Fertilizer Source and Tillage Effects on Yield‐Scaled Nitrous Oxide Emissions in a Corn Cropping System

Venterea, Rodney T.; Maharjan, Bijesh; Dolan, M. S.

doi:10.2134/jeq2011.0039

Cited by 256 publications

(172 citation statements)

References 48 publications

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“…Other researchers have also reported situations in which N 2 O emissions from soils treated with slow-or controlled-release N fertilizers were similar to those of readily available N sources (Delgado and Mosier, 1996;Halvorson et al, 2014;Hu et al, 2013;Jumadi et al, 2008;Venterea et al, 2011), mainly because of the lack of synchrony of N release and plant use.…”

Section: Discussionmentioning

confidence: 95%

Enhanced-Efficiency Fertilizers in Nitrous Oxide Emissions from Urea Applied to Sugarcane

et al. 2015

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The environmental benefits of producing biofuels from sugarcane have been questioned due to greenhouse gas emissions during the biomass production stage, especially nitrous oxide (N 2 O) associated with nitrogen (N) fertilization. The objective of this work was to evaluate the use of nitrification inhibitors (NIs) dicyandiamide (DCD) and 3,4 dimethylpyrazole phosphate (DMPP) and a controlled-release fertilizer (CRF) to reduce N 2 O emissions from urea, applied at a rate of 120 kg ha -1 of N. Two field experiments in ratoon cycle sugarcane were performed in Brazil. The treatments were (i) no N (control), (ii) urea, (iii) urea+DCD, (iv) urea+DMPP, and (v) CRF. Measurements of N 2 O fluxes were performed using static chambers with four replications. The measurements were conducted three times per week during the first 3 mo and biweekly afterward for a total of 217 and 382 d in the first and second seasons, respectively. The cumulative N 2 O-N emissions in the first ratoon cycle were 1098 g ha -1 in the control treatment and 1924 g ha -1 with urea (0.7% of the total N applied). Addition of NIs to urea reduced N 2 O emissions by more than 90%, which did not differ from those of the plots without N. The CRF treatment showed N 2 O emissions no different from those of urea. The results were similar in the second ratoon: the treatment with urea showed N 2 O emissions of 0.75% of N applied N. Application of NIs resulted in a strong reduction in N 2 O emissions, but CRF increased emissions compared with urea. We therefore conclude that both NIs can be options for mitigation of greenhouse gas emission in sugarcane used for bioenergy.

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Section: Discussionmentioning

confidence: 95%

Enhanced-Efficiency Fertilizers in Nitrous Oxide Emissions from Urea Applied to Sugarcane

et al. 2015

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“…It is useful to express N 2 O emissions in yield-scaled values (i.e., per unit yield) because such values provide additional information for evaluating overall impacts of greenhouse gases (Venterea et al 2011). In this study, yield-scaled N 2 O emissions ranged from 77.1 to 391.8 g N Mg −1 (Table 2), within previously reported ranges (31~2000 g N Mg In this study we tested (for the first time to our knowledge) the potential utility of reducing N 2 O emissions from maize cropping black soil in northeast China by applying manure in autumn and reducing chemical N fertilizer applications in the following year.…”

Section: Discussionmentioning

confidence: 99%

Mitigating nitrous oxide emissions from a maize-cropping black soil in northeast China by a combination of reducing chemical N fertilizer application and applying manure in autumn

