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Registro Completo |
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Biblioteca(s): |
Embrapa Arroz e Feijão; Embrapa Pecuária Sudeste. |
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Data corrente: |
03/01/2011 |
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Data da última atualização: |
29/03/2011 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
BERNARDI, A. C. C.; GIMENEZ, L. M.; SILVA, C. A.; MACHADO, P. L. O. A. |
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Afiliação: |
ALBERTO CARLOS DE CAMPOS BERNARDI, CPPSE; LEANDRO M. GIMENEZ, CSEM BRASIL-BELO HORIZONTE; C. A. SILVA, UFLA; PEDRO LUIZ OLIVEIRA DE A MACHADO, CNPAF. |
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Título: |
Variable rate application of potassium fertilizer for soybean crop growth in a no-till system. |
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Ano de publicação: |
2010 |
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Fonte/Imprenta: |
In: INTERNATIONAL CONFERENCE ON PRECISION AGRICULTURE, 10., 2010, Denver. Proceedings... Denver: Denver Tech Center, 2010. |
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Idioma: |
Português |
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Conteúdo: |
Variable rate application of fertilizer has the potential to improve nutrient use efficiency, improve economic returns, and reduce negative environmental impacts. The objective of this study was to evaluate the variable rate application of potassium fertilizer to soybean crop in a no-till system. The study was conducted on a 13-ha soybean grain field in Carambeí, State of Paraná, Brazil in a Typic Hapludox. The area has been under no-tillage for more than 10 years growing grains (soybean, wheat and maize) in rotation with a cover crop (oat). Four treatments were used: control, 40, 80 and 120 kg ha-1 of K2O applied as KCl. Narrow strip plots of 18 X 1,000 m were assigned in three blocks within the 13-ha field. In each strip plot grain yield was continuously evaluated at the harvest time with a combine equipped with yield monitoring and a real-time global positioning system unit (GPS) without differential correction. Data storage in geographical information system (GIS) was used to fit the kriged yield map. Soybean average yield was 3,838 kg ha-1, and spatial differences in yield were observed with grain yields ranging form 2,100 to 6,583 kg ha-1. These differences occurred where previous analysis showed soil texture variation. Maps of K exportation by grains indicated that the uniform rate fertilizer would not replace adequately the K fertilizer. These results showed that the recommendation map for variable rate of potassium fertilization can be accomplished by the yield maps from the past years. These results showed that VRT of potassium for this plot could be performed based on yield maps, and it could be used in reducing yield variability and maintaining profitability while optimizing K applications. MenosVariable rate application of fertilizer has the potential to improve nutrient use efficiency, improve economic returns, and reduce negative environmental impacts. The objective of this study was to evaluate the variable rate application of potassium fertilizer to soybean crop in a no-till system. The study was conducted on a 13-ha soybean grain field in Carambeí, State of Paraná, Brazil in a Typic Hapludox. The area has been under no-tillage for more than 10 years growing grains (soybean, wheat and maize) in rotation with a cover crop (oat). Four treatments were used: control, 40, 80 and 120 kg ha-1 of K2O applied as KCl. Narrow strip plots of 18 X 1,000 m were assigned in three blocks within the 13-ha field. In each strip plot grain yield was continuously evaluated at the harvest time with a combine equipped with yield monitoring and a real-time global positioning system unit (GPS) without differential correction. Data storage in geographical information system (GIS) was used to fit the kriged yield map. Soybean average yield was 3,838 kg ha-1, and spatial differences in yield were observed with grain yields ranging form 2,100 to 6,583 kg ha-1. These differences occurred where previous analysis showed soil texture variation. Maps of K exportation by grains indicated that the uniform rate fertilizer would not replace adequately the K fertilizer. These results showed that the recommendation map for variable rate of potassium fertilization can be accomplished by the yield maps... Mostrar Tudo |
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Palavras-Chave: |
Soybean. |
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Thesagro: |
Oxisol; Plantio direto; Potássio; Soja. |
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Thesaurus Nal: |
no-tillage; potassium; Soybeans; spatial variation; Variable rate application. |
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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/31503/1/138.pdf
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Marc: |
LEADER 02555nam a2200265 a 4500
001 1883514
005 2011-03-29
008 2010 bl uuuu u00u1 u #d
100 1 $aBERNARDI, A. C. C.
