Ammonia losses estimated by an open collector from urea applied to sugarcane straw

Mariano, Eduardo; Trivelin, Paulo César Ocheuze; Vieira, Michele Xavier; Leite, José Marcos; Otto, Rafael; Franco, Henrique Coutinho Junqueira

doi:10.1590/s0100-06832012000200010

Cited by 31 publications

(21 citation statements)

References 24 publications

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“…Emissions of N 2 O are affected by numerous factors, such as the sources and rates of N [82] and soil moisture [84] and, thus, a single emission factor cannot be applied universally to all production systems. Volatilization losses can be much higher than the value reported when urea is applied over GCTB [20,21] and can be much lower when non-amidic sources are used [20,85]. Such limitations must be considered when forming broader generalizations from the estimates shown in Fig.…”

Section: Nitrogen Losses In Sugarcane Fieldsmentioning

confidence: 94%

“…Maintaining crop residues over soil surfaces brings new challenges, however. The main difficulties caused by a thick layer of trash, when compared with sugarcane fields that were previously burned, related to the incorporation of fertilizers [19], loss of N due to NH 3 volatilization from surfaceapplied urea [20,21], and a higher incidence of pests [22]. Maintenance of trash on the soil surface may also delay sugarcane sprouting during the winter in colder regions, subsequently affecting yields [23].…”

Section: Sugarcane In Brazil: Current Scenariomentioning

confidence: 99%

See 1 more Smart Citation

Nitrogen Use Efficiency for Sugarcane-Biofuel Production: What Is Next?

Otto

Castro

Mariano³

et al. 2016

Bioenerg. Res.

102

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Land area devoted to sugarcane (Saccharum spp.) production in Brazil has increased from 2 million to 10 million ha over the past four decades. Studies have shown that, from an environmental perspective, the transformation of nitrogen (N) fertilizers into N 2 O gases can offset the advantages gained by replacing fossil fuels with biofuels. Our objectives here were to review recent developments in N management for sugarcane-biofuel production and assess estimates of N use efficiency (NUE) and N losses based on future scenarios, as well as for life-cycle assessments of bioenergy production. Approximately 60 % of N-based fertilizer applied to sugarcane fields in Brazil is recovered by plants and soils, whereas N losses to leaching and N 2 O emissions can average 5.6 and 1.84 % of the total applied N, respectively. Maintenance of trash, rotation with N-fixing legume species, and optimization of byproducts usage have potential for reducing the N requirements of sugarcane cultivation in Brazil. Moreover, the development of sugarcane genotypes with higher NUEs, along with management systems that consider soil capacity of mineralization, is required for improving the NUE of sugarcane. Strategies to maintain N as NH 4 + in sugarcane-cropped soils also have the potential to reduce N losses and enhance NUE. The development of secondgeneration biofuels is important for increasing biofuel production while simultaneously maintaining N rates and improving NUE, and sugarcane systems in Brazil show potential for sustainable biofuel production with low N rates and limited N 2 O losses. Reducing N rates in sugarcane fields is thus necessary for improving sugarcane-based biofuel production and reducing its environmental impacts.

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Section: Nitrogen Losses In Sugarcane Fieldsmentioning

confidence: 94%

Section: Sugarcane In Brazil: Current Scenariomentioning

confidence: 99%

Nitrogen Use Efficiency for Sugarcane-Biofuel Production: What Is Next?

Otto

Castro

Mariano³

et al. 2016

Bioenerg. Res.

102

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“…Os métodos de coleta do N-NH 3 volatilizado não diferiram entre si para as menores doses de ureia comercial granulada utilizadas (0 e 50 kg ha -1 de N Mariano et al (2012), ao estimarem as perdas de N provenientes da ureia aplicada sobre palhada de cana com o coletor aberto, observaram perdas de até 24% da dose aplicada.…”

Section: Resultsunclassified

“…A ureia granulada (45% N) foi aplicada superficialmente nas bandejas, de maneira homogênea, e os coletores foram instalados em seguida. Foram utilizadas quatro doses do fertilizante, correspondentes a 0; 50; 100; e 200 kg ha -1 de N. Três métodos para captura da amônia volatilizada foram avaliados: CSA, coletor com câmara semiaberta (Nômmik, 1973, adaptado por Lara Cabezas et al, 1999; Sale, coletor com câmara semiaberta livre estática (Araújo et al, 2009); e CA, coletor aberto com absorvedor envolto em película de politetrafluoretileno (Mariano et al, 2012). Os coletores foram mudados de posição a cada coleta, para evitar a formação de microclima que pudesse interferir no processo de volatilização de amônia.…”

