Nitrogen fertilization and potassium requirement for cereal crops under a continuous no-till system

Fornari, Allison José; Caires, Eduardo Fávero; Bini, Ângelo Rafael; Haliski, Adriano; Tzaskos, Lucas; Joris, Hélio Antônio Wood

doi:10.1016/s1002-0160(20)60035-2

Cited by 8 publications

(4 citation statements)

References 29 publications

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“…The high level of K in the soil (cmolc dm -3 ) justifies the results found in grain production. When there are high levels of K in the soil, fertilization normally does not increase yield [34,35]. In soils classified as having good fertility (i.e., adequate levels of macronutrients and organic matter), fertilization inversion can occur to take advantage of all its advantages, such as lower fertilizer prices in autumn compared to spring, lower nutrient losses, higher operational yield at sowing of the corn crop and a larger window of applications in the winter period, in a contrary situation with a low fertility soil such success would not have been achieved.…”

Section: Discussionmentioning

confidence: 99%

Nitrogen and potassium fertilization strategies in integrated systems in different black oat management on corn crop

Soares¹,

Assmann²,

Missio³

et al. 2023

Sci. Plena

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This study aimed to evaluate levels of potassium and nitrogen fertilizer inversion in the black oat crop on corn crop yields. The experimental design was a randomized block design with subdivided plots with three repetitions. The treatments were four nitrogen fertilization strategies, four potassium fertilization strategies, and two oat crop managements (forage and cover crop). The strategies involved winter (oats) and summer (corn) application, respectively, with the following combinations of nitrogen (200-0; 150-50; 50-150; 0-200 kg N ha-1) and potassium (80-0; 60-20; 20-60; 0-80 kg K ha-1). We evaluated the morphological aspects, grain productivity, chlorophyll contents, and light interception of oats for forage production and ground cover, and for corn the yield components and productivity. Oats managed as forage showed higher forage mass production but lower values of residual biomass, canopy height, extended tiller length, lodging index, radiation interception, and oat chlorophyll A and total. Light interception in the oat crop was higher when nitrogen was applied in the pasture. For the corn crop, nitrogen applied partially on black oat and the remaining on corn row crop increases stalk diameter. Fertilization strategies showed no significant effect on both crops in the system, indicating that it is possible to reverse or apply the entire amount of N and K predicted for the two crops in winter.

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Section: Discussionmentioning

confidence: 99%

Nitrogen and potassium fertilization strategies in integrated systems in different black oat management on corn crop

Soares¹,

Assmann²,

Missio³

et al. 2023

Sci. Plena

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“…Potassium (K) is an essential nutrient for plants and highly demanded by agricultural species (Firmano et al, 2020). Together with nitrogen (N), it is the nutrient absorbed in greater quantities by plants (Filippi et al, 2021), and when in excess in the soil, plants can use it beyond their need for luxury consumption (Kang et al, 2014;Fornari et al, 2020). Data collected in the meta-analysis by Filippi et al (2021) show the largest export of K by the most recent soybean cultivars, noting that in most of Brazil, K replacements are below what is necessary.…”

Section: Introductionmentioning

confidence: 99%

Potassium buffering capacity and corrective potassium fertilizer recommendations in soils from Southern Brazil

Souza¹,

Mumbach²,

Almeida³

et al. 2022

Revista Brasileira De Ciência Do Solo

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Soils with low potassium (K) availability require corrective fertilization for grain crops. The recommended rate to increase K availability up to the critical level depends on the soil K buffering capacity (KBC). This study aimed to quantify the KBC and recalculate the rates necessary to reach the K critical level in 23 soils from Southern Brazil. Soil samples were incubated with six K rates, that were thus grouped according to CEC pH7.0 : below 7.5 cmol c dm -3 (0, 30, 60, 90, 120 and 180 kg K 2 O ha -1 ); from 7.6 to 15 cmol c dm -3 (0, 30, 60, 120, 180 and 240 kg K 2 O ha -1 ) and from 15.1 to 30 cmol c dm -3 (0, 30, 60, 120, 240 and 360 kg K 2 O ha -1 ). The soil test K (STK) was extracted by Mehlich-1 and the fertilizer rates necessary to increase the STK by 1 mg dm -3 were quantified. The KBC values were correlated with a suite of soil testing metrics. The relationship between the cation exchange capacity (CEC pH7.0 ) and KBC was modeled, and a linear-plateau equation presented the best fit. The K rates were calculated using the following equation: K rate = (Critical Level -STK) × KBC and were compared with the current rate indicated by the Local Soil Fertility Committee. The K fertilizer rates by KBC were about 2.5 times higher than the values currently indicated, and the largest differences were observed in soils with low STK and high CEC pH7.0 .

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“…A cultura do milho (Zea mays L.) se destaca no cenário produtivo brasileiro, com área plantada na safra 2019/2020 de 18,2 milhões de hectares e produção estimada em 101,9 milhões de toneladas com produtividade 0,88% maior que na safra 2018/2019 (CONAB, 2020). A produtividade do milho é maior em sistema de plantio direto (SPD) devido ao aumento dos teores de nutrientes e melhoria das características físicas do solo (Silva, et al, 2017;Fornari, et al, 2020).…”

Section: Introductionunclassified

Adubação antecipada e formas de distribuição do fertilizante na semeadura do milho

Silva

Yano

Mariano

et al. 2021

RSD

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A antecipação e a distribuição a lanço do adubo aumentam a eficiência operacional da semeadura do milho por dispensar a necessidade de abastecimento com adubo na semeadora. O objetivo do trabalho foi estudar a antecipação e formas de adubação de semeadura do milho visando aumentar a eficiência operacional, e performasse de atributos agronômicos com adubação a lanço após a semeadura seguida da distribuição da palhada sobre a superfície do solo em sistema de plantio direto (SPD). O experimento foi conduzido na Fazenda de Ensino, Pesquisa e Extensão da Ilha Solteira-UNESP em Selvíria, Mato Grosso do Sul, Brasil. A cultivar escolhida foi a VT PRO 2. O delineamento utilizado foi inteiramente casualizado, com 10 tratamentos: efeito residual da haste, adubo a lanço 30 dias antes da semeadura (DAS) e no dia; adubo a lanço 30 DAS e no dia; adubação a lanço e manejo da vegetação com triturador horizontal de palha; incorporação do adubo com haste e disco 30 DAS e dia de semeadura; efeito residual da haste semeado sem adubo e semeadura sem adubo. Massa seca de plantas, produtividade de grãos e outras variáveis foram analisadas. Produtividade de grãos foram semelhantes entre os tratamentos. Produção de massa seca de plantas foi maior com o triturador. Produtividade de grãos foi semelhante com modos de distribuição e período de aplicação do adubo em SPD, a adubação antecipada a lanço aos 30 dias aumenta a eficiência operacional da semeadura. O uso do triturador aumenta a produção de massa seca de plantas em SPD.

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Nitrogen fertilization and potassium requirement for cereal crops under a continuous no-till system

Cited by 8 publications

References 29 publications

Nitrogen and potassium fertilization strategies in integrated systems in different black oat management on corn crop

Nitrogen and potassium fertilization strategies in integrated systems in different black oat management on corn crop

Potassium buffering capacity and corrective potassium fertilizer recommendations in soils from Southern Brazil

Adubação antecipada e formas de distribuição do fertilizante na semeadura do milho

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