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Registro Completo |
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Biblioteca(s): |
Embrapa Rondônia. |
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Data corrente: |
03/12/2004 |
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Data da última atualização: |
03/12/2004 |
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Autoria: |
RODRIGUES, A. |
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Título: |
Características de reprodução, crescimento, mortalidade e produção de leite em caprinos para Alemã, Anglo-nubiana e sem raça definida (srd) nos Carirís Paraíbanos. |
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Ano de publicação: |
1988 |
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Fonte/Imprenta: |
Areia: UFPB, 1988. |
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Páginas: |
69 p. |
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Série: |
(UFPB. Tese Mestrado). |
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Idioma: |
Português |
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Conteúdo: |
O Brasil é o sexto maior criador de caprinos do mundo, com um efetivo de 9.6674.637 cabeças. Desse total, 8.667.987 encontram-se no Nordeste . |
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Palavras-Chave: |
Caprino-Crescimento; Caprino-Leite; Caprino-reprodução. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00700nam a2200169 a 4500
001 1705616
005 2004-12-03
008 1988 bl uuuu m 00u1 u #d
100 1 $aRODRIGUES, A.
245 $aCaracterísticas de reprodução, crescimento, mortalidade e produção de leite em caprinos para Alemã, Anglo-nubiana e sem raça definida (srd) nos Carirís Paraíbanos.
260 $aAreia: UFPB$c1988
300 $a69 p.
490 $a(UFPB. Tese Mestrado).
520 $aO Brasil é o sexto maior criador de caprinos do mundo, com um efetivo de 9.6674.637 cabeças. Desse total, 8.667.987 encontram-se no Nordeste .
653 $aCaprino-Crescimento
653 $aCaprino-Leite
653 $aCaprino-reprodução
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Registro original: |
Embrapa Rondônia (CPAF-RO) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Solos. Para informações adicionais entre em contato com cnps.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
11/08/2015 |
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Data da última atualização: |
09/11/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
CHALK, P. M.; CRASWELL, E. T.; POLIDORO, J. C.; CHEN, D. |
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Afiliação: |
PHILLIP M. CHALK, UNIVERSITY OF MELBOURNE; ERIC T. CRASWELL, AUSTRALIAN NATIONAL UNIVERSITY; JOSE CARLOS POLIDORO, CNPS; DELI CHEN, UNIVERSITY OF MELBOURNE. |
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Título: |
Fate and efficiency of 15 N-labelled slow- and controlled-release fertilizers. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
Nutrient Cycling in Agroecosystems, v. 102, n. 2, p. 167-178, Jun. 2015. |
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DOI: |
https://doi.org/10.1007/s10705-015-9697-2 |
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Idioma: |
Inglês |
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Conteúdo: |
Slow- and controlled-release N fertilizers are designed to increase efficiency and reduce N losses by better synchronizing N availability with plant demand. This paper reviews the use of 15N with these fertilizers to collect quantitative data on the efficiency, residual value and N losses for which relatively few data are available compared with conventional labelled urea and ammonium-based fertilizers. In general, studies of slow-release forms (isobutylidene diurea, oxamide, ureaform) with rice and upland crops show one or more benefits, including improved N uptake efficiency, and reduced N losses via leaching or NH3 volatilization under conditions which favor such losses (coarse textured soils, alkaline pH, respectively). Benefits from residual 15N may accrue in the year following application. Studies with controlled-release 15N-labelled sulfur coated urea (SCU) show benefits in situations such as paddy soils where losses from broadcast urea are a substantial problem. In experiments with 15N polyolefin-coated urea (POCU), rice plant recovery of broadcast conventional urea or ammonium salts ranged from 24 % with losses of 50-45 % with losses of 33 %. Where 15N labelled SCU or POCU was used, the rice recovery ranged from 26 % with losses of 14-72 % with losses of 10 %. Experiments using POCU with corn, barley and potato show similar results. The paucity of published data obtained using 15N points to the need for further studies that will provide concrete evidence for the development of innovative fertilizers with enhanced efficiency and an evidence-based set of recommendations for their selection and use. MenosSlow- and controlled-release N fertilizers are designed to increase efficiency and reduce N losses by better synchronizing N availability with plant demand. This paper reviews the use of 15N with these fertilizers to collect quantitative data on the efficiency, residual value and N losses for which relatively few data are available compared with conventional labelled urea and ammonium-based fertilizers. In general, studies of slow-release forms (isobutylidene diurea, oxamide, ureaform) with rice and upland crops show one or more benefits, including improved N uptake efficiency, and reduced N losses via leaching or NH3 volatilization under conditions which favor such losses (coarse textured soils, alkaline pH, respectively). Benefits from residual 15N may accrue in the year following application. Studies with controlled-release 15N-labelled sulfur coated urea (SCU) show benefits in situations such as paddy soils where losses from broadcast urea are a substantial problem. In experiments with 15N polyolefin-coated urea (POCU), rice plant recovery of broadcast conventional urea or ammonium salts ranged from 24 % with losses of 50-45 % with losses of 33 %. Where 15N labelled SCU or POCU was used, the rice recovery ranged from 26 % with losses of 14-72 % with losses of 10 %. Experiments using POCU with corn, barley and potato show similar results. The paucity of published data obtained using 15N points to the need for further studies that will provide concrete evidence for the dev... Mostrar Tudo |
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Palavras-Chave: |
Fertilizante de liberação lenta; Oxamida. |
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Thesagro: |
Fertilizante. |
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Thesaurus NAL: |
Fertilizers; Oxamide; Slow-release fertilizers. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02376naa a2200241 a 4500
001 2021723
005 2021-11-09
008 2015 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1007/s10705-015-9697-2$2DOI
100 1 $aCHALK, P. M.
245 $aFate and efficiency of 15 N-labelled slow- and controlled-release fertilizers.$h[electronic resource]
260 $c2015
520 $aSlow- and controlled-release N fertilizers are designed to increase efficiency and reduce N losses by better synchronizing N availability with plant demand. This paper reviews the use of 15N with these fertilizers to collect quantitative data on the efficiency, residual value and N losses for which relatively few data are available compared with conventional labelled urea and ammonium-based fertilizers. In general, studies of slow-release forms (isobutylidene diurea, oxamide, ureaform) with rice and upland crops show one or more benefits, including improved N uptake efficiency, and reduced N losses via leaching or NH3 volatilization under conditions which favor such losses (coarse textured soils, alkaline pH, respectively). Benefits from residual 15N may accrue in the year following application. Studies with controlled-release 15N-labelled sulfur coated urea (SCU) show benefits in situations such as paddy soils where losses from broadcast urea are a substantial problem. In experiments with 15N polyolefin-coated urea (POCU), rice plant recovery of broadcast conventional urea or ammonium salts ranged from 24 % with losses of 50-45 % with losses of 33 %. Where 15N labelled SCU or POCU was used, the rice recovery ranged from 26 % with losses of 14-72 % with losses of 10 %. Experiments using POCU with corn, barley and potato show similar results. The paucity of published data obtained using 15N points to the need for further studies that will provide concrete evidence for the development of innovative fertilizers with enhanced efficiency and an evidence-based set of recommendations for their selection and use.
650 $aFertilizers
650 $aOxamide
650 $aSlow-release fertilizers
650 $aFertilizante
653 $aFertilizante de liberação lenta
653 $aOxamida
700 1 $aCRASWELL, E. T.
700 1 $aPOLIDORO, J. C.
700 1 $aCHEN, D.
773 $tNutrient Cycling in Agroecosystems$gv. 102, n. 2, p. 167-178, Jun. 2015.
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Embrapa Solos (CNPS) |
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