1. Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, 350007, Fuzhou, China; 2. Institute of Geography, Fujian Normal University, 350007, Fuzhou, China; 3. Ministry of Education Key Laboratory of Humid Subtropical Eco Geographical Process, 350007, Fuzhou, China; 4. Fujian Academy of Forestry Science, 350012, Fuzhou, China; 5. College of Forestry, Fujian Agriculture and Forestry University, 350002, Fuzhou, China
Abstract：[Background] Globally, the pool of carbon in soils is greater than the pool contained in vegetation or the atmosphere, and changes in soil carbon content can therefore greatly affect the global carbon budget. Soil respiration is an essential process of carbon cycling in terrestrial ecosystems, thus the knowledge about influence of environmental factors and carbon input on soil respiration is critical for ecosystem management. [Methods] Four 20 m×20 m permanent fixed plots were established in a natural secondary forest in December 2014 in southeastern coast of Fujian Province, China, and four carbon input manipulations of root exclusion, litter exclusion, double litter and control(normal carbon inputs)were carried out in each plot. Monthly soil respiration (Rs) under different carbon input manipulations were measured by Li-8100 from March 2015 to February 2016. In addition, the dissolved organic carbon and microbial biomass carbon were determined after Rs measurement. One-way analysis of variance (ANOVA) with Duncan’s multiple comparison method was used to test the differences of Rs, soil temperature and soil moisture between different carbon input manipulations, besides the linear and nonlinear regression models were used to describe the relationship between seasonal Rs, soil temperature and soil moisture. [Results] The results showed that no significant difference was found for soil temperature and soil moisture at 10 cm depth between different treatments (P＞0.05). The seasonal pattern of Rs was obviously, which was higher in summer and lower in winter during the study period, and the highest fluxes observed in May 2015 or June 2015 and the lowest fluxes occurred in November 2015 or December 2015. The range of annual mean Rs for different treatments was double litter ＞ control ＞root exclusion ＞ litter exclusion, and all Q10 values in different carbon input manipulations were lower than that in control. The contribution of mineral soil, litter layers and roots to total soil respiration was 41.24%, 43.29% and 15.45%, respectively. Rs was significantly and exponentially correlated with soil temperature and linearly and positively correlated with soil moisture at 10 cm depth (P<0.05). The bi-factor models integrated W10 with T10 explained 45%~69% of the variations for Rs. The soil dissolved organic carbon and microbial biomass carbon were also influenced by carbon input changes, and the mean Rs significantly correlated with soil dissolved organic carbon and microbial biomass carbon concentration.[Conclusions] Our findings suggested that carbon input manipulations induced changes in soil labile carbon, and subsequently caused significant effects on soil respiration.
CHEN Youchao, LUO Ji, LI Wei, et al. Comparison of soil respiration among three different subalpine ecosystems on eastern Tibetan Plateau, China[J]. Soil Science and Plant Nutrition, 2014, 60(2): 231.
[2]
LAL R. Soil carbon sequestration impacts on global climate change and food security[J]. Science, 2004, 304: 1623.
[3]
HUANG Yuhui, LI Yuelin, XIAO Yin, et al. Controls of litter quality on the carbon sink in soils through partitioning the products of decomposing litter in a forest succession series in South China[J]. Forest Ecology and Management, 2011, 261(7): 1170.
[4]
ZENG Xinhua, ZHANG Wanjun, SHEN Huitao, et al. Soil respiration response in different vegetation types at Mount Taihang, China[J]. Catena, 2014, 116: 78.
[5]
SCHLESINGER W H, ANDREWS J A. Soil respiration and the global carbon cycle[J]. Biogeochemistry, 2000, 48(1): 7.
[6]
汪金松, 赵秀海, 张春雨, 等. 改变C源输入对油松人工林土壤呼吸的影响[J]. 生态学报, 2012, 32(9): 2768. WANG Jinsong,ZHAO Xiuhai,ZHANG Chunyu,et al. Changes of carbon input influence soil respiration in a Pinus tabulaeformis plantation[J]. Acta Ecologica Sinica, 2012, 32(9): 2768.
