[1]花可可,王小国,朱波,等.紫色土旱坡地土壤异养呼吸速率及其温度敏感性[J].山地学报,2013,(05):548.
　HUA Keke,WANG Xiaoguo,ZHU Bo.Soil Heterotrophic Respiration Rate and Its Sensitivity to Temperature on Sloping Upland of Purple Soil[J].Mountain Research,2013,(05):548.
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紫色土旱坡地土壤异养呼吸速率及其温度敏感性()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2013年05期
页码:
548
栏目:
山地研究
出版日期:
2013-01-01

文章信息/Info

Title:
Soil Heterotrophic Respiration Rate and Its Sensitivity to Temperature on Sloping Upland of Purple Soil
作者:
花可可;王小国;朱波;
1.中国科学院水利部成都山地灾害与环境研究所，四川 成都 610041；
2.中国科学院山地表生过程与生态调控重点实验室，四川 成都 610041；
3.中国科学院大学资源与环境学院，北京 100039
Author(s):
HUA Keke;  WANG Xiaoguo;  ZHU Bo
1. Institute of Maintain Hazards and Environment, Chinese Academy of Science, Chengdu 610041, China;
2. Key Laboratory of Mountain Surface Process and Ecological Regulation, Chinese Academy of Science, Chengdu 610041, China; 3. College of Resources and Environment, University of Chinese Academy of Science, Beijing 100039, China
关键词:
土壤异养呼吸速率; 土壤温度; 土壤湿度; 旱坡地; 紫色土
Keywords:
soil heterotrophic respiration rate;  soil temperature;  soil moisture;  sloping upland;  purple soil
分类号:
S152,S155.2+5
文献标志码:
A
摘要:
为探讨紫色土旱坡地土壤异养呼吸速率特征,采用静态暗箱-气相色谱法于2010年12月至2011年10月观测了土壤异养呼吸日变化、季节性变化及土壤温度和湿度。结果表明:土壤异养呼吸速率日变化特征呈单峰型曲线,其最大值和最小值分别出现在16:00和08:00;土壤异养呼吸速率季节变化明显,冬季低,夏季高,最大值为654.2 mg CO2/(m2h),最低值为38.1 mg CO2/(m2h),平均值为325.2 mg CO2/(m2h),小麦季土壤异养呼吸CO2排放总量为307.9 g C/m2,玉米季为384.8 g C/m2,全年为692.7 g C/m2,玉米季土壤异养呼吸CO2排放总量显著高...
Abstract:
The research on soil heterotrophic respiration is greatly helpful to predict accurately the soil organic carbon balance of agriculture ecosystem. Experimental studies overwhelmingly focus on characters of soil respiration based on soil and plant system in agriculture ecosystem. However, relatively little information has focus on soil heterotrophic respiration, especially for sloping upland under traditional fertilizer practice. Hence, We conducted a research to monitor soil heterotrophic respiration diurnal, seasonal changes with closed chamberchromatographic technique and assessed the impacting factors of soil heterotrophic respiration rate on sloping upland of purple soil in Sichuan Basin at Yanting Agroecological Experimental Station of purple soil, CAS. Results showed that the diurnal pattern of soil heterotrophic respiration exhibited single peak trend, with the minimum value occurring around 08:00 hours (local time) and the maximum value around 16:00 hours. Soil heterotrophic respiration rates were higher in summer than in winter. The maximum and minimum for the rate were 6542 mg CO2/(m2/h) and 3813 mg CO2 //(m2/h) respectively, with the mean of 3252 mg CO2/(m2/h).The average soil heterotrophic respiration rates during the maize season was higher than the wheat season following the values of 4082 mgCO2/(m2/h) and 2129 mg CO2(m2/h) respectively. The cumulative CO2 emissions from soil heterotrophic respiration were 3079 gC/m2, 3848 gC/m2 for the wheat and maize growing seasons respectively. Furthermore, the seasonal soil heterotrophic respiration rates were significantly affected by soil temperature. With the change in the rate of flux for each 10°C increase in temperature (Q10) in wheat season were greater than in maize season, were 322 and 316 for soil 5 cm and 0 cm temperature in wheat season. In addition, when soil moisture was above 60%, there was a significant negative correlation between soil moisture and soil heterotrophic rate. In contrast，it was no longer had a significant impact on soil heterotrophic rate when soil moisture was above 60%. The results could provide a better understanding of soil organic carbon gaseous loss on sloping upland of purple soil.

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备注/Memo

备注/Memo:
收稿日期(Received date)：2013-03-17；改回日期(Accepted) : 2013-06-08。
基金项目（Foundation item）：中国科学院战略先导专项子课题“西南农田土壤固碳潜力与速率研究”(XDA05050506)。[Supported by the Strategic Priority Research Program" of the Chinese Academy of Sciences，Climate Change: Carbon Budget and Relevant Issues，Grant No. XDA05050506.]
作者简介（Biography）：花可可(1983-)，男，博士生，主要从事农田生态系统碳水循环研究。[Hua Keke(1983-), male, doctor candidate, major in research on soil organic carbon cycling in agricultural ecosystem.] E-mail：huakeke1220@126.com *通信作者(Corresponding author)：朱波(1966-)，男，博士，博士生导师，主要从事土壤与农业环境研究。[Zhu Bo(1966-), male, doctor, professor Ph D supervisor, major in research on soil and environment in agricultural ecosystem.] E-mail:bzhu@imde.ac.cn
更新日期/Last Update: 1900-01-01