| Yazarlar (6) |
Prof. Dr. Renato Sabanal PACALDO
Kastamonu Üniversitesi, Türkiye |
|
Timothy A. Volk
|
|
Russell D. Briggs
|
|
Lawrence P. Abrahamson
|
|
Eddie Bevilacqua
|
|
Eric S. Fabio
|
| Özet |
| 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 < 0.001) among different times of the day and times of the year. Fc rates, between 00 and 1059 h, between 1100 and 1659 h, and between 1700 and 2400 h displayed consistency from May to November; however, Fc rates in these three time intervals showed significant differences (P < 0.0001). In December, Fc rates remained constant over 24 h. Fc rates demonstrated higher temporal and spatial variations among willow age classes than between regrowth and removal treatments. Temporal and spatial variations of Fc were higher during the dormant season than during the growing season. The proportion of root respiration to total Fc ranged from 18 to 33% across age classes. Fc rates showed strong association with soil and air temperatures, and relative humidity. © 2013 John Wiley & Sons Ltd. |
| Anahtar Kelimeler |
| age | air temperature | carbon cycle | dormant season | growing season | relative humidity | soil moisture | soil temperature |
| Makale Türü | Özgün Makale |
| Makale Alt Türü | ESCI dergilerinde yayımlanan tam makale |
| Dergi Adı | GLOBAL CHANGE BIOLOGY BIOENERGY |
| Dergi ISSN | 1757-1693 Wos Dergi Scopus Dergi |
| Makale Dili | İngilizce |
| Basım Tarihi | 09-2014 |
| Cilt No | 6 |
| Sayı | 5 |
| Sayfalar | 488 / 498 |
| Doi Numarası | 10.1111/gcbb.12108 |
| Atıf Sayıları | |
| WoS | 15 |
| SCOPUS | 15 |
