Data/hora: 21/06/2024 03:38:32

Biblioteca(s): | Embrapa Unidades Centrais.
Data corrente: | 23/09/2009
Data da última atualização: | 08/06/2018
Autoria: | STRECK, N. A.; PAULA, G. M. de; OLIVEIRA, F. B.; SCHWANTES, A. P.; MENEZES. N. L. de.
Afiliação: | Nereu Augusto Streck, Universidade Federal de Santa Maria; Gizelli Moiano de Paula, Universidade Federal de Santa Maria; Felipe Brendler Oliveira, Universidade Federal de Santa Maria; Ana Paula Schwantes, Universidade Federal de Santa Maria; Nilson Lemos de Menezes, Universidade Federal de Santa Maria.
Título: | Improving node number simulation in soybean.
Ano de publicação: | 2009
Fonte/Imprenta: | Pesquisa Agropecuária Brasileira, Brasília, DF, v. 44, n. 7, p. 661-668, jul. 2009.
Idioma: | Inglês
Notas: | Título em português: Melhoria na simulação do número de nós em soja.
Conteúdo: | The objective of this study was to improve the simulation of node number in soybean cultivars with determinate stem habits. A nonlinear model considering two approaches to input daily air temperature data (daily mean temperature and daily minimum/maximum air temperatures) was used. The node number on the main stem data of ten soybean cultivars was collected in a three-year field experiment (from 2004/2005 to 2006/2007) at Santa Maria, RS, Brazil. Node number was simulated using the Soydev model, which has a nonlinear temperature response function [f(T)]. The f(T) was calculated using two methods: using daily mean air temperature calculated as the arithmetic average among daily minimum and maximum air temperatures (Soydevtmean); and calculating an f(T) using minimum air temperature and other using maximum air temperature and then averaging the two f(T)s (Soydevtmm). Root mean square error (RMSE) and deviations (simulated minus observed) were used as statistics to evaluate the performance of the two versions of Soydev. Simulations of node number in soybean were better with the Soydevtmm version, with a 0.5 to 1.4 node RMSE. Node number can be simulated for several soybean cultivars using only one set of model coefficients, with a 0.8 to 2.4 node RMSE..
Palavras-Chave: | Desenvolvimento vegetativo; Estádio-V; Estádios-V; Modelo não linear; Modelo Soydev; Node appearance rate; Simulação do número de nós em soja; Taxa de aparecimento de nós; V-stages; Vegetative development.
Thesagro: | Agricultura; Glycine Max.
Categoria do assunto: | --
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/38080/1/44n07a02.pdf
Registro original: | Embrapa Unidades Centrais (AI-SEDE)

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