林业科学2024，Vol.60Issue(2)：32-41,10.DOI:10.11707/j.1001-7488.LYKX20230253
外源钙添加对有机物料改良滨海盐碱土固碳潜力的影响
Effects of Exogenous Calcium Addition on Soil Carbon Sequestration Potential of Organic Amendments in Improving Coastal Saline-Alkali Soil
摘要
Abstract
[Objective]This study aims to investigate the effects of exogenous calcium addition on soil CO2 emission and soil carbon pool of organic amendment in improving coastal saline-alkali soil,so as to provide the theoretical basis for the improvement and utilization of coastal saline-alkali soil and the enhancement of carbon sequestration potential.[Method]In an indoor incubation experiment,the corn straw biochar + chicken manure(BM),and rice straw + chicken manure(SM)were respectively applied to the coastal saline-alkali soil.Calcium hydroxide and calcium silicate were used as calcium sources.Six treatments were established according to the principle of equal calcium content:no exogenous calcium application(CK),12.4 g·kg-1 calcium silicate application(Ca1),24.8 g·kg−1 calcium silicate application(Ca2),7.9 g·kg−1 calcium hydroxide application(Ca3),15.8 g·kg−1 calcium hydroxide application(Ca4),12.4 g·kg−1 calcium silicate and 7.9 g·kg−1 calcium hydroxide application(Ca5).All the calcium concentrations were added to the soil,and the incubation experiment lasted for one month.[Result]The results showed that the addition of exogenous calcium significantly reduced cumulative CO2 emission during the incubation period.The application of organic amendments led to the loss of SOC(soil organic carbon),while exogenous calcium addition did not significantly affect SOC mineralization but significantly increased SIC(soil inorganic carbon)content,thereby compensating for the loss of SOC and increasing the total carbon content in the soil,achieving the goal of soil carbon sequestration.Proper increase in the amount of calcium hydroxide was able to promote carbon sequestration.The emission reduction was mainly achieved by increasing the absorption of CO2 produced during mineralization and converting it into the form of calcium carbonate for fixation.[Conclusion]The above results indicate that the combination of organic amendments with calcium silicate and calcium hydroxide can effectively achieve soil carbon sequestration and emission reduction during the improvement of saline-alkali soil.关键词
滨海盐碱土/二氧化碳/土壤固碳/土壤无机碳Key words
saline-alkali soil/CO2/soil carbon sequestration/soil inorganic carbon分类
农业科技引用本文复制引用
史文竹,孙禧,邵旭升,热由索姆,王艮梅,张焕朝,项剑..外源钙添加对有机物料改良滨海盐碱土固碳潜力的影响[J].林业科学,2024,60(2):32-41,10.基金项目
江苏省 2022 年度碳达峰碳中和科技专项资金项目(BE2022305) （BE2022305）
国家自然科学青年科学基金项目(41801073) （41801073）
中国博士后科学基金面上项目(2020M671508) （2020M671508）
南京林业大学大学生创新创业训练计划项目. （）
