摘要
探究复垦土壤微生物量碳与基础呼吸的特征及其演变归因,有助于监测复垦土壤质量演变,并为提高复垦土壤质量提供科学依据。利用"空间代替时间"的方法研究了邹城东滩矿区复垦土壤微生物量碳(MBC)与基础呼吸(SBR)随复垦年垦的变化及其与土壤环境因子的关系。结果表明:复垦土壤MBC和微生物熵(q SMBC)随复垦年限呈增加趋势;复垦土壤SBR均显著高于对照,土壤代谢熵(q CO2)随复垦年限趋于降低,复垦后土壤微生物量逐渐恢复,同时土壤微生物对碳源利用效率逐渐提高,说明土壤环境逐渐有利于土壤微生物的生长。土壤MBC与碱解氮、总氮和有机碳呈极显著正相关(p<0.01),反映土壤养分缺乏是复垦后土壤微生物生长的主要限制因素。土壤代谢熵(q CO2)与土壤碱解氮、速效磷和MBC均呈极显著负相关(p<0.01)与p H呈显著正相关(p<0.05),说明氮磷等元素的缺乏以及较高的土壤p H环境是限制微生物生长的重要因素。这些对全面监测复垦后土壤质量的演变,并指导今后的复垦工作具有重要理论与实践意义。
The study on the characteristics of microbial biomass carbon and the evolution rules in reclaimed soil can be beneficial for the evolution monitoring of the reclaimed soil quality and can also provide a scientific basis for improving the reclaimed soil quality. In this work,the method of＂spatial sequence instead of time series＂was employed to study the changes of the microbial biomass carbon（ MBC） and the soil basic breathing（ SBR） with reclamation years of Dongtan coal mine in Zoucheng City,and the relationships of MBC and SBR to the soil environmental factors were also analyzed. The results suggest that： firstly,the MBC and q SMBC increased with reclamation years. Secondly,the SBR values of reclaimed soil were significantly higher than those of the control group,and the metabolic quotient（ q CO2） tended to decrease with reclamation years. Besides,the soil microbial biomass content recovered gradually after reclamation,and meanwhile,the carbon utilization efficiency of the soil microbial biomass increased gradually,which indicated that the soil environment became more suitable for the microbe growth. Thirdly,the soil MBC showed an obvious proportional relationship（ p 0. 01） to available nitrogen（ AN）,total nitrogen（ TN） and soil organic carbon（ SOC）,indicating that soil nutrient deficiency is the main limiting factor to soil microorganism growth after reclamation. On the other hand,the q CO2 was inversely proportional to AN,AP and MBC（ p 0. 01）,but was proportional to p H（ p 0. 05）,implying that the lack of nitrogen and phosphorus and a high soil p H environment had a negative effect on the growth of microbe. In sum,those results are of great theoretical and practical significance for the comprehensive evolution monitoring of soil quality and for the guidance of the reclamation work in the future.
作者
渠俊峰
葛梦玉
王坤
刘姝
候玉乐
张绍良
李钢
陈浮
Jun-feng;GE Meng-yu;WANG Kun;LIU Shu;HOU Yu-le;ZHANG Shao-liangI;LI Gang;CHEN Fu(School of Environment Science and Spatial Informatics,China University of Mining and Technology,Xuzhou 221116;Low Carbon Energy Institute,China University of Mining and Technology,Xuzhou 221008,China)
出处
《长江流域资源与环境》
CAS
CSSCI
CSCD
北大核心
2018年第8期1858-1865,共8页
Resources and Environment in the Yangtze Basin
基金
国家科技支撑计划项目(2015BAD06B02)
国家自然科学基金(51474214)
关键词
采煤塌陷区
土壤微生物量碳
土壤微生物熵
基础呼吸
coal-mining subsidence area
soil microbial biomass carbon
soil microbial quotient
soil basal respiration
