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Registro Completo |
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Biblioteca(s): |
Embrapa Algodão; Embrapa Milho e Sorgo. |
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Data corrente: |
18/08/2021 |
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Data da última atualização: |
15/10/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
FERREIRA, A. C. de B.; BORIN, A. L. D. C.; LAMAS, F. M.; FERREIRA, G. B.; RESENDE, A. V. de. |
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Afiliação: |
ALEXANDRE CUNHA DE BARCELLOS FERREIRA; ANA LUIZA DIAS COELHO BORIN, CNPA; FERNANDO MENDES LAMAS, CPAO; GILVAN BARBOSA FERREIRA, CNPA; ALVARO VILELA DE RESENDE, CNPMS. |
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Título: |
Exchangeable potassium reserve in a Brazilian savanna Oxisol after nine years under different cotton production systems. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Scientia Agricola, v.79, n.4, e20200339, 2022. |
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DOI: |
http://doi.org/10.1590/1678-992X-2020-0339 |
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Idioma: |
Inglês |
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Conteúdo: |
Adequate potassium (K) fertilization is essential for agricultural production in soils of the Brazilian Savanna (Cerrado biome) due to the high demand by crops (especially cotton), likelihood of leaching losses, and the dependence on fertilizer importations. Therefore, sustainability requires improvements in the soil efficiency management. This study evaluated the influence of soil management and crop succession or rotation combinations with cotton on K dynamics and exchangeable reserves in the soil profile, and the partial balance of K after nine years of cultivation in a clayey Oxisol in the Cerrado. The soil was sampled in layers up to 100 cm depth in four cotton production systems treatments: 1) conventional soil tillage (CST) with cotton monoculture; 2) CST with annual cotton-soybean-cotton succession; 3) CST with cotton/soybean/maize rotation; and 4) no-tillage system (NTS) with cotton/soybean/maize rotation and Urochloa ruziziensis (ruzigrass) as a cover crop in the off-season after grain crops. The experiment was conducted using a randomized block design with four replications. CST with cotton monoculture favored the leaching of K surplus from fertilization. Crop rotation including ruzigrass in the NTS allowed better control of K dynamics, ensuring its circulation in the soil-plant compartments and reducing leaching. The increased organic matter (OM) in this system enlarges the storage capacity of K in the topsoil. The adoption of no-tillage crop systems integrating ruzigrass is viable to improve the efficiency of K fertilizers in cotton cultivation in highly weathered tropical soils. MenosAdequate potassium (K) fertilization is essential for agricultural production in soils of the Brazilian Savanna (Cerrado biome) due to the high demand by crops (especially cotton), likelihood of leaching losses, and the dependence on fertilizer importations. Therefore, sustainability requires improvements in the soil efficiency management. This study evaluated the influence of soil management and crop succession or rotation combinations with cotton on K dynamics and exchangeable reserves in the soil profile, and the partial balance of K after nine years of cultivation in a clayey Oxisol in the Cerrado. The soil was sampled in layers up to 100 cm depth in four cotton production systems treatments: 1) conventional soil tillage (CST) with cotton monoculture; 2) CST with annual cotton-soybean-cotton succession; 3) CST with cotton/soybean/maize rotation; and 4) no-tillage system (NTS) with cotton/soybean/maize rotation and Urochloa ruziziensis (ruzigrass) as a cover crop in the off-season after grain crops. The experiment was conducted using a randomized block design with four replications. CST with cotton monoculture favored the leaching of K surplus from fertilization. Crop rotation including ruzigrass in the NTS allowed better control of K dynamics, ensuring its circulation in the soil-plant compartments and reducing leaching. The increased organic matter (OM) in this system enlarges the storage capacity of K in the topsoil. The adoption of no-tillage crop systems integrating ... Mostrar Tudo |
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Thesagro: |
Capim Urochloa; Fertilizante Potássico; Gramínea Forrageira; Plantio Direto. |
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Thesaurus Nal: |
Long term experiments; No-tillage; Potassium fertilizers; Urochloa ruziziensis. |
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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/225479/1/Exchangeable-potassium-reserve.pdf
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Marc: |
LEADER 02513naa a2200277 a 4500
001 2133690
005 2021-10-15
008 2022 bl uuuu u00u1 u #d
024 7 $ahttp://doi.org/10.1590/1678-992X-2020-0339$2DOI
100 1 $aFERREIRA, A. C. de B.
