准噶尔盆地梭梭群落下土壤CO2释放规律及其影响因子的研究

摘要/Abstract

摘要： 采用开路式自动土壤碳通量测量系统（LI-8100）测定了准噶尔盆地荒漠梭梭群落生长季的土壤呼吸速率,并分析了温度和土壤水分对土壤呼吸的影响,结果表明:土壤CO2释放速率有明显的日变化和季节动态,日最大排放速率出现在13:00—15:00时,最小排放速率在8:00时。土壤CO2释放速率日变幅最大值为0.90 μmol·m-2·s-1、最小值为0.24 μmol·m-2·s-1、平均速率是(0.548±0.076)μmol·m-2·s-1;土壤呼吸作用在生长季中的动态呈单峰曲线,顺序为6月＞7月＞8月＞9月＞5月＞10月。相关性分析表明,土壤呼吸速率与气温、地表温度和5 cm、10 cm、15 cm、20 cm、25 cm、30 cm、35 cm、40 cm、50 cm层土壤温度呈极显著和显著正相关关系,土壤呼吸速率与地表温度间的线性关系为Y=0.017X+0.033,（R2=0.566, P<0.001）,并得出Q10值为1.65。土壤含水量与土壤呼吸速率间的相关性不显著。

关键词: 土壤呼吸速率, 荒漠生态系统, 梭梭群落, 温度, 土壤水分, Q10值

Abstract: Using a LI-8100 automated soil CO2 flux system we determined the rate of soil carbon dioxide emission in Haloxylon Ammodendron growing season (May—October) in the Junggar Basin, also evaluated the influence of temperature and soil moisture on soil respiration rate. The results indicated that: the CO2 emission rate had significant diurnal fluctuation and seasonal dynamics. The maximum rate of CO2 emission appeared at 13:00—15:00 and the minimum at 8:00. The maximum diurnal amplitude was 0.90 μmol·m-2·s-1, the minimum amplitude was 0.24 μmol·m-2·s-1. The rate of CO2 emission was different with changing of the phenological periods, following an order of June＞July＞August＞September＞May＞October, the mean soil respiration rate during the plant growing season was (0.548±0.076)μmol ·m-2·s-1. Correlation analysis showed that soil respiration rate significantly correlated with air temperature, soil surface temperature, 5 cm, 10 cm, 15 cm, 20 cm, 25 cm, 30 cm, 35 cm, 40 cm, and 50 cm depths. The relationship between soil respiration rate (Y) and soil surface temperature (X) could be described by the following linear regression equation: Y=0.017X+0.033, (R2=0.566, P<0.001), the calculated Q10 value based on the above equation was 1.65. Correlation analysis showed that soil respiration rate didnt correlate with soil moisture significantly.

Key words: soil respiration rate, desert ecosystem, Haloxylon Ammodendron community, temperature, soil moisture, Q10 value

张丽华;陈亚宁*;李卫红;赵锐锋. 准噶尔盆地梭梭群落下土壤CO2释放规律及其影响因子的研究[J]. 中国沙漠, 2007, 27(2): 266-272.

ZHANG Li-hua;CHEN Ya-nin;LI Wei-hong;ZHAO Rui-feng. Soil Carbon Dioxide Emission and Affecting Factors under Haloxylon Ammodendron Community in Junggar Basin[J]. JOURNAL OF DESERT RESEARCH, 2007, 27(2): 266-272.

