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 | Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Oriental. Para informações adicionais entre em contato com cpatu.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
10/03/2017 |
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Data da última atualização: |
20/05/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
REICHERT, J. M.; RODRIGUES, M. F.; BERVALD, C. M. P.; KATO, O. R. |
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Afiliação: |
José Miguel Reichert, UFSM; Miriam Fernanda Rodrigues, UFSM; Clóvis Moisés Priebe Bervald, GSI Brazil; OSVALDO RYOHEI KATO, CPATU. |
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Título: |
Fire-free fallow management by mechanized chopping of biomass for sustainable agriculture in Eastern Amazon: effects on soil compactness, porosity, and water retention and availability. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Land Degradation & Development, v. 27, n. 5, p. 1403-1412, July 2016. |
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DOI: |
10.1002/ldr.2395 |
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Idioma: |
Inglês |
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Conteúdo: |
Many Amazon soils are naturally fragile and develop under intense rainfall and high temperature climate. Soil structural quality is improvable through vegetation management systems providing abundant soil mulch and little soil disturbance. We tested the effect of the chopping-and-mulching systems of secondary forest-vegetation on selected soil physical properties of a sandy Oxisol, located in the eastern Brazilian Amazon. The treatments consisted of two fallow forest-vegetation, namely, chop-and-mulch of secondary vegetation with a dual vertical-rotor chopper (VC) and with a horizontal-rotor chopper (HC) and a control composed of standing secondary forest-vegetation (SF). Six months after vegetation chopping, we evaluated soil bulk density (BD), degree-of-compactness (DC), pore-size distribution and soil hydraulic properties. Compared with SF, the VC and HC systems did not affect soil BD in surface layer (0·00?0·05 m) but increased BD in subsurface layers. DC in surface layer are below the range of the optimum values for most crops (77%?88%), while for other layers DC was within this optimum range. High macroporosity and sandy granulometry were responsible for high drainable water from soil saturation until field capacity, down to 0·20 m depth in all systems. Pore-size distribution was influenced by vegetation chopping with increase in smaller pores. These pores represent a small percentage of total porosity and contribute more to water retention and availability. Chopping by VC and HC mechanisms was effective in maintaining soil physical quality, characterized by lower soil bulk density, higher porosity and water retention, build up during growth of secondary vegetation in fallow period between cash crops. MenosMany Amazon soils are naturally fragile and develop under intense rainfall and high temperature climate. Soil structural quality is improvable through vegetation management systems providing abundant soil mulch and little soil disturbance. We tested the effect of the chopping-and-mulching systems of secondary forest-vegetation on selected soil physical properties of a sandy Oxisol, located in the eastern Brazilian Amazon. The treatments consisted of two fallow forest-vegetation, namely, chop-and-mulch of secondary vegetation with a dual vertical-rotor chopper (VC) and with a horizontal-rotor chopper (HC) and a control composed of standing secondary forest-vegetation (SF). Six months after vegetation chopping, we evaluated soil bulk density (BD), degree-of-compactness (DC), pore-size distribution and soil hydraulic properties. Compared with SF, the VC and HC systems did not affect soil BD in surface layer (0·00?0·05 m) but increased BD in subsurface layers. DC in surface layer are below the range of the optimum values for most crops (77%?88%), while for other layers DC was within this optimum range. High macroporosity and sandy granulometry were responsible for high drainable water from soil saturation until field capacity, down to 0·20 m depth in all systems. Pore-size distribution was influenced by vegetation chopping with increase in smaller pores. These pores represent a small percentage of total porosity and contribute more to water retention and availability... Mostrar Tudo |
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Palavras-Chave: |
Corte mecanizado; Propriedades físicas do solo. |
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Thesagro: |
Agricultura Sustentável; Biomassa; Floresta; Vegetação Secundária. |
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Thesaurus Nal: |
Amazonia. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 02622naa a2200253 a 4500
001 2066722
005 2022-05-20
008 2016 bl uuuu u00u1 u #d
024 7 $a10.1002/ldr.2395$2DOI
100 1 $aREICHERT, J. M.
