Postharvest nitrous oxide emissions from a subtropical oxisol as influenced by summer crop residues and their management

Escobar, Luisa Fernanda; Amado, Telmo Jorge Carneiro; Bayer, Cimélio; Chávez, Luis Fernando; Zanatta, Josiléia Acordi; Fiorin, Jackson Ernani

doi:10.1590/s0100-06832010000200024

Cited by 30 publications

(27 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In contrast, Escobar et al (2010) concluded that after the harvest, cumulative soil N 2 O emissions from soybean ecosystems were higher in the no-tillage treatment compared with the conventional tillage treatment. Escobar et al (2010) argued that the increased soil moisture in the no-tillage treatment increased the amount of denitrifying activity and consequent N 2 O production. Other studies have found no significant effect of tillage on N 2 O production from soybean crops (Parkin and Kaspar 2006;Jantalia et al 2008).…”

Section: Tillagementioning

confidence: 88%

“…Some research has been conducted into the effects of residue removal and/or incorporation of crop residues into soils on postharvest N 2 O emissions. However, the results of these studies exploring residue management options were extremely varied (e.g., Malhi et al 2006;Delgado et al 2010;Escobar et al 2010). A recent study focusing on the biotechnology has suggested that the use of the enzyme that reduces N 2 O has a crucial role in reducing atmospheric N 2 O levels (Richardson et al 2009).…”

Section: A New Methods For Mitigation Of Postharvest N 2 O Emissions Fmentioning

confidence: 99%

“…2011 in peer-reviewed journals (Table 1). N 2 O emissions in these studies were shown only in graphic form, except for the study of Escobar et al (2010). These data presented in graphic form were digitized using the Simple Digitizer software, ver.…”

Section: Nodule Decomposition In Soybeans and N 2 O Emissionsmentioning

confidence: 99%

See 2 more Smart Citations

Mitigation of postharvest nitrous oxide emissions from soybean ecosystems: a review

Uchida

Akiyama

2013

Soil Science and Plant Nutrition

View full text Add to dashboard Cite

In this review, the current knowledge of nitrous oxide (N 2 O) emissions from soybean (Glycine max (L.) Merr.) ecosystems, particularly on postharvest N 2 O emissions, is summarized and controlling factors of postharvest N 2 O emissions from soybean ecosystems are discussed. A new biological method to mitigate N 2 O emission is also presented. The latest (2006) guidelines of the Intergovernmental Panel on Climate Change (IPCC) concluded that N 2 O emissions derived directly from biological nitrogen (N) fixation were not significant in legume crop ecosystems. The default N 2 O emission factor from biological N fixation was revised to zero, whereas the default N 2 O emission factor for the decomposition of legume crop residues (postharvest N 2 O emissions) was the same as that for nonlegume crop residues (1%). From previously measured field data, the percentage of N in soybean residue emitted as N 2 O after harvest was calculated to determine emission factors. Values ranged from 0.0-10.0% (average 1.3% ± 2.7%, median: 0.2%), indicating relatively low emission factors. The average emission factor calculated for N 2 O emissions from N in soybean residues was slightly higher than the default emission factor for N in crop residue specified in the guidelines. However, the volume of field-measured postharvest N 2 O emissions in soybean ecosystems is low compared with data for N 2 O emissions during the crop growing season. Previous field-measured data demonstrated that N 2 O emissions often peaked sharply immediately after the harvest. However, values for N 2 O fluxes in the currently available field data were determined on a weekly or monthly basis. This large time gap between samplings may have resulted in underestimation of postharvest N 2 O emissions in soybean ecosystems. More detailed field studies on postharvest N 2 O emissions from soybean ecosystems are needed. Nodule decomposition is the major source of postharvest N 2 O emissions in soybean ecosystems. A new microbiological method was recently developed to mitigate postharvest N 2 O emissions from soybean ecosystems utilizing N-fixing bacteria with increased N 2 O-reducing activity (increased expression of nosZ). This approach may potentially be applied to other leguminous crops and non-legume ecosystems. Ongoing research on the relationships between soil N 2 O emissions and nosZ may reveal a new method for N 2 O mitigation in the future.

show abstract

Section: Tillagementioning

confidence: 88%

Section: A New Methods For Mitigation Of Postharvest N 2 O Emissions Fmentioning

confidence: 99%

See 1 more Smart Citation

Mitigation of postharvest nitrous oxide emissions from soybean ecosystems: a review

