Effect of nitrogen rates applying controlled-release and conventional urea blend in maize

Garcia, Pedro Lopes; Sermarini, Renata Alcarde

doi:10.1080/01904167.2019.1658778

Cited by 15 publications

(15 citation statements)

References 21 publications

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“…The response of maize crops to N is driven by the complex interaction of edaphic and climate conditions. One of the reasons speculated for the low response of blends by crops is the adequate N provided by the soil through organic N mineralization ( de Almeida et al., 2019; Garcia et al., 2018; 2019a). Moreover, the soil chosen in this study that had negligible mineral N levels contributed minimally to maize nutrition.…”

Section: Discussionmentioning

confidence: 99%

“…(2019b), the use of a blend containing 70% controlled‐release urea and 30% urea led to higher maize dry mass and N accumulation than uncoated urea. However, with the same blend in two contrasting soils, a low N fertilization response was found due to high organic N mineralization ( Garcia et al., 2019a). The field trial results showed that a mixture of controlled‐release fertilizers and uncoated urea improved the crop yield and nitrogen use efficiency while decreasing the cost of fertilizer and the labor required for fertilizer application ( Rubin et al., 2016; Zheng et al., 2017, 2016b, 2016a; Gagnon et al., 2019).…”

Section: Discussionmentioning

confidence: 99%

“…Blends may increase the crop yield, although the yield varies according to the year of cultivation ( Noellsch et al., 2009; Guo et al., 2017; Zheng et al., 2017) and the ratio ( Guo et al., 2017) and the types of N fertilizers used ( Zheng et al., 2016a, 2016b). However, in some studies, the use of blends did not lead to gains in maize yields ( de Almeida et al., 2019) or other studied parameters, such as the dry mass and N accumulation ( Garcia et al., 2019a). Hence, the discrepancy in the results on the use of blends raises uncertainties about the feasibility of their adoption in agriculture, and this subject deserves more investigation.…”

Section: Introductionmentioning

confidence: 99%

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Fertilizing maize croppings with blends of slow/controlled‐release and conventional nitrogen fertilizers

Andrade

Guelfi

Chagas

et al. 2021

J. Plant Nutr. Soil Sci.

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Background: Blends of controlled‐release and slow‐release urea may help to synchronize N release from fertilizers and N uptake by maize to improve the plant nitrogen use efficiency. Aim: We aimed to investigate the effects of slow‐release urea and controlled‐release urea and their blends with uncoated urea to release N for maize uptake over time in comparison to urea and ammonium nitrate. Methods: The experiment was performed under greenhouse conditions, and the treatments consisted of conventional urea, ammonium nitrate, three controlled‐release ureas (Multicote 4M®, Nitrocote®, and polyurethane‐coated urea), one slow‐release urea, and mixtures of controlled‐ release urea and slow‐release urea with uncoated urea. These treatments were applied at concentrations of 0, 150, 300, and 450 mg N kg−1 of soil. We evaluated the dry mass, nitrogen accumulation in the shoots, agronomic efficiency index and applied nitrogen recovery after each of three maize croppings. Furthermore, we characterized the N release pattern of the controlled‐release ureas and their coating thicknesses by using scanning electron microscopy. Results: The N release curves showed that Multicote 4M®, Nitrocote® and urea + polyurethane reached 80% of the N released in water at 40°C at 36, 30, and 13 d after incubation. The highest cumulative nitrogen accumulation (1127.4 mg pot−1), agronomic efficiency index (122.3%), and applied nitrogen recovery (69.3%) occurred with ammonium nitrate, with a low residual effect of only 25.4% of the total N accumulated after 35 d of cultivation. The highest cumulative dry mass was produced when the maize was fertilized with a blend in which 40% of the N came from Nitrocote® (44.8 g pot−1). Conclusions: The results showed that ammonium nitrate is an important option as an N source, but it has no residual effect. Controlled‐ release ureas and their blends have a delayed N release and promote constant N uptake after 70 d. After 70 d, the applied N rates were also more important than the N fertilizer technologies. An adequate mixture of N fertilizers could be an interesting option to help synchronize N release and uptake by maize. Technologies involving urea blends could be an option to improve the nitrogen use efficiency in comparison to that obtained by using uncoated urea while decreasing costs in comparison with the application of 100% controlled‐release urea or slow‐release urea.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Fertilizing maize croppings with blends of slow/controlled‐release and conventional nitrogen fertilizers

Andrade

Guelfi

Chagas

et al. 2021

J. Plant Nutr. Soil Sci.

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“…Технології застосування добрив мають ще багато не досліджених нюансів, серед яких першочергове значення сумісність добрив, гуматів і мікродобрив і реакція ґрунтового розчину [3,7,12].…”

