Distribution of phosphorus in sandy soils of coastal fynbos

Simple item page
dc.contributor.advisorMitchell, D Ten_ZA
dc.contributor.authorBrown, Gary Jamesen_ZA
dc.date.accessioned2016-09-25T16:51:57Z
dc.date.available2016-09-25T16:51:57Z
dc.date.issued1983en_ZA
dc.descriptionBibliography: pages 123-142.en_ZA
dc.description.abstractThe levels of soil phosphorus (both total and plant available) were investigated at the Pella intensive study site and were found to be low. Resin extractable phosphorus fluctuated seasonally, peaking at the soil surface during summer and declining to a minimum in the winter months. Rates of microbial mineralisation were thought to be the major influencing factor. The profile distribution of all forms of phosphorus were similar to those predicted by Smeck (1973) and were thought to result from the removal of phosphorus by plant roots in the mid-zone (20-70 cm) and its subsequent deposition at the soil surface as litter. The majority of insoluble phosphorus (60%) was organic and the remaining insoluble inorganic compounds were mainly iron bound. The input from precipitation to the site was 194 g ha⁻¹ yr⁻¹ occurring chiefly during the winter months. The different soil forms present at the site contained similar total phosphorus levels and underwent an increase in the size of the resin extractable phosphorus pool with progression from less to more weathered soils. This progressive change was linked directly to the decrease in total iron content in the soils. With decreasing iron content the number of binding sites within the soil declined. Fire returned a large amount of readily available phosphorus to the soil which had the effect of immediately elevating the soil resin extractable phosphorus levels. This effect was a transient one. After twelve months the levels of resin extractable phosphorus had declined to values only slightly above those found in the prefire soil.en_ZA
dc.identifier.apacitationBrown, G. J. (1983). <i>Distribution of phosphorus in sandy soils of coastal fynbos</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Biological Sciences. Retrieved from http://hdl.handle.net/11427/21937en_ZA
dc.identifier.chicagocitationBrown, Gary James. <i>"Distribution of phosphorus in sandy soils of coastal fynbos."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 1983. http://hdl.handle.net/11427/21937en_ZA
dc.identifier.citationBrown, G. 1983. Distribution of phosphorus in sandy soils of coastal fynbos. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Brown, Gary James AB - The levels of soil phosphorus (both total and plant available) were investigated at the Pella intensive study site and were found to be low. Resin extractable phosphorus fluctuated seasonally, peaking at the soil surface during summer and declining to a minimum in the winter months. Rates of microbial mineralisation were thought to be the major influencing factor. The profile distribution of all forms of phosphorus were similar to those predicted by Smeck (1973) and were thought to result from the removal of phosphorus by plant roots in the mid-zone (20-70 cm) and its subsequent deposition at the soil surface as litter. The majority of insoluble phosphorus (60%) was organic and the remaining insoluble inorganic compounds were mainly iron bound. The input from precipitation to the site was 194 g ha⁻¹ yr⁻¹ occurring chiefly during the winter months. The different soil forms present at the site contained similar total phosphorus levels and underwent an increase in the size of the resin extractable phosphorus pool with progression from less to more weathered soils. This progressive change was linked directly to the decrease in total iron content in the soils. With decreasing iron content the number of binding sites within the soil declined. Fire returned a large amount of readily available phosphorus to the soil which had the effect of immediately elevating the soil resin extractable phosphorus levels. This effect was a transient one. After twelve months the levels of resin extractable phosphorus had declined to values only slightly above those found in the prefire soil. DA - 1983 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1983 T1 - Distribution of phosphorus in sandy soils of coastal fynbos TI - Distribution of phosphorus in sandy soils of coastal fynbos UR - http://hdl.handle.net/11427/21937 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/21937
dc.identifier.vancouvercitationBrown GJ. Distribution of phosphorus in sandy soils of coastal fynbos. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 1983 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/21937en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Biological Sciencesen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherBotanyen_ZA
dc.titleDistribution of phosphorus in sandy soils of coastal fynbosen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMScen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
thesis_sci_1983_brown_gary_james.pdf
Size:
1.75 MB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Masters