[1]贾国梅,何立,刘潇,等.三峡库区消落带土壤有机碳氧化稳定性特征[J].水土保持研究,2016,23(05):14-19.
　JIA Guomei,HE Li,LIU Xiao,et al.Characteristics of Soil Oxidizable Stable Organic Carbon in Riparian of Three Gorges Reservoir Area[J].Research of Soil and Water Conservation,2016,23(05):14-19.
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三峡库区消落带土壤有机碳氧化稳定性特征

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 23 期数: 2016年05期 页码: 14-19 栏目: 出版日期: 2016-10-28
Title:
Characteristics of Soil Oxidizable Stable Organic Carbon in Riparian of Three Gorges Reservoir Area
作者:
贾国梅1,2, 何立1, 刘潇3, 但飞君1, 陈芳清1,2
1. 三峡大学 生物与制药学院, 湖北 宜昌 443002;
2. 三峡大学 三峡地区生态保护与治理国际联合研究中心, 湖北 宜昌 443002;
3. Department of Chemistry, Stony Brook University, New York 11794, United States
Author(s):
JIA Guomei1,2, HE Li1, LIU Xiao3, DAN Feijun1, CHEN Fangqing1,2
1. College of Biological and Pharmaceutical Sciences, Three Gorges Univiersity, Yichang, Hubei 443002, China;
2. Hubei International Scientific and Technological Cooperation Center of Ecological Conservation and Management in Three Gorges Area, Three Gorges Univiersity, Yichang, Hubei 443002, China;
3. Department of Chemistry, Stony Brook University, New York 11794, USA
关键词:
三峡库区消落带; 土壤有机碳; 氧化难易组分; 活性系数
Keywords:
riparian of Three Gorges Reservoir Area; organic carbon; oxidizable fractions; liability index
分类号:
S153.6+21
摘要:
土壤有机碳氧化的难易对土壤质量和碳沉降具有显著的影响。选取三峡库区消落带的3个海拔梯度的土壤，以从未淹没的样地作为对照，研究消落带湿地不同海拔梯度土壤有机碳氧化难易各组分（F1：高氧化活性有机碳组分；F2：中氧化活性有机碳组分；F3：低氧化活性有机碳组分；F4：难氧化有机碳组分）的特征。结果表明：土壤F1组分含量和其所占有机碳的比例在所有样地的各组分中最高。土壤易氧化有机碳总量及其F2，F3和F4组分都是消落带区域小于从未淹没的对照样地，但是高氧化有机碳组分F1在海拔155～165 m的消落带区域与从未淹没的对照样地之间并无显著的差异。在消落带区域，155～165 m区域土壤易氧化有机碳及其F1组分显著大于144～155 m及其165～175 m区域的，而F2，F3和F4组分之间都无显著性差异。相关性分析表明，土壤易氧化有机碳及其氧化有机碳组分与土壤总有机碳之间都具有显著的正相关性，而氧化有机碳F3和F4组分只与土壤全氮之间具有显著的正相关性。消落带土壤易氧化碳活性系数的大小顺序为是155～165 m > 145～165 m > 165～175 m，这意味着消落带土壤有机碳不稳定性高低的顺序为155～165 m > 145～165 m > 165～175 m。
Abstract:
The different oxidizability of soil organic carbon influcences soil quality and carbon. The objective of this study was to determine the change in soil oxidizable organic carbon fractions (F1, F2, F3, F4) at different elevation gradients in riparian wetland of Three Gorges Reservoir Area. The results showed that oxidizable organic carbon fraction F1 and F1/TOC (total organic carbon) were the highest among the sample sites. Although readily oxidizable carbon and F2, F3, and F4 in riparian zone were lower than those in the control upland, F1 had no significant difference between the sites of 155～165 m and the control upland. In riparian zone, readily oxidizable carbon and F1 were higher in the sites of 155～165 m than those in the other sites, whereas there was no significant difference for F2, F3, and F4 among sites. Soil readily oxidizable carbon and oxidizable organic carbon fractions showed the significantly positive relationship with soil total organic carbon, whereas F3 and F4 showed the significant positive relationship with total nitrogen. Liability index followed the order: 155～165 m > 145～165 m > 165～175 m, indicating that the lability of carbon followed the same order in riparian zone of Three Gorges Reservoir Area.

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备注/Memo

收稿日期:2016-03-06;改回日期:2016-03-21。
基金项目:国家自然科学基金应急管理项目“消落带土壤甲烷氧化菌群落的生态位分异特征及其对水位消涨的响应机理”（51541903）
作者简介:贾国梅(1965-),女,甘肃永登人,博士,教授,主要从事土壤生态学研究。E-mail:jjjgm@126.com

更新日期/Last Update: 1900-01-01