Soil CO2effluxes, temporal and spatial variations, and root respiration in shrub willow biomass crops fields along a 19-year chronosequence as affected by regrowth and removal treatments
| Autor: | Eddie Bevilacqua, Renato S. Pacaldo, Lawrence P. Abrahamson, Timothy A. Volk, Russell D. Briggs, Eric S. Fabio |
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| Rok vydání: | 2013 |
| Předmět: |
Willow
biology Renewable Energy Sustainability and the Environment ved/biology Chronosequence ved/biology.organism_classification_rank.species Growing season Forestry Soil classification biology.organism_classification Shrub Animal science Botany Respiration Spatial variability Waste Management and Disposal Agronomy and Crop Science Woody plant |
| Zdroj: | GCB Bioenergy. 6:488-498 |
| ISSN: | 1757-1693 |
| Popis: | In shrub willow biomass crop (SWBC) production systems, the soil CO2 efflux (Fc) component in the carbon cycle remains poorly understood. This study assesses (i) differences of Fc rates among the 5-, 12-, 14-, and 19-year-old SWBCs with two treatments: continuous production (regrowth) willow fields that were harvested and allowed to regrow, and willow fields that were harvested, killed, and then stools and roots were ground into the soil (removal); (ii) temporal and spatial variations of Fc rates; (iii) root respiration contributions to total Fc; and (iv) climatic variables affecting Fc. During the growing season (May to September), Fc rates showed no statistically significant differences across different ages (P = 0.664), and between treatments (P = 0.351); however, there was an interaction between age and treatment (P = 0.001). Similarly, during the dormant season (October to April), Fc rates revealed no statistically significant differences across different ages (P = 0.305) and treatment interaction with age (P = 0.097). Fc rates differed significantly (P |
| Databáze: | OpenAIRE |
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