Lago; Richter, Gean Leonardo; Weber, Patric Scolari

doi:10.1590/1807-1929/agriambi.v25n6p361-371

Rev. bras. eng. agríc. ambient.

2021

DOI: 10.1590/1807-1929/agriambi.v25n6p361-371

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Calibration and validation of a node appearance model in soybean crop

Kelin Pribs Bexaira

Nereu Augusto Streck

Alencar Júnior Zanon

et al.

Abstract: HIGHLIGHTS Improvement of the simulation by calculating a temperature function with the daily minimum and maximum temperatures. Equation to determine the maximum rate of node appearance of soybean cultivars recommended for Southern Brazil. Maximum node appearance rate varies with the maturity group and not with the type of growth of soybean cultivars.

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Modeling the initial development dynamics for two native Brazilian forest tree species

Fagundes,

Martins,

Reis

et al. 2023

Forestry: An International Journal of Forest Research

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Development models are used to quantify the dynamics and rate of initial development, the seedling phase duration, and global warming impacts on forest species. Such models relate the physiological age of the plant, through air temperature functions, to its morphological appearance, given by the cumulative leaf number on the main stem. Despite their potential, studies on initial development dynamics are still scarce, especially for native forest species. Thus, this study calibrated and evaluated the performance of two development models—Phyllochron and Wang and Engel—in estimating the cumulative leaf number and seedling phase duration of two Brazilian native forest species—Cybistax antisyphilitica (Mart.) Mart. (Bignoniaceae) and Platycyamus regnellii Benth. (Fabaceae). Cumulative leaf number and seedling phase duration data from outdoor experiments carried out during the 2017 and 2018 growing seasons with 12 sowing dates in Itajubá, Minas Gerais, Brazil, were used. These experiments provided a rich dataset for calibrating and evaluating the Phyllochron and Wang and Engel development models. Both development models were capable of predicting cumulative leaf number with low and acceptable errors for both species and produced less accurate estimates for seedling phase duration. For C. antisyphilitica, both models were remarkably similar in estimating cumulative leaf number and seedling phase duration, with a root-mean-square error of 3.3 leaves and 25 days, respectively. For P. regnellii, the Wang and Engel model was slightly better than the Phyllochron, with an error of fewer than 2.06 leaves and 13.1 days. Using the coefficients calibrated in this study and, preferably, the Wang and Engel model, it is possible to project the development of both forest species under climate change scenarios.

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Modeling the initial development dynamics for two native Brazilian forest tree species

Fagundes,

Martins,

Reis

et al. 2023

Forestry: An International Journal of Forest Research

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show abstract

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Calibration and validation of a node appearance model in soybean crop

Cited by 1 publication

References 16 publications

Modeling the initial development dynamics for two native Brazilian forest tree species

Modeling the initial development dynamics for two native Brazilian forest tree species

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