Soil d13C and d15N as a good indicator for predicting the site index of Galician pine forests (Pinus pinaster Ait. and Pinus sylvestris L.)
| Autor: | Serafín J. González-Prieto, Ana Cabaneiro, Irene Fernández, L. Pérez-Ventura |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
15N/14N
Soil Science Site index Horticulture Abundance (ecology) Soil pH 13C/12C Materia orgánica del suelo Calidad forestal Ecology Evolution Behavior and Systematics Stable isotopes Soil organic matter biology Stable isotope ratio Ecology silviculture Forestry biology.organism_classification Pinus physiology Forest quality Soil water NW Spain Pinus pinaster Environmental science Isótopos estables NO España Agronomy and Crop Science Tree species |
| Zdroj: | Forest Systems; Vol 15, No 1 (2006); 3-13 Forest Systems Instituto Nacional de Tecnología Agraria y Alimentaria (INIA) |
| ISSN: | 2340-3578 1131-7965 2171-9845 |
| DOI: | 10.5424/srf/2006151-00949 |
| Popis: | Stable isotopes natural abundance (13C, 15N) was studied in soils from P. pinaster Ait. and P. sylvestris L. plantations located in Galicia, NW Spain, to evaluate the use of isotopic techniques for stand quality estimation. Combinations of old/young forest plantations of high/low site index, growing on acidic soils over two different parent materials (granite/schists) were studied. Significantly lower 13C in soils under P. pinaster (–27.03‰) as compared with soils under P. sylvestris (–26.13‰) were found (P < 0.001). However, soil 15N of both species did not differ significantly. Significant linear regressions between soil 13C and site index for P. pinaster were found, pointing at the 13C signature of the soil as a good stand quality indicator, especially over schists. For P. sylvestris over schists, linear regression between soil 15N and site index suggests that 15N could be used as a complementary tool in quality determinations. As a general trend for both tree species, stands with high site index showed more depleted soils in 13C and 15N as compared with low site index stands. Se determinó la abundancia natural de los isótopos estables 13C y 15N en suelos ácidos bajo P. pinaster Ait. y P. sylvestris L. de Galicia (NO España) para evaluar su uso en estimaciones de calidad de estación. Se estudiaron combinaciones de las siguientes variables: roca (granito/esquistos), edad (joven/madura) y calidad (alto/bajo índice de sitio) de la masa arbórea. Los suelos bajo P. pinaster presentaron d13C (–27,03‰) menores (P < 0,001) que los suelos bajo P. sylvestris (–26,13‰). El d15N del suelo no difirió significativamente entre ambas especies. Las regresiones lineales significativas entre el índice de sitio y la composición isotópica del suelo, especialmente sobre esquistos, señalan al d13C del suelo como un buen indicador de calidad para P. pinaster, mientras que para suelos bajo P. sylvestris es el d15N el isótopo más útil en las determinaciones de calidad. En general para ambas especies, parcelas con alto índice de sitio presentaron suelos más pobres en 13C y 15N que parcelas con bajo índice de sitio. |
| Databáze: | OpenAIRE |
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