施肥措施对矿区复垦土壤活性有机碳库的影响

为了研究不同施肥措施对矿区复垦土壤活性有机碳库和碳库顽固性指数的影响，以山西矿区复垦土壤的2年定位施肥试验为例，采用硫酸水解法分析。结果表明：施肥对矿区复垦土壤活性有机碳的形成有一定的促进作用，以单施有机肥和有机无机配施处理的效果最显著，其中有机肥处理土壤活性碳库Ⅰ较CK提高了100%，有机肥和无机肥配施土壤活性碳库Ⅰ较CK处理提高了267%，有机肥处理土壤活性碳库Ⅱ较CK提高了500.5%，有机肥无机肥配施处理土壤活性碳库Ⅱ较CK提高了335.4%；不同施肥处理下土壤活性碳库Ⅰ、Ⅱ随季节的动态变化趋势基本一致；各施肥措施都能有效降低土壤碳库顽固性指数(RIC)，有机肥处理降低的最多。总之，施肥能有效促进矿区复垦土壤有机碳增加，且有机肥处理效果最佳。

Effect of Different Fertilization Treatment on Soil Labile Organic Carbon in Mine Reclamation

Taking an example of a two years fertilization trial in mine reclamation soil from Shanxi Province region, China, the effect of different fertilization treatment on mine reclamation soil labile organic carbon and carbon management index were studied in this paper. Soil labile organic carbon was measured with sulfuric acid hydrolysis method. The results showed that: fertilization treatment had certain roles in promoting formation of labile organic carbon pool of mine reclamation soil, single or combined organic and inorganic fertilizers had most remarkable influence. The content of labile Ⅰ organic carbon with organic treatment and combined organic and inorganic fertilizers respectively increase by 100% and 267% than the control. The content of labile Ⅱ organic carbon with single organic treatment and combined organic and inorganic fertilizers respectively increase by 500.05% and 335.4% than the control. Soil labile organic carbon with seasons had the same variation trend in the different treatment. Fertilization treatments all could reduce refractory index of the soil carbon pool, and single organic treatment reduced most. In short, fertilization treatments could promote soil organic carbon content effectively in reclamation, and the organic fertilizer treatment is the best.