Activated Biochar-Based Organomineral Fertilizer Delays Nitrogen …
Leaching and nitrous oxide (N2O) emissions can represent substantial nitrogen (N) losses from chemical fertilizers, and slow-release fertilizers (SRFs) can mitigate these effects. Thus, biochar can be an alternative from an agronomic and environmental point of view to synthesize SRFs due to its physicochemical …
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Effects of simulated drought and nitrogen fertilizer on plant
Nitrous oxide (N2O) emissions originated primarily from fertilizer hot spots, and these emissions were massively reduced under drought, with effects lasting throughout most of the growing season. On a growing season basis, N2O emissions were estimated to be 1 to 2 orders of magnitude lower under drought.
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Fertiliser use is fuelling climate-warming nitrous oxide …
The rising use of nitrogen-based fertilisers is driving up global emissions of nitrous oxide, a lesser-known greenhouse gas, complicating efforts to limit climate change, scientists reported in a ...
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Fertilizer use responsible for increase in nitrous oxide in …
Boering was able to trace the source of N2O because bacteria in a nitrogen rich environment, such as a freshly fertilized field, prefer to incorporate nitrogen-14 (14N), the most common isotope ...
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Nitrous oxide (N2O) flux responds exponentially to nitrogen fertilizer
The Yaqui Valley, one of Mexico's major breadbaskets, includes ∼230,000 ha of cultivated, irrigated cropland, with two thirds of the area planted annually to spring wheat (Triticum turgidum).Nitrogen (N) fertilizer applications to wheat have doubled since the 1980s, and currently average around 300 kg N ha −1.Emissions of nitrous oxide (N 2 O), …
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Nonlinear nitrous oxide (N2O) response to nitrogen fertilizer in …
Row-crop agriculture is a major source of nitrous oxide (N 2 O) globally, and results from recent field experiments suggest that significant decreases in N 2 O emissions may be possible by decreasing nitrogen (N) fertilizer inputs without affecting economic return from grain yield. We tested this hypothesis on five commercially farmed fields in …
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Integrated assessment of the impact of enhanced-efficiency nitrogen …
Enhanced efficiency nitrogen fertilizers (EENFs), including nitrification inhibitors (NIs) and slow-release fertilizer (SRF), are considered promising approaches for mitigating nitrous oxide (N2O ...
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Exponential response of nitrous oxide (N2O) emissions to …
High rainfall, irrigation and large fertiliser nitrogen (N) inputs create conditions highly conducive for nitrous oxide (N 2 O) emissions in sugarcane systems. A positive non-linear response of N 2 O emissions to increasing N fertiliser rates has been reported from a range of cropping systems, where N inputs exceed crop requirements. …
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Nitrous oxide emissions from enhanced-efficiency nitrogen fertilizers
In this study, we assessed the potential of enhanced-efficiency nitrogen (EEN) fertilizers for mitigating nitrous oxide (N2O) emissions and compared it with that of common urea. N2O-N emission factor (EF-N2O, % applied N emitted as N2O-N) and yield-scaled N2O-N emissions (N2O-N emitted per yield unit) for wheat, bean and black oat …
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Effect of fertilizer nitrogen management on N2O emissions …
This study examined the effect of rate and time of fertilizer N application to corn on N2O emissions in 2 yr on commercial corn fields. All treatments received starter fertilizer at 45 and 59 kg N ha-1 in 2004 and 2005, respectively, similar to grower practice. Treatments included a control, with no additional fertilizer N application, 75 or 150 kg N ha-1 banded …
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MANAGEMENT OF NITROGEN FERTILIZER TO REDUCE …
Adding N fertilizer in the fall or spreading manure on frozen fields often leads to especially large nitrate19 and N 2 O20 losses. In such cases, fertilizer applications are way out of sync with the timing of crop needs. Improving nitrogen fertilizer placement Placing N fertilizer close to plant roots also can reduce N 2 O emissions.
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Effects of Subsurface Drip Irrigation and Nitrogen Fertilizer …
Under global warming, it is important to reduce the emissions of green house gas nitrous oxide (N2O) while improving forage yield and quality through nitrogen (N) reduction in the development of a sustainable agriculture. How to reduce N2O emissions through appropriate water and nitrogen management in alfalfa planting is still unclear.
