首页关于本刊影响因子及获奖投稿须知订阅及广告专辑与专题学术会议绿色发表通道优秀论文 
说明:
此论文已被《生态学报》录用,现已优先出版,可查看文章PDF版本!
张珍明.喀斯特小流域土壤有机碳空间异质性及储量估算方法研究.生态学报,2017,(22).http://dx.doi.org/10.5846/stxb201609141863  
喀斯特小流域土壤有机碳空间异质性及储量估算方法研究
Study on spatial heterogeneity and reserve estimation of soil organic carbon in a small karst catchment
投稿时间:2016-09-14  修订日期:2017-06-16
DOI: 10.5846/stxb201609141863
关键词优化指标  影响因素  土壤有机碳储量  小流域  喀斯特
Key Wordsoptimization index  influence factor  soil organic carbon storage  small watershed  karst
基金项目国家重大科学研究计划项目(2013CB956702);百层次人才计划【黔科合人才(2015)4022 号】贵州省基础研究项目黔科合[J]字2014⁃ 2002⁃03
作者单位E-mail
张珍明 贵州大学林学院 zhang6653579@163.com 
摘要点击次数 124
全文下载次数 64
摘要:
为了准确估算土壤有机碳储量,利用网格法采集2755个土壤剖面,共计23536个土壤样品,研究了喀斯特小流域土壤有机碳含量分布特征,并以“土壤类型法”为基准,对土壤分布面积、石砾含量、岩石裸露率、土层厚度等指标进行修正,合理的优化了土壤有机碳储量计算公式,探索出一种专属于喀斯特地区土壤有机碳储量的估算方法,结果表明:不同土层深度和土壤类型下土壤有机碳含量存在明显差异,土壤有机碳含量随着土层深度的增加而逐渐减小,不同土属的有机碳含量减小的幅度有所差异,不同坡位和坡向的有机碳含量大小为:阳坡>阴坡,坡中上部>坡顶>坡中>坡中下坡>坡底,不同土地利用方式下土壤有机碳含量大小顺序为:林地>灌草地>旱地>水田;土壤有机碳含量与坡度、海拔、岩石裸露率均呈极显著正相关关系,与土层厚度、土壤容重呈显著负相关;喀斯特地区土壤异质性较大,不同修正指标对土壤有机碳储量估算的影响程度为:土壤厚度>岩石裸露率>石砾含量>土壤有机碳含量>土壤容重;通过修正后的计算公式估算出普定后寨河小流域表层20cm厚土壤有机碳密度区间为3.53~5.44kg.m2,平均值为:1.24 kg.m2,100cm以内土壤有机碳密度区间为4.44~14.50 kg.m2,平均值为12.12 kg.m2,土壤有机碳储量为5.39×105t。
Abstract:
According to grid-based sampling method, 2755 soil profiles consist of 23536 soil samples were sampled and analyzed to study the spatial distribution of soil organic carbon (SOC) in karst Basin in Guizhou Province. Also, the estimation method of SOC stock exclusively for Karst was explored after correcting the soil distribution area, Particle content, the rate of rocky exposedness, the soil thickness and optimizing the calculation formula. The results showed that there were obvious differences in the content of SOC at different soil depth and types. The content of SOC decreased with the increase of soil depth, but the decreasing degree was different in different soil genus. The content of SOC in shady slope was higher than that in sunny slope. The content of SOC at different slope position were the upper-middle, top, middle, lower-middle, and bottom part by descending order. The soil heterogeneity was large in Karst areas. The order of soil organic carbon content under different land use patterns: woodland > Shrub grassland > dry land > paddy field. Soil organic carbon content and slope, elevation, rock bare rate have a very significant positive correlation, and soil thickness, soil bulk density was significantly negative correlation. The space variability in Karst area was larger, the influences of different indicators for the soil organic carbon reserves estimation were being the soil thickness >the ate of rocky exposedness >Particle content>the content of soil organic carbon content > the soil bulk density. By revised formula to estimate, the soil organic carbon density of the surface 20cm soil in the small watershed of HouZhai river catchment in Pudin was 3.53~5.44 kg.m2, the average values was 1.24 kg.m2. The soil organic carbon density of the 100cm soil was 4.44~14.50 kg.m2, the average value of 12.12 kg.m2, the soil organic carbon storage was 5.39× 105T.
HTML 查看全文   查看/发表评论  下载PDF阅读器

您是本站第 65669383 位访问者

Copyright © 2005-2019   京ICP备06018880号
地址:北京海淀区双清路18号
  邮编:100085    电话:010-62941099
  E-mail : shengtaixuebao@rcees.ac.cn
本系统由北京勤云科技发展有限公司提供技术支持