Efficiency of Utilization of Nitrogen Coated with Urease Inhibitor in Maize

Okumura, Ricardo Shigueru; C, Mariano Dde; Pv, Zaccheo; An, de Albuquerque; Cg, Giebelmeier; Lobato, Allan Klynger da Silva; Aa, Franco; Neto, C. F. Oliveira; Ec, Saldanha; He, da Conceição; Silva, Raimundo Thiago Lima da

doi:10.3923/pjbs.2013.871.876

Cited by 3 publications

(3 citation statements)

References 30 publications

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“…However, the constant training of farmers can boost incomes, and improve their lives and the rural economy. According to the interviewees in the region, most farmers use N by 40%, then phosphorus is the second usual fertilizer at 25% and the third is the compound fertilizer NPK, the least used fertilizers in the region are potassium and organic fertilizers such as straw and vegetable remains, ilustread in Fig 3 . Our study corroborated that obtained by Okumura et al,( 2013), which pointed out the importance of N being the primary macronutrient most required by maize, for this reason, most of the time it is the one that limited the grain productivity. Our studies corroborated those obtained by Jin et al,(2012) carried out a long experiment which illustrated that the compound compost fertilizer like N, P, and K fertilizers could sustain soil yields and productivity.…”

Section: Pfpn= Grain Yield/n Application Amountsupporting

confidence: 91%

Effects of nitrogen fertilizer management on maize yield and nitrogen use efficiency: Based on farmer Survey in Quzhou county, North China Plain

2022

JBAH

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The farmer survey was conducted in Quzhou county, Hebei province of China in three villages (Wang Zhuang, Xing yuan, and Sitton) with the objectives of elucidating the effects of nitrogen fertilizer (N) on maize production and nitrogen use efficiency (NUE). A total of 61 maize producers were randomly selected and interviewed. The educational level result revealed that about 8% of sampled farmers have no formal education, 11.6% have a basic level education, 21.6% have completed the middle-level education, and 58.3% have upperlevel education. Most producers use nitrogen (40%), then phosphorus fertilizer (25%), and thirdly the compound fertilizer NPK, the least used fertilizers in the region are potassium and organic fertilizers such as straw and vegetable remains. The farmer applies twice, at base planting and in vegetative tasselling (VT), also, fertilizer N is the most used by farmers, whose application rates were higher ranging from 375 kg ha -1 representing 49.2%, followed by 300 kg ha -1 representing 39.3%, and finally, a small number of producers apply 225 kg ha -1 of fertilizer which represents 11.5%. The yield of maize was around 6443.3 kg ha -1 in the region, it was observed that the partial factor productivity of nitrogen remains low as compared with the optimal N management, the value was 20.4 kg kg -1 , and the rates of cost fertilizer was 125￥ 50 kg -1 . We can conclude that the low cost of N and less knowledge of fertilizer management is the motivation for excessive utilization. However, regular training of producers can help adopt good practices of optimal N management, minimize environmental risks, and can save money, and reduce the cost of production.

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Section: Pfpn= Grain Yield/n Application Amountsupporting

confidence: 91%

Effects of nitrogen fertilizer management on maize yield and nitrogen use efficiency: Based on farmer Survey in Quzhou county, North China Plain

2022

JBAH

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“…Lopes & Sa (2009) trabalhando com a cultivar Santa Cruz 47 observaram que o aumento da dose de nitrogênio utilizada proporcionou aumento linear do número de frutos de quiabo por planta, no entanto, doses maiores que 42 kg.ha -1 de nitrogênio ocasionavam redução da produtividade, de maneira semelhante ao que foi constatado no presente trabalho. Okumura et al (2013), avaliando a eficiência no uso da ureia convencional e ureia revestida com inibidor de urease na cultura do milho verificaram que os níveis crescentes de N, independentemente da fonte utilizada, resultaram em uma diminuição dos ganhos de eficiência agronômica e fisiológica do nutriente. Qiao et al (2012) avaliando a redução da adubação nitrogenada na cultura do arroz por dois anos consecutivos, verificaram que elevadas doses de nitrogênio reduziram a eficiência de uso no nutriente, sendo que deduções de até 14% em relação as doses comumente utilizadas pelos produtores não afetavam o rendimento de grãos.…”

Section: Resultsunclassified

rtilizante nitrogenado de liberação controlada nas características agronômicas... EFICIÊNCIA DO FERTILIZANTE NITROGENADO DE LIBERAÇÃO CONTROLADA NAS CARACTERÍSTICAS AGRONÔMICAS E PRODUÇÃO DE SEMENTES DO QUIABEIRO

