Strategies to mitigate the nitrous oxide emissions from nitrogen fertilizer applied with organic fertilizers in sugarcane

Lourenço, Késia Silva; Rossetto, Raffaella; Vitti, André César; Montezano, Zaqueu Fernando; Soares, Johnny R.; Sousa, Rafael de Melo; Carmo, Janaína Braga do; Kuramae, Eiko E.; Cantarella, Heitor

doi:10.1016/j.scitotenv.2018.09.037

Cited by 33 publications

(8 citation statements)

References 47 publications

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“…The use of biotechnology has also been important in establishing the performance of micropropagated plants [92], for developing varieties that are tolerant to salt and drought [93], or genetically modified cultivars [94]. The evaluation of fertilizers [95,96], herbicides [97], soil conservation [98], and irrigation system efficiency [99] have also been important topics, as well as the use of various agricultural techniques to improve yields, such as precision agriculture [100] and remote sensing [101]. Sustainability has been also a significant research topic, for example: minimum tillage systems in sugarcane [102].…”

Section: Discussionmentioning

confidence: 99%

What Has Been the Focus of Sugarcane Research? A Bibliometric Overview

Figueroa-Rodríguez

Hernández‐Rosas

Sandoval

et al. 2019

IJERPH

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Sugarcane is one of the main crops worldwide, and it has an important impact on environmental issues. A bibliometric mapping analysis of the research on sugarcane was carried out, using data on the titles, abstracts, and keywords of articles published in leading journals and other peer-reviewed documents available in the SCOPUS database from 1858 to 2019 (27 August), and this was subsequently analyzed with the software VOSviewer. The three most important countries that publish research and were most-cited regarding sugarcane were Brazil, the USA, and India. The analysis of the co-occurrence of terms shows that the main research areas were sugarcane bagasse and terms related to bioenergy, and on a second level of relevance agronomy topics related to increasing crop yields. This first attempt to visualize the abundance of publications regarding sugarcane in their totality is in itself a good starting point for further scientific discussion.

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Section: Discussionmentioning

confidence: 99%

What Has Been the Focus of Sugarcane Research? A Bibliometric Overview

Figueroa-Rodríguez

Hernández‐Rosas

Sandoval

et al. 2019

IJERPH

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“…Digestion of slurry reduces emissions of CH 4 [13] but does not significantly reduce N 2 O emissions [14]. Vinasse is usually the by-product of sugar and ethanol production and it has also been reported to have higher N 2 O emissions than inorganic fertilizers [15,16]. Table 1.…”

Section: Introductionmentioning

confidence: 99%

High-Temperature Hay Biochar Application into Soil Increases N2O Fluxes

et al. 2020

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Biochar has been proposed as an amendment that can improve soil conditions, increase harvest yield, and reduce N losses through NO3− leaching and N2O emissions. We conducted an experiment to test the hay biochar mitigation effect on N2O emissions depending on its production temperature. The pot experiment consisted of the soil amendment with three different production temperature biochars (300 °C, 550 °C, 850 °C) alone and in combination with three different organic fertilizers (cattle slurry, slurry digestate, vinasse), in growth chamber conditions. The effects of biochar and fertilizer were both significant, but the interaction biochar:fertilizer was not. The amendment with the three fertilizer types and with the highest production temperature biochar resulted in significantly higher cumulative N2O fluxes. Biochar did not show a mitigation effect on N2O emissions when applied with organic fertilizer. Cumulative emissions were higher with biochar addition, with increasing emissions for increasing biochar production temperature. Our results support the idea that biochar cannot be considered as a universal tool for the reduction of N2O emissions.

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“…With a global warming potential (GWP) of 265 relative to CO 2 [10], nitrous oxide (N 2 O) is among the main GHG emitted from soils under sugarcane production. Several studies have indicated that N 2 O emission in sugarcane fields is primarily affected by the application of synthetic N fertilizers [11][12][13]. Other studies have also shown that the application of N fertilizer associated with the presence of organic residues increased N 2 O emissions [11,12], but the magnitude in which these emissions vary with different amounts of straw on soil surface remains poorly understood.…”

Section: Introductionmentioning

confidence: 99%

Implications of Sugarcane Straw Removal for Soil Greenhouse Gas Emissions in São Paulo State, Brazil

et al. 2019

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The use of sugarcane straw is a promising option to enhance bioenergy production. But the implications of straw removal for soil greenhouse gas (GHG) emission are not yet fully understood due to scarcity of studies under Brazilian conditions. Four field experiments were designed to assess soil N 2 O and CH 4 emissions derived from nitrogen (N) fertilization under scenarios of sugarcane straw removal in São Paulo state, Brazil. Our focus was also to derive the direct N 2 O emission factor (EF) that represents the regional conditions of sugarcane production, taking into account the data obtained from this study and those from the literature. In each field study, four straw removal rates (no removal (NR); low removal (LR)-removal of 5 Mg ha −1 ; high removal (HR)-removal of 10 Mg ha −1 ; and total removal (TR)-removal of 15 Mg ha −1) were arranged in a randomized block design. This study shows a clear evidence that CH 4 fluxes are very low for all assessed sites regardless of straw removal rates, indicating a predominance of CH 4 consumption by the soil. Cumulative N 2 O emissions ranged from 0.20 to 4.09 kg ha −1 year −1 and were significantly affected by straw removal in two sites, indicating that straw removal reduces N 2 O emissions. The average direct N 2 O EFs obtained from this study and from the literature were 0.28, 0.44, 0.70, and 0.56% for TR, HR, LR, and NR treatments, respectively, which are consistently lower than the EF of 1% suggested by the IPCC. Based on our regional-specific EF (Tier 2), the direct N 2 O emissions derived from N fertilization under scenarios of straw removal showed a reduction of at least 50% in relation to IPCC approach. Our findings are a step forward in providing regional-specific data to reduce the high level of uncertainty concerning N 2 O emission assessments of sugarcane ethanol in Brazil, but further studies are needed to evaluate how straw removal for bioenergy production and the associated changes in soil organic carbon stocks affect the GHG balance of sugarcane. Keywords Saccharum spp.. CH 4 emissions. N 2 O emissions. N 2 O emission factor. IPCC methodology. Tier 2. Crop residues

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Strategies to mitigate the nitrous oxide emissions from nitrogen fertilizer applied with organic fertilizers in sugarcane

Cited by 33 publications

References 47 publications

What Has Been the Focus of Sugarcane Research? A Bibliometric Overview

What Has Been the Focus of Sugarcane Research? A Bibliometric Overview

High-Temperature Hay Biochar Application into Soil Increases N2O Fluxes

Implications of Sugarcane Straw Removal for Soil Greenhouse Gas Emissions in São Paulo State, Brazil

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