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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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 | Acesso ao texto completo restrito à biblioteca da Embrapa Trigo. Para informações adicionais entre em contato com cnpt.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Trigo. |
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Data corrente: |
16/04/2021 |
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Data da última atualização: |
10/12/2021 |
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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: |
LOLLATO, R. P.; JAENISCH, B. R.; SILVA, S. R. |
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Afiliação: |
ROMULO P. LOLLATO, Dep. of Agronomy, Kansas State Univ., 2004 Throckmorton Bld., 1712 Claflin Rd., Manhattan, KS 66506, USA; BRENT R. JAENISCH, 1 Dep. of Agronomy, Kansas State Univ., 2004 Throckmorton Bld., 1712 Claflin Rd., Manhattan, KS 66506, USA; SERGIO RICARDO SILVA, CNPT. |
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Título: |
Genotype-specific nitrogen uptake dynamics and fertilizer management explain contrasting wheat protein concentration. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Crop Science, p. 1-19, Dec. 2021. |
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DOI: |
10.1002/csc2.20442 |
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Idioma: |
Inglês |
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Conteúdo: |
Increasing yield and grain protein concentration (GPC) in wheat (Triticum aestivum L.) without excessive nitrogen (N) rates requires increasing N use efficiency (NUE, yield per available N). We assessed the effects of N rate and timing on yield, GPC, and N nutritional indices of two winter wheat genotypes with similar yield but contrasting GPC. Factorial field experiments evaluated the wheat genotypes ?LCS Chrome? (high GPC) and ?WB?Grainfield? (low GPC), three N rates, and four N timings (?Fall?, 100% of N rate applied at Zadoks GS20; ?Spring?, 100% at GS25; ?Split?, 40% Fall plus 60% Spring; and ?Anthesis?, 40% fall, 50% spring, and 10% at GS61) in six Kansas environments. Yield ranged from 2,853 to 8,023 kg ha-1 and GPC from 88 to 152 g kg-1. Fall and spring N timing had the lowest and greatest yield difference from the zero-N control and showed linear, linear-plateau or no responses to N rate. ?LCS Chrome? had 5 to 19 g kg-1 greater GPC than ?WB?Grainfield?, which was associated with greater post-anthesis N uptake (24 vs 15% of maturity-N uptake), a greater spike N gain between anthesis and maturity (7.4 vs 6.5 g m-2), and greater N recovery efficiency (0.34 vs 0.28 kg kg-1). Greater N rates and Anthesis or Spring N timings increased GPC. The NUE (range: 20?311 kg kg-1) was inversely related to N availability, and Fall N timing had the lowest NUE. Our results highlighted physiological reasons for genotype-specific GPC performance and suggested agronomic opportunities to simultaneously improve wheat yield and GPC. MenosIncreasing yield and grain protein concentration (GPC) in wheat (Triticum aestivum L.) without excessive nitrogen (N) rates requires increasing N use efficiency (NUE, yield per available N). We assessed the effects of N rate and timing on yield, GPC, and N nutritional indices of two winter wheat genotypes with similar yield but contrasting GPC. Factorial field experiments evaluated the wheat genotypes ?LCS Chrome? (high GPC) and ?WB?Grainfield? (low GPC), three N rates, and four N timings (?Fall?, 100% of N rate applied at Zadoks GS20; ?Spring?, 100% at GS25; ?Split?, 40% Fall plus 60% Spring; and ?Anthesis?, 40% fall, 50% spring, and 10% at GS61) in six Kansas environments. Yield ranged from 2,853 to 8,023 kg ha-1 and GPC from 88 to 152 g kg-1. Fall and spring N timing had the lowest and greatest yield difference from the zero-N control and showed linear, linear-plateau or no responses to N rate. ?LCS Chrome? had 5 to 19 g kg-1 greater GPC than ?WB?Grainfield?, which was associated with greater post-anthesis N uptake (24 vs 15% of maturity-N uptake), a greater spike N gain between anthesis and maturity (7.4 vs 6.5 g m-2), and greater N recovery efficiency (0.34 vs 0.28 kg kg-1). Greater N rates and Anthesis or Spring N timings increased GPC. The NUE (range: 20?311 kg kg-1) was inversely related to N availability, and Fall N timing had the lowest NUE. Our results highlighted physiological reasons for genotype-specific GPC performance and suggested agronomic opportunities to ... Mostrar Tudo |
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Palavras-Chave: |
Grain protein concentration (GPC); Wheat (Triticum aestivum L). |
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Thesagro: |
Trigo; Triticale. |
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Thesaurus NAL: |
Wheat. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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Marc: |
LEADER 02205naa a2200217 a 4500
001 2131344
005 2021-12-10
008 2021 bl uuuu u00u1 u #d
024 7 $a10.1002/csc2.20442$2DOI
100 1 $aLOLLATO, R. P.
245 $aGenotype-specific nitrogen uptake dynamics and fertilizer management explain contrasting wheat protein concentration.$h[electronic resource]
260 $c2021
520 $aIncreasing yield and grain protein concentration (GPC) in wheat (Triticum aestivum L.) without excessive nitrogen (N) rates requires increasing N use efficiency (NUE, yield per available N). We assessed the effects of N rate and timing on yield, GPC, and N nutritional indices of two winter wheat genotypes with similar yield but contrasting GPC. Factorial field experiments evaluated the wheat genotypes ?LCS Chrome? (high GPC) and ?WB?Grainfield? (low GPC), three N rates, and four N timings (?Fall?, 100% of N rate applied at Zadoks GS20; ?Spring?, 100% at GS25; ?Split?, 40% Fall plus 60% Spring; and ?Anthesis?, 40% fall, 50% spring, and 10% at GS61) in six Kansas environments. Yield ranged from 2,853 to 8,023 kg ha-1 and GPC from 88 to 152 g kg-1. Fall and spring N timing had the lowest and greatest yield difference from the zero-N control and showed linear, linear-plateau or no responses to N rate. ?LCS Chrome? had 5 to 19 g kg-1 greater GPC than ?WB?Grainfield?, which was associated with greater post-anthesis N uptake (24 vs 15% of maturity-N uptake), a greater spike N gain between anthesis and maturity (7.4 vs 6.5 g m-2), and greater N recovery efficiency (0.34 vs 0.28 kg kg-1). Greater N rates and Anthesis or Spring N timings increased GPC. The NUE (range: 20?311 kg kg-1) was inversely related to N availability, and Fall N timing had the lowest NUE. Our results highlighted physiological reasons for genotype-specific GPC performance and suggested agronomic opportunities to simultaneously improve wheat yield and GPC.
650 $aWheat
650 $aTrigo
650 $aTriticale
653 $aGrain protein concentration (GPC)
653 $aWheat (Triticum aestivum L)
700 1 $aJAENISCH, B. R.
700 1 $aSILVA, S. R.
773 $tCrop Science, p. 1-19, Dec. 2021.
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