Soluble and Plant Available Phosphorus in Acid Soils
(2000)- Abstract
- The P availability and solubility differ between soils and plants seem to have different ways of utilising the P present. The many P fractions present in soil interact and are closely related to another and transformations may easily occur. Due to this more P than the soluble fraction is available to plants. Different plant species utilise the P in soil differently; the relationship between the plant P concentration and the P content of the soil differs among species. More knowledge about plant responses to low P concentrations in soil, and on the replenishment rate of the soluble P pool is needed. Different processes and reactions might also be activated as P status changes, or if the major P pool changes. However, little is known in this... (More)
- The P availability and solubility differ between soils and plants seem to have different ways of utilising the P present. The many P fractions present in soil interact and are closely related to another and transformations may easily occur. Due to this more P than the soluble fraction is available to plants. Different plant species utilise the P in soil differently; the relationship between the plant P concentration and the P content of the soil differs among species. More knowledge about plant responses to low P concentrations in soil, and on the replenishment rate of the soluble P pool is needed. Different processes and reactions might also be activated as P status changes, or if the major P pool changes. However, little is known in this field of research. To determine P solubility in a particular soil, P sorption, pH, P content, distribution of P, and organic matter composition need to be investigated. Another consequence of the close relationship between the P fractions in the soil is that added P is distributed over the soil P fractions and increases the soils overall P status including the most easily available P fractions. The effect of a P fertilisation can be detected long after fertilisation has ceased as increased easily extractable P determined with methods that is considered available to plants. In contrast addition of compounds that increase one particular P fraction of the soil, for example Ca, decreases the soluble P pool in the soil. If this build-up of Ca-phosphates decreases the potentially available fraction is however not certain, this depends on if the fraction formed is in equilibrium with the directly available, more soluble P. (Less)
- Abstract (Swedish)
- Popular Abstract in Swedish
Växter kan tillgodogöra sig en större del av det fosfor som finns i marken än endast det som är mest lättillgängligt. De olika fosforformerna är starkt kopplade till varandra och om fosforn tycks fördela sig mellan dessa. Många extraherbara fosfor fraktioner är väl korrelerade till varandra. Hur mycket fosfor som är tillgängligt för växter är svårt att uppskatta, det varierar mellan olika jordar men olika arter kan även utnyttja fosforn i olika grad. Då fosfor tillförs sur skogsmark höjs markens totala fosforinnehåll och denna ökning kan detekteras efter så lång tid som 10 år efter den sista tillförseln även i lättlösliga fraktioner. Vi måste alltså även se till det fosfor som är potentiellt... (More) - Popular Abstract in Swedish
Växter kan tillgodogöra sig en större del av det fosfor som finns i marken än endast det som är mest lättillgängligt. De olika fosforformerna är starkt kopplade till varandra och om fosforn tycks fördela sig mellan dessa. Många extraherbara fosfor fraktioner är väl korrelerade till varandra. Hur mycket fosfor som är tillgängligt för växter är svårt att uppskatta, det varierar mellan olika jordar men olika arter kan även utnyttja fosforn i olika grad. Då fosfor tillförs sur skogsmark höjs markens totala fosforinnehåll och denna ökning kan detekteras efter så lång tid som 10 år efter den sista tillförseln även i lättlösliga fraktioner. Vi måste alltså även se till det fosfor som är potentiellt tillgängligt för att kunna bedöma en jords fosfor status. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/40226
- author
- Fransson, Ann-Mari LU
- supervisor
- opponent
-
- Dr Harrison, Antony, ITE. Merlewood Research Station, Grange-Over-Sands, U.K.
- organization
- publishing date
- 2000
- type
- Thesis
- publication status
- published
- subject
- keywords
- solubilisation mechanisms, Phosphorus extractions, Oxalate extraction, P fertilisation, Plant ecology, Växtekologi
- pages
- 77 pages
- publisher
- Department of Ecology, Lund University
- defense location
- Blå Hallen Ecology Building
- defense date
- 2000-01-28 10:00:00
- external identifiers
-
- other:ISRN: SE-LundBDS/NBBE-00/1054+77pp
- ISBN
- 91-7105-125-2
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Plant Ecology and Systematics (Closed 2011) (011004000)
- id
- 136eedc2-b80a-4d3b-882f-e421c4b3fa73 (old id 40226)
- date added to LUP
- 2016-04-04 10:31:07
- date last changed
- 2018-11-21 20:59:13
@phdthesis{136eedc2-b80a-4d3b-882f-e421c4b3fa73,
abstract = {{The P availability and solubility differ between soils and plants seem to have different ways of utilising the P present. The many P fractions present in soil interact and are closely related to another and transformations may easily occur. Due to this more P than the soluble fraction is available to plants. Different plant species utilise the P in soil differently; the relationship between the plant P concentration and the P content of the soil differs among species. More knowledge about plant responses to low P concentrations in soil, and on the replenishment rate of the soluble P pool is needed. Different processes and reactions might also be activated as P status changes, or if the major P pool changes. However, little is known in this field of research. To determine P solubility in a particular soil, P sorption, pH, P content, distribution of P, and organic matter composition need to be investigated. Another consequence of the close relationship between the P fractions in the soil is that added P is distributed over the soil P fractions and increases the soils overall P status including the most easily available P fractions. The effect of a P fertilisation can be detected long after fertilisation has ceased as increased easily extractable P determined with methods that is considered available to plants. In contrast addition of compounds that increase one particular P fraction of the soil, for example Ca, decreases the soluble P pool in the soil. If this build-up of Ca-phosphates decreases the potentially available fraction is however not certain, this depends on if the fraction formed is in equilibrium with the directly available, more soluble P.}},
author = {{Fransson, Ann-Mari}},
isbn = {{91-7105-125-2}},
keywords = {{solubilisation mechanisms; Phosphorus extractions; Oxalate extraction; P fertilisation; Plant ecology; Växtekologi}},
language = {{eng}},
publisher = {{Department of Ecology, Lund University}},
school = {{Lund University}},
title = {{Soluble and Plant Available Phosphorus in Acid Soils}},
year = {{2000}},
}