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Registro Completo |
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
07/02/2017 |
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Data da última atualização: |
03/11/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
BRIEDIS, C.; SA, J. C. de M.; LAL, R.; TIVET, F.; FERREIRA, A. de O.; FRANCHINI, J. C.; SCHIMIGUEL, R.; HARTMAN, D. da C.; SANTOS, J. Z. dos. |
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Afiliação: |
CLEVER BRIEDIS, UEPG; JOÃO CARLOS DE MORAES SÁ, UEPG; RATTAN LAL, Ohio State University; FLORENT TIVET, CIRAD; ADEMIR DE OLIVEIRA FERREIRA, UEPG; JULIO CEZAR FRANCHINI DOS SANTOS, CNPSO; RAFAEL SCHIMIGUEL, UEPG; DAIANI DA CRUZ HARTMAN, UEPG. |
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Título: |
Can highly weathered soils under conservation agriculture be C saturated?. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Catena, [S. l.], v. 147, p. 638-649, Dec. 2016. |
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DOI: |
10.1016/j.catena.2016.08.021 |
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Idioma: |
Inglês |
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Conteúdo: |
Soil organic carbon (SOC) plays an essential function in global agroecosystems. Conservation agriculture (CA) associated with diverse and high C-input is an important tool to increase SOC, improve soil quality, and increase agronomic productivity. However, the information about the potential of highly weathered soils under CA to accumulate SOC, and when the SOC saturation may occur, is scarce. This study was based on the hypothesis that in highly weathered soil from tropical and subtropical agro-ecosystems, the potential to store SOC lies more in the sub-soil than in surface layers and is determined by nutrient scarcity. Thus, the aim of this study, performed in a long-term incubation experiment (30 months), was to: (i) assess the SOC flow and mineralization based on CO2-C emissions for estimating SOC accumulation; (ii) evaluate the impact of nutrient scarcity on C accumulation efficiency by soil layers; and (iii) determine when C saturation occurs in these soils. The incubation study was performed in three Brazilian Oxisols under long-term CA, and was comprised of four amounts of C-inputs (0, 6, 12 and 24 Mg C ha? 1) added at 0, 10 and 20-months to three soil layers (0–20, 20–40 and 40–100 cm). The CO2-C emission was 19.0, 9.0 and 7.0% higher in the 0–20 cm than that in 40–100 cm layer for Ponta Grossa, Londrina and Lucas do Rio Verde sites, respectively, which was associated with higher antecedent SOC content and fertility status. A higher SOC accumulation efficiency was observed for the 0–20 cm layer than in deeper layers. Nutrient scarcity in deep soil layers; especially that of P, Ca2 + and Mg2 +; was the driving force limiting SOC accumulation. Carbon saturation was not achieved indicating a high SOC storage capacity in these soils. Because these and similar soils cover a large global area, they possess a large C sink to mitigate atmospheric CO2-C. The potential SOC storage estimated for 20–100 cm layer based on this study and upscaling for 1/3 Brazilian Oxisols (100 million ha) may offset 0.06 to 0.36 Pg C yr? 1 or 5.5% to 32.7% of the global annual greenhouse gas emissions by land use change. MenosSoil organic carbon (SOC) plays an essential function in global agroecosystems. Conservation agriculture (CA) associated with diverse and high C-input is an important tool to increase SOC, improve soil quality, and increase agronomic productivity. However, the information about the potential of highly weathered soils under CA to accumulate SOC, and when the SOC saturation may occur, is scarce. This study was based on the hypothesis that in highly weathered soil from tropical and subtropical agro-ecosystems, the potential to store SOC lies more in the sub-soil than in surface layers and is determined by nutrient scarcity. Thus, the aim of this study, performed in a long-term incubation experiment (30 months), was to: (i) assess the SOC flow and mineralization based on CO2-C emissions for estimating SOC accumulation; (ii) evaluate the impact of nutrient scarcity on C accumulation efficiency by soil layers; and (iii) determine when C saturation occurs in these soils. The incubation study was performed in three Brazilian Oxisols under long-term CA, and was comprised of four amounts of C-inputs (0, 6, 12 and 24 Mg C ha? 1) added at 0, 10 and 20-months to three soil layers (0–20, 20–40 and 40–100 cm). The CO2-C emission was 19.0, 9.0 and 7.0% higher in the 0–20 cm than that in 40–100 cm layer for Ponta Grossa, Londrina and Lucas do Rio Verde sites, respectively, which was associated with higher antecedent SOC content and fertility status. A higher SOC accumulation efficiency was o... Mostrar Tudo |
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Thesagro: |
Conservação do solo; Oxisol. |
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Thesaurus Nal: |
Soil organic carbon. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02913naa a2200265 a 4500
001 2062973
005 2017-11-03
008 2016 bl uuuu u00u1 u #d
024 7 $a10.1016/j.catena.2016.08.021$2DOI
100 1 $aBRIEDIS, C.
