Abstract:
The typical degraded alpine meadow in Songpan County was taken as the research object, and compared the restoration results of traditional cattle manure and new ecological organic fertilizer, to evaluate the effectiveness of the new ecological organic fertilizer on alpine meadow, which was a resource utilization product of agricultural organic waste. The results showed: 1) The ecological organic fertilizers were better than cow manure in improving the carbon pool of alpine meadow ecosystem. At the application of 750 kg·hm
−2 of ecological organic fertilizer, the soil organic carbon increased by 30.12% relative to CK, which achieved optimal effect. And at the application of
1050 kg·hm
−2, the soil organic carbon stock increased by 52.59%, and at the application of 450 kg·hm
−2, the vegetation organic carbon stock reached 6.1 times that of CK. 2) The improvement effects of ecological organic fertilizer on plant growing and community diversity was better than that of cow manure. At the application of
1050 kg·hm
−2, the average plant coverage and height showed optimal increases. And at the 450 kg·hm
−2 ecological organic fertilizer addition, both aboveground and belowground biomass reached high levels with a reasonable root-to-shoot ratio. At the application of 750 kg·hm
−2, the species composition consistency of plant communities were maintained while communities diversity were improved. Overall, when the application of ecological organic fertilizer was set at 750 kg·hm
−2, a good balance was achieved in promoting plant growing, enhancing carbon sequestration and sink, and maintaining community diversity. This approach can serve as an effective artificial restoration strategy for the restoration of degraded alpine meadows.