Response of soil respiration to soil and water conservation measures in Castanea mollissima plantations
Ye Gongfu, Huang Shide, Yang Zhijie, Chen Zhen, Zhu Hongru
(1.Fujian Academy of Forestry; 2. Fujian Normal University; 3. Fujian Agriculture and Forestry University; 4. Fujian Forestry Investigating and Planning Institute：350000, Fuzhou, China)
Abstract：In order to ascertain the response of soil respiration to soil and water conservation measures, soil respiration rates of four Castanea mollissima plantations in the HenTian Town were measured with an infrared gas analyzing method by using an open-flow gas exchange system from March 2009 to September 2010. The results show that: 1) soil water content was improved to some extent after implementing soil and water conservation measures, especially with the prolonged years of application, the temporal and spatial of soil water contents was significantly improved. 2) Soil respiration rates of four Castanea mollissima plantations changed as an one-humped curve, There was no obvious effect of soil and water conservation measures on the seasonal patterns of soil respiration. 3）The reference respiration R10 values in the plotⅠand Ⅲ were 1.718 and 1.595μmol/(m2·s), respectively; with soil and water conservation measures in the plot Ⅱ and Ⅳ R10 values decreased to 1.092 and 1.324μmol/(m2·s), after implementing measures. The temperature sensitivity index Q10 values in the plotⅠand Ⅲ were 1.927 and 1.899; after implementing measures, for the same reason in the plot Ⅱ and IV Q10 values slightly increased to some extent after implementing soil and water conservation measures, which could influence of soil temperature and soil moisture to some extent. The study provided base data to consider soil and water conservation measures as a potential mode of fixing carbon and reducing emission in soil severely eroded areas.
2013, Vol. 11 