Alves

Kondo²,

Rodrigues³

et al. 2018

RBAS

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RESUMO -A produção de sementes de quiabo em quantidade e qualidade demanda adubações nitrogenadas frequentes, cujas perdas podem ser reduzidas com fertilizantes de liberação controlada. Nesse sentido, foram avaliadas as características agronômicas e a produção de quiabo cultivar Santa Cruz 47 após a adubação nitrogenada com ureia de liberação controlada e ureia convencional. Utilizou-se o delineamento em blocos ao acaso, com quatro repetições e tratamentos arranjados em esquema fatorial 2x5+2, sendo duas fontes de nitrogênio (ureia convencional e ureia com polímero de liberação controlada) e cinco doses de adubação (48, 72, 96, 120 e 144 kg.ha -1 ), mais dois tratamentos testemunhas (sem aplicação de nitrogênio e uma fonte de ureia com polímero de liberação controlada com 100% de ureia revestida). As variáveis analisadas foram a altura final de plantas, altura de inserção do primeiro fruto, número de frutos por planta, número de dias da antese a colheita, produtividade de sementes. O uso de ureia com polímero de liberação controlada em solos com elevado teor de matéria orgânica retarda a ocorrência do estádio fenológico de colheita dos frutos destinados à produção de sementes. A produção de frutos por plantas e a produtividade de sementes foram reduzidas com o aumento das doses de nitrogênio aplicadas.Palavras chave: Abelmoschus esculentus, adubação nitrogenada, tecnificação na agricultura.ABSTRACT -The quality and quantity of okra seed production demand much nitrogen fertilization, whose losses can be decrease with controlled-released sources. In this sense, we evaluated agronomic characteristics and yield of okra cultivar Santa Cruz 47 after nitrogen fertilization with controlled-released and conventional urea. A randomized block design was used with four replications and 2x5+2 factorial arrangement, involving two nitrogen sources (conventional and controlled-released urea) and five nitrogen levels (48, 72, 96, 120 and 144 kg.ha -1 ), more two control treatments (without nitrogen application and a 100% controlled-released urea). We analyzed final plant height, insertion height of first fruit, number of fruits per plant, number of

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“…However, early N loss can cause insufficiency at critical crop stages, reducing EL and ED and possibly reflecting in lower yields. According to Okumura et al (2013), high N levels applied to the soil have lower recovery and hence increasing chances of loss. However, splitting urea (Davies et al, 2020) and using NI and UI (Cantarella et al, 2018), even at higher levels, show higher recovery (Okumura et al, 2013), thus explaining the higher ear lengths and diameters observed in our study.…”

Section: Ear Length and Diametermentioning

confidence: 99%

Stabilized urea for maize grown on an Amazonian Cerrado soil

Castro,

Rocha,

Barreto

et al. 2023

Agronomy Journal

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Urea splitting and use of stabilized ureas in corn (Zea mays L.) crops are management strategies that increase urea efficiency and reduce nitrogen (N) losses by volatilization and leaching. This study aimed to evaluate the effects of urea stabilized with urease inhibitor and nitrification inhibitor compared to conventional urea applied at three different schedules on corn grain yield and the dynamics of inorganic nitrogen in an area of the Amazonian Cerrado, Brazil. Two experiments were carried out, one in 2019 and the other one in 2021, in a randomized block design, with 4 replications. Treatments were arranged in a factorial scheme (3 × 3), with three types of urea (urea ‐ U, with urease inhibitor ‐ UI and with nitrification inhibitor ‐ NI) and three application schedules (100% at planting, 30% at planting and 70% as topdressing; 30% at planting and two topdressings with 35% N). In 2019, compared to U and UI, NI increased corn yield when 100% of urea was applied at planting. Regardless of the splitting management, NI ensured the same yields. In 2021, urea splitting was required to improve corn yields, and UI promoted higher yield in all urea application schedule. In 2019 and 2021, both NI and UI, respectively, ensured higher inorganic N levels in the soil, especially after the first topdressing. These N contents reflected in yield gains. Urea with nitrification or urease inhibitor may be a relevant option for managing nitrogen fertilization in corn crops in the Amazonian Cerrado.This article is protected by copyright. All rights reserved

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Efficiency of Utilization of Nitrogen Coated with Urease Inhibitor in Maize

Cited by 3 publications

References 30 publications

Effects of nitrogen fertilizer management on maize yield and nitrogen use efficiency: Based on farmer Survey in Quzhou county, North China Plain

Effects of nitrogen fertilizer management on maize yield and nitrogen use efficiency: Based on farmer Survey in Quzhou county, North China Plain

rtilizante nitrogenado de liberação controlada nas características agronômicas... EFICIÊNCIA DO FERTILIZANTE NITROGENADO DE LIBERAÇÃO CONTROLADA NAS CARACTERÍSTICAS AGRONÔMICAS E PRODUÇÃO DE SEMENTES DO QUIABEIRO

Stabilized urea for maize grown on an Amazonian Cerrado soil

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