Response of Pinus radiata D. Don to Boron Fertilization in a Glasshouse Study

Khan, RU; Anderson, CWN; Loganathan, P; Xue, J; Clinton, PW

Response of Pinus radiata D. Don to Boron Fertilization in a Glasshouse Study

Khan, RU Anderson, CWN Loganathan, P Xue, J Clinton, PW

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Publication Type:: Journal Article
Citation:: Communications in Soil Science and Plant Analysis, 2012, 43 (10), pp. 1412 - 1426
Issue Date:: 2012-05-01

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Field	Value	Language
dc.contributor.author	Khan, RU	en_US
dc.contributor.author	Anderson, CWN	en_US
dc.contributor.author	Loganathan, P	en_US
dc.contributor.author	Xue, J	en_US
dc.contributor.author	Clinton, PW	en_US
dc.date.issued	2012-05-01	en_US
dc.identifier.citation	Communications in Soil Science and Plant Analysis, 2012, 43 (10), pp. 1412 - 1426	en_US
dc.identifier.issn	0010-3624	en_US
dc.identifier.uri	http://hdl.handle.net/10453/113899
dc.description.abstract	Limited information is available on the effect of slow-release boron (B) fertilizer on Pinus radiata growth and physiological properties and soil microbiological activities. A 7-month-long pot experiment was carried out under glasshouse conditions to investigate the response of Pinus radiata to different rates (0.0222, 0.0446, 0.089, and 0.178 mg B g-1 soil), equivalent to 0, 4, 8 16, and 32 kg B ha-1 of ulexite, a slow-release B fertilizer. Hot 0.02 M calcium chloride (CaCl2)-extractable soil B, soil dehydrogenase activity, plant B concentration, growth, and photosynthesis were measured at the time of harvest. The B concentrations in the soil and plant organs (needles, stem, and roots) significantly increased with increasing rates of B fertilizer. The optimum B fertilizer rates of 4-8 kg B ha-1 produced the greatest plant growth and net photosynthetic rate. However, the B rates of 16 and 32 kg B ha-1 significantly reduced net photosynthetic rate, and the rate of 32 kg B ha-1 significantly reduced stem diameter growth when compared to the optimum B rates. Soil dehydrogenase activity, an indicator of soil microbiological activities, was significantly reduced by B application at the rates of 16 and 32 kg ha-1. This study confirms the narrow range between B deficiency and toxicity in a tree crop and stresses the need for selection of the optimum rate of B fertilizer application. © 2012 Copyright Taylor and Francis Group, LLC.	en_US
dc.relation.ispartof	Communications in Soil Science and Plant Analysis	en_US
dc.relation.isbasedon	10.1080/00103624.2012.670345	en_US
dc.subject.classification	Agronomy & Agriculture	en_US
dc.title	Response of Pinus radiata D. Don to Boron Fertilization in a Glasshouse Study	en_US
dc.type	Journal Article
utslib.citation.volume	10	en_US
utslib.citation.volume	43	en_US
utslib.for	0503 Soil Sciences	en_US
utslib.for	0607 Plant Biology	en_US
utslib.for	0703 Crop and Pasture Production	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
utslib.copyright.status	closed_access
pubs.issue	10	en_US
pubs.publication-status	Published	en_US
pubs.volume	43	en_US

Abstract:

Limited information is available on the effect of slow-release boron (B) fertilizer on Pinus radiata growth and physiological properties and soil microbiological activities. A 7-month-long pot experiment was carried out under glasshouse conditions to investigate the response of Pinus radiata to different rates (0.0222, 0.0446, 0.089, and 0.178 mg B g-1 soil), equivalent to 0, 4, 8 16, and 32 kg B ha-1 of ulexite, a slow-release B fertilizer. Hot 0.02 M calcium chloride (CaCl2)-extractable soil B, soil dehydrogenase activity, plant B concentration, growth, and photosynthesis were measured at the time of harvest. The B concentrations in the soil and plant organs (needles, stem, and roots) significantly increased with increasing rates of B fertilizer. The optimum B fertilizer rates of 4-8 kg B ha-1 produced the greatest plant growth and net photosynthetic rate. However, the B rates of 16 and 32 kg B ha-1 significantly reduced net photosynthetic rate, and the rate of 32 kg B ha-1 significantly reduced stem diameter growth when compared to the optimum B rates. Soil dehydrogenase activity, an indicator of soil microbiological activities, was significantly reduced by B application at the rates of 16 and 32 kg ha-1. This study confirms the narrow range between B deficiency and toxicity in a tree crop and stresses the need for selection of the optimum rate of B fertilizer application. © 2012 Copyright Taylor and Francis Group, LLC.

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http://hdl.handle.net/10453/113899