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Registro Completo |
Biblioteca(s): |
Embrapa Pecuária Sul. |
Data corrente: |
02/12/2022 |
Data da última atualização: |
02/12/2022 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
KRAHL, G.; BALDISSERA, T. C.; PINTO, C. E.; GARAGORRY, F. C.; WERNER, S. S.; LOPES, C. F.; RIBEIRO FILHO, H. M. N. |
Afiliação: |
GUSTAVO KRAHL, University of the West of Santa Catarina; TIAGO CELSO BALDISSERA, Epagri - Company of Agricultural Research and Rural Extension of Santa Catarina; CASSIANO EDUARDO PINTO, Epagri - Company of Agricultural Research and Rural Extension of Santa Catarina; FABIO CERVO GARAGORRY, CPPSUL; SIMONE SILMARA WERNER, Epagri - Company of Agricultural Research and Rural Extension of Santa Catarina; CÁSSIO FELIPE LOPES, Santa Catarina State University; HENRIQUE MENDONÇA NUNES RIBEIRO FILHO, Santa Catarina State University. |
Título: |
Can pasture defoliation management targets be similarunder full sun and shaded conditions? |
Ano de publicação: |
2022 |
Fonte/Imprenta: |
Crop & Pasture Science, 21592, 31 Aug. 2022. |
Idioma: |
Inglês |
Notas: |
Online early. |
Conteúdo: |
Abstract Context: Defoliation management targets applied to forages under the full sun have not yet been properly evaluated for shaded environments such as occur in integrated crop?livestock systems with the presence of trees. Aims: This study aimed to determine defoliation targets under full sun and shaded environments for the shade-tolerant perennial summer grass hybrid Axonopus catharinensis (giant missionary grass), widely used in pasture systems of South Brazil and Argentina. Methods: Four pre-defoliation canopy heights (15, 25, 35 and 45 cm) and four defoliation severities (20%, 40%, 60% and 80% reduction in pre-defoliation canopy height) were evaluated. Plants were grown in 0.15 m3 wooden boxes filled with sand/vermiculite substrate (1:1 v/v) and irrigated with a complete nutrient solution. An artificial shade structure was made with wooden slats, reducing light intensity by 50% for shaded plants. Key results: Herbage accumulation decreased by 54% in shaded plants compared with those under full sun. Regardless of the light environment, the lowest crude protein content (<150 g/kg dry matter) and the highest neutral detergent fibre content (>650 g/kg dry matter) were observed when the defoliation target height was >35 cm. Both shaded and full sun environments showed decreases in tiller density when defoliation severity was >60% of pre-defoliation canopy heights. Conclusions: Pre-defoliation canopy heights >35 cm and defoliation severity >60% of pre-defoliation canopy height should be avoided when managing A. catharinensis, regardless of the light environment. Implications: Recommended targets may be easily implemented by livestock producers and are similar for full sun and shade environments. Keywords: Axonopus catharinensis Valls, canopy height, defoliation severity, defoliation target, herbage accumulation, integrated crop-livestock systems, tiller density. MenosAbstract Context: Defoliation management targets applied to forages under the full sun have not yet been properly evaluated for shaded environments such as occur in integrated crop?livestock systems with the presence of trees. Aims: This study aimed to determine defoliation targets under full sun and shaded environments for the shade-tolerant perennial summer grass hybrid Axonopus catharinensis (giant missionary grass), widely used in pasture systems of South Brazil and Argentina. Methods: Four pre-defoliation canopy heights (15, 25, 35 and 45 cm) and four defoliation severities (20%, 40%, 60% and 80% reduction in pre-defoliation canopy height) were evaluated. Plants were grown in 0.15 m3 wooden boxes filled with sand/vermiculite substrate (1:1 v/v) and irrigated with a complete nutrient solution. An artificial shade structure was made with wooden slats, reducing light intensity by 50% for shaded plants. Key results: Herbage accumulation decreased by 54% in shaded plants compared with those under full sun. Regardless of the light environment, the lowest crude protein content (<150 g/kg dry matter) and the highest neutral detergent fibre content (>650 g/kg dry matter) were observed when the defoliation target height was >35 cm. Both shaded and full sun environments showed decreases in tiller density when defoliation severity was >60% of pre-defoliation canopy heights. Conclusions: Pre-defoliation canopy heights >35 cm and defoliation severity >60% of pre-defoliation ca... Mostrar Tudo |
Thesagro: |
Altura; Desfolha; Integração; Pastagem. |
Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
Marc: |
LEADER 02619naa a2200253 a 4500 001 2149158 005 2022-12-02 008 2022 bl uuuu u00u1 u #d 100 1 $aKRAHL, G. 245 $aCan pasture defoliation management targets be similarunder full sun and shaded conditions?$h[electronic resource] 260 $c2022 500 $aOnline early. 520 $aAbstract Context: Defoliation management targets applied to forages under the full sun have not yet been properly evaluated for shaded environments such as occur in integrated crop?livestock systems with the presence of trees. Aims: This study aimed to determine defoliation targets under full sun and shaded environments for the shade-tolerant perennial summer grass hybrid Axonopus catharinensis (giant missionary grass), widely used in pasture systems of South Brazil and Argentina. Methods: Four pre-defoliation canopy heights (15, 25, 35 and 45 cm) and four defoliation severities (20%, 40%, 60% and 80% reduction in pre-defoliation canopy height) were evaluated. Plants were grown in 0.15 m3 wooden boxes filled with sand/vermiculite substrate (1:1 v/v) and irrigated with a complete nutrient solution. An artificial shade structure was made with wooden slats, reducing light intensity by 50% for shaded plants. Key results: Herbage accumulation decreased by 54% in shaded plants compared with those under full sun. Regardless of the light environment, the lowest crude protein content (<150 g/kg dry matter) and the highest neutral detergent fibre content (>650 g/kg dry matter) were observed when the defoliation target height was >35 cm. Both shaded and full sun environments showed decreases in tiller density when defoliation severity was >60% of pre-defoliation canopy heights. Conclusions: Pre-defoliation canopy heights >35 cm and defoliation severity >60% of pre-defoliation canopy height should be avoided when managing A. catharinensis, regardless of the light environment. Implications: Recommended targets may be easily implemented by livestock producers and are similar for full sun and shade environments. Keywords: Axonopus catharinensis Valls, canopy height, defoliation severity, defoliation target, herbage accumulation, integrated crop-livestock systems, tiller density. 650 $aAltura 650 $aDesfolha 650 $aIntegração 650 $aPastagem 700 1 $aBALDISSERA, T. C. 700 1 $aPINTO, C. E. 700 1 $aGARAGORRY, F. C. 700 1 $aWERNER, S. S. 700 1 $aLOPES, C. F. 700 1 $aRIBEIRO FILHO, H. M. N. 773 $tCrop & Pasture Science, 21592, 31 Aug. 2022.
