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Registro Completo |
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
04/11/2020 |
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Data da última atualização: |
20/07/2021 |
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Tipo da produção científica: |
Capítulo em Livro Técnico-Científico |
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Autoria: |
COSTA, T. C. e C. da; CAMPANHA, M. M.; FRANÇA, L. F.; GONTIJO NETO, M. M.; CASTRO, R. V. de O.; SANTOS, T. H. P. dos; VIEIRA, R. da S. |
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Afiliação: |
THOMAZ CORREA E CASTRO DA COSTA, CNPMS; MONICA MATOSO CAMPANHA, CNPMS; Luiz Fernando França; MIGUEL MARQUES GONTIJO NETO, CNPMS; Renato Vinícius de Oliveira Castro; Thiago Herique Prates dos Santos; Renato da Silva Vieira. |
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Título: |
CalcMadeira: cálculo de peças de madeira roliça e serada. |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
In: OLIVEIRA, R. J. de (Org.). Engenharia florestal: desafios, limites e potencialidade. Rio de Janeiro: Científica, 2020. |
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Páginas: |
p. 205-223. |
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DOI: |
10.37885/200600517 |
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Idioma: |
Português |
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Conteúdo: |
O comércio de madeira não processada estabelece o preço em volume (metros cúbicos ou estéreo) e o produtor, ao vender suas árvores, pela dificuldade em estimar produtos madeireiros, não sabe quantas peças podem ser beneficiadas, no caso de madeira roliça ou serrada. Para obter esta informação foi desenvolvido um software web para calcular peças de madeira roliça e serrada que um conjunto de árvores ou toras individuais pode fornecer. O usuário pode informar as dimensões em largura e espessura, por intervalo ou fixas. Os cálculos são realizados por meio de funções dendrométricas e relações trigonométricas. Para madeira serrada foram implementados 6 modelos de padrão de corte, com a opção de cálculo de receita das peças. Os potenciais usuários são produtores rurais e empresas que plantam florestas, e empresas de desdobro da madeira (serrarias). |
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Palavras-Chave: |
Floresta plantada; Mensuração florestal; Multiproduto florestal. |
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Thesagro: |
Floresta; Serraria. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/217454/1/CalcMadeira.pdf
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Marc: |
LEADER 01757naa a2200277 a 4500
001 2126281
005 2021-07-20
008 2020 bl uuuu u00u1 u #d
024 7 $a10.37885/200600517$2DOI
100 1 $aCOSTA, T. C. e C. da
245 $aCalcMadeira$bcálculo de peças de madeira roliça e serada.$h[electronic resource]
260 $c2020
300 $ap. 205-223.
520 $aO comércio de madeira não processada estabelece o preço em volume (metros cúbicos ou estéreo) e o produtor, ao vender suas árvores, pela dificuldade em estimar produtos madeireiros, não sabe quantas peças podem ser beneficiadas, no caso de madeira roliça ou serrada. Para obter esta informação foi desenvolvido um software web para calcular peças de madeira roliça e serrada que um conjunto de árvores ou toras individuais pode fornecer. O usuário pode informar as dimensões em largura e espessura, por intervalo ou fixas. Os cálculos são realizados por meio de funções dendrométricas e relações trigonométricas. Para madeira serrada foram implementados 6 modelos de padrão de corte, com a opção de cálculo de receita das peças. Os potenciais usuários são produtores rurais e empresas que plantam florestas, e empresas de desdobro da madeira (serrarias).
650 $aFloresta
650 $aSerraria
653 $aFloresta plantada
653 $aMensuração florestal
653 $aMultiproduto florestal
700 1 $aCAMPANHA, M. M.
700 1 $aFRANÇA, L. F.
700 1 $aGONTIJO NETO, M. M.
700 1 $aCASTRO, R. V. de O.
700 1 $aSANTOS, T. H. P. dos
700 1 $aVIEIRA, R. da S.
773 $tIn: OLIVEIRA, R. J. de (Org.). Engenharia florestal: desafios, limites e potencialidade. Rio de Janeiro: Científica, 2020.
