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 ...

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.

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 ...

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.

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 …

Nitrogen (N) is an important nutrient for crop growth. ... detailed global map of NHNH 4 + and NO 3 − application in synthetic nitrogen fertilizer. ... to model the effects of tillage on N2O ...

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 …

Exponential relationship between N2O emission and fertilizer nitrogen input and mechanisms for improving fertilizer nitrogen efficiency under intensive plastic-shed …

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 …

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.

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 ...

Cimélio Bayer & Jonatas Thiago Piva. 477 Accesses. 2 Citations. Explore all metrics. Abstract. In this study, we assessed the potential of enhanced-efficiency …

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 ...

Enhanced efficiency nitrogen fertilizers (EENFs), including nitrification inhibitors (NIs) and slow-release fertilizer (SRF), are considered promising approaches for mitigating nitrous oxide (N2O ...

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 ...

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 …

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.

In summary, the results suggest that intermittent irrigation would be a better regime to weaken the combined GWP of CH4 and N2O, but N fertilizer contributed positively to the GWP. Physical ...

To gain the effects of N fertilizer applications on N 2 O emissions and local climate change in fertilized rubber ( Hevea brasiliensi s) plantations in the tropics, we …

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 …

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 …

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 ...

Davidson 9 showed that, when manure production and synthetic fertilizer-nitrogen were partitioned as separate sources of N 2 O emissions (with emission factors of 2% and 2.5% respectively), the ...

Nitrogen (N) is a major limiting nutrient to sustain crop yields and quality. As a result, N fertilizer is usually applied in large quantity to increase crop production throughout the world. Application of N …

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.

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.

Four replicates of seven treatments, organic manure (OM), half-organic manure plus half-fertilizer N (1/2 OMN), fertilizer NPK (NPK), fertilizer NP (NP), fertilizer NK (NK), fertilizer PK (PK) and control (CK), were laid out in a randomized block design in September 1989 to monitor the influence of the long-term application of mineral …

One pound of N2O warms the atmosphere about 300 times the amount that one pound of carbon dioxide does over a 100 year timescale. ... When farmers add nitrogen fertilizer to their soil to help ...

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), …

Land use changes from cropland to orchards in Eastern China have raised serious concerns about the regional nitrogen (N) cycle and greenhouse gas balance. We measured soil nitrous oxide (N2O) emissions and methane (CH4) uptake using manual static chambers in an apple orchard. The primary aims were to assess the effect of N …

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 ...

Enhanced efficiency nitrogen fertilizers (EENFs), including nitrification inhibitors (NIs) and slow-release fertilizer (SRF), are considered promising approaches …

Nitrous oxide has 300 times the warming effect compared to C02, A new international study shows N2O increasing in the upper atmosphere, and most of that comes from farm fertilizers.

The N2O emission of 229.5 kg ha-1 N application was as low as that of 189 kg ha-1 N, but the grain yield and agronomic efficiency were significantly higher (11.9%) under 229.5 kg ha-1 treatment than the lower one. ... Grain yields increased significantly due to higher nitrogen fertilizer input, but reach a plateau at 229.5 kg N ha-1, in which ...