Transformation of organic phosphorus during .i.Picea abies./i. needle litter decomposition

0040413 - UPB-H 2006 RIV SK eng C - Conference Paper (international conference)
Novák, František - Hrabal, R. - Koukol, Ondřej - Bartošová, I. - Kalčík, Jiří
Transformation of organic phosphorus during Picea abies needle litter decomposition.
[Transformace organického fosforu v průběhu dekompozice jehlic smrku Picea abies]
Proceedings of the 6th International Conference "Humic Substances in Ecosystems". Nitra: Slovak Agricultural University, 2005, s. 122-126.
[International Conference "Humic Substances in Ecosystems" /6./. Racková dolina (SK), 19.06.2005-22.06.2005]
R&D Projects: GA ČR(CZ) GA206/05/0269; GA ČR(CZ) GA206/02/1504
Institutional research plan: CEZ:AV0Z60660521; CEZ:AV0Z60050516
Keywords : decomposition * humic acid * organic phosphorus
Subject RIV: EH - Ecology, Behaviour

The paper deals with relationships between litter decomposition and organic P status, determined by solution ³¹P-NMR spectra of humic acids (HA) or alkaline plant extract. By using the ³¹P NMR spectroscopy we studied the composition of P in two HA from different soil types and the P transformation during decomposition of plant litter. The needle litter, collected from O_l horizon under native mountain stand of Norway spruce (Picea abies [L.] Karst.) and sterilized by gamma radiation, was inoculated with saprotrophic fungi Marasmius androsaceus (L.) Fr. and Penicillium cf. purpurogenum Stoll. After a long-term cultivation in the dark at laboratory temperature, we isolated HA and measured their ³¹P NMR spectra. Spectra of these HA were compared with spectra of HA isolated from vermiculture, podzol A_e and gleysol A_t soil horizons, and with alkaline extract of fresh spruce needles.

Článek se zabývá vztahem mezi dekompozicí smrkového opadu a složením organického fosforu, stanoveným pomocí ³¹P NMR spektroskopie. Bylo zjištěno, že aktivita hub se projevuje výrazným poklesem obsahu monoesterů fosfátu za současného nárůstu obsahu polyfosfátů a diesterů fosfátu (zejména DNA).
Permanent Link: http://hdl.handle.net/11104/0134138