参考文献

[1]Bolin B,Degens E T．The global biogeochemical carbon cycle [C]//The Global Carbon Cycle,SCOPE 13．Chichester:John Wiley and Sons,1979:1-56．
[2]Post W M．Organic carbon in soil and the global carbon cycle[C]//Heimann M.The Global Carbon Cycle,NATO ASI Series.Berlin,Heidelberg: Springer-Verlag,1993:277-302．
[3]Post W M．Soil carbon pools and world life zones[J]．Nature,1982,298:156-159．
[4]Fernandez I J．Soil carbon dioxide characteristics under different forest types and after harvest[J]．Soil Sci Soc Amer J,1993,57:1115-1121．
[5]崔骁勇,陈佐忠,阵四清.草地土壤呼吸研究进展[J]．生态学报,2001,21(2):316-325．
[6]Lloyd J,Taylor J A．On the temperature dependence of soil respiration[J]．Functional Ecology,1994,8:315-323．
[7]Winkler J P,Cherry R S,Schlesinger W H.The Q10 relationship of microbial respiration in a temperate forest soil [J]．Biochemistry,1996,28:1067-1072．
[8]黄承才,葛滢,常杰,等．中亚热带东部三种主要木本群落土壤呼吸的研究[J]．生态学报,1999,19(3):324-328．
[9]王涛．西部大开发中的沙漠化研究及其灾害防治[J]．中国沙漠,2000,20(4):345-348．
[10]周欢水,申建军,姜英,等．中国西部沙漠化的分布、动态及其对生态环境建设的影响[J]．中国沙漠,2002,22(2):112-1l7．
[11]吴建国,常学向．荒漠生态系统健康评价的探索[J]．中国沙漠,2005,25(4):604-611．
[12]肖洪浪,李福兴,龚家栋,等．中国沙漠和沙地的资源优势与农业发展[J]．中国沙漠,1999,19(3):199-205．
[13]张景光,王新平,李新荣,等．荒漠植物生活史对策研究进展与展望[J]．中国沙漠,2005,25(3):306-314．
[14]Conant R T,Klopatek J M,Klopatek C C．Environmental factors controlling soil respiration in three semiarid ecosysterms[J]．Soil Sci Soc Am J,2000,64:383-390．
[15]West N E,Stark J M,Johson D W,et al．Effects of climatic change on the edaphic features of arid and semiarid lands of western North America[J]．Arid Soil Res Rehab,1994,8:307-351．
[16]黄培佑．干旱区免灌植被及其恢复[M]．北京:科学出版社,2002:87．
[17]魏文寿,何清,刘明哲,等．准噶尔盆地的气候变化与荒漠环境研究[J]．中国沙漠,2003,23(2):101-105．
[18]魏文寿．古尔班通古特沙漠现代沙漠环境与气候变化[J]．中国沙漠,2000,20(2):178-184．
[19]新疆农业大学．克拉玛依干旱区生态农业开发项目——土壤详查报告[R]．1996.15．
[20]王梅,潘存德,楚光明,等．人工绿洲外围荒漠植被及其群落外貌特征[J]．干旱区地理,2005,28(1):107-112．
[21]黑姆斯,胡珀,霍顿．生物化学[M]．王镜岩,文重,等译.北京:科学出版社,2000:53-77．
[22]曲保中,朱炳林,周伟红．新大学化学[M]．北京:科学出版社,2000:311-337．
[23]李明峰,董云社,齐玉春．锡林河流域羊草群落春季CO2排放日变化特征分析[J]．中国草地,2003,25(3):9-14．
[24]Harris D G,Van bavel C H M．Root respiration of tobacco,corn,and cotton plants[J]．Agronomy Journal,1957,49:182-184．
[25]崔骁勇,王艳芬,杜占池．内蒙古典型草原主要植物群落土壤呼吸的初步研究[J]．草地学报,1999,7(3):245-250．
[26]杨晶,黄建辉,詹学明,等．农牧交错区不同植物群落土壤呼吸的日动态观测与测定方法比较[J]．植物生态学报,2004,28(3):318-325．
[27]沙丽清,郑征,唐建维,等．西双版纳热带季节雨林的土壤呼吸研究[J]．中国科学:D辑,2004,34(A02):167-174．
[25]Kucera C,Kirkham D．Soil respiration studies in tall grass prairie in Missouri[J]．Ecology,1971,52:912-915．
[26]李凌浩,王其兵,白永飞．锡林河流域羊草草原群落土壤呼吸及其影响因子的研究[J]．植物生态学报,2000,24(6):680-686．
[27]Tesarova M,Gloser J．Total CO2 output from alluvial soils with two types of grassland communities[J]．Pedobiologia,1976,16:364-372．
[28]Bridge B J,Mort J J,Hartigan R J．The formation of degraded areas in the dry savanna woodlands of northern Australia[J]．Australian Journal of Soil Research,1983,21:91-104．
[29]Dvidson E A,Verchot L V,Cattanio J H,et al．Effect of soil water content on soil respiration in forests and cattle pastures of eastern Amazonia[J]．Biochemistry,2000,18:53-69．
[30]陈全胜,李凌浩,韩兴国,等．水热条件对锡林河流域典型草原退化群落土壤呼吸的影响[J]．植物生态学报,2003,27(2):202-209．
[31]吴琴,曹广民,胡启武,等．矮嵩草草甸植被-土壤系统CO2的释放特征[J]．资源科学,2005,27(2):96-102．
[32]Raich J W,Schlesinger W H．The global carbon dioxide flux in soil respiration and its relationship to vegetation and climate[J]．Tellus,1992,44B:81-99．
[33]Luo Y,Wan S,Hui D,et al．Acclimatization of soil respiration to warming in a tall grass prairie[J]．Nature,2001,413:622-625．
[34]Gupta S R,Singh J S．Soil respiration in a tropical grassland[J]．Soil Biology and Biochemistry,1981,13:261-26．
[35]Mathes K,Schriefer．The soil respiration during secondary succession:influence of temperature and moisture[J]．Soil Biol Biochem,1985,17(2):205-211．
[36]黄培佑．新疆荒漠区几种旱生树种自然分布的制约因素研究[J]．干旱区资源与环境,1990,4(1):59-67．
[37]肖洪浪,李新荣,段争虎,等．流沙固定过程中土壤植被系统演变[J]．中国沙漠,2003,23(6):605-6l1．
[38]张志山,谭会娟,王新平,等．沙漠人工植被区土壤呼吸初探[J]．中国沙漠,2005,25(4):525-528．
[39]王新平,张志山,张景光,等．荒漠植被影响土壤水文过程研究述评[J]．中国沙漠,2005,25(2):176-181．