Uchida

Akiyama

2013

Soil Science and Plant Nutrition

View full text Add to dashboard Cite

show abstract

“…Thus, the N fertilizer efficiency is increased Singh et al, 2006;Li et al, 2010), promoting higher economic revenue at a lower environmental impact (Gregoret et al, 2006). When N fertilization rates exceed the crop demand, they can increase the soil N-NO 3 -content and therefore increase the risk of N losses through denitrification (Fernandes & Libardi, 2007;Escobar et al, 2010) or leaching (Sangoi et al, 2003;Ceretta et al, 2005;Fernandes & Libardi, 2007).…”

Section: Introductionmentioning

confidence: 99%

Optical crop sensor for variable-rate nitrogen fertilization in corn: II - indices of fertilizer efficiency and corn yield

Bragagnolo¹,

Amado

Nicoloso

et al. 2013

Rev. Bras. Ciênc. Solo

Self Cite

View full text Add to dashboard Cite

SUMMARYGenerally, in tropical and subtropical agroecosystems, the efficiency of nitrogen (N) fertilization is low, inducing a temporal variability of crop yield, economic losses, and environmental impacts. Variable-rate N fertilization (VRF), based on optical spectrometry crop sensors, could increase the N use efficiency (NUE). The objective of this study was to evaluate the corn grain yield and N fertilization efficiency under VRF determined by an optical sensor in comparison to the traditional single-application N fertilization (TSF). With this purpose, three experiments with no-tillage corn were carried out in the 2008/09 and 2010/11 growing seasons on a Hapludox in South Brazil, in a completely randomized design, at three different sites that were analyzed separately. The following crop properties were evaluated: aboveground dry matter production and quantity of N uptake at corn flowering, grain yield, and vegetation index determined by an N-Sensor ® ALS optical sensor. Across the sites, the corn N fertilizer had a positive effect on corn N uptake, resulting in increased corn dry matter and grain yield. However, N fertilization induced lower increases of corn grain yield at site 2, where there was a severe drought during the growing period. The VRF defined by the optical crop sensor increased the apparent N recovery (NRE) and agronomic efficiency of N (NAE) compared to the traditional fertilizer strategy. In the average of sites 1 and 3, which were not affected by (1)

show abstract

“…A quantidade de N 2 O produzido em sistemas agrícolas é determinada pela disponibilidade de NO 3 - (Bouwman, 1996;Brown et al, 2000;Maggiotto et al, 2000), temperatura (Castaldi, 2000), pH (Daum & Schenk, 1998;Mogge et al, 1999), umidade (Zheng et al, 2000;Dobbie & Smith, 2003), além do material orgânico prontamente decomponível e das condições limitantes de difusão de O 2 (Mosier et al, 1991 Nesse contexto, o crescimento do setor agropecuário com a conversão da vegetação nativa em diferentes formas de uso da terra, é necessário conhecer as fontes emissoras dos GEE a fim de colaborar com um diagnóstico mais exato para as tomadas de decisões mitigadoras do aquecimento global. Contudo, a maioria dos estudos envolvendo o fluxo desses gases do solo para a atmosfera estão concentrados na região Sul do Brasil, comparando sistemas de cultivos (La Scala Junior et al, 2001;Costa et al, 2008a;Jantaia et al, 2008;Barreto et al, 2009;Gomes et al, 2009;Siqueira Neto et al, 2009;Escobar et al, 2010) e o fluxo de CH 4 em cultivos de arroz irrigado por inundação (Agostinetto et al, 2002;Costa et al, 2008b), assim como na Amazônia, comparando a transição floresta-pastagem (Steudler et al, 1996;Mellilo et al, 2001;Garcia-Montiel et al, 2002;Fernandes et al, 2002;Passianoto et al, 2003;Carmo et al, 2005;Neill et al, 2005;Wick et al, 2005).…”

Section: Introductionunclassified

Emissão de gases do efeito estufa em diferentes usos da terra no bioma Cerrado

Neto

Píccolo

Costa

et al. 2011

Rev. Bras. Ciênc. Solo

View full text Add to dashboard Cite

show abstract

Postharvest nitrous oxide emissions from a subtropical oxisol as influenced by summer crop residues and their management

Abstract: SUMMARY

Cited by 30 publications

References 30 publications

Mitigation of postharvest nitrous oxide emissions from soybean ecosystems: a review

Mitigation of postharvest nitrous oxide emissions from soybean ecosystems: a review

Optical crop sensor for variable-rate nitrogen fertilization in corn: II - indices of fertilizer efficiency and corn yield

Emissão de gases do efeito estufa em diferentes usos da terra no bioma Cerrado

Contact Info

Product

Resources

About