Carbon Stock and Storage Potential as Affected by Land-Use in Meadow Steppe of Northeast China

摘要

Accurately predicting terrestrial carbon (C) storage requires understanding the stock and storage potential of C .because it helps us understand bow ecosystems would respond to natural and anthropogenic disturbances under different management strategies. We investigated organic C storage in aboveground biomass, litter, roots, and soil organic matter (SOM) in six land-use types (i.e. artificial pasture, AP; natural meadow, NM; corn plantation, CP; bare land, BL; pasturable grassland, PG; and enclosed grassland, EG)in meadow steppe of Northeast China. The primary objective of this study was to ascertain the impact of different land-use types on the stock and storage potential of C. The results revealed that the total C storage (including aboveground biomass, litter, roots, and SOM, i.e. 0-100-Cm soil layer) was significantly different between one and another type among the five pairs (P< 0.05), and varied from 5829.4g.Cm3 to 16451.6gCm . The C stored in the aboveground biomass was less than 2014.2 g_C.m"2, accounting for negligible amounts (<1% of the total) of total C storage except corn plantation in the ecosystem. The amount of C stored in SOM accounted for over 90% of the total C storage in AP, NM, BL, PG, and EG, and the C stored in litter was very low (