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Type: Journal article
Title: A slow release brown coal-urea fertiliser reduced gaseous N loss from soil and increased silver beet yield and N uptake
Author: Saha, B.
Rose, M.
Wong, V.
Cavagnaro, T.
Patti, A.
Citation: Science of the Total Environment, 2019; 649:793-800
Publisher: Elsevier
Issue Date: 2019
ISSN: 0048-9697
Statement of
Biplob K.Saha, Michael T.Rose, Vanessa N.L.Wong, Timothy R.Cavagnaro, Antonio F.Patti
Abstract: Increasing crop yield and fertiliser nitrogen (N)-use efficiency is important for productive agricultural systems with a reduced environmental footprint. The aim of this study was to assess the effect of slow release brown coal-urea (BCU) fertiliser on the gaseous N losses, biomass yield and N uptake by silver beet (Beta vulgaris L.) compared to commercial urea. Two soils were amended with urea, BCU 1 (22% N) or BCU 2 (17% N) as N-fertiliser at the rate of 50 or 100 kg N ha-1. Five gas sampling periods were undertaken to measure the loss of N as N2O and NH3. After 10 weeks, biomass, N concentration, and N uptake of silver beet, and mineral and mineralisable N of post-harvest soil were measured. BCU substantially increased fertiliser N availability and uptake by silver beet, reduced N2O emission by 29% and NH3 emission by 36% compared to urea alone, irrespective of soil type. Compared to urea, BCU blends increased biomass yield by 27% and 23% in a Tenosol and Dermosol soil, respectively. In addition, application of BCU fertiliser substantially enhanced the potentially mineralisable N and organic carbon content of soil. These results provide evidence that granulation of urea with brown coal (BC) can increase silver beet N-use efficiency and yield in different soil types, and more work is now required to validate this technology for other crops.
Keywords: Brown coal; urea; slow release fertiliser; biomass yield; fertiliser N use efficiency; humic acid
Rights: © 2018 Published by Elsevier B.V.
RMID: 0030097146
DOI: 10.1016/j.scitotenv.2018.08.145
Appears in Collections:Agriculture, Food and Wine publications

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