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Registro Completo |
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
08/02/2017 |
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Data da última atualização: |
10/11/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
CEDDIA, M. B.; GOMES, A. S.; VASQUES, G. M.; PINHEIRO, E. F. M. |
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Afiliação: |
MARCOS BACIS CEDDIA, UFRRJ; ANDRÉA S. GOMES, UFRRJ; GUSTAVO DE MATTOS VASQUES, CNPS; ÉRIKA F. M. PINHEIRO, UFRRJ. |
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Título: |
Soil carbon stock and particle size fractions in the Central Amazon predicted from remotely sensed relief, multispectral and radar data. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Remote Sensing, v. 9, n. 2, Feb. 2017. |
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DOI: |
https://doi.org/10.3390/rs9020124 |
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Idioma: |
Inglês |
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Conteúdo: |
Soils from the remote areas of the Amazon Rainforest in Brazil are poorly mapped due to the presence of dense forest and lack of access routes. The use of covariates derived from multispectral and radar remote sensors allows mapping large areas and has the potential to improve the accuracy of soil attribute maps. The objectives of this study were to: (a) evaluate the addition of relief, and vegetation covariates derived from multispectral images with distinct spatial and spectral resolutions (Landsat 8 and RapidEye) and L-band radar (ALOS PALSAR) for the prediction of soil organic carbon stock (CS) and particle size fractions; and (b) evaluate the performance of four geostatistical methods to map these soil properties. Overall, the results show that, even under forest coverage, the Normalized Difference Vegetation Index (NDVI) and ALOS PALSAR backscattering coefficient improved the accuracy of CS and subsurface clay content predictions. The NDVI derived from RapidEye sensor improved the prediction of CS using isotopic cokriging, while the NDVI derived from Landsat 8 and backscattering coefficient were selected to predict clay content at the subsurface using regression kriging (RK). The relative improvement of applying cokriging and RK over ordinary kriging were lower than 10%, indicating that further analyses are necessary to connect soil proxies (vegetation and relief types) with soil attributes |
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Palavras-Chave: |
Geoestatística; Krigagem; Mapeamento digital do solo. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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URL: |
https://www.alice.cnptia.embrapa.br/alice/bitstream/doc/1063163/1/2016153.pdf
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Marc: |
null
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Registro original: |
Embrapa Solos (CNPS) |
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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: |
03/03/2011 |
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Data da última atualização: |
21/03/2025 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
VIEIRA, S. S.; BUENO, A. F.; BOFF, M. I. C.; BUENO, R. C. O. F.; HOFFMAN-CAMPO, C. B. |
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Afiliação: |
S. S. VIEIRA, UDESC/CAV; ADENEY DE FREITAS BUENO, CNPSO; M. I. C. BOFF, UDESC/CAV; REGIANE C. O. F. BUENO, FESURV; CLARA BEATRIZ HOFFMANN CAMPO, CNPSO. |
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Título: |
Resistance of soybean genotypes to Bemisia tabaci (Genn.) biotype B (Hemiptera: Aleyrodidae). |
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Ano de publicação: |
2011 |
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Fonte/Imprenta: |
Neotropical Entomology, v. 40, n. 1, p. 117-122, Jan./Feb. 2011. |
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DOI: |
10.1590/S1519-566X2011000100018 |
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Idioma: |
Inglês |
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Conteúdo: |
The silverleaf whitefly Bemisia tabaci (Genn.) biotype B has become a serious problem for soybean cultivation because it can significantly reduce soybean productivity. The use of soybean cultivars resistant to whitefly attack is an important strategy in an integrated pest management (IPM) program. This study evaluated the preference for oviposition and colonization by B. tabaci biotype B on different soybean genotypes. In the free-choice test, the genotypes studied were ?IAC 17? and ?IAC 19? as the standards for resistance and ?IAC Holambra Stwart? as the standard for susceptibility, as well as BABR01-0492, BABR01-0173, BABR01-1259, BABR01-1576, BABR99-4021HC, BABR99-4021HP, ?Barreiras?, ?Conquista?, ?Corisco?, ?BRS Gralha?, PI274454, PI227687, and PI171451. In the no-choice test, the four best genotypes selected in the free-choice test, in addition to the susceptible and resistant standards were evaluated. Our data indicated ?Barreiras? as the most resistant genotype against B. tabaci biotype B. ?BRS Gralha?, which was the least attractive to whitefly adults in the free-choice test, did not show resistance to insect attack when they were confined in cages in the no-choice test. Despite the high number of eggs observed, BABR01-1576 and BABR99-4021HC showed a reduced number of nymphs, indicating antibiosis. The genotypes with a high level of resistance can be used as a tool against B. tabaci in IPM or as a source of resistance in plantbreeding programs. |
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Thesagro: |
Praga de planta; Soja. |
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Thesaurus NAL: |
Plant pests; Soybeans. |
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Categoria do assunto: |
O Insetos e Entomologia |
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Marc: |
null
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Registro original: |
Embrapa Soja (CNPSO) |
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