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分析了长期不同施肥制度对潮棕壤活性碳库及碳库管理指数的影响。结果表明:长期施肥不同施肥制度对土壤活性碳库、碳素有效率及碳库管理指数有很大影响,长期施用有机循环肥处理,尤其是循环肥配合均衡化肥(NPK+O)施用处理的土壤有机碳、易氧化碳(ROC)、溶解性有机碳(DOC)、微生物量碳含量(MBC)、土壤碳素有效率及土壤碳库管理指数明显高于对照处理的土壤。潮棕壤活性碳库中不同形态的碳素含量大小顺序为:CROC>CMBC>CDOC,同一施肥处理水平下,不同形态碳素有效率以ACC>ABC>AAC。相关分析表明:土壤碳素有效率和碳库管理指数与土壤的化学性质尤其是土壤养分因子呈显著或极显著相关,反应了农业生产措施对土壤碳库的影响,运用土壤碳库管理指数可以很好地反映出土壤碳库的动态变化。
The effects of long-term different fertilization systems on active carbon pool and carbon pool management index in tidal brown soil were analyzed. The results showed that long-term fertilization and different fertilization systems had a significant impact on soil active carbon pool, carbon efficiency and carbon pool management index. Long-term application of organic fertilizer, especially the application of recycled fertilizer and NPK + O treatment Soil organic carbon, ROC, DOC, MBC, soil carbon efficiency and soil C stocks management index were significantly higher than the control soil. The order of carbon content of different forms of carbon pool in tidal brown soil was CROC> CMBC> CDOC. Under the same fertilization level, the carbon efficiency of different forms was ACC> ABC> AAC. Correlation analysis showed that soil carbon efficiency and carbon management index were significantly or very significantly correlated with soil chemical properties, especially soil nutrient factors, reflecting the impact of agricultural practices on soil carbon pool. Using the soil carbon pool management index It reflects the dynamic changes of soil carbon pool.