Methanotroph abundance not affected by applications of animal urine and a nitrification inhibitor, dicyandiamide, in six grazed grassland soils
Hong Jie Di, Keith C Cameron, Ju-Pei Shen, Chris S Winefield, Maureen O'Callaghan, Saman Bowatte, Ji-Zheng He
Journal of Soils and Sediments | SPRINGER HEIDELBERG | Published : 2011
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 ..View full abstract
We would like to thank the New Zealand Foundation for Research, Science and Technology (FRST) for the funding; Drs. Ross Monaghan, Stewart Ledgard, and Mark Sheppard of AgResearch and Drs. Bruce Thorrold and Deanne Waugh of Dairy NZ for their assistance with soil sampling and Emily Gerard and Shona Brock of AgResearch and Jie Lei, Steve Moore, Carole Barlow, Trevor Hendry, and Neil Smith of Lincoln University for their technical support.