245 $aCan highly weathered soils under conservation agriculture be C saturated?.$h[electronic resource]
260 $c2016
520 $aSoil organic carbon (SOC) plays an essential function in global agroecosystems. Conservation agriculture (CA) associated with diverse and high C-input is an important tool to increase SOC, improve soil quality, and increase agronomic productivity. However, the information about the potential of highly weathered soils under CA to accumulate SOC, and when the SOC saturation may occur, is scarce. This study was based on the hypothesis that in highly weathered soil from tropical and subtropical agro-ecosystems, the potential to store SOC lies more in the sub-soil than in surface layers and is determined by nutrient scarcity. Thus, the aim of this study, performed in a long-term incubation experiment (30 months), was to: (i) assess the SOC flow and mineralization based on CO2-C emissions for estimating SOC accumulation; (ii) evaluate the impact of nutrient scarcity on C accumulation efficiency by soil layers; and (iii) determine when C saturation occurs in these soils. The incubation study was performed in three Brazilian Oxisols under long-term CA, and was comprised of four amounts of C-inputs (0, 6, 12 and 24 Mg C ha? 1) added at 0, 10 and 20-months to three soil layers (0–20, 20–40 and 40–100 cm). The CO2-C emission was 19.0, 9.0 and 7.0% higher in the 0–20 cm than that in 40–100 cm layer for Ponta Grossa, Londrina and Lucas do Rio Verde sites, respectively, which was associated with higher antecedent SOC content and fertility status. A higher SOC accumulation efficiency was observed for the 0–20 cm layer than in deeper layers. Nutrient scarcity in deep soil layers; especially that of P, Ca2 + and Mg2 +; was the driving force limiting SOC accumulation. Carbon saturation was not achieved indicating a high SOC storage capacity in these soils. Because these and similar soils cover a large global area, they possess a large C sink to mitigate atmospheric CO2-C. The potential SOC storage estimated for 20–100 cm layer based on this study and upscaling for 1/3 Brazilian Oxisols (100 million ha) may offset 0.06 to 0.36 Pg C yr? 1 or 5.5% to 32.7% of the global annual greenhouse gas emissions by land use change.
650 $aSoil organic carbon
650 $aConservação do solo
650 $aOxisol
700 1 $aSA, J. C. de M.
700 1 $aLAL, R.
700 1 $aTIVET, F.
700 1 $aFERREIRA, A. de O.
700 1 $aFRANCHINI, J. C.
700 1 $aSCHIMIGUEL, R.
700 1 $aHARTMAN, D. da C.
700 1 $aSANTOS, J. Z. dos
773 $tCatena, [S. l.]$gv. 147, p. 638-649, Dec. 2016.
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Registro original: |
Embrapa Soja (CNPSO) |
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Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
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Registro Completo
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
04/12/2018 |
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Data da última atualização: |
04/12/2018 |
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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: |
BALATE, C. A; SOUZA, D. C. de; RESENDE, L. V.; FREITAS, S. T. de. |
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Afiliação: |
CARLOS AGOSTINHO BALATE, Instituto Superior Politécnico de Gaza, Chokwé, Gaza, Moçambique; DOUGLAS CORREA DE SOUZA, Universidade Federal de Lavras; LUCIANE VILELA RESENDE, Universidade Federal de Lavras; SERGIO TONETTO DE FREITAS, CPATSA. |
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Título: |
Effect of abscisic acid on the calcium content for controlling blossom-end rot in tomato under water stress. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Pesquisa Agropecuária Tropical, v. 48, n. 4, p. 414-419, oct./dec. 2018. |
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Idioma: |
Inglês |
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Conteúdo: |
Water stress in tomato plants may cause the incidence of blossom-end rot. This study aimed to analyze the effect of abscisic acid leaf application for increasing the calcium uptake in irrigated tomato (?Santa Clara? cultivar) in the field, as a possible mechanism of blossom-end rot inhibition. The treatments consisted of four irrigation levels (25 %, 50 %, 75 % and 100 % of the crop water requirements to fulfil the crop evapotranspiration) and two abscisic acid doses (0 mg L-1 and 500 mg L-1). The fruits were harvested at 15 and 30 days after the anthesis and evaluated for calcium content and percentage of blossom-end rot. The application of abscisic acid increased the calcium partition to the distal region of the fruits at 30 days after the beginning of flowering, as well as reduced the incidence of blossom-end rot by 86 %, when compared with plants not treated with abscisic acid. It is possible to conclude that the foliar application of abscisic acid can significantly reduce the incidence of blossom-end rot. |
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Palavras-Chave: |
Fito-hormônios; Mecanismo de defesa vegetal. |
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Thesagro: |
Ácido Abscisico; Cálcio; Tomate. |
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Thesaurus NAL: |
Solanum lycopersicum; Tomatoes. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/187705/1/Sergio-5.pdf
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Marc: |
LEADER 01767naa a2200241 a 4500
001 2100690
005 2018-12-04
008 2018 bl uuuu u00u1 u #d
100 1 $aBALATE, C. A
245 $aEffect of abscisic acid on the calcium content for controlling blossom-end rot in tomato under water stress.$h[electronic resource]
260 $c2018
520 $aWater stress in tomato plants may cause the incidence of blossom-end rot. This study aimed to analyze the effect of abscisic acid leaf application for increasing the calcium uptake in irrigated tomato (?Santa Clara? cultivar) in the field, as a possible mechanism of blossom-end rot inhibition. The treatments consisted of four irrigation levels (25 %, 50 %, 75 % and 100 % of the crop water requirements to fulfil the crop evapotranspiration) and two abscisic acid doses (0 mg L-1 and 500 mg L-1). The fruits were harvested at 15 and 30 days after the anthesis and evaluated for calcium content and percentage of blossom-end rot. The application of abscisic acid increased the calcium partition to the distal region of the fruits at 30 days after the beginning of flowering, as well as reduced the incidence of blossom-end rot by 86 %, when compared with plants not treated with abscisic acid. It is possible to conclude that the foliar application of abscisic acid can significantly reduce the incidence of blossom-end rot.
650 $aSolanum lycopersicum
650 $aTomatoes
650 $aÁcido Abscisico
650 $aCálcio
650 $aTomate
653 $aFito-hormônios
653 $aMecanismo de defesa vegetal
700 1 $aSOUZA, D. C. de
700 1 $aRESENDE, L. V.
700 1 $aFREITAS, S. T. de
773 $tPesquisa Agropecuária Tropical$gv. 48, n. 4, p. 414-419, oct./dec. 2018.
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