Individual study: How does the application of different nitrification inhibitors affect nitrous oxide emissions and nitrate leaching from cow urine in grazed pastures?
Di H.J. & Cameron K.C. (2012) How does the application of different nitrification inhibitors affect nitrous oxide emissions and nitrate leaching from cow urine in grazed pastures? Soil Use and Management, 28, 54-61
This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.
Amend the soil with formulated chemical compounds
A replicated, controlled study in 2008 on sandy loam in New Zealand (Di & Cameron 2012), found that two nitrification inhibitors, dicyandiamide and 3,4-dimethylpyrazole phosphate (DMPP), were both effective at reducing nitrogen loss through nitrous oxide emissions and nitrate leaching. Adding dicyandiamide to pasture reduced nitrous oxide emissions by 62% and nitrate loss by 36%, while adding DMPP to pasture reduced nitrous oxide emissions by 66% and nitrate loss by 28%, compared to the control. The study used three treatments, replicated four times on pasture plots planted with a mixture of ryegrass Lolium perenne and white clover Trifolium repens. Treatments were control (cow urine, 1000 kg/ha), dicyandiamide (cow urine and dicyandiamide at 10 kg/ha) and DMPP (cow urine and DMPP at 1 kg/ha or 5 kg/ha). Treatments were applied in mid-winter and re-applied in early spring. Dicyandiamide and DMPP were both applied as liquid formulations.