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Embrapa Milho e Sorgo (CNPMS) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Milho e Sorgo. Para informações adicionais entre em contato com cnpms.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
23/09/2020 |
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Data da última atualização: |
26/10/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
MOURA, M. S. de; SILVA, B. M.; MOTA, P. K.; BORGHI, E.; RESENDE, A. V. de; ACUNA-GUZMAN, S. F.; ARAUJO, G. S. S.; SILVA, L. de C. M. da; OLIVEIRA, G. C. de; CURI, N. |
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Afiliação: |
Maíse Soares de Moura, Universidade Federal de São João del-Rei; Bruno Montoani Silva, Universidade Federal de Lavras; Paula Karen Mota, Universidade Federal de São João del-Rei; EMERSON BORGHI, CNPMS; ALVARO VILELA DE RESENDE, CNPMS; Salvador Francisco Acuna-Guzman, Center for Engineering and Industrial Development, Querétaro, Mexico; Gabriela Soares Santos Araújo, Universidade Federal de São João del-Rei; Lucas de Castro Moreira da Silva, Universidade Federal de Lavras; Geraldo César de Oliveira, Universidade Federal de Lavras; Nilton Curi, Universidade Federal de Lavras. |
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Título: |
Soil management and diverse crop rotation can mitigate early-stage no-till compaction and improve least limiting water range in a Ferralsol. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Agricultural Water Management, v. 243, 106523, 2021. |
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Idioma: |
Inglês |
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Conteúdo: |
No-till management systems tend to cause soil compaction in the early years of their establishment. Soil compaction reduces crop production due to restrictions on root development. Management strategies combining crop rotation and soil conservation practices still need to be researched as potential strategies to mitigate no-till soil physical constraints in tropical regions with prolonged drought periods and still promote agricultural sustainability. The objective of this study was to determine if soil specific management could mitigate early-stage no-till compaction and improve least limiting water range in a Rhodic Ferralsol. We hypothesized that no-till cropping systems with concomitant conservation practices ?soil fertilization, crop rotation, and intercropped brachiaria grass? would improve soil physical quality (SPQ) and still achieve high crop yields in a tropical region with dry winters and frequent dry spells during wet season. Six no-till cropping systems were tested: soybean monoculture (T1); corn monoculture (T2); corn and soybean rotation (T3); corn and soybean rotation with intercropped brachiaria (T4); and two more with increased fertilization: corn and soybean rotation with intercropped brachiaria (T5), and corn and soybean rotation (T6). Least limiting water range (LLWR) was used as an indicator of SPQ. LLWR is computed as a function of bulk density (Bd), and it is defined as the range of soil water content in which physical constraints to plant growth are at minimal. Its critical limits are water contents associated with field capacity and air-filled porosity (upper limits), along with wilting point and soil resistance (lower limits). For each Bd, there is a LLWR value: the span between the upper limit and the lower limit. An adaptation of LLWR, in which we substituted the wilting point by the critical water content (θ*), was also tested (LLWR*). Critical Bd (BdC) value was 1.30 Mg m− 3 for LLWR and LLWR*. In monoculture treatments (T1 and T2) the maximum Bd values exceeded the BdC (LLWR = LLWR * = 0) and negatively correlated with crop yield. Alternatively, cropping systems with diverse crop rotation (corn/soybean/brachiaria) showed greater values of LLWR and LLWR* and less soil compaction than monoculture systems. Usage of LLWR* evinced water stress was the main limiting plant growth factor; viz. θ* was more limiting than mechanical resistance and deficient aeration. These results support the hypothesis that the use of soil conservation practices and crop rotation during initial years of no-till farming contributes favorably to SPQ without compromising crop production. MenosNo-till management systems tend to cause soil compaction in the early years of their establishment. Soil compaction reduces crop production due to restrictions on root development. Management strategies combining crop rotation and soil conservation practices still need to be researched as potential strategies to mitigate no-till soil physical constraints in tropical regions with prolonged drought