245 $aFire-free fallow management by mechanized chopping of biomass for sustainable agriculture in Eastern Amazon$beffects on soil compactness, porosity, and water retention and availability.$h[electronic resource]
260 $c2016
520 $aMany Amazon soils are naturally fragile and develop under intense rainfall and high temperature climate. Soil structural quality is improvable through vegetation management systems providing abundant soil mulch and little soil disturbance. We tested the effect of the chopping-and-mulching systems of secondary forest-vegetation on selected soil physical properties of a sandy Oxisol, located in the eastern Brazilian Amazon. The treatments consisted of two fallow forest-vegetation, namely, chop-and-mulch of secondary vegetation with a dual vertical-rotor chopper (VC) and with a horizontal-rotor chopper (HC) and a control composed of standing secondary forest-vegetation (SF). Six months after vegetation chopping, we evaluated soil bulk density (BD), degree-of-compactness (DC), pore-size distribution and soil hydraulic properties. Compared with SF, the VC and HC systems did not affect soil BD in surface layer (0·00?0·05 m) but increased BD in subsurface layers. DC in surface layer are below the range of the optimum values for most crops (77%?88%), while for other layers DC was within this optimum range. High macroporosity and sandy granulometry were responsible for high drainable water from soil saturation until field capacity, down to 0·20 m depth in all systems. Pore-size distribution was influenced by vegetation chopping with increase in smaller pores. These pores represent a small percentage of total porosity and contribute more to water retention and availability. Chopping by VC and HC mechanisms was effective in maintaining soil physical quality, characterized by lower soil bulk density, higher porosity and water retention, build up during growth of secondary vegetation in fallow period between cash crops.
650 $aAmazonia
650 $aAgricultura Sustentável
650 $aBiomassa
650 $aFloresta
650 $aVegetação Secundária
653 $aCorte mecanizado
653 $aPropriedades físicas do solo
700 1 $aRODRIGUES, M. F.
700 1 $aBERVALD, C. M. P.
700 1 $aKATO, O. R.
773 $tLand Degradation & Development$gv. 27, n. 5, p. 1403-1412, July 2016.
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Embrapa Amazônia Oriental (CPATU) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Soja. Para informações adicionais entre em contato com valeria.cardoso@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
25/09/2000 |
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Data da última atualização: |
09/03/2006 |
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Autoria: |
SUJII, E. R.; SOSA-GOMEZ, D.R.; CARVALHO, V. A. M. de; TIGANO, M. S. |
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Título: |
Integrated system to simulate the impact of the fungus nomuraea rileyi on Brazilian anticarsia gemmatalis populations. |
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Ano de publicação: |
2000 |
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Fonte/Imprenta: |
In: INTERNATIONAL CONGRESS OF ENTOMOLOGY, 21., 2000, Foz do Iguassu. Abstracts... Londrina: Embrapa Soja, 2000. |
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Volume: |
v.1 |
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Páginas: |
p.543. |
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Idioma: |
Inglês |
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Conteúdo: |
The fungus Nomuraea rileyi is known as an important biological agent of Anticarsia gemmatalis (Lepidoptera: Noctuidae), a key soybean pest in Brazil. N. rileyi can prevent A. gemmatalis populations from reaching economic threshold levels in soybean, and consequently avoid the use of chemical insecticide applications against this pest. Little is known about the evolution of this disease on A. gemmatalis population dynamics. An integrated system of mathematical models has been developed, using the software "STELLA version 5.0 research", to simulate the pest population dynamics and the progress of the disease caused by N. rileyi. The system integrates a model of N. rileyilA. gemmatalis interactions, developed in Florida, USA, and a Brazilian model for A. gemmatalis dynamics. The precision of the system has been improved by the introduction of data related to infection and conidiation of N. rileyi on A. gemmatalis at Brazilian conditions. The input of climatic conditions, host population and soybean variety is required for simulations. The system generantes a curve of A. gemmatalis caterpillars population based on the estimation of N. rileyi