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[1]康成芳 宫渊波** 车明轩 许蔓菁 吕 宸 刘 韩.川西高寒山地灌丛草甸不同海拔土壤碳矿化特征*[J].应用与环境生物学报,2019,25(04):1-10.[doi:10.19675/j.cnki.1006-687x.2018.12044]
 KANG Chengfang,GONG Yuanbo**,CHEN Mingxuan,et al.Mineralization characteristics of soil carbon of alpine shrub meadow at different elevations, western Sichuan*[J].Chinese Journal of Applied & Environmental Biology,2019,25(04):1-10.[doi:10.19675/j.cnki.1006-687x.2018.12044]
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川西高寒山地灌丛草甸不同海拔土壤碳矿化特征*()
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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04期
页码:
1-10
栏目:
研究论文
出版日期:
2019-07-30

文章信息/Info

Title:
Mineralization characteristics of soil carbon of alpine shrub meadow at different elevations, western Sichuan*
文章编号:
201812044
作者:
康成芳1 宫渊波1** 车明轩1 许蔓菁1 吕 宸1 刘 韩2
1四川农业大学林学院 温江 6111302四川省甘孜州林业科学研究所 康定 626001
Author(s):
KANG Chengfang1 GONG Yuanbo1** CHEN Mingxuan1 XU Manjing1 Lü Chen1 & LIU Han2
1 College of Forestry, Sichuan Agricultural University, Wenjiang Sichuan 611130 , China 2 Ganzi Institute of Forestry Research , Kangding Sichuan 626001, China
关键词:
高寒山地矿化过程灰化土土壤有机碳土壤活性碳
Keywords:
alpine mountain mineralization process podzolic soil soil organic carbon active carbon
DOI:
10.19675/j.cnki.1006-687x.2018.12044
摘要:
研究不同海拔土壤碳矿化特征对深入认识不同海拔高寒灌丛草甸土壤有机碳动态变化有重要作用。以折多山3800 m、4000 m、4200 m的半阴坡和半阳坡土壤为研究对象,采用野外调查与室内分析相结合的方法对不同海拔土壤碳矿化差异进行了探讨。结果表明:各海拔土壤有机碳矿化速率随着培养时间的推移逐渐降低且前21 d降低幅度明显高于后21 d,土壤有机碳矿化速率和累积碳矿化量在坡向上和土层中大体呈现出半阴坡高于半阳坡,0-20 cm土层高于20-40 cm土层且差异性显著(P < 0.05),但在海拔上没有一致变化规律。一级动态方程均能很好地拟合各海拔土壤累积矿化量,各海拔土壤潜在可矿化有机碳量(C0)、C0/SOC值均表现出半阴坡高于半阳坡,且都在3800 m灰化土达到最大,表明在相同的环境温度背景下,半阴坡土壤固碳能力低于半阳坡,且灰化土固碳能力最弱。各海拔土壤活性有机碳含量占总有机碳含量比例呈现出半阴坡大于半阳坡,说明与半阳坡相比半阴坡土壤有机碳质量更高。除3800 m灰化土以外,土壤有机碳、活性碳含量均表现0-20 cm土层高于20-40 cm土层且差异性显著(P < 0.05)。土壤碳矿化速率、累积矿化量与土壤有机碳、活性碳显著相关,且活性碳更能直接影响有机碳矿化。综上所述,高寒地区阴阳坡土壤有机碳矿化存在差异,阴坡有机碳矿化量高于阳坡。(图2表4参33)
Abstract:
Examining the variations of soil organic carbon mineralization at different altitudes is crucial for better understanding of soil organic carbon dynamics . We selected the alpine mountains of 3800m, 4000m, 4200m at the semi-shady slopes and the semi-sunny slopes in Zheduo Mountains as the research object, and discussed them with field investigation and indoor analysis methods to investigate the difference of carbon mineralization characteristics at different altitudes . The results show that: The SOC mineralization rate was decreased with the cultivation time at each altitude gradually and the first 21-day reduction was significantly higher than the last 21-day, There is no consistent change in SOC mineralization rate and cumulative SOC mineralization at altitude, but the semi-shady slope and the 0-20cm soil layer were significant higher than the semi-sunny slope and the 20-40cm soil layer (P<0.05). The dynamics of SOC mineralization could fitted by the first-order kinetics. The potential mineralizable organic carbon(C 0) and C0/SOC value were significantly higher at semi-shade slope, and reached maximum at 3800m, indicating that the carbon sequestration capacity of semi-shady slope soil was relatively lower than that of semi-sunny slope and the podzolic soil was weakest under same ambient temperature . The ratio of soil active organic carbon to total organic carbon were significantly higher at semi-shade slope, indicating that the soil organic carbon quality was higher. Except for 3800m podzolic soil, soil organic carbon and activated carbon showed that the 0 -20cm soil layer was significant higher than 20-40cm soil layer (P<0.05). Soil organic carbon was significantly correlated with soil activated carbon. Soil carbon mineralization rate and cumulative mineralization were significantly correlated with soil organic carbon and activated carbon, and activated carbon could directly affect organic carbon mineralization.

备注/Memo

备注/Memo:
收稿日期: 2018-12-20 接受日期 Accepted: 2019-01-14?
* 四川省科技厅重点课题(2015FZ0022)和四川省高校重点实验室建设项目资助?
**通讯作者(E-mail: gyb@sicau.edu.cn)
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更新日期/Last Update: 2019-01-24