Section: Methodsunclassified

Volatilização de amônia proveniente de fertilizantes minerais mistos contendo ureia

Gurgel

Ferrari

Fontana

et al. 2016

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi selecionar um método para estimar o N-NH 3 perdido por volatilização e determinar essas perdas em fertilizantes mistos contendo ureia. Um experimento foi realizado em casa de vegetação, em bandejas preenchidas com solo arenoso, com as doses de ureia de 0, 50, 100 e 200 kg ha -1 de N. A amônia volatilizada foi quantificada por três métodos: CSA, coletor semiaberto; Sale, coletor semiaberto livre estático; e CA, coletor aberto. Em um segundo experimento, avaliou-se a volatilização de amônia proveniente de 18 fertilizantes mistos com ureia, ácidos húmicos e zeólita, em solos com textura arenosa e argilosa, na dose de 200 kg ha -1 de N. O CSA foi o método que recuperou mais N, seguido do Sale e do CA. O Sale é mais adequado para experimentos com elevado número de unidades amostrais, por ser mais prático. Os fertilizantes minerais mistos com ureia e ácido húmico (5 e 10%) e com ureia e zeólita (10%) apresentaram os melhores resultados na mitigação da volatilização da amônia, com redução nas perdas de N-NH 3 de até 38%. Os tratamentos são mais efetivos no combate à volatilização no solo de textura arenosa.Termos para indexação: ácidos húmicos, coletores semiabertos, fertilizantes nitrogenados, fertilizantes organominerais, perdas de N, zeólita. Ammonia volatilization from mixed mineral fertilizers containing ureaAbstract -The objective of this work was to select a method for estimating N-NH 3 lost by volatilization and to determine these losses in mixed fertilizers containing urea. An experiment was conducted in a greenhouse in trays filled with sandy soil, with urea rates of 0, 50, 100, and 200 kg ha -1 N. Volatilized ammonia was quantified by three methods: CSA, semi-open collector; Sale, free and static semi-open collector; and CA, open collector. In a second experiment, volatilization of ammonia from 18 fertilizers mixed with urea, humic acids, and zeolite was evaluated in sandy and clayey soils, at 200 kg ha -1 N. CSA was the method with the highest N recovery, followed by Sale and CA. Sale is more suited for experiments with a high number of experimental units, since it is more practical. The mixed fertilizers with urea and humic acids (5 and 10%) and with urea and zeolite (10%) had the best results in the mitigation of ammonia volatilization, reducing N-NH 3 losses in up to 38%. The treatments are more effective in mitigating volatilization losses in the sandy soil.

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“…The most used fertilizer is urea. However, from all nitrogen applied to sugarcane as fertilizer, only 20-40% are actually recovered by the crop, which negatively affects production costs and the environment (Mariano et al, 2012;Vieira Megda et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Stalk yield and nitrogen (15N) recovery of irrigated sugarcane during the plant-cane cycle using urea

Bastos¹,

Teixeira²,

Silva³

et al. 2017

Aust J Crop Sci

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Sugarcane is the most promising among crops that produce renewable biofuels. An adequate availability of water and nutrients, especially nitrogen (N), is of utmost importance. The objective of this study was to evaluate stalk yield and the recovery of N-urea by sugarcane (plant-cane) subjected to different levels of water replacements and nitrogen fertilization doses using the 15 N isotopic dilution technique. The experiment was conducted in the southwest region of the state of Goiás, Brazil, using plastic pots. The experimental design was complete randomized blocks analyzed in 3 × 3 split plots with three replications. The treatments consisted of three levels of water replacements (75, 50 and 25%) and three N doses (60, 120 and 180 kg ha-1) in the form of enriched 15 N urea. N doses did not affect stalk yield, probably because 91.14% of all N accumulated in culms came from the soil and other sources. The rainfall (1,194.2 mm) was sufficient to meet the water requirements of the crop. The recovery of N-urea was not influenced by the N doses and represented on average of 20.5% of the total amount applied. The soil and other sources were the main providers of N to sugarcane plants regardless of the mineral-N dose applied.

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Ammonia losses estimated by an open collector from urea applied to sugarcane straw

Cited by 31 publications

References 24 publications

Nitrogen Use Efficiency for Sugarcane-Biofuel Production: What Is Next?

Nitrogen Use Efficiency for Sugarcane-Biofuel Production: What Is Next?

Volatilização de amônia proveniente de fertilizantes minerais mistos contendo ureia

Stalk yield and nitrogen (15N) recovery of irrigated sugarcane during the plant-cane cycle using urea

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