The Effectiveness of Lignite Coal and Biochar in Reducing Nitrogen (N) Losses from Cattle Feedlot Manure

This study was conducted at the University of Melbourne Burnley campus aimed at investigating the effectiveness of lignite coal and biochar in reducing nitrogen losses from feedlot cattle manure. Forty (40) kg of manure was mixed with either 6kg of biochar or lignite and the other 40kg of manure were used as control. These were put in 220 drum replicated 3 times where 50g of N in form of urea were sprayed in them. The concentration of urea, NH4 + and NO3 -, and emissions of N2O and NH3 were monitored for 21 days in each drum to assess nitrogen loss. At the end of the experiment (3 weeks), biochar and lignite reduced ammonia loss by 38% and 72% respectively as compared to the control. However biochar increased N2O flux 10 fold as compared to that of the control.
Cette étude a été menée sur le campus de Burnley à l’Université de Melbourne. Elle a visé à étudier l’efficacité de la lignite et du biochar dans la réduction des pertes d’azote provenant du fumier de bovins des abattoirs. Quarante (40) kg de fumier ont été mélangés avec soit 6 kg de biochar ou de lignite et les 40 autres kg de fumier ont été utilisés comme témoin. Ceux-ci ont été mis dans un tambour de 220 répliqué 3 fois où 50g d’ N sous forme d’urée ont été pulvérisés sur eux. La concentration de l’urée, NH4+ et NO3-, et les émissions de N2O et NH3 ont été suivis pendant 21 jours dans chaque tambour pour évaluer la perte d’azote. A la fin de l’expérience (3 semaines), le biochar et la lignite ont réduit la perte d’ammoniac de 38% et 72% respectivement par rapport au témoin. Cependant le biochar a augmenté 10 fois le flux de N2O par rapport à celui du témoin.
Extended abstracts submitted under Enhancing Natural Resource Management
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East Africa
RUFORUM Conferences and Workshops
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The 2012 RUFORUM Biennial Conference is the third in the series. The main objective of the Biennial conferences is to provide a platform for agricultural research for development stakeholders in Africa and beyond to actively exchange findings and experiences, while at the same time learning lessons towards improving performance of the agricultural sector and ultimately people’s livelihoods. The biennial conference is RUFORUM’s most comprehensive meeting for the diversity of stakeholers in agriculture. It is especially dedicated to graduate students and their supervisors, grantees in RUFORUM member universities and alumni. It is a platform for peer review, quality control, mentorship, networking and shared learning. The third Biennial Conference was attended by 657 participants.This record contains an extended abstract accepted under Enhancing Natural Resource Management