Five‐Year Soil Respiration Reflected Soil Quality Evolution in Different Forest and Grassland Vegetation Types in the Eastern Loess Plateau of China

摘要: Soil CO2 efflux in forest and grassland over 5 years from 2005 to 2009 a semiarid mountain area of the Loess plateau, China, was measured. The aim compare soil respiration its annual inter-annual responses changes temperature water content between two vegetation types for observing quality evolution. differences among five study were precipitation (320.1, 370.5, 508.8, 341.6, 567.4mm 2005-2009, respectively) distribution. results showed that seasonal change both similar controlled by content. mean across (3.78 +/- 2.68 mu mol m(-2)s(-1)) less than (4.04 3.06 m(-2)s(-1)), difference significant. drought summer depressed substantially. Q(10) value 5-year measurements 2.89 2.94 grassland. When wilting point (WP) field capacity (FC), increased with increasing content, when dropped below WP, decreased Although an exponential model well fitted predict each single year data, it overestimated underestimated respiration, respectively, conditions after rain short periods time during year. two-variable models including variables could be used all weather conditions. proposed are useful understanding predicting potential eastern part plateau response climate change.