Data/hora: 13/06/2024 08:06:36

Provedor de dados: 	Ciência e Agrotecnologia	
País: 	Brazil	
Título: 	Phosphorus transfer at a small catchment in southeastern Brazil: distributed modelling in different land use scenarios	
Autores: 	Bispo,Diêgo Faustolo Alves; Silva,Marx Leandro Naves; Marques,João José Granate de Sá e Melo; Bechmann,Marianne; Batista,Pedro Velloso Gomes; Curi,Nilton.	
Data: 	2017-09-01	
Ano: 	2017	
Palavras-chave: 	P index; Nutrient loss; Water erosion; Land use management; Environmental services.	
Resumo: 	ABSTRACT Identifying and ranking nutrient loss risk areas are important steps towards integrated catchment management. This study aimed to apply the P index model at the Posses catchment, south of the state of Minas Gerais, Brazil. We applied the P index for the current land use at the Posses catchment and for two hypothetical scenarios: scenario 1, in which P fertilizer was applied to all land uses, except for native forests; and scenario 2, which considered the use of P fertilizer as in scenario 1, and that the Environmental Protection Areas referring to the riparian forests and springs were totally restored. Considering current land use, almost the whole catchment area (91.4%) displayed a low P loss risk. The highest P index was associated to croplands and eucalyptus plantations. Regarding scenario 1, areas under pasture fell into the low (15.1%), medium (45.5%), high (27.1%) and very high (12.3%) P index categories. Environmental Protection Areas on scenario 2 decreased the P loss risk from the scenario 1 in 37.6%. Hence, the model outputs indicate that the reforestation of buffer zones can decrease P loss risk in the case increasing use of P fertilizer. The P index model is a potential support tool to promote judicious use of fertilizers and conservation practices at the Posses catchment.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000500565	
Editor: 	Editora da Universidade Federal de Lavras	
Relação: 	10.1590/1413-70542017415012217	
Formato: 	text/html	
Fonte: 	Ciência e Agrotecnologia  v.41 n.5 2017	
Fonte: 	info:eu-repo/semantics/openAccess