【摘要】 牡蛎壳粉通常用于缓解农业生态系统中的土壤酸化，然而，其对土壤碳动态的影响在很大程度上仍然未知。以福建茶园红壤为研究对象，进行为期89 d的室内培养试验，设置对照（CK）、0.072 g牡蛎壳粉（T1）、0.217 g牡蛎壳粉（T2）、0.290 g牡蛎壳粉（T3）,并对茶园红壤理化性质和土壤CO₂排放进行测定。结果表明，培养89 d后，不同用量外源物的添加均明显提高了土壤的pH,促进了茶园土壤有机碳的矿化，且整体呈现正激发效应。与CK相比，牡蛎壳粉处理茶园土壤CO₂排放速率分别提高14.29%～48.40%、19.71%～118.39%、18.31%～200.00%,累积排放量分别增加了27.45%～48.40%、53.34%～77.12%、96.03%～130.55%,表现为随着牡蛎壳粉用量增加而增加。更多还原

【Abstract】 Oyster shell powder is commonly used to alleviate soil acidification in agroecosystems. However, its effect on soil carbon dynamics remains largely unknown. Taking the red soil of Fujian tea garden as the research object, an 89-day indoor culture experiment was carried out. The control（CK）, 0.072 g oyster shell powder（T1）, 0.217 g oyster shell powder（T2） and 0.29 g oyster shell powder（T3） were set up, and the physical and chemical properties of red soil and soil CO₂ emission in tea garden were determined. The results showed that after 89 days of culture, the addition of different amounts of exogenous substances significantly increased soil pH, promoted the mineralization of soil organic carbon in tea garden, and showed a positive excitation effect as a whole. Compared with CK, the CO₂ emission rate of tea garden soil treated with oyster shell powder increased by 14.29%～48.40%, 19.71%～118.39% and 18.31%～200.00%,respecially.The cumulative emissions increased by 27.45%～48.40%, 53.34%～77.12% and 96.03%～130.55%, respectively, showing an increase with the increase of oyster shell powder.更多还原