2007
DOI: 10.1590/s0100-06832007000500015
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Recomendação de adubação nitrogenada para trigo em sucessão ao silho e soja sob sistema plantio direto no Paraguai

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Cited by 23 publications
(25 citation statements)
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“…The fertilizer rate needed to increase the soil-test value by 0.01 cmol c dm -3 K was 11.1 kg ha -1 K 2 O in Guarapuava and Pinhão, and 9.1 kg ha -1 K 2 O in Candói. These values are lower than the requirement of 20.3 kg ha -1 previously determined by Schlindwein et al (2013) for the 0.00-0.20 m soil layer in the highlands of Rio Grande do Sul, and also lower than the value determined by Wendling et al (2008) ) by the difference between the critical soil-test K value and intermediate value for the medium class, and the highest value for the low class, because only a few soils in the region contained less than 0.12 cmol c dm -3 K. Thus, the soils in the low K class required 115 kg ha -1 K 2 O for their K content to be raised from 0.12 to 0.23 cmol c dm -3 , and those in the medium class required 55 kg ha -1 K 2 O for the content to be increased from 0.175 to 0.23 cmol c dm -3 .…”
Section: Potassium Fertilization Recommendationcontrasting
confidence: 67%
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“…The fertilizer rate needed to increase the soil-test value by 0.01 cmol c dm -3 K was 11.1 kg ha -1 K 2 O in Guarapuava and Pinhão, and 9.1 kg ha -1 K 2 O in Candói. These values are lower than the requirement of 20.3 kg ha -1 previously determined by Schlindwein et al (2013) for the 0.00-0.20 m soil layer in the highlands of Rio Grande do Sul, and also lower than the value determined by Wendling et al (2008) ) by the difference between the critical soil-test K value and intermediate value for the medium class, and the highest value for the low class, because only a few soils in the region contained less than 0.12 cmol c dm -3 K. Thus, the soils in the low K class required 115 kg ha -1 K 2 O for their K content to be raised from 0.12 to 0.23 cmol c dm -3 , and those in the medium class required 55 kg ha -1 K 2 O for the content to be increased from 0.175 to 0.23 cmol c dm -3 .…”
Section: Potassium Fertilization Recommendationcontrasting
confidence: 67%
“…Data were fitted by using the Mitscherlich equation, an exponential expression used to reach a relative yield of 100 %, which is widely used for calibration (Cubilla et al, 2007;Villalba, 2008;Wendling et al, 2008;Schlindwein et al, 2011):…”
Section: Fitting Calibration Curves and Determination Of Critical Soimentioning
confidence: 99%
“…Portanto, concluíram que a máxima produtividade de grãos pela eficiência técnica não resulta em melhores rendimentos num contexto geral sobre a produção. Fato também observado em cereais como arroz (Freitas et al, 2008) e trigo (Wendling et al, 2007). Em seus estudos, Kolchinski & Schuch (2003) encontraram maior eficiência de produtividade de grãos pelo N em aveia branca, ao redor de 70 kg ha -1 entretanto com genótipos que evidenciavam forte tendência à produção de biomassa total.…”
Section: Resultsunclassified
“…Entretanto, a maior parte das áreas permanece em pousio. Em função da elevada relação C/N da palhada do milho, esta mobiliza maior quantidade de nitrogênio para a sua decomposição (Wendling et al, 2007). Este é um problema quando se cultiva em sucessão uma cultura também exigente em nitrogênio, que é o caso da cultura do trigo.…”
Section: Introductionunclassified