外源硅酸钙对棕壤基础呼吸和碳酸钙含量的影响  

Impacts of calcium silicate addition on brown earth basal respiration and calcium carbonate content

作　　者：张昀[1] 邵帅[1] 关连珠[1] 颜丽[1] 何琳 赵凯[3] 

机构地区：[1]沈阳农业大学土地与环境学院,辽宁沈阳110866 [2]辽宁省辽河保护区管理局,辽宁沈阳110002 [3]辽宁省朝阳市建平县农业技术推广中心,辽宁朝阳122400

出　　处：《中国土壤与肥料》2012年第3期40-42,共3页Soil and Fertilizer Sciences in China

基　　金：国家自然科学基金资助项目(41101455)

摘　　要：采用室内模拟培养的方法,研究了添加硅酸钙对棕壤基础呼吸和碳酸钙含量的影响,为土壤固碳的技术选择提供理论依据。试验设硅酸钙添加量0%、1%、2%、4%和6%5个处理。结果表明,外源硅酸钙在培养前期显著抑制土壤呼吸,其抑制程度随着硅酸钙添加量的增加而增加,平均抑制率为5%(1%处理)～12%(6%处理);整个培养期间,添加硅酸钙处理的土壤碳酸钙含量较对照显著增加,且随着添加量的增加,土壤碳酸钙含量的平均增幅从83%(1%处理)上升到398%(6%处理);土壤呼吸强度和碳酸钙含量之间符合y=Ae-Bx的指数相关关系。上述结果表明,施用硅酸钙通过促进次生碳酸盐的形成从而缓解土壤CO2释放,起到固碳减排的作用。Impacts of exogenous calcium silicate addition on brown earth basal respiration and calcium carbonate content were investigated through an incubation experiment.The treatments included calcium carbonate addition rates of 0%,1%,2%,4% and 6%.Results showed that calcium silicate addition significantly decreased soil respiration during the early incubation,and the mean inhibition rates increased from 5% in 1% treatment to 12% in 6% treatment.Across the incubation,calcium silicate addition significantly increased soil calcium carbonate content,and the increase magnitude increased from 83% in 1% treatment to 398% in 6% treatment.Soil respiration（y）and calcium silicate content（x）showed the significant relationship of y=Ae-Bx.The results demonstrate that calcium carbonate addition could mitigate soil CO2 emission by promoting formation of soil secondary carbonate.

关 键 词：硅酸钙 土壤呼吸 土壤碳酸盐 固碳 

分 类 号：S154[农业科学—土壤学]