245 $aExchangeable potassium reserve in a Brazilian savanna Oxisol after nine years under different cotton production systems.$h[electronic resource]
260 $c2022
520 $aAdequate potassium (K) fertilization is essential for agricultural production in soils of the Brazilian Savanna (Cerrado biome) due to the high demand by crops (especially cotton), likelihood of leaching losses, and the dependence on fertilizer importations. Therefore, sustainability requires improvements in the soil efficiency management. This study evaluated the influence of soil management and crop succession or rotation combinations with cotton on K dynamics and exchangeable reserves in the soil profile, and the partial balance of K after nine years of cultivation in a clayey Oxisol in the Cerrado. The soil was sampled in layers up to 100 cm depth in four cotton production systems treatments: 1) conventional soil tillage (CST) with cotton monoculture; 2) CST with annual cotton-soybean-cotton succession; 3) CST with cotton/soybean/maize rotation; and 4) no-tillage system (NTS) with cotton/soybean/maize rotation and Urochloa ruziziensis (ruzigrass) as a cover crop in the off-season after grain crops. The experiment was conducted using a randomized block design with four replications. CST with cotton monoculture favored the leaching of K surplus from fertilization. Crop rotation including ruzigrass in the NTS allowed better control of K dynamics, ensuring its circulation in the soil-plant compartments and reducing leaching. The increased organic matter (OM) in this system enlarges the storage capacity of K in the topsoil. The adoption of no-tillage crop systems integrating ruzigrass is viable to improve the efficiency of K fertilizers in cotton cultivation in highly weathered tropical soils.
650 $aLong term experiments
650 $aNo-tillage
650 $aPotassium fertilizers
650 $aUrochloa ruziziensis
650 $aCapim Urochloa
650 $aFertilizante Potássico
650 $aGramínea Forrageira
650 $aPlantio Direto
700 1 $aBORIN, A. L. D. C.
700 1 $aLAMAS, F. M.
700 1 $aFERREIRA, G. B.
700 1 $aRESENDE, A. V. de
773 $tScientia Agricola$gv.79, n.4, e20200339, 2022.
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Registro original: |
Embrapa Algodão (CNPA) |
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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: |
01/12/2015 |
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Data da última atualização: |
26/09/2017 |
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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: |
STEIDLE NETO, A. J.; BORGES JÚNIOR, J. C. F.; ANDRADE, C. L. T.; LOPES, D. C.; NASCIMENTO, P. T. |
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Afiliação: |
CAMILO DE LELIS TEIXEIRA DE ANDRADE, CNPMS. |
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Título: |
Reference evapotranspiration estimates based on minimum meteorological variable requirements of historical weather data. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
Chilean Journal of Agricultural Research, Santiago, v. 75, n. 3, p. 366-374, 2015. |
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DOI: |
10.4067/S0718-58392015000400014 |
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Idioma: |
Inglês |
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Conteúdo: |
Reference evapotranspiration (ET0) is critical for agricultural and urban planning, irrigation scheduling, regional water balance studies, and agroclimatological zoning. The objective of this study was to estimate ET0 based on methods with minimum meteorological variable requirements and on empirical models to predict solar radiation. These alternative methods were compared to the FAO Penman-Monteith method by using more than 80 yr of historical weather data. Alternative methods were adapted from the standard FAO Penman-Monteith or Priestley-Taylor methods, which allow estimating ET0 when fewer meteorological variables are available. The Hargreaves-Samani method was also analyzed. The mean absolute error, index of agreement, correlation coefficient, and confidence index were used to compare the alternative methods. Results showed that alternative methods based on the maximum and minimum temperatures, sunshine hours, and/or wind speed are appropriate for estimating ET0 in the region under study. |
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Palavras-Chave: |
Modelagem. |
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Thesagro: |
Evapotranspiração. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01717naa a2200205 a 4500
001 2030165
005 2017-09-26
008 2015 bl uuuu u00u1 u #d
024 7 $a10.4067/S0718-58392015000400014$2DOI
100 1 $aSTEIDLE NETO, A. J.
245 $aReference evapotranspiration estimates based on minimum meteorological variable requirements of historical weather data.$h[electronic resource]
260 $c2015
520 $aReference evapotranspiration (ET0) is critical for agricultural and urban planning, irrigation scheduling, regional water balance studies, and agroclimatological zoning. The objective of this study was to estimate ET0 based on methods with minimum meteorological variable requirements and on empirical models to predict solar radiation. These alternative methods were compared to the FAO Penman-Monteith method by using more than 80 yr of historical weather data. Alternative methods were adapted from the standard FAO Penman-Monteith or Priestley-Taylor methods, which allow estimating ET0 when fewer meteorological variables are available. The Hargreaves-Samani method was also analyzed. The mean absolute error, index of agreement, correlation coefficient, and confidence index were used to compare the alternative methods. Results showed that alternative methods based on the maximum and minimum temperatures, sunshine hours, and/or wind speed are appropriate for estimating ET0 in the region under study.
650 $aEvapotranspiração
653 $aModelagem
700 1 $aBORGES JÚNIOR, J. C. F.
700 1 $aANDRADE, C. L. T.
700 1 $aLOPES, D. C.
700 1 $aNASCIMENTO, P. T.
773 $tChilean Journal of Agricultural Research, Santiago$gv. 75, n. 3, p. 366-374, 2015.
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Embrapa Milho e Sorgo (CNPMS) |
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