Data/hora: 04/06/2024 12:38:36

Provedor de dados: 	86	
País: 	Brazil	
Título: 	Improving node number simulation in soybean	
Autores: 	Streck,Nereu Augusto; Paula,Gizelli Moiano de; Oliveira,Felipe Brendler; Schwantes,Ana Paula; Menezes,Nilson Lemos de.	
Data: 	2009-07-01	
Ano: 	2009	
Palavras-chave: 	Glycine max; Node appearance rate; Vegetative development; V-stages.	
Resumo: 	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 (Soydev tmean); and calculating an f(T) using minimum air temperature and other using maximum air temperature and then averaging the two f(T)s (Soydev tmm). 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 Soydev tmm 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.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000700002	
Editor: 	Embrapa Secretaria de Pesquisa e Desenvolvimento

Pesquisa Agropecuária Brasileira	
Relação: 	10.1590/S0100-204X2009000700002	
Formato: 	text/html	
Fonte: 	Pesquisa Agropecuária Brasileira  v.44 n.7 2009	
Fonte: 	info:eu-repo/semantics/openAccess