Polímeros orgânicos com ureia dissolvida e doses de nitrogênio no milho

Petean, Ciro Corte; Filho, Marcelo Carvalho Minhoto Teixeira; Galindo, Fernando Shintate; Buzetti, Salatiér; Malmonge, José Antônio; Malmonge, Luiz Francisco

doi:10.22491/rca.2019.2761

Cited by 2 publications

(1 citation statement)

References 29 publications

(40 reference statements)

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“…Currently, there is a need to produce better quality food, minimize operating costs, reduce soil movement, combine less polluting technologies and combine meteorological factors with management in agroecosystems, (Camponogara et al, 2016;Mammann et al, 2020). Among the inputs used in agriculture, nitrogen fertilizers are the ones that most burden and pollute soil and water, with high production costs and reduced efficiency due to volatilization and leaching losses (Arenhardt et al, 2017;Petean et al, 2019). The high demand for nitrogen in non-leguminous crops such as corn, wheat and rice, generates a demand of almost 50% of all nitrogen fertilizer produced in the world (Tasca et al, 2011;Ladha et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Research Article The supply of nitrogen fertilizer in wheat to the highest environmental quality with satisfactory yield

Trautmann¹,

Silva²,

Rosa³

et al. 2021

Genet. Mol. Res.

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The management of nitrogen in wheat based on biological and environmental indicators can ensure productivity with a reduction in environmental impact. The objective of the study was to develop a more sustainable management of nitrogen use in wheat, considering the dose as a fraction of the total supply based on an estimate of the maximum technical and economic efficiency, and expected grain yield, in systems of succession of high and reduced release of N-residual, during acceptable and unfavorable crop years. The study was conducted from 2012 to 2018, in Augusto Pestana, RS, Brazil. Two experiments were conducted in each agricultural year and in each rotation system (soybean/wheat and corn/wheat), one to quantify the biomass yield and the other to determine grain yield. The experimental design was a randomized block with four repetitions in a 5 x 3 factorial, for doses of N-fertilizer (0, 30, 60, 90, 120 kg ha -1 ) and ways of supplying the nutrient [full condition (100%) at the phenological stage V 3 (third expanded leaf); fractionated (70%/30%) at phenological stage V 3 /V 6 (third and sixth expanded leaf) and fractionated (70%/30%) at phenological stage V 3 /R 1 (third expanded leaf and ear differentiation)], in the ©FUNPEC-RP www.funpecrp.com.br Genetics and Molecular Research 20 (3): gmr18903 A.B.P. Trautmann et al. 2soybean/wheat and corn/wheat succession systems with high and reduced N-residual release, respectively. More efficient use of nitrogen was obtained based on wheat grain productivity when applied at the full dose at the third expanded leaf stage. The supply of the maximum dose of nitrogen with an expectation of 3 t ha -1 ensures satisfactory productivity with reduced nutrient losses to the environment, especially in unfavorable years for cultivation, regardless of the succession system.

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Section: Introductionmentioning

confidence: 99%

Research Article The supply of nitrogen fertilizer in wheat to the highest environmental quality with satisfactory yield

Trautmann¹,

Silva²,

Rosa³

et al. 2021

Genet. Mol. Res.

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Respostas fisiológicas e enzimáticas no milho sob diferentes concentrações de nitrogênio

Neto,

Rodrigues,

Cazetta

et al. 2023

Rev. Ciênc. Agrovet.

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O estudo de aspectos químicos e bioquímicos associados ao desenvolvimento das diferentes partes das plantas permite a observação e o entendimento de uma série de reações que levam à produção de fitomassa e grãos pela cultura de milho. Assim, objetivou-se estudar a diferença na eficiência de uso do nitrogênio nas raízes e parte aérea em dois genótipos de milho, na fase inicial de crescimento das plantas e avaliar as respostas bioquímico-fisiológicas desses órgãos quando as plantas são submetidas a distintas doses de N em condições hidropônicas. O experimento foi realizado em casa de vegetação, em solução nutritiva por 20 dias, com dois genótipos (AS1522 e AS1596) submetidos a quatro concentrações de N (zero; 112; 224 e 448 mg dm-3). O delineamento utilizado foi em inteiramente casualizado com três repetições. Houve diferença entre os genótipos estudados para as variáveis biométricas, massa de matéria seca, acúmulo de N e aminoácidos livres totais na parte aérea das plantas. Na raiz, a atividade da redutase do nitrato foi a variável que diferenciou a eficiência no uso do nitrogênio entre os genótipos. O genótipo AS1596 é mais eficiente no uso do nitrogênio.

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Polímeros orgânicos com ureia dissolvida e doses de nitrogênio no milho

Cited by 2 publications

References 29 publications

Research Article The supply of nitrogen fertilizer in wheat to the highest environmental quality with satisfactory yield

Research Article The supply of nitrogen fertilizer in wheat to the highest environmental quality with satisfactory yield

Respostas fisiológicas e enzimáticas no milho sob diferentes concentrações de nitrogênio

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