Biological nitrogen fixation and soil N2O emissions from legume residues in an Acrisol in SE Brazil

Sant'Anna, Selenobaldo Alexinaldo Cabral; Martins, Moisés Rodrigues; Goulart, Jhonatan Marins; Araújo, Suellen Nunes de; Araújo, Ednaldo da Silva; Zaman, Mohammad; Jantalia, Cláudia Pozzi; Alves, B. J. R.; Boddey, Robert M.; Urquiaga, Segundo

doi:10.1016/j.geodrs.2018.e00196

Cited by 23 publications

(17 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Possibly, N released in intercropping treatments was efficiently absorbed by the main crop, even though intercropping did not lead to significantly higher maize grain yields in our experiment. Alternatively, changes in physicochemical conditions brought about by intercrops, such as potentially lower soil moisture due to more evapotranspiration, may have counteracted the commonly observed stimulating effect of legume N on N 2 O emissions (Almaraz et al, 2009;Sant'Anna et al, 2018).…”

Section: Total Non-co 2 Ghg Emissionsmentioning

confidence: 99%

“…Intercropping and mulching may also affect the soil's capacity to oxidize atmospheric CH 4 as abundant NH + 4 might inhibit methanotrophs (Laanbroek and Bodelier, 2004). However, field studies with the incorporation of leguminous or non-leguminous catch crops have been inconclusive (e.g., Sanz-Cobena et al, 2014). In a meta-study on CH 4 fluxes in non-wetland soils, Aronson and Helliker (2010) concluded that N inhibition of CH 4 uptake is unlikely at fertilization rates below 100 kg N ha −1 yr −1 and that, much to the contrary, N addition may stimulate CH 4 uptake in N-limited soils.…”

Section: Introductionmentioning

confidence: 99%

“…However, combining easily degradable crop residues with synthetic N can lead to elevated N 2 O emissions (Baggs et al, 2000), potentially compromising the environmental friendliness of intercropping in CSA. It is well known that the effect of crop residues on N 2 O emission depends on a variety of factors such as residue amount and quality (C : N ratio, lignin and cellulose content), soil properties (e.g., texture), placement mode (mulching, incorporation), and soil moisture and temperature regimes (Sanz-Cobena et al, 2014;Li et al, 2016). So far, only a limited number of studies address the effect of legume intercropping on N 2 O emissions and CH 4 uptake in SSA crop production (Baggs et al, 2006;Millar et al, 2004;Dick et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of legume intercropping on N2O emissions and CH4 uptake during maize production in the Great Rift Valley, Ethiopia

Raji

Dörsch

2020

Biogeosciences

View full text Add to dashboard Cite

Abstract. Intercropping with legumes is an important component of climate-smart agriculture (CSA) in sub-Saharan Africa, but little is known about its effect on soil greenhouse gas (GHG) exchange. A field experiment was established at Hawassa in the Ethiopian rift valley, comparing nitrous oxide (N2O) and methane (CH4) fluxes in minerally fertilized maize (64 kg N ha−1) with and without Crotalaria (C. juncea) or lablab (L. purpureus) as intercrops over two growing seasons. To study the effect of intercropping time, intercrops were sown either 3 or 6 weeks after maize. The legumes were harvested at flowering, and half of the aboveground biomass was mulched. In the first season, cumulative N2O emissions were largest in 3-week lablab, with all other treatments being equal to or lower than the fertilized maize mono-crop. After reducing mineral N input to intercropped systems by 50 % in the second season, N2O emissions were comparable with the fully fertilized control. Maize-yield-scaled N2O emissions in the first season increased linearly with aboveground legume N yield (p=0.01), but not in the second season when early rains resulted in less legume biomass because of shading by maize. Growing-season N2O-N emission factors varied from 0.02 % to 0.25 % in 2015 and 0.11 % to 0.20 % in 2016 of the estimated total N input. Growing-season CH4 uptake ranged from 1.0 to 1.5 kg CH4-C ha−1, with no significant differences between treatments or years but setting off the N2O-associated emissions by up to 69 %. Our results suggest that leguminous intercrops may increase N2O emissions when developing large biomass in dry years but, when mulched, can replace part of the fertilizer N in normal years, thus supporting CSA goals while intensifying crop production in the region.

show abstract

Section: Total Non-co 2 Ghg Emissionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of legume intercropping on N2O emissions and CH4 uptake during maize production in the Great Rift Valley, Ethiopia

Raji

Dörsch

2020

Biogeosciences

View full text Add to dashboard Cite

show abstract

“…and 150 days of incubation and this period was enough for decomposition organic matter and mineralization of nutrients. Soil microbial communities regulate principal ecosystem processes such as soil nutrient cycling and organic matter formation and decomposition (Sant'Anna et al, 2018;Trivedi et al, 2017).…”

Section: N P and K + Concentration In Saline-sodic Soilmentioning

confidence: 99%

Efficient Eco-Friendly Organic Wastes Mixed with Growth Promoting Bacteria to Remediate and Increase Fertility of Saline Sodic Soil in Egypt

