Agriculture's share in the emission of trace gases affecting the climate and some cause-oriented proposals for sufficiently reducing this share

Isermann, K.

doi:10.1016/0269-7491(94)90027-2

Cited by 129 publications

(50 citation statements)

References 30 publications

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“…The peaks of N 2 O fluxes in the treatment of urea fertilization showed that the application of nitrogenous fertilizer clearly increased N 2 O emission from agricultural soils. This is entirely consistent with results from previously reported field studies (Iserman, 1994;Harrison et al, 1995). However, the peaks of N 2 O fluxes in the treatments of applying urea plus REE fertilizers were much higher than those from the urea only application, especially for the 10-fold REE fertilizers treatment.…”

Section: Resultssupporting

confidence: 92%

“…During the 1990s, the concentration of N 2 O was about 311 ppbv in the atmosphere (Bouwman, 1990;Battle et al, 1996). Agricultural soils are significant sources of N 2 O (Iserman, 1994;Harrison et al, 1995). The emission of N 2 O from the application of nitrogen fertilizer to agricultural soils is currently estimated to be 2-3 Tg yr À1 N 2 O-N (1 Tg ¼ 10 12 g), which accounts for about 21-46% of total emission from global anthropogenic sources (FAO and IAEA, 1992).…”

Section: Introductionmentioning

confidence: 99%

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Effects of rare-earth fertilizers on the emission of nitrous oxide from agricultural soils in China

Wang

Zhang

2008

Atmospheric Environment

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Rare-earth fertilizers have long been used in agriculture in China. The consequences of these applications are of more recent concern. In our study, an experiment was carried out to identify the effects of applying rare-earth fertilizers on emission of nitrous oxide from paddy and dryland soils in northern China. Normal dosage of rare-earth fertilizers only, normal dosage of urea only, normal dosage of urea plus rare-earth fertilizers, and a normal urea application plus a 10-fold increase in the dosage of rare-earth fertilizers were applied to the soils in pots, prepared for our experiment. A static closedchamber technique was used to measure nitrous oxide emission flux from the soil in the pots before and after fertilization during the experiment. The results show that the application of only rare-earth fertilizers did not have any visible effect on the emission of nitrous oxide from both paddy and dryland soils. Applying a normal dosage rare-earth fertilizers plus urea led to greater emission of nitrous oxide from the soils than only applying the normal dosage of urea. When a 10-fold increase of rare-earth fertilizers dosage was added to a normal dosage of urea, the emission of nitrous oxide from the soils increased even further. We speculate that the application of rare-earth fertilizers leads to an increase of available NH 4 + -N from urea hydrolysis and activate bacteria and enzymes in nitrification and de-nitrification. r

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Section: Resultssupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Effects of rare-earth fertilizers on the emission of nitrous oxide from agricultural soils in China

Wang

Zhang

2008

Atmospheric Environment

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“…Other studies show that excessive nutrient loading from agricultural watersheds can have a significant impact on receiving water bodies (Edmonson 1972;Peterjohn & Correll 1984;US EPA 1989;Tu et al 1990;Tondersld 1996). In addition, N emissions to the atmosphere as N20, NH3 and NO can have physical and chemical impact on the atmosphere (e.g., greenhouse effect) (Wayne 1991;Ismermann 1994) China is the largest producer of nitrogen fertilizers and the largest consumer of mineral fertilizers in the world, but there is little data concerning the pollution problems caused by fertilizers. For this purpose, we selected the Liuchahe watershed of Chaohu Lake in southeastern China for our 1994-95 study of nutrient cycling.…”

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confidence: 99%

Nutrient budgets and biogeochemistry in an experimental agricultural watershed in Southeastern China

1999

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Abstract. During a two-year field study, an annual nutrient budget and cycles were developed for a small agricultural watershed. The study emphasized the integrated unit of the watershed in understanding the biogeochemistry. It was found that the total nutrient input was 39.1 x 104 kg nitrogen and 3.91 x 104 kg phosphorus in the year 1995, of which the greatest input of nutrients to the watershed was chemical fertilizer application, reaching 34.7 x 104 kg (676 kg/ha) nitrogen and 3.88 x 104 kg (76 kg/ha) phosphorus. The total nutrient output from the watershed was 13.55 x 104 kg nitrogen and 0.40 x 104 kg phosphorus, while the largest output of nitrogen was denitrification, accounting for 44.1% of N output; the largest output of phosphorus was sale of crops, accounting for 99.4% of P output. The results show that the nutrient input is larger than output, demonstrating that there is nutrient surplus within the watershed, a surplus which may become a potential source of nonpoint pollution to area waters. The research showed that both denitrification and volatilization of nitrogen are key ways of nitrogen loss from the watershed. This suggests that careful management of fertilizer application will be important for the sustainable development of agriculture.The research demonstrated that a multipond system within the watershed had high retention rate for both water and nutrients, benefiting the water, nutrient and sediment recycling in the terrestrial ecosystem and helping to reduce agricultural nonpoint pollution at its source. Therefore, this unique watershed system should be recommended due to its great potential relevance for sustainable agricultural development.

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“…Iserman(1994) (Firestone and Davidson, 1989). 그리고 그 다음 감축 효과로는 토양수분을 조절하여 N 2 O 배출을 줄일 수 있으며, 대기온도에 따른 토양온도 변화에도 N 2 O 배출에 영향을 받는다고 하였다 (Frolking et al, 1998;Parton et al, 1996).…”

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A Revised Estimate of N<sub>2</sub>O Emission Factor for Spring Chinese cabbage fields in Korea

Kim¹,

Park²,

Jeong³

et al. 2015

Korean Journal of Agricultural and Forest Meteorology

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Greenhouse-gas emission factors are widely used to estimate emissions arising from a defined unit of a specific activity. Such estimates are used both for international reporting to the United Nations Framework Convention on Climate Change (UNFCCC) and for a myriad of national and subnational reporting purposes. The Intergovernmental Panel on Climate Change (IPCC) provides a methodology for national and sub-national estimation of known greenhouse gas emissions including N 2 O for each sector from which the emissions arise. The objective of this study was to develop an emission factor to estimate the direct N 2 O emission from an agricultural field cultivated with Chinese cabbage during spring season in 2010-2012. An estimated emission factor of N 2 O calculated over three years from field experiment accounting for cumulative N 2 O emission, nitrogen fertilization rate, and background N 2 O emission was 0.0056±0.00254 (95% CI) Kg N 2 O-N/kg N. More extensive studies are needed to develop N 2 O emission factors for other upland crops in various regions of Korea because N 2 O emission is influenced by many factors including climate characteristics, soil properties agricultural practices and crop species.

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Agriculture's share in the emission of trace gases affecting the climate and some cause-oriented proposals for sufficiently reducing this share

Cited by 129 publications

References 30 publications

Effects of rare-earth fertilizers on the emission of nitrous oxide from agricultural soils in China

Effects of rare-earth fertilizers on the emission of nitrous oxide from agricultural soils in China

Nutrient budgets and biogeochemistry in an experimental agricultural watershed in Southeastern China

A Revised Estimate of N<sub>2</sub>O Emission Factor for Spring Chinese cabbage fields in Korea

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