To explore the various degree water input influence on soil respiration in subtropical monsoon climate region

selected mixed broadleaf-conifer forest of Chongqing Jinyun Mountain Nature Reserves as the research object in 2014. The artificial blocking and increasing water were used to simulate different precipitation input

and then to analyze the impact (including 70% of saturated soil water content (addition 70%: 70%A)

100% (addition 100%: 100%A)

130% (addition 130%: 130%A)

comparison (CK) and no precipitation (Z)). The result shows that: (1)All the diurnal changes of soil respiration formed a curve under the different water inputs

and it reached the maximum value during 12:00 to 14:00; and the same as monthly variation

it reached the maximum value in August and the minimum value in December; (2)Properly increased water could improve the Pearson correlation between soil respiration rate and soil temperature of 10 cm soil depth

but the best fitting of exponential model was comparison group. Reducing water and excessive increase water would reduce its correlation; the same as the temperature-sensitivity coefficient Q10; (3)The correlation of soil respiration rate and soil water content of 10 cm soil depth was low as a whole

but the influence was obvious. In addition to no precipitation showed significantly positive correlation

it almost off the mark between comparison and water content

and it negatively correlated between water addition and water content

especially the addition 130% was marked negative correlation; (4)In General

water addition 100% improved the soil respiration rate

expanded its excursion

water reduction reduced the soil respiration rate in the study region nature environment.