Methanotroph abundance not affected by applications of animal urine and a nitrification inhibitor,dicyandiamide, in six grazed grassland soils |
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| Authors: | Hong Jie Di Keith C. Cameron Ju-Pei Shen Chris S. Winefield Maureen O’Callaghan Saman Bowatte Ji-Zheng He |
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| Affiliation: | (1) Centre for Soil and Environmental Research, Lincoln University, P.O. Box 84, Lincoln, 7647 Christchurch, New Zealand;(2) State Key Laboratory of Urban and Regional Ecology, Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Beijing, 100085, People’s Republic of China;(3) Faculty of Agriculture and Life Sciences, Lincoln University, P.O. Box 84, Lincoln, 7647 Christchurch, New Zealand;(4) Lincoln Research Centre, AgResearch, Private Bag 4749, Christchurch, 8140, New Zealand;(5) Grasslands Research Centre, AgResearch Ltd, Tennent Drive, Private Bag 11008, Palmerston North, 4442, New Zealand |
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| Abstract: | Purpose Methanotrophs are an important group of methane (CH4)-oxidizing bacteria in the soil, which act as a major sink for the greenhouse gas, CH4. In grazed grassland, one of the ecologically most sensitive areas is the animal urine patch soil, which is a major source of both nitrate (NO3 −) leaching and nitrous oxide (N2O) emissions. Nitrification inhibitors, such as dicyandiamide (DCD), have been used to mitigate NO3 − leaching and N2O emissions in grazed pastures. However, it is not clear if the high nitrogen loading rate in the animal urine patch soil and the use of nitrification inhibitors would have an impact on the abundance of methanotrophs in grazed grassland soils. The purpose of this study was to determine the effect of animal urine and DCD on methanotroph abundance in grazed grassland soils. |
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