Measurement of in situ phosphorus availability in acidified soils using iron-infused resin.

0459981 - BC 2017 RIV US eng J - Článek v odborném periodiku
Tahovská, K. - Čapek, P. - Šantrůčková, H. - Kaňa, Jiří - Kopáček, Jiří
Measurement of in situ phosphorus availability in acidified soils using iron-infused resin.
Communications in Soil Science and Plant Analysis. Roč. 47, č. 4 (2016), s. 487-494. ISSN 0010-3624. E-ISSN 1532-2416
Grant CEP: GA ČR(CZ) GAP504/12/1218
Institucionální podpora: RVO:60077344
Klíčová slova: acidification * aluminium * forest soil * ion exchange resin * iron * phosphorus availability
Kód oboru RIV: DF - Pedologie
Impakt faktor: 0.589, rok: 2016

A hybrid anion resin was tested for in situ phosphorus (P) availability measurement in soils of two stands recovering from acidification and having different P-sorption characteristics. The phosphate (P-PO4) sorption capacity of the resin (before saturation) was 48 mu mol g(-1). Sorption and elution were tested under P-PO4 concentrations common in acidic soils (0-0.42mmol l(-1)) either with or without the presence of sulfate (0.2mmol l(-1)). The efficiency of P-PO4 sorption was independent of the sulfate and was 100 +/- 0.2% (n=56, +/- SD). The P-PO4 recovery stabilized after six elution steps (each: 50ml of 0.5M sodium hydroxide, resin/solution 5:1). The efficiency of P-PO4 recovery was 80 +/- 7% and was used to evaluate field measurements. We determined the amount of P-PO4 in the field using resin bags in three consecutive years. The results indicate that bioavailable P is negatively related to the soil ability to retain P.
Trvalý link: http://hdl.handle.net/11104/0260148