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Embrapa Pecuária Sul (CPPSUL) |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
Data corrente: |
25/11/1999 |
Data da última atualização: |
08/02/2023 |
Autoria: |
FIGUEIREDO, F. J. C.; ROCHA NETO, O. G. da; CARVALHO, C. J. R. de. |
Afiliação: |
FRANCISCO JOSE CAMARA FIGUEIREDO, CPATU; OLINTO GOMES DA ROCHA NETO, CPATU; CLAUDIO JOSE REIS DE CARVALHO, CPATU. |
Título: |
Emergência de plântulas de cupuaçuzeiro oriundas de sementes submetidas a estresses térmicos. |
Ano de publicação: |
1998 |
Fonte/Imprenta: |
Belém, PA: Embrapa-CPATU, 1998. |
Páginas: |
39 p. |
Descrição Física: |
il. |
Série: |
(Embrapa-CPATU. Boletim de pesquisa, 202). |
Idioma: |
Português |
Conteúdo: |
O objetivo do trabalho foi o de estudar alguns aspectos fisiológicos da emergência de plântulas oriundas de sementes de cupuaçuzeiro, submetidas a estresses promovidos pela temperatura e umidade relativa do ar, e pelo tempo de exposição a essas condições. Por outro lado, a execução desta pesquisa foi apoiada na hipótese de que as sementes desta espécie perdem a viabilidade quando desidratadas a determinados níveis ou armazenadas a baixas termperaturas. |
Palavras-Chave: |
Belem; Brasil; Efeito da temperatura; Efeito da umidade; Efeito de Temperatura; Efeito de Umidade; Emergence; Geminação; Germinacao de semente; Mudas; Para; Plants; Seed; Teobroma grandiflorum; Therapy. |
Thesagro: |
Cupuaçu; Emergência; Fisiologia; Germinação; Planta; Plântula; Semente; Temperatura; Theobroma Grandiflorum; Tratamento; Umidade. |
Thesaurus NAL: |
Amazonia; germination; humidity; seedlings; seeds; temperature. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/32812/1/CPATU-BP202.pdf
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Marc: |
LEADER 01852nam a2200541 a 4500 001 1376727 005 2023-02-08 008 1998 bl uuuu u0uu1 u #d 100 1 $aFIGUEIREDO, F. J. C. 245 $aEmergência de plântulas de cupuaçuzeiro oriundas de sementes submetidas a estresses térmicos. 260 $aBelém, PA: Embrapa-CPATU$c1998 300 $a39 p.$cil. 490 $a(Embrapa-CPATU. Boletim de pesquisa, 202). 520 $aO objetivo do trabalho foi o de estudar alguns aspectos fisiológicos da emergência de plântulas oriundas de sementes de cupuaçuzeiro, submetidas a estresses promovidos pela temperatura e umidade relativa do ar, e pelo tempo de exposição a essas condições. Por outro lado, a execução desta pesquisa foi apoiada na hipótese de que as sementes desta espécie perdem a viabilidade quando desidratadas a determinados níveis ou armazenadas a baixas termperaturas. 650 $aAmazonia 650 $agermination 650 $ahumidity 650 $aseedlings 650 $aseeds 650 $atemperature 650 $aCupuaçu 650 $aEmergência 650 $aFisiologia 650 $aGerminação 650 $aPlanta 650 $aPlântula 650 $aSemente 650 $aTemperatura 650 $aTheobroma Grandiflorum 650 $aTratamento 650 $aUmidade 653 $aBelem 653 $aBrasil 653 $aEfeito da temperatura 653 $aEfeito da umidade 653 $aEfeito de Temperatura 653 $aEfeito de Umidade 653 $aEmergence 653 $aGeminação 653 $aGerminacao de semente 653 $aMudas 653 $aPara 653 $aPlants 653 $aSeed 653 $aTeobroma grandiflorum 653 $aTherapy 700 1 $aROCHA NETO, O. G. da 700 1 $aCARVALHO, C. J. R. de
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