Accumulation characteristics of organic carbon in kaolin-based artificial biological crusts
Due to the scarcity of biological resources,desert areas are unable to achieve long-term carbon sequestration.Biological crust is a pioneer organism in desert areas and plays an important role in long-term carbon sequestration.However,the development of natural biological crust is slow.Clay plays an important role in the formation and development of biological crusts,and has a strong protective effect on soil organic carbon.Therefore,this paper explores the impact and mechanism of adding kaolin on the organic carbon of soil biological crust system,aiming to provide new solutions for the long-term carbon sink in desert areas.Through testing particle size,specific surface area and pore volume,chlorophyll a,chlorophyll fluorescence,microbial community,and soil organic carbon(SOC),it has been found that the addition of kaolin changed the physicochemical properties and microbial community structure of the system,promoted the growth of biochar,and strengthened the protective effect of the system on SOC.After 112 days of cultivation,the results show that the accumulation of SOC in the kaolin-based biological crust system increases to 145％of the algae inoculation group.
kaolinbiocrustsoil organic carbonchlorophyll fluorescence parametersmicrobial community
NETL
NSTL
万方数据
