AI Article Synopsis
- A field experiment in 2008 studied how enhanced UV-B radiation and straw application affect soil respiration in soybean fields using an automated CO2 flux system to measure results.
- Findings showed that enhanced UV-B radiation decreased soil respiration by 30.31%, while straw application increased it by 14.51%, and the combination of both treatments had no significant impact.
- The study also identified a positive relationship between soil respiration rates and soil temperature across the different treatments, with notable temperature sensitivity coefficients (Q10) indicating that UV-B radiation and straw application influenced soil respiration dynamics.
Article Abstract
Field experiment was carried out in 2008 in order to investigate the effects of enhanced UV-B radiation and straw application on soil respiration in soybean field. LI-8100 automated soil CO2 flux system was used to measure soil respiration under 20% enhanced UV-B radiation, straw application, 20% enhanced UV-B radiation + straw application and control. Environmental factors such as air temperature, soil temperature and moisture were also measured. Results indicated that supplemental UV-B radiation reduced soil respiration rate by 30.31%, straw application increased soil respiration rate by 14.51%, while enhanced UV-B radiation + straw application combined treatment had no significant effect on soil respiration. Enhanced UV-B radiation enhanced the carbon conversion rate of straw. Significant relationship were found between soil respiration rate and soil temperature under the control, enhanced UV-B, straw application, and enhanced UV-B + straw application, the fitting equation determined coefficients R2 were 0.434, 0.563, 0.451 and 0.513. The Q10 (temperature sensitivity coefficients) for soil respiration were 1.55, 1.91, 1.80 and 1.71, respectively. It was reflected that enhanced UV-B radiation, straw application and enhanced UV-B radiation + straw returning increased the Q10 for soil respiration.
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