摘要
土壤碳含量是反映土壤碳封存能力的关键因素之一,阐明生态脆弱地区生态修复措施对土壤碳含量的影响,有助于推动生态系统碳汇能力提升和碳达峰碳中和的实现。以内蒙古鄂尔多斯砒砂岩地区为例,选取单因子(油松纯林(Pt)、山杏纯林(As)、沙棘纯林(Hr))和双因子(水平沟油松(PdPt)、水平沟山杏(PdAs)、水平沟沙棘(PdHr))6种典型的生态修复措施,并以荒草地(CK)作为空白对照,探究不同生态修复措施对不同深度下土壤有机碳(soil organic carbon,SOC)、土壤无机碳(soil inorganic carbon,SIC)、土壤全碳(total carbon,TC)含量的影响。结果表明:(1)0~60 cm土层,双因子措施比单因子措施更能有效提高SOC、TC含量;相较于对照CK,双因子措施提高SOC含量25.34%~134.50%,提高TC含量8.03%~49.70%;相较单因子措施,双因子措施下SOC含量增加2.42%~30.74%,TC含量提高3.08%~15.27%。(2)0~40 cm土层,双因子措施SIC含量比CK低6.00%~17.54%,比单因子措施低7.43%~14.34%;而40~100 cm土层,双因子措施SIC含量比CK高2.06%~25.26%,比单因子措施高3.12%~21.76%。(3)不同生态修复措施未改变SOC、SIC、TC含量的垂直分布趋势;在0~40 cm土层,SOC与SIC呈显著负相关性,SOC含量随深度增加逐级下降(降幅84.29%~88.96%),SIC含量则随深度增加而升高(增幅16.53%~40.14%);土壤TC含量趋势则与SOC一致(降幅45.84%~58.83%)。
Soil carbon content is one of the key factors indicating soil carbon sequestration capacity.Elucidating the impact of ecological restoration measures on soil carbon content in ecologically fragile areas will help promote the enhancement of ecosystem carbon sequestration capacity and the achievement of peak carbon dioxide emissions as well as carbon neutrality.Taking the Pisha sandstone area,located in the Ordos region,Inner Mongolia as an example,six ecological restoration measures were selected from the typical single-factor measures(Pinus tabuliformis Carriere(Pt),Armeniaca sibirica(As),and Hippophae rhamnoides Linn(Hr)),and two-factor measures(Parallel ditch Pinus tabuliformis Carriere(PdPt),Parallel ditch Armeniaca sibirica(PdAs),and Parallel ditch Hippophae rhamnoides Linn(PdHr))in the region,with grassland(CK)as a blank control group to investigate the effect of different ecological restoration measures on the SOC,SIC and TC contents of the soil at different depths.The results show that:(1)Two-factor measures are more effective than single-factor measures in increasing SOC and TC content in 0~60 cm soils.The two-factor measures increased SOC content by 25.34%~134.50%and soil TC content by 8.03%~49.70%compared to CK.The SOC content increased by 2.42%~30.74%and the TC content increased by 3.08%~15.27%with the two-factor measures compared to the single-factor measures.(2)In the 0~40 cm soil layer,the SIC content of the two-factor measures were 6.00%~17.54%lower than that of CK and 7.43%~14.34%lower than that of the single-factor measures.In the 40~100 cm soil layer,the SIC content of the two-factor measures was 2.06%~25.26%higher than that of CK and 3.12%~21.76%higher than that of the single-factor measures.(3)Different ecological restoration measures didn't change the vertical distribution trend of SOC,SIC and TC contents.In 0~40 cm soils,there was a significant negative correlation between SOC and SIC,with SOC content decreasing with depth(84.29%~88.96%)and SIC increasing with depth(16.53%~40.14%).Soil TC co
作者
李学峰
饶良懿
马凯
LI Xuefeng;RAO Liangyi;MA Kai(School of Soil and Water Conservation,Beijing Forestry University,Beijing 100083,China;Key Laboratory of State Forestry Administration on Soil and Water Conservation,Beijing Forestry University,Beijing 100083,China)
出处
《陕西师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2022年第4期125-135,共11页
Journal of Shaanxi Normal University：Natural Science Edition
基金
国家重点研发计划课题(2017YFC0504503)。
关键词
生态修复措施
土壤碳含量
砒砂岩
内蒙古鄂尔多斯
ecological restoration measures
soil carbon content
Pisha sandstone
Erdos,Inner Mongolia
