Data/hora: 06/06/2024 02:19:56

Provedor de dados: 	90	
País: 	Brazil	
Título: 	APPRAISAL OF THE SNAP MODEL FOR PREDICTING NITROGEN MINERALIZATION IN TROPICAL SOILS UNDER EUCALYPTUS	
Autores: 	Smethurst,Philip James; Gonçalves,José Leonardo de Moraes; Pulito,Ana Paula; Gomes,Simone; Paul,Keryn; Alvares,Clayton Alcarde; Arthur Júnior,José Carlos.	
Data: 	2015-04-01	
Ano: 	2015	
Palavras-chave: 	Forest soil; Soil temperature; Process-based model.	
Resumo: 	The Soil Nitrogen Availability Predictor (SNAP) model predicts daily and annual rates of net N mineralization (NNM) based on daily weather measurements, daily predictions of soil water and soil temperature, and on temperature and moisture modifiers obtained during aerobic incubation (basal rate). The model was based on in situ measurements of NNM in Australian soils under temperate climate. The purpose of this study was to assess this model for use in tropical soils under eucalyptus plantations in São Paulo State, Brazil. Based on field incubations for one month in three, NNM rates were measured at 11 sites (0-20 cm layer) for 21 months. The basal rate was determined in in situ incubations during moist and warm periods (January to March). Annual rates of 150-350 kg ha-1 yr-1 NNM predicted by the SNAP model were reasonably accurate (R2 = 0.84). In other periods, at lower moisture and temperature, NNM rates were overestimated. Therefore, if used carefully, the model can provide adequate predictions of annual NNM and may be useful in practical applications. For NNM predictions for shorter periods than a year or under suboptimal incubation conditions, the temperature and moisture modifiers need to be recalibrated for tropical conditions.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000200523	
Editor: 	Sociedade Brasileira de Ciência do Solo	
Relação: 	10.1590/01000683rbcs20140379	
Formato: 	text/html	
Fonte: 	Revista Brasileira de Ciência do Solo  v.39 n.2 2015	
Fonte: 	info:eu-repo/semantics/openAccess