|
| Effects of elevated atmospheric CO2 concentration and temperature on soil respiration and enzyme activity in a wheat field |
| Received:December 12, 2016 |
| View Full Text View/Add Comment Download reader |
| KeyWord:elevated CO2 concentration;experimental warming;winter wheat;enzyme activity;soil respiration |
| Author Name | Affiliation | E-mail | | LIU Yuan | College of Life Science, Huaibei Normal University, Huaibei 235000, China | | | PAN Gen-xing | College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China | | | ZHANG Hui | College of Life Science, Huaibei Normal University, Huaibei 235000, China | | | LI Feng | College of Life Science, Huaibei Normal University, Huaibei 235000, China | | | WANG Guang-li | College of Life Science, Huaibei Normal University, Huaibei 235000, China | wanf-3344@163.com |
|
| Hits: 2416 |
| Download times: 3054 |
| Abstract: |
| The aim of this study was to examine the effects of elevated atmospheric CO2 concentration and temperature on soil respiration and urease and invertase activity in an open field. Field treatments included ambient CO2 concentration and air temperature(CK), elevated CO2 concentration(CE), experimental air warming(WA), and interactive CO2 enrichment and air warming(CW). The results showed that soil respiration rates increased significantly under WA and CW as compared to that under CK, while those of CE did not change significantly in the wheat-growing season. At the tillering stage, there were no changes in the activities of urease or invertase. However, the invertase activity under CW and WA was increased significantly at the heading and ripening stages, while that of CE only increased at the heading stage. Compared to CK, there was no significant change in the urease activity under CE treatment, but WA treatment resulted in increases in the urease activity at ripening stages. These findings suggested that the effects of elevated CO2 and warming on soil respiration and enzyme activities were different among the tillering, heading, and ripening stages. The responses of soil respiration, urease, and invertase were much more sensitive to warming than to elevated CO2. |
|
|
|
