引用本文:代豫杰,李锦荣,郭建英,韩秀峰,张梦璇,周晓莹,董智,等.乌兰布和沙漠不同灌丛土壤颗粒多重分形特征及其与有机碳分布的关系[J].环境科学研究,2017,30(7):1069-1078.
DAI Yujie,LI Jinrong,GUO Jianying,HAN Xiufeng,ZHANG Mengxuan,ZHOU Xiaoying,DONG Zhi,et al.Soil Particle Multi-Fractals and Soil Organic Carbon Distributions and Correlations under Different Shrubs in Ulan Buh Desert[J].Reserrch of Environmental Science,2017,30(7):1069-1078.]
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 232次   下载 345 本文二维码信息
码上扫一扫!
分享到: 微信 更多
乌兰布和沙漠不同灌丛土壤颗粒多重分形特征及其与有机碳分布的关系
代豫杰1, 李锦荣2, 郭建英2, 韩秀峰1, 张梦璇1, 周晓莹1, 董 智1
1.山东农业大学林学院, 山东省土壤侵蚀与生态修复重点实验室, 泰山森林生态站, 山东 泰安 271018 ;2.水利部牧区水利科学研究所, 内蒙古 呼和浩特 010020
摘要:
w(SOC)(SOC为土壤有机碳,soil organic carbon)及其分布状况显著受到土壤PSD(particle-size distribution, 粒径分布)和有机质相互胶结方式的差异影响,而w(SOC)可反映土壤结构优劣程度,表征土壤肥力状况及碳库饱和度. 以乌兰布和沙漠沙冬青、花棒、猫头刺、白刺和梭梭灌丛下0~100 cm深度风沙土为研究对象,通过野外分层采样与室内测试,采用多重分形理论探讨土壤特性和w(SOC)分布特征及其相互关系,反映土壤结构及肥力状况. 结果表明:①不同灌丛下的土壤均具有良好的分形特征,并且灌丛可通过降低风速,使≤50 μm的优质颗粒在周围表层土壤沉降,而优质颗粒数量与w(SOC)、D0(粒径分布范围)及D1(分布均匀程度)极显著正相关(P<0.01),与D1/D0(分布离散程度)极显著负相关(P<0.01);②各灌丛下w(SOC)的大小关系与D1、D0相似但与D1/D0完全相反,即w(SOC)可表征PSD状况进而反映土壤结构优劣程度,并且在沙冬青灌丛的>20~30、>60~80 cm土层出现两次峰值,分别为11.958、11.928 g/kg;③对D0的扩大及D1/D0的降低程度以沙冬青灌丛最为明显,但对D1的降低程度则以花棒灌丛最为明显. 研究显示,多重分形理论可很好地描述乌兰布和沙漠风沙土性质,并且适生灌丛中沙冬青及花棒可更好地改善土壤颗粒及SOC特征,故可通过种植二者局部改良土壤及增加碳库饱和度.
关键词:  灌丛  多重分形维数  土壤粒径分布  土壤有机碳  乌兰布和沙漠
DOI:
分类号:
基金项目:国家自然科学基金项目(41301303);水利部公益性行业科研专项经费(201401084);中国水科院科研专项项目(MK2016J03)
Soil Particle Multi-Fractals and Soil Organic Carbon Distributions and Correlations under Different Shrubs in Ulan Buh Desert
DAI Yujie1, LI Jinrong2, GUO Jianying2, HAN Xiufeng1, ZHANG Mengxuan1, ZHOU Xiaoying1, DONG Zhi1
1.Shandong Provincial Key Laboratory of Soil Erosion and Ecological Restoration, Taishan Forestry Ecosystem Research Station, College of Forestry, Shandong Agricultural University, Tai′an 271018, China ;2.Institute of Water Resources for Pastoral Area of the Ministry of Water Resources of China, Hohhot 010020, China
Abstract:
Abstract: Particle-size distribution (PSD) and contents of soil organic carbon (SOC) are regarded as soil fundamental characteristics, since SOC contents and distribution conditions can reflect the virtues or degree of defects of soil structure and soil fertile status. Multi-fractal theory has been widely used to evaluate PSDs, soil quality and SOC characteristics. Contents of SOC and distributions are significantly impacted by various methods of combination between soil particles and soil organic matters of different PSD. Therefore, we dug depths of 0-100 cm (0-10,>10-20,>20-30,>30-40,>40-60,>60-80,>80-100 cm) aoelian sandy soil profiles under Ammopiptanthus mongolicus, Hedysarum scoparium, Oxytropis aciphylla, Nitraria tangutorum and Haloxylon ammodendron shrubs coverage separately in Ulan Buh Desert, and from those as samples measured PSDs character and SOC contents and the distribution using multi-fractal theory, in order to analyze their correlations to give expression to soil structure and fertile status. The results showed that:(1) Soil under various shrubs all well reflected multi-fractal character; shrubs could decrease wind velocity to deposit fine particles which were ≤50 μm and supplement plasma materials carried by wind erosion. These resulted in positive significant correlation with w(SOC) and range of PSD, homogeneous degree of PSD (P<0.01) and negative significant correlation with dispersion degree of PSD (P<0.01). (2) Orders of w(SOC) under different shrubs were similar with D1 and D0, but totally opposite to D1/D0; w(SOC) could reflect PSDs status to illustrate virtues or defect degree of soil. w(SOC) showed double summit values under A. mongolicus at 20-30 and 60-80 cm soil layer, which were 11.958 and 11.928 g/kg. (3) A. mongolicus could enlarge D0 but decrease D1/D0 significantly, and H. scoparium could decrease D1 significantly, so H. scoparium and A. mongolicus could promote PSD status more significantly to raise w(SOC). The results showed that multi-fractal theory can describe aeolian sandy soil property in Ulan Buh Desert appropriately, and A. mongolicus and H. scoparium included in suited shrubs of local environment can improve soil particle status and promote soil quality in partial desert area and increase saturation of carbon pool.
Key words:  shrubs  multi-fractal  soil particle distribution  soil organic carbon  Ulan Buh Desert