中国农业科学院农业信息研究所 中国农学会
Agricultural Information Institute of CAAS China Association of Agricultural Science Societies
En
Ch
中国农业科学院农业信息研究所 中国农学会 主办

AI检索

订阅

返回顶部
当前位置: 首页 > 文章 > 植被自然恢复过程中土壤有机碳密度与微生物量碳动态变化 水土保持学报 2010,24 (1) 229-232+238
Position: Home > Articles > Dynamic Change of Soil Organic Carbon Density and Microbial Biomass Carbon during Natural Revegetation Journal of Soil and Water Conservation 2010,24 (1) 229-232+238

植被自然恢复过程中土壤有机碳密度与微生物量碳动态变化

作  者：
郭曼;郑粉莉;安韶山;刘雨;安娟
单  位：
西北农林科技大学资源环境学院;中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室
关键词：
植被自然恢复;土壤有机碳密度;土壤微生物量碳;典型草原带;黄土丘陵区
摘  要：
以黄土丘陵区典型草原带宁夏固原地区为例,研究了退耕地在植被自然恢复过程中土壤有机碳密度及微生物量碳的动态变化。结果表明,植被自然恢复过程中,土壤有机碳(SOC)和微生物量碳(SMBC)表现为0-5cm土层>5-10cm土层>10-20cm土层,且在不同土层之间的差异性达到极显著水平(P<0.01)。SOC和SMBC在植被自然恢复过程中亦表现出一定的表聚性。土壤剖面各土层SOC和SMBC皆随植被恢复年限的增加总呈上升趋势,且与恢复年限之间呈极显著的对数函数关系。植被恢复0～23a期间,表层土壤(0-5cm)SOC和SMBC年增长率分别为4.81%和6.96%,增加幅度较大;植被恢复23～75a期间,表层土壤SOC和SMBC的年增长率均为0.25%,增加趋势减缓。土壤剖面各土层微生物熵(SMQ)变化于2.113～4.375。土壤有机碳周转速率在恢复前期(0～12a)较快,恢复后期(12～75a)趋于稳定,土壤有机碳积累与转化主要发生在土壤表层。SOC和SMBC之间有极显著的线性正相关关系。植被恢复0～23a期间,与对照农地相比,0-20cm土层土壤有机碳密度增加了85.23%,增加速率较快;而在植被恢复23～75a期间,有机碳密度仅增加了6.60%,增幅减缓。表明植被自然恢复有助于黄土丘陵区土壤有机碳储量的增加,促进土壤碳固定。
译  名：
Dynamic Change of Soil Organic Carbon Density and Microbial Biomass Carbon during Natural Revegetation
作  者：
GUO Man1,2,ZHENG Fen-li1,2,AN Shao-shan1,2,LIU Yu1,2,AN Juan2 (1.College of Resources and Environment,Northwest A&F University,Yangling,Shaanxi 712100;2.State Key Laboratory of Soil Erosion and Dryland Farming in Loess Plateau,Institute of Soil and Water Conservation,CAS & MWR,Yangling,Shaanxi 712100)
关键词：
natural revegetation; soil organic carbon density;microbial biomass carbon;typical grassland;loess hilly-gully area
摘  要：
Soil carbon density and soil microbial biomass carbon (SMBC) were studied based on the different chronosequence sites during the revegetation process on loess hilly-gully area in southern Ningxia. The results showed that soil organic carbon (SOC) and microbial biomass carbon in the soil profile were 0-5 cm soil layer>5-10 cm soil layer>10-20 cm soil layer. There were significant differences among layers of SOC and SMBC. During natural revegetation,the enrichment effects of SOC and SMBC in the soil surface were obvious. SOC and SMBC in each profile were logarithmically increased with vegetation restoration years. SOC and SMBC were greatly increased during 0~23 years of revegetation,but the change of SOC and SMBC were small during 23~75 years. In the 0-5 cm soil profile,SOC and SMBC increased 4.81% and 6.96% per year within 23 years respectively,but only 0.25% per year during 23 to 75 years. Soil microbial quotient (SMQ) changed in 2.113~4.375. The turnover rate of soil organic carbon within vegetation restoration of 12 years was faster than those 12 to 75 revegetation years,the accumulation of SOC was main in the surface. By correlation analysis,SOC was significantly positive correlated with SMBC (p<0.01),it can explain that SMQ was more suit to represent SMBC than SOC during natural revegetation. Compared with the farmland,soil organic carbon density (SOCD) increased 85.23% within 23 years,but only 6.60% during 23 to 75 years of revegetation. The result showed vegetation natural restoration can improve soil organic carbon reservation,and promote soil carbon fixation.

相似文章

导出引用
计量
文章访问数: 9
HTML全文浏览量: 0
PDF下载量: 0

所属期刊

推荐期刊

友情链接Friendly link
农业信息研究所Agricultural information institute 农业智能知识服务平台Agricultural intelligent knowledge service platform 农业学术服务平台Agricultural Knowledge Service System 中国知网CNKI 维普网VIP 万方WANFANG DATA
联系我们Contact us

电话Tell：010-82109652-808

邮箱E-mail：agrijournal@caas.cn

服务Service
关于我们About us 意见建议Opinions and suggest
版权说明Copyright
单位：中国农业科学院农业信息研究所 中国农学会 © 2017中国农业科学院农业信息研究所 ICP备案号：京ICP备09089781号-46