农业环境科学学报2025，Vol.44Issue(2)：461-470,10.DOI:10.11654/jaes.2024-0169
硅酸盐矿物对酸化土壤的调理及无机碳固定性能的影响
Soil conditioning and inorganic carbon accumulation in acidified soil by silicate rock
摘要
Abstract
The degradation of soil quality and loss of inorganic carbon caused by soil acidification in agricultural field attracts increasing attention recently.In this study,pot experiment was conducted with two types of acidic soil to evaluate the role of wollastonite,a typical silicate,in controlling acidification and aluminum toxicity,improving soil fertility,accumulating inorganic carbon,and enhancing crop growth.Results showed that wollastonite increased soil pH by 2.47-3.24 units,reduced the exchangeable aluminum in soil by 32.02%-54.52%,and promoted soil inorganic carbon accumulation to 0.40-1.26 mg·g-1 under the dosage of 50-200 g·kg-1.Initial soil pH imposed great impact on the weathering of wollastonite and the release of exchangeable calcium ions,which induced a 1.22-1.94 times higher accumulation of inorganic carbon in low pH(4.46)soil than that in high pH(5.40)soil.Further correlation analysis(R2=0.78,P=2.55×10-7)revealed that the carbon source for soil inorganic carbon formation mainly derived from the microbial respiration of soil organic carbon.Addition of wollastonite also enhanced plant growth by a maximum of 16.89%-32.08%of rice biomass(dry weight).This was mainly due to the ability of wollastonite in inhibiting acidification and the toxicity of aluminum,as well as the enrichment of nutrient element silicon.Wollastonite increased the available silicon content in soil by 6.57-13.49 times.关键词
硅灰石/酸化土壤/土壤调理/无机碳固定/作物长势Key words
wollastonite/acidified soil/soil conditioning/inorganic carbon accumulation/crop growth分类
农业科技引用本文复制引用
姜雯琪,徐从斌,孙天然..硅酸盐矿物对酸化土壤的调理及无机碳固定性能的影响[J].农业环境科学学报,2025,44(2):461-470,10.基金项目
中国科学院前瞻战略科技先导专项(A类专项)(XDA0440201) （A类专项）
中国博士后科学基金项目(2023M733680) Chinese Academy of Sciences Strategic Leading Science&Technology Program(XDA0440201) （2023M733680）
China Postdoctoral Science Foundation(2023M733680) （2023M733680）