245 $aVariable rate application of potassium fertilizer for soybean crop growth in a no-till system.$h[electronic resource]
260 $aIn: INTERNATIONAL CONFERENCE ON PRECISION AGRICULTURE, 10., 2010, Denver. Proceedings... Denver: Denver Tech Center$c2010
520 $aVariable rate application of fertilizer has the potential to improve nutrient use efficiency, improve economic returns, and reduce negative environmental impacts. The objective of this study was to evaluate the variable rate application of potassium fertilizer to soybean crop in a no-till system. The study was conducted on a 13-ha soybean grain field in Carambeí, State of Paraná, Brazil in a Typic Hapludox. The area has been under no-tillage for more than 10 years growing grains (soybean, wheat and maize) in rotation with a cover crop (oat). Four treatments were used: control, 40, 80 and 120 kg ha-1 of K2O applied as KCl. Narrow strip plots of 18 X 1,000 m were assigned in three blocks within the 13-ha field. In each strip plot grain yield was continuously evaluated at the harvest time with a combine equipped with yield monitoring and a real-time global positioning system unit (GPS) without differential correction. Data storage in geographical information system (GIS) was used to fit the kriged yield map. Soybean average yield was 3,838 kg ha-1, and spatial differences in yield were observed with grain yields ranging form 2,100 to 6,583 kg ha-1. These differences occurred where previous analysis showed soil texture variation. Maps of K exportation by grains indicated that the uniform rate fertilizer would not replace adequately the K fertilizer. These results showed that the recommendation map for variable rate of potassium fertilization can be accomplished by the yield maps from the past years. These results showed that VRT of potassium for this plot could be performed based on yield maps, and it could be used in reducing yield variability and maintaining profitability while optimizing K applications.
650 $ano-tillage
650 $apotassium
650 $aSoybeans
650 $aspatial variation
650 $aVariable rate application
650 $aOxisol
650 $aPlantio direto
650 $aPotássio
650 $aSoja
653 $aSoybean
700 1 $aGIMENEZ, L. M.
700 1 $aSILVA, C. A.
700 1 $aMACHADO, P. L. O. A.
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Registro original: |
Embrapa Arroz e Feijão (CNPAF) |
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Registro Completo
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Biblioteca(s): |
Embrapa Roraima. |
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Data corrente: |
10/02/2016 |
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Data da última atualização: |
09/10/2017 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
OLIVEIRA, V. X. A.; ALENCAR, A M. da S.; PEDROZO, C. A.; PEREIRA, T. dos S. |
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Afiliação: |
CASSIA ANGELA PEDROZO, CPAF-RR; TAIGUARA DOS SANTOS PEREIRA, CPAF-RR. |
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Título: |
Análise das fases fenológicas do cedro doce no município de Mucajaí - RR. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
In: SEMANA NACIONAL DE CIÊNCIA E TECNOLOGIA NO ESTADO DE RORAIMA, 10., 2015, Boa Vista. Resumos... Boa Vista, RR: UERR, 2015. |
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Idioma: |
Português |
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Thesaurus NAL: |
Pachira quinata. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/138607/1/cassia1.pdf
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Marc: |
LEADER 00527nam a2200145 a 4500
001 2036375
005 2017-10-09
008 2015 bl uuuu u00u1 u #d
100 1 $aOLIVEIRA, V. X. A.
245 $aAnálise das fases fenológicas do cedro doce no município de Mucajaí - RR.
260 $aIn: SEMANA NACIONAL DE CIÊNCIA E TECNOLOGIA NO ESTADO DE RORAIMA, 10., 2015, Boa Vista. Resumos... Boa Vista, RR: UERR$c2015
650 $aPachira quinata
700 1 $aALENCAR, A M. da S.
700 1 $aPEDROZO, C. A.
700 1 $aPEREIRA, T. dos S.
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Registro original: |
Embrapa Roraima (CPAF-RR) |
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