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Response of Leptospermum scoparium, Kunzea robusta and Pinus radiata to contrasting biowastes

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posted on 09.04.2019 by Esperschuetz, Juergen, Christopher W.N. Anderson, O. Katamian, Jacqui Horswell, Simon R. Bulman, Nicholas M. Dickinson, Brett H. Robinson
The myrtaceae family has a cosmopolitan distribution and includes the Australasian native species Leptospermum scoparium (manuka) and Kunzea robusta (kanuka), which are of economic interest for the production of high value honey and essential oils. Potentially, these species could be established on low-fertility or degraded soils that have been amended with biowastes, including biosolids and sawdust. We aimed to determine the effect of these biowastes on nitrate leaching and the growth and chemical composition of these plant species compared to Pious radiata (pine), a common forestry species. The addition of biosolids (1250 kg N ha(-1) equiv.) increased the total dry biomass of manuka, kanuka, and pine by 117, 90, and 86% respectively. Mixing sawdust with biosolids stimulated growth of manuka (52%), kanuka (121%) but not pine. Biosolids increased plant uptake of N,P, and trace elements, but not to levels of concern. Nitrate leaching from all treatments was negligible (<2 kg ha(-1)). (C) 2017 Elsevier B.V. All rights reserved.
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Funding

Deutsche Forschungsgemeinschaft (DFG, ES 416/1-1)

Center of Integrated Biowaste Research (CIBR)

Plant & Food Research (Blueskies fund)

Environmental Science and Research (Pioneer fund)

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