[7]
DEFOREST J L, CHEN J, MCNULTY S G. Leaf litter is an important mediator of soil respiration in an oak-dominated forest[J]. International Journal of Biometeorology, 2009, 53(2): 127.
[8]
RAICH J W, SCHLESINGER W H. The global carbon dioxide flux in soil respiration and its relationship to vegetation and climate[J]. Tellus, 1992, 44(2): 81.
[9]
SAYER E J, POWERS J S, TANNER E V J. Increased litterfall in tropical forests boosts the transfer of soil CO2 to the atmosphere[J]. Plos One, 2007, 2(12): e1299.
[10]
FONTAINE S, BAROT S, BARRÉ P, et al.Stability of organic carbon in deep soil layers controlled by fresh carbon supply[J]. Nature, 2007, 450(7167): 277.
[11]
SAYER E J, TANNER E V J, CHEESMAN A W. Increased litterfall changes fine root distribution in a moist tropical forest[J]. Plant and Soil, 2006, 281(1): 5.
[12]
左强,何怀江,赵秀海. 改变碳源输入对蛟河红松阔叶混交林土壤呼吸的影响[J]. 应用与环境生物学报, 2015, 21(6): 1136. ZUO Qiang,HE Huaijiang,ZHAO XiuHai. Influence of carbon input changes on the soil respiration in a mixed broadleaved-Korean pine forest in western foothill of Changbai Mountain[J]. Chin J Appl Environ Biol, 2015, 21(6): 1136.
[13]
HANSON P J, EDWARDS N T, GARTEN C T, et al. Separating root and soil microbial contributions to soil respiration: A review of methods and observations[J]. Biogeochemistry, 2000, 48(1): 115.
[14]
高伟,叶功富,游水生,等. 沙质海岸带木麻黄林与天然林主要种群的生态位特征比较[J]. 生态与农村环境学报, 2011, 27(2): 35. GAO Wei,YE Gongfu,YOU Shuisheng,et al. Comparison between Casuarina equisetifolia forest and natural forest on sandy coast in niche characteristics[J]. Journal of Ecology and Rural Environment,2011, 27(2): 35.
[15]
游水生,叶功富,徐俊森,等. 福建东山岛海岸带潺槁树种群生命表分析[J]. 广西植物, 2009, 29(1): 96. YOU Shuisheng,YE Gongfu,XU Junsen,et al. Analysis of life table of Litsea glutinosa population on the coast in Dongshan Island[J].Guihaia,2009, 29(1): 96.
[16]
XIAO S S, YE G F, ZHANG L H, et al. Soil heterotrophic respiration in Casuarina equisetifolia plantation at different stand ages[J]. Journal of Forestry Research, 2009, 20(4): 301.
[17]
肖胜生,叶功富,董云社,等. 木麻黄沿海防护林土壤呼吸动态及其关键影响因子[J]. 中国环境科学, 2009, 29(5): 531. XIAO Shengsheng,YE Gongfu,DONG Yunshe,et al. Soil respiration dynamics and major controlling factors in a coastal protective forest[J]. China Environmental Science, 2009, 29(5): 531.
[18]
高伟,叶功富,卢昌义,等. 福建东山岛海岸带风水林数量分类与排序[J]. 中南林业科技大学学报, 2013, 33(8): 117. GAO Wei,YE Gongfu,LU Changyi,et al. Quantitative classification and sequence of Feng-shui forest in coastal zone of Dongshan island in Fujian[J]. Journal of Central South University of Forestry and Technology, 2013, 33(8): 117.
[19]
肖胜生,熊永,段剑,等. 基于组分区分的南方红壤丘陵土壤呼吸对植被类型转换的响应[J]. 农业工程学报, 2015, 31(14): 123. XIAO Shengsheng,XIONG Yong,DUAN Jian,et al. Responses of soil respiration to vegetation type conversion in south hilly red soil based on main components[J]. Transactions of the Chinese Society of Agricultural Engineering, 2015, 31(14): 123.
