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

机构：[1] Huitong Experimental Station of Forest Ecology, CAS Key Laboratory of Forest Ecology and Silviculture, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China; [2] College of Resources, Hunan Agricultural University, Hunan, Changsha, 410128, China; [3] Hunan Key Laboratory for Structure and Ecosystem Service of Subtropical Forest, Huitong National Research Station of Forest Ecosystem, Huitong, 418307, China; [4] Yuelushan Laboratory, Hongqi Road, Changsha, 410128, China; [5] Research Institute of Forestry, Chinese Academy of Forestry, Beijing, 100091, China

年份：2025

卷号：211

外文期刊名：Soil Biology and Biochemistry

收录：EI(收录号：20253719168555);Scopus(收录号：2-s2.0-105015811952)

语种：英文

外文关键词：Calcium compounds - Carbon sequestration - Efficiency - Farms - Forestry - Organic carbon - Silicate minerals - Soils - Stabilization - 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 13C-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 a18O labelling method. We found that 13C-mineral associated organic carbon (13C-MAOC) was significantly increased by ～ 171 % in the forest soil, and by ～ 252 % in the farmland soil by CaSiO3 addition. CaSiO3 addition also significantly increased 13C-particulate organic carbon (13C-POC) by 156 % in the farmland soil. As such, the forest soil had a higher percentage of 13C-MAOC formed relative to 13C-POC than the farmland soil. The increased 13C-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. ? 2025