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[1]袁瑱 周志勇** 赵洪涛 史佳伟 张欢.太岳山森林土壤有机碳矿化随温度、湿度和培养时间的变化特征*[J].应用与环境生物学报,2019,25(06):1-15.[doi:10.19675/j.cnki.1006-687x.2019.01012]
 YUAN Zhen,ZHOU Zhiyong**,ZHAO Hongtao,et al.Variability of SOC mineralization by the incubation temperature, moisture and the period of time for forest ecosystems of Taiyue mountain*[J].Chinese Journal of Applied & Environmental Biology,2019,25(06):1-15.[doi:10.19675/j.cnki.1006-687x.2019.01012]
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太岳山森林土壤有机碳矿化随温度、湿度和培养时间的变化特征*()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
25卷
期数:
2019年06期
页码:
1-15
栏目:
研究论文
出版日期:
2019-12-30

文章信息/Info

Title:
Variability of SOC mineralization by the incubation temperature, moisture and the period of time for forest ecosystems of Taiyue mountain*
作者:
袁瑱1?周志勇1**?赵洪涛2?史佳伟1?张欢1
1北京林业大学林学院 北京 100083
2北京自然博物馆 北京 100050
Author(s):
YUAN Zhen1;? ZHOU Zhiyong1**;? ZHAO Hongtao2;?SHI Jiawei1&ZHANG Huan1
1College of Forestry, Beijing Forestry University , Beijing 100083, China
2Beijing Museum of Natural History, Beijing 100050, China
关键词:
养周期;?土壤湿度;?土壤温度;?土壤有机碳矿化;?温度敏感性
Keywords:
incubation period;? soil moisture content;? soil temperature;? soil organic carbon mineralization;? temperature sensitivity
DOI:
10.19675/j.cnki.1006-687x.2019.01012
摘要:
温度和湿度是驱动土壤有机碳矿化的主要环境因子,其驱动作用又会随着培养时间而发生改变。以山西太岳山地区的3种森林类型:油松林(PinustabulaeformisCarrière,PF)、辽东栎林(Quercuswutaishansea Mary ,QF)、油松辽东栎混交林(MF)为研究对象,把其土壤放在水分含量为30%、60%、90%和温度为5℃、10 ℃、20 ℃、30 ℃的水热条件下进行培养,用CO2自动测量系统按照不同的时间间隔测定土壤有机碳矿化速率,整个矿化周期为387 d 。结果显示,土壤有机碳累积矿化量以辽东栎林的相对较高,最高值出现在20℃和90%水热条件下培养的辽东栎林,为18.58 μg C·g soil -1,最低值出现在30℃和30%含水量的油松林,为3.95μg C·g soil-1。在前75天培养时间内,累积碳矿化量随着水热梯度的提高而增加,而在从180-387 d 的培养期内,累积碳矿化量则随着温度的升高而降低。温度对瞬时矿化速率的影响也随着培养时间呈现出了类似的变化规律。土壤有机碳矿化的温度敏感性以辽东栎林土壤在5℃和90%湿度培养时最高,为2.35;以在20℃和湿度60%培养的混交林土壤最低,为0.58。温度敏感系数值(Q10)随着培养时间的延长和温度梯度的增加呈现下降的趋势。总之,在太岳山地区,同样的培养条件下,以辽东栎林的土壤碳矿化量最高;在培养前期,水热互作对土壤有机碳矿化有正的驱动作用,而在培养后期,温度对土壤有机碳矿化的调控作用明显减弱。
Abstract:
Temperature and moisture content are two important environmental variables controlling soil organic carbon (SOC) mineralization, but their role also changes with the incubation time increasing. Three types of forest, i.e., Pinustabulaeformis (PF), Quercuswutaishansea (QF), and the mixed forest of P. tabulaeformis and Q. wutaishansea, were selected in our study to study the SOC mineralization. The soil samples were incubated under twelve incubation conditions with three soil moisture contents (SMC) of 30%, 60%, 90% and four temperature gradients of 5 ℃, 10 ℃, 20 ℃, 30 ℃ for a time period of 387 days. The instantaneous rate of SOC mineralization was automatically monitored using a CO 2 measurement system at different temporal intervals. The study results indicated that: QF had the highest amount of the cumulative mineralized carbon at 18.58μg C·g soil-1 incubated under 20 ℃ and 90% SMC, and PF had the lowest value at 3.95μg C·g soil-1 under 30 ℃ and 30% SMC. The amount of cumulative mineralized SOC increased with the incubation temperature and moisture content increasing during the first 75 days, but during the 180th day and 387 th day, temperature decreased the amount of cumulative mineralized SOC. Similar changing trend in the instantaneous rate of SOC mineralization was also observed with incubation temperature and time changing. The SOC mineralization responded more sensitively to the variation of incubation temperature for the soil of QF. The temperature sensitivity (Q10) was highest at 2.35 for QFsoil underthe incubation conditionwith the temperature range of 5℃ and 90% SMC , and was lowest at 0.58 for MF incubated with the temperature range of20℃ and 60% SMC. In general, under the similar incubation conditions, QF had a comparatively higher value of SOC mineralization than PF and MF. During the prior incubation period, temperature and moisture interacted positively to accelerate the SOC mineralization, however, a lower amount of SOC mineralization was detected for soil samples incubated at 30 ℃ during late incubation period.

相似文献/References:

[1]刘保新,汪金松,康峰峰,等.太岳山油松人工林土壤呼吸对抚育强度的响应[J].应用与环境生物学报,2012,18(01):17.[doi:DOI: 10.3724/SP.J.1145.2012.00017]
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备注/Memo

备注/Memo:
收稿日期 Received: 2019-01-07 接受日期 Accepted: 2019-04-05
*“十三五”国家重点研发计划课题“经营措施对人工林地力的影响机制”(2016YFD0600205)、北京林业大学青年教师科学研究中长期项目(2015ZCQ-LX-03)、林业科技创新平台运行补助项目(2018-LYPT-DW-153,2017-LYPT-DW-148)资助
**通讯作者 Corresponding author (E-mail: zhiyong@bjfu.edu.cn)
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更新日期/Last Update: 2019-04-15