帮助 关于我们

返回检索结果

江汉平原不同土地利用方式下土壤团聚体中有机碳的分布与积累特点
Organic Carbon Distribution and Storage of Soil Aggregates under Land Use Change in Jianghan Plain, Hubei Province

查看参考文献26篇

谭文峰 1   朱志锋 1   刘凡 1   胡荣桂 1   单世杰 2  
文摘 论文探讨了江汉平原果园、旱地、水田、水旱轮作等利用方式下土壤团聚体的组成、有机碳与活性有机碳的分布与积累特点.结果表明:供试土壤团聚体的组成均以2～20μm粒径为主,其次为＜2μm和20～50μm粒径,＜50μm粒径团聚体的含量占团聚体总量的80.8%～94.1%.不同利用方式下有机碳含量的峰值均出现在200～2 000μm团聚体中,且＞50μm粒径团聚体中有机碳的含量比＜50μm粒径的高;但69.8%～86.6%的有机碳分布在＜50μm粒径团聚体中,其中以2～20μm团聚体中有机碳所占的比例最大(35.2%～45.9%),细微团聚体固碳能力较强,而粗粒径团聚体中的有机碳对土地利用方式的变化较为敏感.土壤团聚体中的活性有机碳以2～20μm粒径的最低,＜2μm和20～50μm中有机碳的活性相差不大;不同粒径的团聚体中均为水耕利用方式下(水田和水旱轮作)土壤活性有机碳的含量比旱耕利用方式下(果园和旱地)的高,但随着土壤团聚体粒径的增加,由水耕利用方式下活性有机碳所占的比例较大逐渐过渡到以旱耕利用方式下活性有机碳的比例较大.由于供试样品中2～20μm团聚体中有机碳积累最大、固定的有机碳最多,可以考虑将2～20μm团聚体作为土壤固定有机碳的特征团聚体.这些结果可为我国区域土壤有机碳的循环提供科学数据.
其他语种文摘 Soil aggregates determine the fertility and productivity of soils, and possess the ability to protect soil organic carbon by physical entrapment. The land use change will affect the capacity of the soil to act as both a source and a sink of organic matter and nutrients. However, limited literature on soil organic carbon in aggregates with different sizes under land use change were reported. The objective of the present study was to elucidate aggregate composition, organic carbon (OC)distribution and storage of orchard soil, dryland soil, paddy soil, and dryland and paddy rotation soil from Jianghan plain. The results showed that the percentage of soil micro-aggregates in the following order:2-20μm, <2μm and 20~50μm. Soil micro-aggregates in <50μm size group occupied 80.8%-94.1% of the total soil micro-aggregates. The organic carbon contents under different land uses was the highest in 200-2000μm fractions of aggregates. Furthermore, OC contents in >50μm fraction were higher than those in <50μm fraction.However,69.8%-86.6% of the total organic carbon was mainly found in the aggregates with a size of <50μm. Especially, 35.2%-45.9% of the total organic carbon was concentrated in the aggregates with sizes of 2-20μm. So the fine micro-aggregates possessed the high ability of carbon sink, and the organic carbon content in coarse micro-aggregates responded easily to land use change. The content of active soil organic carbon in 2-20μm fraction of different aggregates was the lowest, and their differences between <2μm and 20-50μm was slight. The content of active soil organic carbon was higher in paddy field than that under dryland cultivation. It was proposed that 2-20μm fraction of aggregates was regarded as characteristic aggregates due to its high retention of soil organic carbon. These results will help to reveal the regional soil organic carbon sequestration.
来源 自然资源学报 ,2006,21(6):973-980 【核心库】
关键词 土壤 ; 团聚体 ; 有机碳 ; 土地利用 ; 江汉平原
地址