Guo

Luo

Chen

et al. 2013

Soil Science and Plant Nutrition

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Nitrous oxide (N 2 O) emissions from agricultural soils, mainly caused by chemical nitrogen (N) fertilizer inputs, are major sources of N 2 O in Chinese terrestrial ecosystems. Thus, attempts to reduce N 2 O emissions from agricultural soils by optimizing N applications are receiving increasing attention. Further, organic fertilizers are being increasingly used in China to improve crop production/quality and prevent or reduce soil degradation. However, organic and chemical fertilizers are often both applied in spring in northeast China, which promotes N 2 O emissions and may be sub-optimal. Therefore, we hypothesized that reducing applications of chemical fertilizer N and applying manure in autumn could be an effective strategy for mitigating but not after manure inputs in autumn or during soil-thawing periods in the following spring. Emission factors for the chemical fertilizer N were on average 1.07% (1.00~1.10%) and 1.14% (0.49~1.83%) in 2010 and 2011, respectively. Furthermore, by comparing the nine pairs of fertilization treatments, the relative increase in cumulative nitrous oxide-nitrogen (N 2 O-N) emissions was found to be proportional to the relative increase in urea application, but independent of the amount of autumn-applied manure. These findings imply that N 2 O emissions from fertilized agricultural soils in northeast China could be mitigated by supplying manure in the autumn and reducing the total amount of chemical N fertilizer applied in the following year. Although no significant difference in maize grain yield was found among the fertilization treatments, the grain yield-scaled N 2 O emissions for the treatments with a lower chemical N application (e.g., N 230 M 15 and N 200 M 15 treatments) were significantly lower than those with a higher chemical N application (e.g., N 320 M 18 and N 280 M 18 treatments). Meanwhile, under the condition of the same application amount of chemical fertilizer N, the grain yield-scaled N 2 O emission decreased with the increase of manure application rate. Thus, the results support the hypothesis that combining reductions in chemical N fertilizer and applying manure in autumn could be an effective strategy for mitigating N 2 O emissions from N-fertilized soils in northeast China.

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“…The mitigation effect of CRF on area-and yield-scaled N 2 O emissions was weaker than NI, and showed a greater 95% CI. A possible reason for this was that the release of nitrogen from CRF was easily affected by environmental factors such as soil moisture and temperature [13,46]. If N released from the CRF did not synchronize with crop N demands, the redundant N in favorable environmental conditions could raise the amount of N 2 O emissions from denitrification [14,18].…”

Section: Mitigation Potential Of Enhanced-efficiency N Fertilizersmentioning

confidence: 99%

“…This was due to the fact that no tillage tended to increase soil moisture and bulk density and maintained the N fertilizers on the soil surface [13], consequently resulting in a significant stimulation in N2O emissions. Wheat and maize yields were lower under no tillage than conventional tillage (Figure 7), which was consistent with a previous report [58].…”

Section: Mitigation Potential Of Soil Tillagementioning

confidence: 99%

“…For example, replacing N fertilizer with manure can mitigate N 2 O emission but could decrease crop yields compared to inorganic N fertilizer application only [10]. Application of enhanced-efficiency N fertilizers can reduce N 2 O emissions but can either increase [11,12] or decrease crop yields [13,14]. Therefore, integrating assessment on both N 2 O emissions and crop yield is essential in optimizing cropping practices.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Evaluation of the Agronomic Impacts on Yield-Scaled N2O Emission from Wheat and Maize Fields in China

Wen-ling

Xin-min

2017

Sustainability

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Contemporary crop production faces dual challenges of increasing crop yield while simultaneously reducing greenhouse gas emission. An integrated evaluation of the mitigation potential of yield-scaled nitrous oxide (N 2 O) emission by adjusting cropping practices can benefit the innovation of climate smart cropping. This study conducted a meta-analysis to assess the impact of cropping systems and soil management practices on area-and yield-scaled N 2 O emissions during wheat and maize growing seasons in China. Results showed that the yield-scaled N 2 O emissions of winter wheat-upland crops rotation and single spring maize systems were respectively 64.6% and 40.2% lower than that of winter wheat-rice and summer maize-upland crops rotation systems. Compared to conventional N fertilizer, application of nitrification inhibitors and controlled-release fertilizers significantly decreased yield-scaled N 2 O emission by 41.7% and 22.0%, respectively. Crop straw returning showed no significant impacts on area-and yield-scaled N 2 O emissions. The effect of manure on yield-scaled N 2 O emission highly depended on its application mode. No tillage significantly increased the yield-scaled N 2 O emission as compared to conventional tillage. The above findings demonstrate that there is great potential to increase wheat and maize yields with lower N 2 O emissions through innovative cropping technique in China.

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Fertilizer Source and Tillage Effects on Yield‐Scaled Nitrous Oxide Emissions in a Corn Cropping System

Cited by 256 publications

References 48 publications

Enhanced-Efficiency Fertilizers in Nitrous Oxide Emissions from Urea Applied to Sugarcane

Enhanced-Efficiency Fertilizers in Nitrous Oxide Emissions from Urea Applied to Sugarcane

Mitigating nitrous oxide emissions from a maize-cropping black soil in northeast China by a combination of reducing chemical N fertilizer application and applying manure in autumn

Evaluation of the Agronomic Impacts on Yield-Scaled N2O Emission from Wheat and Maize Fields in China

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