Please use this identifier to cite or link to this item:
Title: A glasshouse study on the interaction of low mineral ash biochar with nitrogen in a sandy soil
Contributor(s): Van Zwieten, Lukas  (author); Kimber, S (author); Downie, A (author); Morris, S (author); Petty, S (author); Rust, J (author); Chan, K Y (author)
Publication Date: 2010
DOI: 10.1071/SR10003
Handle Link:
Abstract: The effect of a low mineral ash biochar on biomass production and nitrogen (N) uptake into plants was tested with wheat and radish in a Yellow Earth used for commercial vegetable production. The biochar had an acid neutralising capacity <0.5% CaCO₃, a total C content of 75%, and a molar H/C ratio of 0.45, indicating stability due to its aromaticity. A pot trial was established under climate-controlled conditions. Five rates of N fertiliser (0, 17, 44, 88, 177 kg N/ha) were applied as urea in combination with 5 biochar rates (0, 1.1, 2.2, 4.4, 11% w/w). Analysis of biomass production revealed a significant biochar × N fertiliser interaction. In particular, increasing biochar concentrations improved biomass production in both crop species at lower N application rates. The highest biochar application rate resulted in significantly greater accumulation of NO₃⁻-N in the soil and lower NH₄ ⁺-N averaged across the 5 N application rates. The biochar also decreased available P, and significantly increased microbial activity measured using the fluorescein diacetate method. Increasing N fertiliser application resulted in greater accumulation of NO₃⁻-N with no changes to NH₄ ⁺-N averaged across the 5 biochar application rates. Nitrogen fertiliser application did not influence microbial activity or biomass C. The trial suggests that in some cropping systems, biochar application will enable reduced N fertiliser input while maintaining productivity.
Publication Type: Journal Article
Source of Publication: Australian Journal of Soil Research, 48(7), p. 569-576
Publisher: CSIRO Publishing
Place of Publication: Australia
ISSN: 1838-675X
Field of Research (FOR): 050304 Soil Chemistry (excl Carbon Sequestration Science)
050301 Carbon Sequestration Science
Socio-Economic Outcome Codes: 961402 Farmland, Arable Cropland and Permanent Cropland Soils
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
Statistics to Oct 2018: Visitors: 220
Views: 224
Downloads: 0
Appears in Collections:Journal Article

Files in This Item:
2 files
File Description SizeFormat 
Show full item record


checked on Nov 26, 2018

Page view(s)

checked on May 2, 2019
Google Media

Google ScholarTM



Items in Research UNE are protected by copyright, with all rights reserved, unless otherwise indicated.