| dc.creator | Brouwere,Katleen De | |
| dc.creator | Thijs,Ann | |
| dc.creator | Hens,Maarten | |
| dc.creator | Merckx,Roel | |
| dc.date | 2003-01-01 | |
| dc.date.accessioned | 2020-02-17T15:31:24Z | |
| dc.date.available | 2020-02-17T15:31:24Z | |
| dc.identifier | https://scielo.conicyt.cl/scielo.php?script=sci_arttext&pid=S0717-66432003000100004 | |
| dc.identifier.uri | https://revistaschilenas.uchile.cl/handle/2250/129622 | |
| dc.description | This study investigated the different forms and availability of P in soil profiles from temperate forests in southern Chile (two sites: Nothofagus obliqua (Mirb.) Bl. and Nothofagus betuloides (Mirb.) Oerst.) and Flanders, Belgium (two sites: Pinus nigra Arnold and Betula pendula Roth). Soils were sampled according to genetic horizonation and analysed for organic matter, oxalate-extractable P, Al and Fe, total inorganic P and total organic P. Phosphorus availability was assessed using an isotopic exchange technique and anion exchange membranes. The total P content was higher for the Chilean andosols and remained relatively high in the whole soil profile (1413-187 mg P kg-1) whereas total P decreased sharply in the lower horizons of the Flemish podzols (575-4 mg P kg-1). There was a strong predominance of organic P in the Chilean soils (up to 90% of total P). The high volcanic activity in Chile is responsible for the large amounts of allophone, which entail high P-fixing capacities in these soils. Notwithstanding the much larger total P content in Chilean andosols compared to the Flemish podzols, both soil types feature comparable amounts of available P (AEM-P). The two phosphorus availability indices (IEP and AEM-P) correlated rather well for the Flemish forest sites (R² = 0.67), while the same correlation was lacking for the Chilean soil profiles (R² = 0.11). However, a strong relation between AEM-P and the organic matter content of the andosols emerged. The presence of Al and DOC in the AEM-extracts of eight selected Chilean soil samples suggests the extraction of organo-mineral colloids by the membrane. The lack of correlation between AEM-P and IEP for the Chilean soils may be related to the presence of these colloids, as they may lead to an overestimation of IEP as well as biased AEM-P values. Differences in forms and availability of phosphorus between the Chilean and the Flemish soil profiles were mostly ascribed to differences in soil properties rather than to differences in anthropogenic influences | |
| dc.format | text/html | |
| dc.language | en | |
| dc.publisher | Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción | |
| dc.relation | 10.4067/S0717-66432003000100004 | |
| dc.rights | info:eu-repo/semantics/openAccess | |
| dc.source | Gayana. Botánica v.60 n.1 2003 | |
| dc.subject | Andosols | |
| dc.subject | phosphorus availability | |
| dc.subject | podzols | |
| dc.title | FORMS AND AVAILABILITY OF SOIL PHOSPHORUS IN TEMPERATE FORESTS IN SOUTHERN CHILE AND FLANDERS | |
