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Biblioteca(s): |
Epagri-Sede. |
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Data corrente: |
06/01/2005 |
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Data da última atualização: |
06/01/2005 |
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Autoria: |
MOURA, V. P. G.; VALE, A. T. do; ISAIAS, F. B. |
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Título: |
Comparacao entre dois metodos de avaliacao da variabilidade genetica em volume, densidade basica da madeira e materia seca de Pinus tecunumanii (Schwd) Eguiluz e perry. |
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Ano de publicação: |
2004 |
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Fonte/Imprenta: |
Ciencia Florestal, Santa Maria, v. 14, n. 1, p. 77-84, 2004. |
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Idioma: |
Português |
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Palavras-Chave: |
Densidade basica; Herdabilidade; Materia seca; Pinus tecunumanii. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00624naa a2200181 a 4500
001 1010071
005 2005-01-06
008 2004 bl uuuu u00u1 u #d
100 1 $aMOURA, V. P. G.
245 $aComparacao entre dois metodos de avaliacao da variabilidade genetica em volume, densidade basica da madeira e materia seca de Pinus tecunumanii (Schwd) Eguiluz e perry.
260 $c2004
653 $aDensidade basica
653 $aHerdabilidade
653 $aMateria seca
653 $aPinus tecunumanii
700 1 $aVALE, A. T. do
700 1 $aISAIAS, F. B.
773 $tCiencia Florestal, Santa Maria$gv. 14, n. 1, p. 77-84, 2004.
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Biblioteca(s): |
Epagri-Sede. |
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Data corrente: |
05/05/2020 |
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Data da última atualização: |
05/05/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
Internacional - A |
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Autoria: |
BORTOLETTO-SANTOS, R.; GUIMARAES, G. G. F.; RONCATO JÚNIOR, V.; CRUZ, D. F.; POLITO, W. L.; RIBEIRO, C. |
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Título: |
Biodegradable oil-based polymeric coatings on urea fertilizer: N release kinetic transformations of urea in soil. |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
Scientia Agricola, Piracicaba, SP, v. 77, n. 1, p. 1-9, 2020. |
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Idioma: |
Inglês |
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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. |
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Palavras-Chave: |
controlled release; nitrogen; plant nutrition; polyurethane; soil fertility. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 01735naa a2200241 a 4500
001 1129614
005 2020-05-05
008 2020 bl uuuu u00u1 u #d
100 1 $aBORTOLETTO-SANTOS, R.
245 $aBiodegradable oil-based polymeric coatings on urea fertilizer$bN release kinetic transformations of urea in soil.$h[electronic resource]
260 $c2020
520 $aPolymer 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.
653 $acontrolled release
653 $anitrogen
653 $aplant nutrition
653 $apolyurethane
653 $asoil fertility
700 1 $aGUIMARAES, G. G. F.
700 1 $aRONCATO JÚNIOR, V.
700 1 $aCRUZ, D. F.
700 1 $aPOLITO, W. L.
700 1 $aRIBEIRO, C.
773 $tScientia Agricola, Piracicaba, SP$gv. 77, n. 1, p. 1-9, 2020.
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