[20]
SULZMAN E W, BRANT J B, BOWDEN R D, et al. Contribution of aboveground litter, belowground litter, and rhizosphere respiration to total soil CO2 efflux in an old growth coniferous forest[J]. Biogeochemistry, 2005, 73(1): 231.
[21]
LEFF J W, WIEDER W R, TAYLOR P G, et al. Experimental litterfall manipulation drives large and rapid changes in soil carbon cycling in a wet tropical forest[J]. Global Change Biology, 2012, 18(9): 2969.
[22]
高强,马明睿,韩华,等. 去除和添加凋落物对木荷林土壤呼吸的短期影响[J]. 生态学杂志, 2015, 34(5): 1189. GAO Qiang,MA Mingrui,HAN Hua,et al.Short-term effects of aboveground litter exclusion and addition on soil respiration in a Schima superba forest in Zhejiang Province,Eastern China[J]. Chinese Journal of Ecology, 2015, 34(5): 1189.
[23]
WARDLE D A. A comparative assessment of factors which influence microbial biomass carbon and nitrogen levels in soil[J]. Biological Reviews, 2008, 67(3): 321.
[24]
ZAK D R, TILMAN D, PARMENTER R P, et al.Plant production and soil microorganisms in late-successional ecosystems: a continental-scale study[J]. Ecology, 1994, 75(8): 2333.
[25]
GARCA-OLIVA F, SVESHTAROVA B, OLIVA M, et al. Seasonal effects on soil organic carbon dynamics in a tropical deciduous forest ecosystem in western Mexico[J]. Journal of Tropical Ecology, 2003, 19(19): 179.
[26]
HOOKER T D, STARK J M. Soil C and N cycling in three semiarid vegetation types: response to an in situ pulse of plant detritus[J]. Soil Biology and Biochemistry, 2008, 40(10): 2678.
[27]
FENG Wenting, ZOU Xiaoming, SCHAEFER D. Above- and belowground carbon inputs affect seasonal variations of soil microbial biomass in a subtropical monsoon forest of southwest China[J]. Soil Biology and Biochemistry, 2009, 41(5): 978.
[28]
HART S C, SOLLINS P. Soil carbon and nitrogen pools and processes in an old-growth conifer forest 13 years after trenching[J]. Canadian Journal of Forest Research, 1998, 28(8): 1261.
[29]
LI Yiqing, XU Ming, SUN O J, et al. Effects of root and litter exclusion on soil CO2 efflux and microbial biomass in wet tropical forests[J]. Soil Biology and Biochemistry, 2004, 36(12): 2111.
[30]
BRANT J B, MYROLD D D, SULZMAN E W. Root controls on soil microbial community structure in forest soils[J]. Oecologia, 2006, 148(4): 650.
余再鹏,万晓华,胡振宏,等. 亚热带杉木和米老排人工林土壤呼吸对凋落物去除和交换的响应[J]. 生态学报, 2014, 34(10): 2529. YU Zaipeng,WAN Xiaohua,HU Zhenhong,et al. Contrasting responses of soil respiration to litter manipulation in subtropical Mytilaria laosensis and Cunninghamia lanceolata plantations[J]. Acta Ecologica Sinica, 2014, 34(10): 2529.
[33]
王光军,田大伦,闫文德,等. 改变凋落物输入对杉木人工林土壤呼吸的短期影响[J]. 植物生态学报, 2009, 33(4): 739. WANG Guangjun,TIAN Dalun,YAN Wende, et al. Effects of aboveground litter exclusion and addition on soil respiration in a Cunninghamia lanceolata plantation in China[J].Chinese Journal of Plant Ecology, 2009, 33(4): 739.
[34]
BOONE R D, NADELHOFFER K J, CANARY J D, et al. Root exert a strong influence on the temperature sensitivity of soil respiration. Nature[J]. Nature, 1998, 396(6711): 570.
[35]
PENG Shushi, PIAO Shilong, WANG Tao, et al.Temperature sensitivity of soil respiration in different ecosystems in China[J]. Soil Biology and Biochemistry, 2009, 41(5): 1008.
2017, Vol. 15 
