Data/hora: 03/07/2024 12:42:26

Biblioteca(s): 	Epagri-Sede.	
Data corrente: 	05/05/2020	
Data da última atualização: 	05/05/2020	
Autoria: 	BORTOLETTO-SANTOS, R.; GUIMARAES, G. G. F.; RONCATO JÚNIOR, V.; CRUZ, D. F.; POLITO, W. L.; RIBEIRO, C.	
Título: 	Biodegradable oil-based polymeric coatings on urea fertilizer: N release kinetic transformations of urea in soil.	
Ano de publicação: 	2020	
Fonte/Imprenta: 	Scientia Agricola, Piracicaba, SP, v. 77, n. 1, p. 1-9, 2020.	
Idioma: 	Inglês	
Conteúdo: 	Polymer coatings are used to control the rate of release of plant available nutrients
from fertilizers as well as to reduce nutrient losses such as ammonia (NH3) volatilization.
Although the literature presents several examples of materials used to coat urea, little is known
about nitrogen (N) release properties such as the mechanism involved and phenomena (e.g.,
pore opening) in the polymer coating. Thus, this study investigated urea release from polyurethane
(PU) derived from two renewable raw materials (castor oil and soybean oil), to explain
how the oil structure and coating microstructure influence release and urea-N dynamics in soil.
The results demonstrated that the profile of urea release and the urea-N mineralization in the
soil could be controlled by altering the thickness of the coating on the urea granules. Coating
by eco-friendly polymer was efficient in controlling urea release in soil to reduce volatilization of
ammonia and increase the availability of N in the soil.	
Palavras-Chave: 	controlled release; nitrogen; plant nutrition; polyurethane; soil fertility.	
Categoria do assunto: 	X Pesquisa, Tecnologia e Engenharia	
URL: 	http://intranetdoc.epagri.sc.gov.br/producao_tecnico_cientifica/DOC_45310.pdf	
Registro original: 	Epagri-Sede (Epagri-Sede)	
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