dc.contributor.author | Asadyar, L | |
dc.contributor.author | Xu, CY | |
dc.contributor.author | Wallace, HM | |
dc.contributor.author | Xu, Z | |
dc.contributor.author | Reverchon, F | |
dc.contributor.author | Bai, SH | |
dc.date.accessioned | 2020-10-16T03:05:16Z | |
dc.date.available | 2020-10-16T03:05:16Z | |
dc.date.issued | 2020 | |
dc.identifier.issn | 0944-1344 | |
dc.identifier.doi | 10.1007/s11356-020-11016-3 | |
dc.identifier.uri | http://hdl.handle.net/10072/398426 | |
dc.description.abstract | Biochar has strong potential to improve nitrogen (N) use efficiency in both agricultural and horticultural systems. Biochar is usually co-applied with full rates of fertiliser. However, the extent to which N cycling can be affected after biochar application to meet plant N requirement remains uncertain. This study aimed to explore N cycling up to 2 years after biochar application. We applied pine woodchip biochar at 0, 10 and 30 t ha−1 (B0, B10, B30, respectively) in a macadamia orchard and evaluated the N isotope composition (δ15N) of soil, microbial biomass and macadamia leaves. Soil total N (TN) and inorganic N pools were also measured up to 2 years after biochar application. Biochar did not alter soil TN but soil NO3−-N increased at months 12 and 24 after biochar application. Soil NO3−-N concentrations were always over ideal levels of 15 μg g−1 in B30 throughout the study. Stepwise regression indicated that foliar δ15N decreases after biochar application were explained by increased NO3−-N concentrations in B30. Foliar TN and photosynthesis were not affected by biochar application. The soil in the high rate biochar plots had excess NO3−-N concentrations (over 30 μg g−1) from month 20 onwards. Therefore, N fertiliser applications could be adjusted to prevent excessive N inputs and increase farm profitability. | |
dc.description.peerreviewed | Yes | |
dc.language | English | |
dc.language.iso | eng | |
dc.publisher | Springer Science and Business Media LLC | |
dc.relation.ispartofjournal | Environmental Science and Pollution Research | |
dc.subject.fieldofresearch | Chemical sciences | |
dc.subject.fieldofresearch | Horticultural production | |
dc.subject.fieldofresearch | Soil chemistry and soil carbon sequestration (excl. carbon sequestration science) | |
dc.subject.fieldofresearchcode | 34 | |
dc.subject.fieldofresearchcode | 3008 | |
dc.subject.fieldofresearchcode | 410604 | |
dc.subject.keywords | Macadamia integrifolia | |
dc.subject.keywords | Nitrogen isotope composition | |
dc.subject.keywords | Nitrogen retention | |
dc.subject.keywords | Photosynthesis | |
dc.subject.keywords | Wood-based biochar | |
dc.title | Soil-plant nitrogen isotope composition and nitrogen cycling after biochar applications | |
dc.type | Journal article | |
dc.type.description | C1 - Articles | |
dcterms.bibliographicCitation | Asadyar, L; Xu, CY; Wallace, HM; Xu, Z; Reverchon, F; Bai, SH, Soil-plant nitrogen isotope composition and nitrogen cycling after biochar applications, Environmental Science and Pollution Research, 2020 | |
dcterms.dateAccepted | 2020-09-25 | |
dc.date.updated | 2020-10-16T03:02:02Z | |
gro.description.notepublic | This publication has been entered in Griffith Research Online as an advanced online version. | |
gro.hasfulltext | No Full Text | |
gro.griffith.author | Xu, Zhihong | |
gro.griffith.author | Hosseini-Bai, Shahla | |