Hafez

Rashad

El-Ezz

et al. 2019

Preprint

View full text Add to dashboard Cite

Abstract. In Egypt, the total area of agricultural land is 3.36 million acres, which is 3.8 % of the entire territory of the country. One of the main obstacles to agricultural production in Egypt is soil salinization and degradation. Therefore, saline-sodic soil reclamation in arid regions is highly relevant. This study aimed to use Azospirillum inoculation with eco-friendly organic wastes for free remediation of saline-sodic soils. In this work nine treatments included two levels of spent grain (S1 and S2), two levels of compost (C1 and C2), a mix of both sources (C1S1), one level of Azospirillum (A1), a mix of both sources with Azospirillum (A1S1 and A1C1) and an untreated control. The treatments were previously incubated with soil at field capacity for five months under laboratory conditions at 28 °C. The most relevant chemical and biological parameters were analysed every month for five months. Results indicate that Azospirillum inoculation with spent grain increased soil organic carbon (SOC), dehydrogenase and urease enzymes, micro-nutrients (Fe2+, Zn2+, Mn2+, Cu2+ and B+), and macro-nutrients (N, P and K); while decreased exchangeable sodium percentage (ESP), pH and EC, by 75 %, 12 %, and 43 % respectively, compared to initial conditions. The significant variation was observed in chemical and biological properties among all treatments in the order of S2 > A1S1 > A1 > C2 > C1S1 > A1C1 > C1 > control. In conclusion, the addition of Azospirillum with spent grain is highly recommended for amelioration of the saline-sodic soil and is more effective compared with compost to remediate saline-sodic soils.

show abstract

“…Possibly, N released in intercropping treatments was effectively absorbed by the main crop, even though intercropping did not lead to significantly higher maize grain yields in our experiment. Alternatively, changes in physicochemical conditions brought about by intercrops, such as potentially lower soil moisture due to more 360 evapotranspiration, may have counteracted the commonly observed stimulating effect of legume N on N2O emissions(Almaraz et al, 2009, Sant'Anna et al, 2018.…”

mentioning

confidence: 99%

Effect of legume intercropping on N2O emission and CH4 uptake during maize production in the Ethiopian Rift valley

Raji

Dörsch

2019

Preprint

View full text Add to dashboard Cite

Abstract. Intercropping with legumes is an important component of climate smart agriculture (CSA) in sub Saharan Africa, but little is known about its effect on soil greenhouse gas (GHG) exchange. A field experiment was established at Hawassa in the Ethiopian rift valley, comparing nitrous oxide (N2O) and methane (CH4) fluxes in minerally fertilized maize (64&#8201;kg&#8201;N&#8201;ha&#8722;1) with and without crotalaria (C. juncea) or lablab (L. purpureus) as intercrops over two growing seasons. To study the effect of intercropping time, intercrops were sown either three or six weeks after maize. The legumes were harvested at flowering and half of the above-ground biomass was mulched. In the first season, cumulative N2O emissions were largest in 3-week lablab, with all other treatments being equal or lower than the fertilized maize monocrop. After reducing mineral N input to intercropped systems by 50&#8201;% in the second season, N2O emissions were at par with the fully fertilized control. Maize yield-scaled N2O emissions in the first season increased linearly with above-ground legume N-yield (p&#8201;=&#8201;0.01), but not in the second season when early rains resulted in less legume biomass because of shading by maize. Growing season N2O-N emission factors varied from 0.02 to 0.25 and 0.11 to 0.20&#8201;% of the estimated total N input in 2015 and 2016, respectively. Growing season CH4 uptake ranged from 1.0 to 1.5&#8201;kg&#8201;CH4-C&#8201;ha&#8722;1 with no significant differences between treatments or years, but setting off the N2O-associated global warming potential by up to 69&#8201;%. Our results suggest that high yielding leguminous intercrops entail some risk for increased N2O emissions when used together with recommended fertilization rates, but can replace part of the fertilizer N without compromising maize yields in the following year and thus support CSA goals while intensifying crop production in the region.

show abstract

Biological nitrogen fixation and soil N2O emissions from legume residues in an Acrisol in SE Brazil

Cited by 23 publications

References 30 publications

Effect of legume intercropping on N<sub>2</sub>O emissions and CH<sub>4</sub> uptake during maize production in the Great Rift Valley, Ethiopia

Effect of legume intercropping on N<sub>2</sub>O emissions and CH<sub>4</sub> uptake during maize production in the Great Rift Valley, Ethiopia

Efficient Eco-Friendly Organic Wastes Mixed with Growth Promoting Bacteria to Remediate and Increase Fertility of Saline Sodic Soil in Egypt

Effect of legume intercropping on N<sub>2</sub>O emission and CH<sub>4</sub> uptake during maize production in the Ethiopian Rift valley

Contact Info

Product

Resources

About

Biological nitrogen fixation and soil N2O emissions from legume residues in an Acrisol in SE Brazil

Cited by 23 publications

References 30 publications

Effect of legume intercropping on N&lt;sub&gt;2&lt;/sub&gt;O emissions and CH&lt;sub&gt;4&lt;/sub&gt; uptake during maize production in the Great Rift Valley, Ethiopia

Effect of legume intercropping on N&lt;sub&gt;2&lt;/sub&gt;O emissions and CH&lt;sub&gt;4&lt;/sub&gt; uptake during maize production in the Great Rift Valley, Ethiopia

Efficient Eco-Friendly Organic Wastes Mixed with Growth Promoting Bacteria to Remediate and Increase Fertility of Saline Sodic Soil in Egypt

Effect of legume intercropping on N&lt;sub&gt;2&lt;/sub&gt;O emission and CH&lt;sub&gt;4&lt;/sub&gt; uptake during maize production in the Ethiopian Rift valley

Contact Info

Product

Resources

About

Effect of legume intercropping on N<sub>2</sub>O emissions and CH<sub>4</sub> uptake during maize production in the Great Rift Valley, Ethiopia

Effect of legume intercropping on N<sub>2</sub>O emissions and CH<sub>4</sub> uptake during maize production in the Great Rift Valley, Ethiopia

Effect of legume intercropping on N<sub>2</sub>O emission and CH<sub>4</sub> uptake during maize production in the Ethiopian Rift valley