Skip to Main Content
Effects of phosphorus fertilization, seed source, and soil type on growth of Acacia koaAuthor(s): P. G. Scowcroft; J. A. Silva
Source: Journal of Plant Nutrition 28: 1581-1603
Publication Series: Scientific Journal (JRNL)
View PDF (1016.02 KB)
DescriptionThe endemic tree Acacia koa is used to reforest abandoned agricuItural lands in Hawaii. Growth may be constrained by soil infertility and toxic concentrations of aluminum (AI) and manganese (Mn) in acidic Oxisols and Ultisols, The effects of phosphorus (P) fertilization at time of planting, soil type, and seed source on koa growth were studied for three years. Phosphorus, applied as triple superphosphate and at rates of at least 300 kg P ha-1, significantly increased height, basal stem diameter, crown volume, and aboveground wood biomass of trees from the local (Oahu) seed source, but not those from off island (Hawaii). Manganese toxicity in the Oxisol probably slowed growth of the off-site trees. The local seed source grew similarly in both soil types, but the survival rate was lower in the Ultisol, possibly due to its lower water-holding capacity. Increased growth due to fertilization suggested improved P status, but such improvement was not detected by foliar analysis.
- You may send email to firstname.lastname@example.org to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationScowcroft, P. G.; Silva, J. A. 2005. Effects of phosphorus fertilization, seed source, and soil type on growth of Acacia koa. Journal of Plant Nutrition 28: 1581-1603
KeywordsAcacia koa, acid soils, Oxisol, plantation establishment, tree seedling nutrition, tropical reforestation, Ultisol, Hawaii
- Disturbance during logging stimulates regeneration of koa
- Site preparation affects survival, growth of koa on degraded montane forest land
- Molecular genetic characterization of the koa-wilt pathogen (Fusarium oxysporum): Application of molecular genetic tools toward improving koa restoration in Hawai'i
XML: View XML