Produtividade e qualidade de grãos de canola em função da adubação nitrogenada e sulfatada

Lucas, Fábio Teixeira; Coutinho, Edson Luiz Mendes; Paes, José Mauro Valente; Barbosa, José Carlos

doi:10.5433/1679-0359.2013v34n6supl1p3205

Cited by 9 publications

(5 citation statements)

References 9 publications

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“…As a slow-release fertilizer, elemental S allows increased S application rates to be used due to its marked residual effect and lower potential for short-term losses; both of these aspects increase efficient use of S, especially in high-rainfall environments and sandy soils (Degryse et al, 2018). However, several studies have found no correlation between soil available SO 4 2--S and crop grain yield (Rheinheimer et al, 2005;Osório Filho et al, 2007;Lucas et al, 2013) not even at available SO 4 2--S contents below these critical levels. This suggests that the available SO 4 2--S content in the soil surface layer may not be an accurate predictor of crop response.…”

Section: Influence Of S Source On Crop Responsementioning

confidence: 99%

“…As a result, the available SO 4 2--S content changes during the crop cycle and it is difficult to match it to plant requirements (Ercoli et al, 2012). In addition, crop response to S fertilization follows a quadratic or exponential tendency in which, once the nutritional requirements of plants have been met, a further increase in soil available SO 4 2--S results in no increase in yield (Lucas et al, 2013).…”

Section: Influence Of S Source On Crop Responsementioning

confidence: 99%

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Crop Yield Responses to Sulfur Fertilization in Brazilian No-Till Soils: a Systematic Review

Pias

Tiecher

Cherubin

et al. 2019

Rev. Bras. Ciênc. Solo

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Sulfur (S) fertilization recommendations for grain crops in Brazil were formerly established from studies on crops with a low yield potential grown on soils under conventional tillage (CT). However, the subsequent adoption of no-tillage (NT) altered S dynamics in the soil, making it necessary to carefully evaluate the applicability of these S fertilizer recommendations. In addition, the emergence of modern high-yield-potential genotypes, the successive application of concentrated low-sulfur fertilizers, and reduction in S atmospheric deposition have raised the likelihood of positive responses of crops to S fertilization. Available literature reports contrasting crop responses to S fertilization in Brazilian soils, ranging from substantial gains to slight yield losses depending on the particular crop, soil, and climate. The primary aim of this study was to examine available data for crop grain responses to S application in NT soils in order to ascertain whether existing recommendations established for Brazilian CT soils also hold for NT soils. A systematic review of data from 35 scientific publications spanning 58 crop harvests revealed a positive yield response to S fertilization in 31 % of the crop harvests, with an average yield increase of 16 %. Crops on soils with available SO 4 2--S contents above the critical level (viz., 7.5 mg dm -3 ) exhibited no positive response to S fertilization in any crop harvest (n = 18). Dry edible bean and corn were the most responsive crops, and canola and wheat, the least. For the trials with positive crop responses, a fertilizer rate of 26 kg ha -1 S sufficed to obtain at least 95 % of the maximum possible yield. In general, the S fertilization recommendations previously established for CT soil proved effective with grain crops on NT soils as a result of the critical levels of soil available SO 4 2--S and the fact that the recommended S rates are similar to those found in this study considering trials conducted under NT conditions only. However, existing recommendations could be improved by using additional criteria for soils with available SO 4 2--S contents below the critical level since a positive response was observed in 22 % (n = 18) and 92 % (n = 12) of the crop harvests under a subtropical and a tropical climate, respectively. Our results suggest that S fertilization must be prioritized in NT soils with available SO 4 2--S contents below 7.5 mg dm -3 in the 0.00-0.20 m layer, especially in tropical climate zones. In addition, regional fertilizer recommendation guidelines should consider crop type and yield expectation in order to facilitate more sustainable S management and increased crop yields in Brazil.

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Section: Influence Of S Source On Crop Responsementioning

confidence: 99%

Section: Influence Of S Source On Crop Responsementioning

confidence: 99%

Crop Yield Responses to Sulfur Fertilization in Brazilian No-Till Soils: a Systematic Review

Pias

Tiecher

Cherubin

et al. 2019

Rev. Bras. Ciênc. Solo

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“…The yield of canola grains (Table 1), generally speaking, showed a significant reduction when it was sown on the sorghum crop and the treatment without cultivation, in both managements (mowing and desiccating). Again, the nitrogen availability may explain the increase of this variable, as well as the phytoremediation potential of these species, which was verified in the greenhouse experiment for brown hemp and velvet bean, with canola being highly responsive to the availability of nitrogen in the soil (Lucas et al, 2013).…”

