|
| Effect of greenhouse cultivation on the decomposition of organic carbon in agricultural soils |
| Received:August 28, 2017 |
| View Full Text View/Add Comment Download reader |
| KeyWord:greenhouse soil;soil organic carbon;temperature sensitivity(Q10);interactive effect;Shouguang City |
| Author Name | Affiliation | | TAO Bao-xian | College of Environment and Planing, Liaocheng University, Liaocheng 252059, China | | ZHANG Bao-hua | Department of Science and Technology, Liaocheng University, Liaocheng 252059, China | | DONG Jie | College of Environment and Planing, Liaocheng University, Liaocheng 252059, China | | LIU Chen-yang | College of Environment and Planing, Liaocheng University, Liaocheng 252059, China |
|
| Hits: 2042 |
| Download times: 2130 |
| Abstract: |
| An incubation experiment was conducted to investigate the interactive effect of temperature and land use change, either from farmland (FL) to greenhouse soil (GH) or in abandoned greenhouse soil (AG), on the decomposition of soil organic carbon (SOC) in Shouguang City. Temperature increased the cumulative SOC decomposition by 56.08%, 42.32%, and 42.36% in the FL, GH, and AG, respectively (P<0.01). Land use change from FL to GH significantly enhanced SOC decomposition (P<0.05), and the cumulative SOC decomposition of the GH increased by 185.81% at 25℃ and by 160.61% at 35℃. The positive effect of temperature on SOC decomposition was greater in the GH than in the FL, possibly owing to the GH's larger Q10 value of the labile SOC fractions (Q10=1.79 vs. Q10=1.37) and the larger concentration of particulate organic carbon. The interactive effect of temperature and land use change from FL to AG was additive, owing to the similar labile SOC Q10 values of the two land use types (Q10=1.41). In general, the GH exhibited greater cumulative SOC decomposition than the FL, and the combination of temperature and land use change (from FL to GH) produced a synergistic effect on SOC decomposition. Therefore, the interactive of land use change and temperature on SOC decomposition may be underestimated based on the separate effects of each factor. |
|
|
|
