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Soil Carbon Pools inAdjacent Natural andPlantation Forests ofSubtropical Australia Chengrong ChenZhihong XuNicole J. Mathers2004 год

Soil Carbon Pools in Adjacent Natural and Plantation Forests of Subtropical Australia
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Аннотация: Soil C dynamics are not only important to both productivity and sustainability of terrestrial ecosystems, but also contribute significantly to global C cycling. Adjacent natural forest (NF), and first (1R) and second rotation (2R) hoop pine ( Araucaria cunninghamii Aiton ex A. Cunn.) plantations in southeast Queensland, Australia, were selected to investigate the effects of conversion of NF to hoop pine plantations and forest management (harvesting and site preparation of plantation) on the size and the nature of C pools in surface (0–10 cm) soils using chemical extraction, laboratory incubation and 13 C cross‐polarization with magic‐angle‐spinning nuclear magnetic resonance spectroscopy ( 13 C CPMAS NMR). Conversion from NF to hoop pine plantations not only led to the reduction of soil total C (by 19.8%), water‐soluble organic C (WSOC) (by 17.7%), CaCl 2 –extractable organic C (by 38.8%), and hot water‐extractable organic C (HWEOC) (by 30.9%) and bioavailability of soil C (as determined by CO 2 evolved in the incubation), but also to a change in chemical composition of soil C with lower O‐alkyl C and higher alkyl C under the 1R plantation compared with NF. Harvesting and site preparation did not significantly affect total soil C and most labile C pools (except for a decrease in WSOC), but led to a lower signal intensity in the alkyl C spectral region and a decreased alkyl C/O‐alkyl C (A/O‐A) ratio in the soil under the 2R compared with the 1R plantation. The shifts in the amount and nature of soil C following forest conversion may be attributed to changes in litter inputs, microbial diversity and activity, and the disturbance of soil during harvesting and site preparation.
Год издания: 2004
Авторы: Chengrong Chen, Zhihong Xu, Nicole J. Mathers
Издательство: Wiley
Источник: Soil Science Society of America Journal
Ключевые слова: Soil Carbon and Nitrogen Dynamics, Soil Geostatistics and Mapping, Soil and Water Nutrient Dynamics
Другие ссылки: Soil Science Society of America Journal (HTML)
Griffith Research Online (Griffith University) (PDF)
Griffith Research Online (Griffith University) (HTML)
Queensland Department of Agriculture and Fisheries archive of scientific and research publications (Queensland Department of Agriculture and Fisheries) (PDF)
Queensland Department of Agriculture and Fisheries archive of scientific and research publications (Queensland Department of Agriculture and Fisheries) (HTML)