Changes of carbon storage and carbon sequestration in plantation ecosystems on purple soil

Abstract

Abstract: This paper studied the carbon storages and carbon sequestration capacities of degraded plantation ecosystems in purple soil area.Using space-time replacement method,four ecological restoration treatments (Ⅰ,Ⅱ,Ⅲ and Ⅳ) were selected on the basis of erosion intensions from high to low in Ninghua,Fujian.Treatment Ⅰ was not treated with any other measures after afforestation.Treatment Ⅱ adopted engineering soil and water conservation measure after afforestation.In treatment Ⅲ,the engineering measure associated biological measure was taken after afforestation.As for treatment Ⅳ,enclosure was adopted to protect against anthropogenic disturbances after afforestation.We observed that the carbon sequestration potential was increased with weakening erosion degree,i.e.,Ⅰ<Ⅱ<Ⅲ<Ⅳ.The carbon storage of 4 treatments was 1.4,8.5,25.6 and 37.6 t·hm^-2,and the annual assimilation of CO₂ was 712.87,1458.01,9718.10 and 11109.56 kg·hm^-2,respectively.It was suggested that the restored forest ecosystem was one of the important carbon sinks in this area.Engineering soil and water conservation measure associated biological measure would be the main means of restoring degraded ecosystem.But presently,the reasonable strategy was to decrease human's disturbances,and hence,the enclosure for reforestation could be used to transform forest ecosystem into carbon sink.

Key words: Purple soil, Carbon storage, Carbon sequestration, Carbon sink, Ecological restoration

CLC Number:

S718.5

YU Zhanyuan, YANG Yusheng, CHEN Guangshui. Changes of carbon storage and carbon sequestration in plantation ecosystems on purple soil[J]. Chinese Journal of Applied Ecology, 2004, (10): 1837-1841.

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