conidial density and infection rates. The generated data compared to the field data shows that the system developed can mimicry the N. rileyi/A.gemmatalis interactions. However, further studies on environmental factors affecting migration rates of the insect, N. rileyi conidiogenesis dynamics and conidial survivorship, are still needed to improve the precision of the model for the use on A. gemmatalis management. MenosThe fungus Nomuraea rileyi is known as an important biological agent of Anticarsia gemmatalis (Lepidoptera: Noctuidae), a key soybean pest in Brazil. N. rileyi can prevent A. gemmatalis populations from reaching economic threshold levels in soybean, and consequently avoid the use of chemical insecticide applications against this pest. Little is known about the evolution of this disease on A. gemmatalis population dynamics. An integrated system of mathematical models has been developed, using the software "STELLA version 5.0 research", to simulate the pest population dynamics and the progress of the disease caused by N. rileyi. The system integrates a model of N. rileyilA. gemmatalis interactions, developed in Florida, USA, and a Brazilian model for A. gemmatalis dynamics. The precision of the system has been improved by the introduction of data related to infection and conidiation of N. rileyi on A. gemmatalis at Brazilian conditions. The input of climatic conditions, host population and soybean variety is required for simulations. The system generantes a curve of A. gemmatalis caterpillars population based on the estimation of N. rileyi conidial density and infection rates. The generated data compared to the field data shows that the system developed can mimicry the N. rileyi/A.gemmatalis interactions. However, further studies on environmental factors affecting migration rates of the insect, N. rileyi conidiogenesis dynamics and conidial survivorship, are still needed to im... Mostrar Tudo |
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Palavras-Chave: |
Brasil; Dinamica da populacao; Manejo de praga; Pest insects. |
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Thesagro: |
Controle Biológico; Inseto. |
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Thesaurus NAL: |
biological control; Brazil; Insecta; pest management; population dynamics. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02503naa a2200313 a 4500
001 1462258
005 2006-03-09
008 2000 bl uuuu u00u1 u #d
100 1 $aSUJII, E. R.
245 $aIntegrated system to simulate the impact of the fungus nomuraea rileyi on Brazilian anticarsia gemmatalis populations.
260 $c2000
300 $ap.543. v.1
490 $vv.1
520 $aThe fungus Nomuraea rileyi is known as an important biological agent of Anticarsia gemmatalis (Lepidoptera: Noctuidae), a key soybean pest in Brazil. N. rileyi can prevent A. gemmatalis populations from reaching economic threshold levels in soybean, and consequently avoid the use of chemical insecticide applications against this pest. Little is known about the evolution of this disease on A. gemmatalis population dynamics. An integrated system of mathematical models has been developed, using the software "STELLA version 5.0 research", to simulate the pest population dynamics and the progress of the disease caused by N. rileyi. The system integrates a model of N. rileyilA. gemmatalis interactions, developed in Florida, USA, and a Brazilian model for A. gemmatalis dynamics. The precision of the system has been improved by the introduction of data related to infection and conidiation of N. rileyi on A. gemmatalis at Brazilian conditions. The input of climatic conditions, host population and soybean variety is required for simulations. The system generantes a curve of A. gemmatalis caterpillars population based on the estimation of N. rileyi conidial density and infection rates. The generated data compared to the field data shows that the system developed can mimicry the N. rileyi/A.gemmatalis interactions. However, further studies on environmental factors affecting migration rates of the insect, N. rileyi conidiogenesis dynamics and conidial survivorship, are still needed to improve the precision of the model for the use on A. gemmatalis management.
650 $abiological control
650 $aBrazil
650 $aInsecta
650 $apest management
650 $apopulation dynamics
650 $aControle Biológico
650 $aInseto
653 $aBrasil
653 $aDinamica da populacao
653 $aManejo de praga
653 $aPest insects
700 1 $aSOSA-GOMEZ, D.R.
700 1 $aCARVALHO, V. A. M. de
700 1 $aTIGANO, M. S.
773 $tIn: INTERNATIONAL CONGRESS OF ENTOMOLOGY, 21., 2000, Foz do Iguassu. Abstracts... Londrina: Embrapa Soja, 2000.
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