Section: Experiments With Fomesafenmentioning

confidence: 55%

Selection of Species with Soil Phytoremediation Potential After the Application of Protox-Inhibiting Herbicides

et al. 2018

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The objective of this work was to evaluate the phytoremediation potential of summer-grown species planted in soils contaminated with the herbicides fomesafen or sulfentrazone. In a greenhouse, doses of fomesafen (0.0, 0.125, 0.25 and 0.5 kg ha-1) and or sulfentrazone (0.0, 0.3, 0.6 and 1.2 kg ha-1), were applied in the pre-emergence of brown hemp, millet, velvet bean and sorghum. On the field, the recommended doses of fomesafen (0.250 kg ha-1) and sulfentrazone (0.600 kg ha-1) were used in the pre-emergence of brown hemp, velvet bean and sorghum, plus a treatment without cultivation. These species, before planting canola (bioindicator species), were submitted to mowing and burndown. In greenhouse trials, velvet bean, millet and sorghum tolerated fomesafen up to the recommended dose; sulfentrazone caused the total death of these plants. In the field experiments, the cultivation of velvet bean and brown hemp, in general, were the best alternatives preceding canola, in soil contaminated with fomesafen, and mainly velvet bean for sulfentrazone-contaminated areas. The number of siliques per plant of canola and its productivity were superior when using velvet bean as cover crop for both herbicides, regardless of the adopted management. It is possible to conclude that brown hemp and velvet bean were the species that best phytoremediated soils treated with fomesafen or sulfentrazone, and could be used in the decontamination of soils treated with these herbicides, regardless of the adopted management.

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“…Estes resultados confirmam que o N é um nutriente limitante na cultura da canola, na região de estudo, já que todos os tratamentos que receberam fertilização nitrogenada apresentaram maiores rendimentos que a testemunha, concordando com os trabalhos de Hocking et al (1997); Németh et al (2009); Öztürk, (2010); Lucas et al (2013) e Kaefer et al (2014). Hocking et al (1997) afirmam que a fase mais importante no abastecimento de N para produção de fitomassa seca, é o período entre o início e o fim da floração, onde a maior absorção de N começa antes da floração, e N utilizado no crescimento e desenvolvimento de grãos é aquele que provém do N mobilizado principalmente a partir do caule e folhas.…”

Section: Resultsunclassified

“…O mesmo autor verificou que a fonte de N também afeta o rendimento final da canola. Lucas et al (2013) constataram aumento na produtividade de canola aplicando 180 kg de N ha -1 , onde a produtividade de grãos passou de 709 kg ha -1 a 1132 kg ha -1 . Hocking et al (1997) constataram que a máxima acumulação de fitomassa ocorreu quando o N foi aplicado no inicio da floração, onde a dose de 75 kg de N ha -1 foi a mais eficiente em aumentar o rendimento de grãos.…”

Section: Introductionunclassified

Manejo Da Adubação Nitrogenada Na Cultura Da Canola

Puhl

Rasche

2015

Rev. Agric. Neotrop.

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RESUMO. Atualmente não existe recomendação de fertilização nitrogenada na canola no Paraguai. O objetivo foi verificar o efeito do manejo da adubação nitrogenada na cultura de canola. Foi implantado um experimento com 5 tratamentos que consistiram em diferentes doses e épocas de aplicação de N na cultura da canola T1: 0 kg de N ha-1 ; T2: 15 kg de N ha-1 na semeadura; T3: 15 kg de N ha-1 na semeadura, 46 kg de N ha-1 no início da roseta; T4: 15 kg de N ha-1 na semeadura e 46 kg de N ha-1 na roseta e; T5: 15 kg de N ha-1 na semeadura, 23 kg de N ha-1 no início de roseta e 23 kg de N ha-1 na floração, com quatro repetições. O delineamento experimental utilizado foi de blocos ao acaso com quatro repetições. Foi determinada altura de planta aos 60 dias após a semeadura e no final de ciclo, o número de síliquas por planta, rendimento de grãos e massa de 1000 grãos. A aplicação de N produziu efeito significativo em todas as variáveis analisadas, com exceção da massa de mil grãos. O número de síliquas por planta passou de 86 no T1, para 252 no T5 e o rendimento variou de 607 kg ha-1 no T1 a 1808 kg ha-1 no T5, havendo correlação entre estas variáveis. A aplicação de N aumentou o rendimento de grãos de canola, propiciando maior rendimento quando aplicado o N na base e em cobertura parceladamente.

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Produtividade e qualidade de grãos de canola em função da adubação nitrogenada e sulfatada

Cited by 9 publications

References 9 publications

Crop Yield Responses to Sulfur Fertilization in Brazilian No-Till Soils: a Systematic Review

Crop Yield Responses to Sulfur Fertilization in Brazilian No-Till Soils: a Systematic Review

Selection of Species with Soil Phytoremediation Potential After the Application of Protox-Inhibiting Herbicides

Manejo Da Adubação Nitrogenada Na Cultura Da Canola

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