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A comprehensive quantification of global nitrous …
Nitrous oxide (N 2 O), like carbon dioxide, is a long-lived greenhouse gas that accumulates in the atmosphere. Over the past 150 …
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Acceleration of global N2O emissions seen from two …
Nitrous oxide (N 2 O) is the third most important long-lived GHG and an important stratospheric ozone depleting substance. …
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Insights into CO2 and N2O emissions driven by applying …
The fertilizer concentration was set at 150 mg N/kg, which corresponds to the average nitrogen fertilizer application rate in China (Cui et al., 2010), with a value of 261 kg N/ha. After uniformly mixing 200 g of soil with water, biochar, and nitrogen fertilizer according to the specified ratios, slowly sprinkle the mixture into the soil column.
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Effects of Nitrogen Fertilizer Management on CH4 and N2O …
The results showed that:① compared with those of CK, the fertilizer treatments reduced CH4 emissions by 14.6%-25.1% and increased N2O emissions by 610%-1836% in both years; ② compared with ...
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Effects of different nitrogen fertilizer management practices …
After reducing the amount of nitrogen fertilizer in the wheat-corn rotation system, the results showed that the cumulative emission of soil N2O from the RN40% + HOM [40% of RN (recommended ...
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Nitrous oxide emissions from enhanced-efficiency …
Cimélio Bayer & Jonatas Thiago Piva. 477 Accesses. 2 Citations. Explore all metrics. Abstract. In this study, we assessed the potential of enhanced-efficiency …
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VM0022 Quantifying N2O Emissions Reductions in …
Errata and Clarifications Erratum to VM0022 Quantifying N2O Emissions Reductions in Agricultural Crops through Nitrogen Fertilizer Rate Reduction, v1.1 This methodology quantifies reductions of nitrous oxide from cropping systems. The methodology applies to projects in the United States that optimize nitrogen fertilizer through the use of …
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Global metaanalysis of the nonlinear response of soil …
Nitrogen (N) fertilizer rate is the best single predictor of N 2 O emissions from agricultural soils, which are responsible for ∼50% of the total global anthropogenic flux, but it is a relatively imprecise estimator.
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Nitrogen fertiliser use could 'threaten global climate goals'
The world's use of nitrogen fertilisers for food production could threaten efforts to keep global warming below 2C above pre-industrial levels. That is according to the Global Carbon Project 's first comprehensive assessment of how nitrous oxide (N2O) emissions are contributing to climate change. Published in Nature, the results show that ...
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Nitrogen Fertilizer Management Practices to Reduce …
Nitrogen fertilizer practices affect nitrous oxide (N 2 O) emissions from agricultural soils. The "4R" nutrient stewardship framework of using N fertilizer at the right …
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Effect of Enhanced Efficiency Fertilizers on Nitrous …
NIs, DIs, and CRFs reduced N2O emissions by 38, 30, and 19%, respectively, compared with conventional N fertilizers. ... Controlled-Release Nitrogen Fertilizers. Controlled-release N fertilizers include …
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The world's forgotten greenhouse gas
Carefully dispensing fertiliser right when plants need it or finding ways to maintain yields with reduced nitrogen fertiliser would reduce these N2O emissions. Scientists are looking at various ...
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Response of soil N2O emission and nitrogen utilization to organic
After reducing the amount of nitrogen fertilizer in the wheat-corn rotation system, the results showed that the cumulative emission of soil N2O from the RN40% + HOM [40% of RN (recommended ...
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Denitrification Losses and N2O Emissions from Nitrogen Fertilizer
Denitrification, N2O and CO2 fluxes in rice-wheat cropping system as affected by crop residues, fertilizer N and legume green manure. Biol. Fertil. Soils. 34: 375-389. Bertelsen, F. and Jensen, E. S. 1992. Gaseous nitrogen losses from field plots grown with pea or spring barley estimated by 15N mass balance and acetylene inhibition techniques.
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Management of Nitrogen Fertilizer to Reduce …
Nitrogen availability — the amount of inorganic N in soil at any given time — is the single best predictor of N2O fluxes in cropped ecosystems. Michigan State University researchers have shown that N2O emissions are especially high when N fertilizer is applied at rates greater than crop … See more
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Higher yield with less nitrogen fertilizer | Nature Plants
Nitrogen (N) is a major limiting nutrient for plant growth and development, especially for crops in the agroecosystems. To increase crop yield, N fertilizer is applied, often at rates far greater ...
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Reducing N2O emissions with enhanced efficiency nitrogen fertilizers
Enhanced efficiency nitrogen fertilizers (EENFs), including nitrification inhibitors (NIs) and slow-release fertilizer (SRF), are considered promising approaches for mitigating nitrous oxide (N2O ...
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Greenhouse gas emissions from global production and use of nitrogen …
The global agri-food system relies on synthetic nitrogen (N) fertilisation to increase crop yields, yet the use of synthetic N fertiliser is unsustainable. ... level dataset available on N2O soil ...
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