文章摘要
李巧玲, 阎欣, 吴秀芝, 王波, 刘任涛, 安慧.荒漠草原沙漠化对土壤无机碳和有机碳的影响[J].水土保持学报,2019,33(1):98~103,110
荒漠草原沙漠化对土壤无机碳和有机碳的影响
Effects of Desertification on Soil Organic Carbons and Soil Inorganic Carbons in Desert Grassland
投稿时间:2018-08-09  
DOI:10.13870/j.cnki.stbcxb.2019.01.017
中文关键词: 荒漠草原  土壤机碳  土壤有机碳密度  沙漠化
英文关键词: desert grassland  soil inorganic carbon  soil organic carbon density  desertification
基金项目:宁夏自然科学基金项目(NZ17004);宁夏回族自治区西部一流学科项目(NXYLXK2017B06)
作者单位E-mail
李巧玲1,2, 阎欣2, 吴秀芝2, 王波3, 刘任涛2, 安慧2 1. 宁夏大学农学院, 银川 750021

2. 宁夏大学西北土地退化与生态恢复省部共建国家重点实验室培育基地
, 西北退化生态系统恢复与重建教育部重点实验室, 银川 750021

3. 盐池县草原实验站
, 宁夏 盐池 751506 
anhui08@163.com 
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中文摘要:
      以空间代替时间的方法,通过对宁夏荒漠草原不同沙漠化阶段土壤有机碳(SOC)和机碳(SIC)的研究,探讨荒漠草原沙漠化对土壤SIC、SOC及不同粒径组分土壤SIC、SOC分布特征的影响。结果表明:(1)随着荒漠草原沙漠化程度的加剧,0-10 cm土层各粒径组分土壤SIC和SOC含量呈下降趋势。半固定沙地和流动沙地各粒径组分土壤SIC含量均表现为黏粉粒机碳(CSIC) > 细砂粒机碳(FIC) > 粗砂粒机碳(CIC),而SOC含量均表现为细砂粒有机碳(FOC) > 粗砂粒有机碳(COC) > 黏粉粒有机碳(CSOC)。(2)随着荒漠草原沙漠化程度的加剧,0-30 cm土层土壤机碳(SICD)、土壤有机碳(SOCD)和土壤总碳(STCD)密度均表现为荒漠草原 > 固定沙地 > 半固定沙地 > 流动沙地。固定沙地、半固定沙地和流动沙地土壤SOCD、SICD分别比荒漠草原降低了18.5%,57.7%,60.5%和6.7%,35.9%,47.0%。(3)0-10 cm土层各粒径组分土壤SOC和SIC含量、全土SOC含量与0-30 cm土层SOC和SIC均呈显著正相关关系,其中土壤粗砂粒有机碳和粗砂粒机碳对SOC影响最大,而土壤黏粉粒有机碳和黏粉粒机碳与全土SIC含量呈显著负相关关系。因此,沙漠化防治对于减少荒漠草原土壤碳损失极为重要。
英文摘要:
      In order to explore the influence mechanism of desertification on the soil organic carbon (SOC) and soil inorganic carbon (SIC), we studied the distribution characteristics of SOC and SIC in bulk soil and their different particle sizes by spatial method instead of time method during the desertification process of desert grassland in Yanchi County. The results showed that:(1) The SIC and SOC contents in 0-10cm soil layer declined with the increasing desertification of desert grassland. The rank of SIC and SOC contents in each particle size of semi-fixed dunes and mobile dunes were soil inorganic carbon of clay and silt (CSIC) > soil inorganic carbon of fine sand (FIC) > soil inorganic carbon of coarse sand (CIC), soil organic carbon of fine sand (FOC) > soil organic carbon of coarse sand (COC) > soil organic carbon of clay and silt (CSOC). (2) The rank of SOC, SIC and STC densities in 0-30 cm soil layer were desert grassland > fixed dunes > semi-fixed dunes > mobile dunes. Compared with desert grassland, SOC and SIC densities in fixed dunes, semi-fixed dunes and mobile dunes declined by 18.5%, 57.7%, 60.5% and 6.7%, 35.9%, 47.0% respectively. (3) The SOC and SIC contents in different particle size fractions of 0-10 cm soil layer and SOCD and SICD of 0-30 cm soil layer were significantly positively correlated with SOC and SIC contents in bulk soil, and CIC and COC had the greatest influence on SOC. The SIC in bulk soil were significantly negatively correlated to CSIC and CSOC. Therefore, desertification control is extremely important to reduce soil carbon loss in desert grassland.
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