Kamal Adhikari

Doctor of Philosophy, (Soil Science)
Study Completed: 2019
College of Sciences


Thesis Title
Mitigation potential of urease inhibitory compounds in reducing ammonia emissions from cattle urine in dairy-grazed pasture soils

Read article at Massey Research Online: MRO icon

The urine deposited by dairy cattle during grazing is the major source of ammonia emissions in
New Zealand agriculture. These emissions have negative impacts on the environment and represent agronomic and economic losses to livestock farmers. Mr Adhikari evaluated the mitigation potential of organic and inorganic urease inhibitory compounds to reduce the ammonia emissions from cattle urine. He found that a recently introduced organic compound N-(2-Nitrophenyl) phosphoric triamide (2-NPT) has greater longevity of effectiveness than commonly used N-(n-butyl) thiophosphoric triamide (nBTPT) to mitigate ammonia emissions from cattle urine. His research suggests that to reduce ammonia emissions in dairy-grazed pastures, 2-NPT could be a better mitigation option than nBTPT.

Professor Surinder Saggar
Dr Danilo Guinto
Dr James Hanly

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