scholarly journals A 3-year field measurement of methane and nitrous oxide emissions from rice paddies in China: Effects of water regime, crop residue, and fertilizer application

2005 ◽  
Vol 19 (2) ◽  
pp. n/a-n/a ◽  
Author(s):  
Jianwen Zou ◽  
Yao Huang ◽  
Jingyan Jiang ◽  
Xunhua Zheng ◽  
Ronald L. Sass
Keyword(s):  
Nitrous Oxide ◽  
Field Measurement ◽  
Water Regime ◽  
Crop Residue ◽  
Fertilizer Application ◽  
Nitrous Oxide Emissions ◽  
Rice Paddies

Interactive effects of soil texture and salinity on nitrous oxide emissions following crop residue amendment

Geoderma ◽  
2019 ◽  
Vol 337 ◽  
pp. 1146-1154 ◽  
Author(s):  
Yongxiang Yu ◽  
Chengyi Zhao ◽  
Ningguo Zheng ◽  
Hongtao Jia ◽  
Huaiying Yao
Keyword(s):  
Nitrous Oxide ◽  
Soil Texture ◽  
Crop Residue ◽  
Interactive Effects ◽  
Nitrous Oxide Emissions

scholarly journals Quantifying N2O emissions from intensive grassland production: the role of synthetic fertilizer type, application rate, timing and nitrification inhibitors

2016 ◽  
Vol 154 (5) ◽  
pp. 812-827 ◽  
Author(s):  
M. J. BELL ◽  
J. M. CLOY ◽  
C. F. E. TOPP ◽  
B. C. BALL ◽  
A. BAGNALL ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Fertilizer Application ◽  
Application Rate ◽  
Nitrous Oxide Emissions ◽  
Mineral Fertilizers ◽  
Urea Fertilizer ◽  
Mitigation Options ◽  
Application Rates ◽  
The Impact ◽  
Ipcc Default

SUMMARYIncreasing recognition of the extent to which nitrous oxide (N2O) contributes to climate change has resulted in greater demand to improve quantification of N2O emissions, identify emission sources and suggest mitigation options. Agriculture is by far the largest source and grasslands, occupying c. 0·22 of European agricultural land, are a major land-use within this sector. The application of mineral fertilizers to optimize pasture yields is a major source of N2O and with increasing pressure to increase agricultural productivity, options to quantify and reduce emissions whilst maintaining sufficient grassland for a given intensity of production are required. Identification of the source and extent of emissions will help to improve reporting in national inventories, with the most common approach using the IPCC emission factor (EF) default, where 0·01 of added nitrogen fertilizer is assumed to be emitted directly as N2O. The current experiment aimed to establish the suitability of applying this EF to fertilized Scottish grasslands and to identify variation in the EF depending on the application rate of ammonium nitrate (AN). Mitigation options to reduce N2O emissions were also investigated, including the use of urea fertilizer in place of AN, addition of a nitrification inhibitor dicyandiamide (DCD) and application of AN in smaller, more frequent doses. Nitrous oxide emissions were measured from a cut grassland in south-west Scotland from March 2011 to March 2012. Grass yield was also measured to establish the impact of mitigation options on grass production, along with soil and environmental variables to improve understanding of the controls on N2O emissions. A monotonic increase in annual cumulative N2O emissions was observed with increasing AN application rate. Emission factors ranging from 1·06–1·34% were measured for AN application rates between 80 and 320 kg N/ha, with a mean of 1·19%. A lack of any significant difference between these EFs indicates that use of a uniform EF is suitable over these application rates. The mean EF of 1·19% exceeds the IPCC default 1%, suggesting that use of the default value may underestimate emissions of AN-fertilizer-induced N2O loss from Scottish grasslands. The increase in emissions beyond an application rate of 320 kg N/ha produced an EF of 1·74%, significantly different to that from lower application rates and much greater than the 1% default. An EF of 0·89% for urea fertilizer and 0·59% for urea with DCD suggests that N2O quantification using the IPCC default EF will overestimate emissions for grasslands where these fertilizers are applied. Large rainfall shortly after fertilizer application appears to be the main trigger for N2O emissions, thus applicability of the 1% EF could vary and depend on the weather conditions at the time of fertilizer application.

Methane and Nitrous Oxide Emissions Reduced Following Conversion of Rice Paddies to Inland Crab–Fish Aquaculture in Southeast China

2015 ◽  
Vol 50 (2) ◽  
pp. 633-642 ◽  
Author(s):  
Shuwei Liu ◽  
Zhiqiang Hu ◽  
Shuang Wu ◽  
Shuqing Li ◽  
Zhaofu Li ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Nitrous Oxide Emissions ◽  
Rice Paddies ◽  
Southeast China

Modeling the Effects of Fertilizer Application Rate on Nitrous Oxide Emissions

2006 ◽  
Vol 70 (1) ◽  
pp. 235-248 ◽  
Author(s):  
R. F. Grant ◽  
E. Pattey ◽  
T. W. Goddard ◽  
L. M. Kryzanowski ◽  
H. Puurveen
Keyword(s):  
Nitrous Oxide ◽  
Fertilizer Application ◽  
Application Rate ◽  
Nitrous Oxide Emissions ◽  
Fertilizer Application Rate

Soil nitrous oxide emissions following crop residue addition: a meta-analysis

2013 ◽  
Vol 19 (10) ◽  
pp. 2956-2964 ◽  
Author(s):  
Huaihai Chen ◽  
Xuechao Li ◽  
Feng Hu ◽  
Wei Shi
Keyword(s):  
Nitrous Oxide ◽  
Crop Residue ◽  
Meta Analysis ◽  
Nitrous Oxide Emissions

Methane and nitrous oxide emissions from direct-seeded and seedling-transplanted rice paddies in southeast China

2013 ◽  
Vol 374 (1-2) ◽  
pp. 285-297 ◽  
Author(s):  
Shuwei Liu ◽  
Yaojun Zhang ◽  
Feng Lin ◽  
Ling Zhang ◽  
Jianwen Zou
Keyword(s):  
Nitrous Oxide ◽  
Nitrous Oxide Emissions ◽  
Rice Paddies ◽  
Southeast China ◽  
Transplanted Rice ◽  
Direct Seeded
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