1. 华中农业大学, 农业部亚热带农业资源与环境重点开放实验室, 武汉, 430070  

2. 湖北潜江市后湖农场, 湖北, 潜江, 433115

语种 中文
文献类型 研究性论文
ISSN 1000-3037
学科 农业基础科学
基金 国家自然科学基金重点项目
文献收藏号 CSCD:2539715

参考文献 共 26 共2页

1.  陈恩凤. 土壤特征微团聚体的组成比例与肥力评价. 土壤学报,2001,38(1):49-53 CSCD被引 114 次    
2.  潘根兴. 中国土壤有机碳库量与农业土壤碳固定动态的若干问题. 地球科学进展,2003,18(4):609-618 CSCD被引 142 次    
3.  Arrouays D. Spatial analysis and modeling of topsoil carbon storage in temperate forest humic loamy soils of France. Soil Sci,1995,159(3):191-198 CSCD被引 32 次    
4.  Hontoria C. Relationship between soil organic carbon and site characteristics in Peninsular Spain. Soil Sci Soc Am J,1999,63:614-621 CSCD被引 52 次    
5.  Hassink J. Preservation of plant residues in soils differing in unsaturated protective capacity. Soil Sci Soc Am J,1996,60:487-491 CSCD被引 29 次    
6.  Percival H J. Factors controlling soil carbon levels in New Zealand grassland:Is clay content important?Soil Sci. Soc Am J,2000,64:1623-1630 CSCD被引 2 次    
7.  Puget P. Total and young organic matter distributions in aggregates of silty cultivated soils. Eur J Soil Sci,1995,46:449-459 CSCD被引 51 次    
8.  赵兰坡. 长期连作玉米的黑钙土、风沙土中有机-无机复合体组成及有机碳分布的特征. 土壤通报,1996,27(3):120-123 CSCD被引 17 次    
9.  李恋卿. 太湖地区几种水稻土的有机碳储存及其分布特性. 科技通报,2000,16(6):421-426 CSCD被引 32 次    
10.  Thuties L. Influences of organic fertilization and solarization in a greenhouse on particle-size fractions of a Mediterranean sandy soil. Biol Fertil Soils,2000,32:449-457 CSCD被引 1 次    
11.  袁颖红. 不同施肥处理对红壤性水稻土微团聚体有机碳汇的影响. 生态学报,2004,24(12):2961-2966 CSCD被引 55 次    
12.  张旭辉. 不同轮作制度对淮北白浆土团聚体及其有机碳的积累与分布的影响. 生态学杂志,2001,20(2):16-19 CSCD被引 50 次    
13.  李恋卿. 退化红壤植被恢复中表层土壤微团聚体及其有机碳的分布变化. 土壤通报,2000,31(5):193-195 CSCD被引 68 次    
14.  Beare M. Aggregate-protected and unprotected organic matter pools in conventional tillage and no-tillage soils. Soil Sci Soc Am J,1994,58:787-795 CSCD被引 44 次    
15.  Gregorich E G. Turnover of soil matter and storage of corn residue carbon estimated frorm natural 13C abundance. Can J Soil Sci,1995,75:161-167 CSCD被引 43 次    
16.  Barrios E. Light fraction soil organic matter and available nitrogen following trees and maize. Soil Sci Soc Am J,1997,61:826-831 CSCD被引 29 次    
17.  Buyanovsky G A. Carbon turnover in soil physical fractions. Soil Sci Soc Am J,1994,58:1167-1173 CSCD被引 28 次    
18.  Jerome AM. Natural 13C abundance as a tracer for studies of soil organic matter dynamics. Soil Biol Biochem,1987,19(1):25-30 CSCD被引 1 次    
19.  Leinweber P. Seasonal variation of soil organic matter in a long-term agricultural experiment. Plant Soil,1994,160:225-235 CSCD被引 2 次    
20.  李映强. 不同耕作制下水稻土有机物质变化及其团聚作用. 土壤学报,1991,28(4):404-409 CSCD被引 21 次    
引证文献 31 篇

1 毛艳玲 土地利用方式对土壤水稳性团聚体有机碳的影响 水土保持学报,2008,22(4):132-137
CSCD被引 39 次

2 潘根兴 土壤碳循环研究及中国稻田土壤固碳研究的进展与问题 土壤学报,2008,45(5):901-914
CSCD被引 104 次

显示所有31篇文献

论文科学数据集
PlumX Metrics
相关文献

 作者相关
 关键词相关
 参考文献相关

版权所有 ©2008 中国科学院文献情报中心 制作维护：中国科学院文献情报中心
地址：北京中关村北四环西路33号 邮政编码：100190 联系电话：(010)82627496 E-mail:cscd@mail.las.ac.cn 京ICP备05002861号-4 | 京公网安备11010802043238号