文献类型：期刊文献

英文题名：Similar mineral-associated organic carbon formation but distinct efficiencies by powdered wollastonite addition between two soils

作者：Yan, Yongxue[1,2,3,4] Yin, Liming[1,3] Yan, Shaobin[1,3] Fang, Yunting[1,3] Wang, Ang[1,3] Zhu, Feifei[1,3] Bai, Yanfeng[5] Zhang, Zhenhua[2,4] Zhang, Weidong[1,3]

第一作者：Yan, Yongxue

通信作者：Zhang, WD[1]

机构：[1]Chinese Acad Sci, Inst Appl Ecol, CAS Key Lab Forest Ecol & Silviculture, Huitong Expt Stn Forest Ecol, 72 Wenhua Rd, Shenyang 110016, Peoples R China;[2]Hunan Agr Univ, Coll Resources, Changsha 410128, Hunan, Peoples R China;[3]Huitong Natl Res Stn Forest Ecosyst, Hunan Key Lab Struct & Ecosyst Serv Subtrop Forest, Huaihua 418307, Huitong, Peoples R China;[4]Yuelushan Lab, Hongqi Rd, Changsha 410128, Peoples R China;[5]Chinese Acad Forestry, Res Inst Forestry, Beijing 100091, Peoples R China

年份：2025

卷号：211

外文期刊名：SOIL BIOLOGY & BIOCHEMISTRY

收录：;EI(收录号：20253719168555);Scopus(收录号：2-s2.0-105015811952);WOS:【SCI-EXPANDED(收录号:WOS:001575020600001)】；

基金：This research was funded by the National Key Research and Devel-opment Program of China (2022YFF1303003) , the National Natural Science Foundation of China (U22A20612) , the Science and Technology Innovation Program of Hunan Province (2024RC4029) and Yuelushan Laboratory Talent Program (2024RC2049) .

语种：英文

外文关键词：Soil organic carbon stabilization; Mineral sorption; Microbial carbon use efficiency; In vivo turnover; Enhanced rock weathering

摘要：Recent studies showed that application of silicates powders (e.g., wollastonite) to soils can enhance soil organic carbon (SOC) sequestration. However, whether and how the formation of mineral-associated organic carbon (MAOC) is affected by this practice is largely unknown. Here, we added C-13-labeled glucose at a rate of 5 % SOC to a forest and a farmland soil with and without CaSiO3 powder (analytical grade) addition (5 % of oven-dried soil mass) in a 60-day incubation experiment. Microbial carbon use efficiency (CUE) and biomass turnover were measured using a(18)O labelling method. We found that C-13-mineral associated organic carbon (C-13-MAOC) was significantly increased by similar to 171 % in the forest soil, and by similar to 252 % in the farmland soil by CaSiO3 addition. CaSiO3 addition also significantly increased C-13-particulate organic carbon (C-13-POC) by 156 % in the farmland soil. As such, the forest soil had a higher percentage of C-13-MAOC formed relative to C-13-POC than the farmland soil. The increased C-13-MAOC in the forest soil is likely related to the increased microbial CUE (128.5 %) due to increased pH (3.5 units). Despite no significant increase in microbial CUE, CaSiO3 addition decreased glucose-derived CO2 in the farmland soil relative to the forest soil. These results suggest that more glucose may have been utilized in the anabolic pathway by microorganisms, leading to higher MAOC formation efficiency in the farmland soil than the forest soil. Overall, our results highlight that CaSiO3 addition can promote MAOC formation, but the efficiency may depend on soil type.