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. …
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 ...
Exponential relationship between N2O emission and …
Exponential relationship between N2O emission and fertilizer nitrogen input and mechanisms for improving fertilizer nitrogen efficiency under intensive plastic-shed …
Effects of N Fertilizer Application on Soil N2O Emissions …
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 …
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
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. …
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 …
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 …
Nitrogen fertilizer management for nitrous oxide (N2O) …
Nitrous oxide (N2O) is a major greenhouse gas (GHG) product of intensive agriculture. Fertilizer nitrogen (N) rate is the best single predictor of N2O emissions in row-crop agriculture in the US Midwest. We use this relationship to propose a transparent, scientifically robust protocol that can be utilized by developers of agricultural offset …
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), …
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.
Nitrogen fertilizer, N2O, farming, and a 'worst case' …
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.
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.
The effects of nitrogen fertilizer application on
The influences of application times, cropping systems and measurement frequency should all be considered when assessing CH4 and N2O emissions/uptake induced by N fertilizer. Keywords: nitrogen fertilizer, methane, nitrous oxide, global warming potential, emission factor estimated to account for most of the global …
How does straw returning combined with nitrogen fertilizer drive N2O
Straw returning not only improves carbon (C) and nitrogen (N) pools but also increases soil nitrous oxide (N 2 O) emissions, which poses a threat to the sustainable development of agriculture. To investigate the effect of straw return combined with nitrogen fertilizer on labile C and N pools in the soil and short-term response to soil N 2 O …
Balancing high yields and low N2O emissions from …
Background and aims Greenhouse vegetable production is commonly associated with substantial nitrous oxide (N2O) emissions, low nitrogen (N)and irrigation water use efficiency (NUE and IWUE) due to excess N input and frequent flooding irrigation, so it is crucial to develop irrigation and fertilization strategies to alleviate N2O emissions …
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 ...
Global agriculture and nitrous oxide emissions
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 ...
IJERPH | Free Full-Text | Agriculture-Induced N2O Emissions …
The difference in N2O emissions by province was significant, the concentration trend was more prominent, and the differences of N2O emissions between provinces and regions were diverse. ... Thus, it is the third largest greenhouse gases after CO 2 and methane, and with increased global population and nitrogen fertilizer use, N …
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 ...
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 …
(PDF) Effects of Irrigation Regime and Nitrogen Fertilizer …
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 ...
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 ...
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 ...
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 ...
Global crop-specific nitrogen fertilization dataset in …
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 ...
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 …
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 ...
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 ...
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.