Section: вступunclassified

Особливості Управління Врожайністю Кукурудзи В Умовах Нестійкого Зволоження

Маренич¹,

Капленко²,

Коба³

et al. 2019

visnyk

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У трирічному виробничому експерименті досліджувалися особливості формування врожайності кукурудзи: аналіз урожайності в сівозміні; вплив передпосівної обробки насіння; вплив системи удоб-рення, густоти сівби та швидкості руху посівного агрегату на врожайність. Встановлено, що за-стосування органічних добрив у вигляді гною великої рогатої худоби в кількості 50 т/га компенсує негативний вплив небажаного попередника, наприклад, соняшнику, під який ця норма вноситься.Урожайність кукурудзи в такому разі була найбільшою і становила 9,7 … 11,1 т/га, показники вро-жайності після пшениці становили 9,4 … 10,5 т/га. В умовах використання великої кількості добрив,особливо застосування гною великої рогатої худоби, попередники неістотно впливають на форму-вання врожайності зерна. Зокрема врожайність гібридів кукурудзи ТМ Pioneer після пшениці озимоїстановила в середньому 9,83 т/га, а після соняшнику – 10,2 т/га, що має різницю лише 3,7 %. Найме-ншу врожайність отримано в разі розміщення кукурудзи після посівів цієї ж культури на зерно тасилос – відповідно 9,3 та 9,57 т/га. Найменша врожайність спостерігалася в повторних посівах ку-курудзи, що підтверджують узагальнені попередні дослідження. Встановлено, що за умови інтенси-вного забезпечення посівів органо-мінеральними добривами гібриди кукурудзи реалізують свій гене-тичний потенціал незалежно від умов року вирощування. Використання норми азотних добрив у кі-лькості 150 кг/га виявилося найефективнішим незалежно від умов року вирощування. Ефективнимприйомом управління врожайністю кукурудзи є передпосівна обробка насіння сумішшю протруйниківі гумінових стимуляторів, що сприяє кращому формуванню кореневої та надземної частини й даєзмогу більшою мірою контролювати ураження проростків хворобами. В умовах нестійкого зволо-ження найбільша врожайність досягнута за норм висіву 80 … 85 тис. насінин на 1 га, проте нормивисіву доцільно обґрунтовувати економічно. Оптимальною швидкістю руху агрегату для сівби куку-рудзи є 10 км/год. Зменшення чи збільшення цього параметру призводило до зменшення врожайності,що пояснюється нерівномірним розподілом насіння та неоднаковою глибиною його розміщення у ґру-нті. Швидкість руху необхідно встановлювати залежно від технічних характеристик агрегату тастану ґрунту на момент сівби.

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“…By mixing CRU and normal urea at an appropriate ratio, rapid‐effective and slow‐released N could be combined to match crop N demand throughout the entire growing season, even under the adverse environments, and the total cost is also reduced due to decreased CRU rate and unrequested topdressing. This method has been considered as a better N management strategy for maize in China (Guo et al., 2017; Wang et al., 2015; Zheng et al., 2016) and Brazil (Garcia et al., 2018, 2019), and for other crops worldwide (Farmaha & Sims, 2013; Grant et al., 2012; Zhu & Zhang, 2017). Previous studies mainly focused on the effects of CRU mixture ratio on crop yield, economic benefit, and NUE, and determined the optimal CRU mixture ratio for maize as 30% at 180 kg N ha −1 in Northeast China and about 70% at 180 kg N ha −1 in Northwest China and Brazil.…”

Section: Introductionmentioning

confidence: 99%

Mixture of controlled‐release and normal urea to improve nitrogen management for maize across contrasting soil types

Yin

et al. 2020

Agronomy Journal

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Mixed application of controlled‐release and normal urea (MCU) is considered as a promising alternative to farmers’ practice with one‐time nitrogen fertilization (FP) and optimal split nitrogen fertilization (OPT). In this study, MCU effectiveness on maize (Zea mays L.) were investigated by conducting 2‐yr field experiments on sandy and clay soils. Across the 2 yr, grain yields in MCU increased by 22 and 18% relative to FP on sand and clay soils, respectively, and net returns increased by 65 and 19%, respectively, while total N losses reduced by 228 and 193 kg N ha−1, respectively. In general, MCU showed significant advantages in agronomic, economic, and environmental benefits relative to FP across soil types, and the advantages were more remarkable on sandy soil. Although OPT also showed better effectiveness relative to FP, while its performances were similar to MCU on clay soil but slightly less effective on sandy soil. Compared to FP, the lower N rate and optimized N management in MCU and OPT effectively reduced N loss and ensured sufficient soil N availability to meet maize N demand at the later growth stage, accumulated more dry matter (DM) and N in plants that associated with larger post‐silking ratios, and consequently improved grain yield and nitrogen recovery efficiency (REN). Our results demonstrated that MCU is an effective and promising method to concurrently meet smallholders’ requirement for simplified fertilization and the optimal N management strategy, could replace OPT as an optimal N management method for maize on both two soil types, especially on sandy soil.

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Effect of nitrogen rates applying controlled-release and conventional urea blend in maize

Cited by 15 publications

References 21 publications

Fertilizing maize croppings with blends of slow/controlled‐release and conventional nitrogen fertilizers

Fertilizing maize croppings with blends of slow/controlled‐release and conventional nitrogen fertilizers

Особливості Управління Врожайністю Кукурудзи В Умовах Нестійкого Зволоження

Mixture of controlled‐release and normal urea to improve nitrogen management for maize across contrasting soil types

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