利用Li-840 CO2气体分析仪,测定并分析了哀牢山中山湿性阔叶林和具有30 a历史的茶园的土壤呼吸季节变化特征。结果发现:在干季,土壤呼吸速率表现为茶园显著大于阔叶林,而在湿季,茶园略小于阔叶林,从全年结果看茶园略大于阔叶林; 茶园的土壤温度和土壤含水量均显著大于阔叶林; 通过土壤温度和土壤水分的双因子模型,得到土壤温度和土壤水分对茶园和阔叶林的土壤呼吸变化解释率分别为49.6%和70.7%; 土壤呼吸的温度敏感性表现为茶园小于阔叶林; 茶园土壤有机质碳、氮量显著小于阔叶林,而在土壤质量密度、pH、磷和钾含量方面,则茶园显著大于阔叶林。
Abstract
By studying on soil respiration and its influence factors in a montane evergreen broad-leaved forest and a 30-year-old tea garden in Ailao Mountains, Yunnan, SW China. We obtained the following results as: in dry season, soil respiration was significantly greater in tea garden than that in evergreen broad-leaved forest. However, soil respiration in tea garden was slightly less than in evergreen broad-leaved forest in wet season; The total data in 2010 showed that soil respiration was slightly higher in tea garden than in evergreen broad-leaved forest during the whole year, soil temperature and soil water content of the tea garden was significantly greater than those in evergreen broad-leaved forest. the two-factor model analysis of soil temperature and soil water, showed that soil temperature and soil water were responsible for 49.6% and 70.7% of soil respiration variation in tea garden and in forest, respectively. The temperature sensitivity of soil respiration in the forest was significantly higher than that in tea garden. Soil organic carbon and nitrogen were significantly higher in forest than those in the tea garden; however, soil bulk density, pH value, phosphorus and potassium in the broad-leaved forest were less than those in the tea garden.
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] Fang J, Chen A, Peng C, et al. Changes in forest biomass carbon storage in China between 1949 and 1998[J]. Science, 2001, 292(5525): 2320-2322.
[2] Schlesinger W H. Biogeochemistry: An analysis of global change[M]. San Digo, California, USA: Academic Press, 1997.
[3] Dixon R K, Solomon A M, Brown S, et al. Carbon pools and flux of global forest ecosytems[J]. Science, 1994, 263(5144): 185-190.
[4] Lal R. Soil carbon sequestration impacts on global climate change and food security[J]. Science, 2004, 304(5677): 1623-1627.
[5] Friedlingstein P, Cox P, Betts R, et al. Climate-carbon cycle feedback analysis: Results from the(CMIP)-M-4 model intercomparison[J]. Journal of Climate, 2006, 19(14): 3337-3353.
[6] 周涛,史培军,王绍强.气候变化及人类活动对中国土壤有机碳储量的影响[J].地理学报,2003,58(5):727-734.
[7] Islam K R, Weil R R. Land use effects on soil quality in a tropical forest ecosystem of Bangladesh[J]. Agriculture Ecosystems & Environment, 2000, 79(1): 9-16.
[8] 吴征镒.云南哀牢山森林生态系统研究[M].昆明:云南科技出版社,1983.
[9] 冯文婷,邹晓明,沙丽清,等.哀牢山中山湿性常绿阔叶林土壤呼吸季节和昼夜变化特征及影响因子比较[J].植物生态学报,2008,32(1):31-39.
[10] Davidson E A, Janssens I A. Temperature sensitivity of soil carbon decomposition and feedbacks to climate change[J]. Nature, 2006, 440(7081):165-173.
[11] Liang N, Nakadai T, Hirano T, et al. In situ comparison of four approaches to estimating soil CO2 efflux in a northern larch(Larix kaempferi Sarg.)forest[J]. Agricultural and Forest Meteorology, 2004, 123(1-2): 97-117.
[12] Xu L K, Baldocchi D D, Tang J W. How soil moisture, rain pulses, and growth alter the response of ecosystem respiration to temperature[J]. Global Biogeochemical Cycles, 2004, 18(4):1-4.
[13] Tang J W, Baldocchi D D, Xu L K. Tree photosynthesis modulates soil respiration on a diurnal time scale[J]. Global Change Biology, 2005, 11(8): 1298-1304.
[14] Aggangan R T, O’Connell A M, McGrath J F, et al. The effects of Eucalyptus globulus Labill. leaf letter on C and N mineralization in soils from pasture and native forest[J]. Soil Biology & Biochemistry, 1999, 31(11): 1481-1487.
[15] 刘惠,赵平,林永标,等.华南丘陵区不同土地利用方式下土壤呼吸[J].生态学杂志,2007,26(12):2021-2027.
[16] 蒋延玲,周广胜,赵敏,等.长白山阔叶红松林生态系统土壤呼吸作用研究[J].植物生态学报,2005,29(3):411-414.
[17] 杨玉盛,陈光水,王小国,等.中国亚热带森林转换对土壤呼吸动态及通量的影响[J].生态学报,2005,25(7):1684-1690.
[18] 王小国,朱波,王艳强,等.不同土地利用方式下土壤呼吸及其温度敏感性[J].生态学报,2007,27(5):1960-1968.
[19] Trumbore S E, Harden J W. Accumulation and turnover of carbon in organic and mineral soils of the BOREAS northern study area[J]. Journal of Geophysical Research-Atmospheres, 1997, 102(D24): 28817-28830.
[20] Bekku Y S, Nakatsubo T, Kume A, et al. Effect of warming on the temperature dependence of soil, respiration rate in arctic, temperate and tropical soils[J]. Applied Soil Ecology, 2003, 22(3): 205-210.
[21] Lipson D A. Relationships between temperature responses and bacterial community structure along seasonal and altitudinal gradients[J]. Fems Microbiology Ecology, 2007, 59(2): 418-427.
[22] 张增信,施政,何容,等.北亚热带次生栎林和人工松林土壤呼吸日变化[J].南京林业大学学报:自然科学版,2010,34(1):19-23.
[23] Janssens I A, Dore S, Epron D, et al. Climatic influences on seasonal and spatial differences in soil CO2 efflux, in fluxes of carbon, water and energy of European forests[M]. Berlin: Springer-Verlag, 2003.
[24] Curiel Yuste J, Janssens I A, Carrara A, et al. Annual Q10 of soil respiration reflects plant phenological patterns as well as temperature sensitivity[J]. Global Change Biology, 2004, 10(2): 161-169.
基金
收稿日期:2011-02-17 修回日期:2011-08-29 基金项目:国家重点基础研究发展计划(2010CB833501); 中国科学院知识创新工程重要方向项目(KZCX2-YW-Q1-05-04) 第一作者:武传胜,硕士。*通信作者:沙丽清,副研究员。E-mail:shalq@xtbg.ac.cn。引文格式:武传胜,沙丽清,高建梅,等. 哀牢山中山湿性常绿阔叶林与人工茶园土壤呼吸的季节变化[J]. 南京林业大学学报:自然科学版,2012,36(3):64-68.
PDF(930622 KB)