periods and still promote agricultural sustainability. The objective of this study was to determine if soil specific management could mitigate early-stage no-till compaction and improve least limiting water range in a Rhodic Ferralsol. We hypothesized that no-till cropping systems with concomitant conservation practices ?soil fertilization, crop rotation, and intercropped brachiaria grass? would improve soil physical quality (SPQ) and still achieve high crop yields in a tropical region with dry winters and frequent dry spells during wet season. Six no-till cropping systems were tested: soybean monoculture (T1); corn monoculture (T2); corn and soybean rotation (T3); corn and soybean rotation with intercropped brachiaria (T4); and two more with increased fertilization: corn and soybean rotation with intercropped brachiaria (T5), and corn and soybean rotation (T6). Least limiting water range (LLWR) was used as an indicator of SPQ. LLWR is computed as a function of bulk density (Bd), and it is defined as the range of soil water content in which physical constraints to plant growth are a... Mostrar Tudo |
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Thesagro: |
Manejo do Solo; Plantio Direto; Rotação de Cultura. |
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Thesaurus NAL: |
Crop rotation. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 03506naa a2200277 a 4500
001 2125077
005 2020-10-26
008 2021 bl uuuu u00u1 u #d
100 1 $aMOURA, M. S. de
245 $aSoil management and diverse crop rotation can mitigate early-stage no-till compaction and improve least limiting water range in a Ferralsol.$h[electronic resource]
260 $c2021
520 $aNo-till management systems tend to cause soil compaction in the early years of their establishment. Soil compaction reduces crop production due to restrictions on root development. Management strategies combining crop rotation and soil conservation practices still need to be researched as potential strategies to mitigate no-till soil physical constraints in tropical regions with prolonged drought periods and still promote agricultural sustainability. The objective of this study was to determine if soil specific management could mitigate early-stage no-till compaction and improve least limiting water range in a Rhodic Ferralsol. We hypothesized that no-till cropping systems with concomitant conservation practices ?soil fertilization, crop rotation, and intercropped brachiaria grass? would improve soil physical quality (SPQ) and still achieve high crop yields in a tropical region with dry winters and frequent dry spells during wet season. Six no-till cropping systems were tested: soybean monoculture (T1); corn monoculture (T2); corn and soybean rotation (T3); corn and soybean rotation with intercropped brachiaria (T4); and two more with increased fertilization: corn and soybean rotation with intercropped brachiaria (T5), and corn and soybean rotation (T6). Least limiting water range (LLWR) was used as an indicator of SPQ. LLWR is computed as a function of bulk density (Bd), and it is defined as the range of soil water content in which physical constraints to plant growth are at minimal. Its critical limits are water contents associated with field capacity and air-filled porosity (upper limits), along with wilting point and soil resistance (lower limits). For each Bd, there is a LLWR value: the span between the upper limit and the lower limit. An adaptation of LLWR, in which we substituted the wilting point by the critical water content (θ*), was also tested (LLWR*). Critical Bd (BdC) value was 1.30 Mg m− 3 for LLWR and LLWR*. In monoculture treatments (T1 and T2) the maximum Bd values exceeded the BdC (LLWR = LLWR * = 0) and negatively correlated with crop yield. Alternatively, cropping systems with diverse crop rotation (corn/soybean/brachiaria) showed greater values of LLWR and LLWR* and less soil compaction than monoculture systems. Usage of LLWR* evinced water stress was the main limiting plant growth factor; viz. θ* was more limiting than mechanical resistance and deficient aeration. These results support the hypothesis that the use of soil conservation practices and crop rotation during initial years of no-till farming contributes favorably to SPQ without compromising crop production.
650 $aCrop rotation
650 $aManejo do Solo
650 $aPlantio Direto
650 $aRotação de Cultura
700 1 $aSILVA, B. M.
700 1 $aMOTA, P. K.
700 1 $aBORGHI, E.
700 1 $aRESENDE, A. V. de
700 1 $aACUNA-GUZMAN, S. F.
700 1 $aARAUJO, G. S. S.
700 1 $aSILVA, L. de C. M. da
700 1 $aOLIVEIRA, G. C. de
700 1 $aCURI, N.
773 $tAgricultural Water Management$gv. 243, 106523, 2021.
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