Incorporation of natural hydrocarbons from plant residues into an hydromorphic humic podzol following afforestation and fertilization
1991
Jambu, P. | Ambles, A. | Dinel, H. | Secouet, B.
The content and composition of natural hydrocarbons from plant residues (Pinus maritima sp.) of a hydromorphic humic podzol were investigated following the addition of NPK and P fertilizers. L and F layers and the Al horizon from non-fertilized and fertilized soil were analysed for total lipids and hydrocarbons, and non-linear and linear hydrocarbons. The decrease in non-linear hydrocarbons extracted following the addition of fertilizers was attributed to the incorporation of non-linear hydrocarbons into humus, rather than to their biodegradation by soil micro-organisms. Short- and medium-chain linear hydrocarbons from plant residues or of microbial origin were rapidly biodegraded or fixed by soil micro-organisms, resulting in a very low concentration in the Al horizon. In contrast, long-chain linear hydrocarbons of plant origin accumulated in the non-fertilized soil, while the addition of P fertilizer slightly stimulated their biodegradation.
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