A - Papers appearing in refereed journals
Sha, Z., Ma, X., Loick, N., Lv, T., Cardenas, L. M., Ma, Y., Liu, X. and Misselbrook, T. H. 2020. Nitrogen stabilizers mitigate reactive N and greenhouse gas emissions from an arable soil in North China Plain: Field and laboratory investigation. Journal of Cleaner Production. 258, p. 121025.
|Authors||Sha, Z., Ma, X., Loick, N., Lv, T., Cardenas, L. M., Ma, Y., Liu, X. and Misselbrook, T. H.|
Nitrogen (N) stabilizers such as urease inhibitors (UI) and nitrification inhibitors (NI) are promising tools to mitigate N losses from fertilized soils. To better understand the efficacy of UI and NI, a 2-year field trial was carried out in the North China Plain (NCP) to analyze the impact of UI and NI on NH3 loss and N transformations following urea fertilizer application. Additionally, a laboratory study using an automated continuous-flow incubation system was conducted under controlled conditions, using the same soil, to evaluate the mitigation potential of the N stabilizers on NO, N2O and CO2 emission. The results showed that a novel UI product, Limus® (BASF, Germany), containing active ingredients N-(n-butyl) thiophosphoric triamide (NBPT) and N-(n-propyl) thiophosphoric triamide (NPPT), limited ammonium formation rate and reduced NH3 loss in both maize (by 85 and 96% for year 1 and 2, respectively) and wheat (by 41 and 64%, for year 1 and 2, respectively) seasons. The 3, 4-dimethypyrazole phosphate (DMPP) amendment significantly retarded nitrate formation rate but the effectiveness was compromised by high ambient temperature; additionally, the NI amendment increased NH3 emission (by 16 and 24% for maize and wheat year 2, respectively). In the laboratory incubation experiment, addition of the UI reduced emissions of NO, N2O and CO2 by 89, 73 and 19%, respectively, while the addition of the NI reduced the respective emissions by 95, 83 and 24% over the 16 d incubation period. These results suggest that N stabilizers can play a significant role in the mitigation of the environmental impacts of intensive agriculture, and, in particular, that the UI amendment may have the better potential to reduce N losses in the climatic and soil conditions of the NCP, and that the NI should be avoided under high ambient temperatures.
|Keywords||Urease inhibitor; Nitrification inhibitor; NH3 volatilization; NO emission; N2O emission|
|Year of Publication||2020|
|Journal||Journal of Cleaner Production|
|Journal citation||258, p. 121025|
|Digital Object Identifier (DOI)||doi:10.1016/j.jclepro.2020.121025|
|Open access||Published as non-open access|
|Funder||BBSRC Newton funding|
|Biotechnology and Biological Sciences Research Council|
|Funder project or code||UK - China Virtual Joint Centre for Improved Nitrogen Agronomy (CINAG)|
|S2N - Soil to Nutrition - Work package 2 (WP2) - Adaptive management systems for improved efficiency and nutritional quality|
|Publisher||Elsevier Sci Ltd|
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