Abstract:To investigate the combined influence of enhanced UV-B radiation and straw addition on CO2 emission from soil-winter wheat system, field experiments were carried out during winter wheat growing season. CO2 fluxes were measured by static chamber-gas chromatograph method. Enhanced UV-B radiation and straw addition did not change the seasonal pattern of CO2 emission. Enhanced UV-B radiation (U) had a negative effect on mean CO2 emission (MCE), which declined by 15.48% (P=0.055) during jointing-booting stage. During turning-green and jointing-booting stage, straw addition (S) had a positive effect on MCE, which increased by 59.52% (P=0.005) and 13.10% (P=0.092), respectively. Straw addition and enhanced UV-B radiation treatment (SU) increased MCE by 30.95% (P=0.083) in turning-green stage. Significant relationship were found between CO2 emission and air temperature under the control, U, S and SU, and the fitting equation determined coefficients R2 were 0.56、0.60、0.45 and 0.51. The Q10 (temperature sensitivity coefficients) were 1.83、1.97、1.55 and 1.70, respectively.
胡正华, 杨燕萍, 陈书涛, 李涵茂, 李岑子, 申双和. UV-B增强与秸秆施用对土壤-冬小麦系统CO2排放影响[J]. 中国环境科学, 2010, 30(8): 1130-1134.
HU Zheng-Hua, YANG Yan-Ping, CHEN Shu-Tao, LI Han-Mao, LI Cen-Zi, SHEN Shuang-He. Combined effect of enhanced UV-B radiation and straw addition on CO2 emission from soil-winter wheat system.. CHINA ENVIRONMENTAL SCIENCECE, 2010, 30(8): 1130-1134.