Outlines of this work were presented at the 60th (March 2005), 61st (March 2006) and 64th (March 2008) meetings of the Japanese Society of Grassland Science.
Soil carbon stock in typical grasslands in Japan
Article first published online: 14 MAY 2009
© 2009 The Authors. Journal compilation © 2009 Japanese Society of Grassland Science
Volume 55, Issue 2, pages 96–103, June 2009
How to Cite
Nakagami, K., Hojito, M., Itano, S., Kohyama, K., Miyaji, T., Nishiwaki, A., Matsuura, S., Tsutsumi, M. and Kano, S. (2009), Soil carbon stock in typical grasslands in Japan. Grassland Science, 55: 96–103. doi: 10.1111/j.1744-697X.2009.00145.x
Present address: Kazunori Kohyama, National Institute for Agro-Environmental Sciences, Ibaraki, Japan; Michio Tsutsumi, National Agricultural Research Center for Western Region, Shimane, Japan
- Issue published online: 14 MAY 2009
- Article first published online: 14 MAY 2009
- Received 1 August 2008; accepted 9 February 2009; doi: 10.1111/j.1744-697X.2009.00145.x
- Carbon sequestration;
- soil carbon
To evaluate the carbon (C) sequestration function of grassland soils in Japan, soil C stocks were measured in 24 grasslands (3–43-year-old pastures) across 14 livestock farms nationwide. Soil C stocks varied among soil types, and the values in the upper 25 and 50 cm were higher in Andosols (mean, 12.4 and 19.3 kg m−2, respectively) than in Brown Forest soils (7.5 and 13.7 kg m−2) and other soil types (5.5 and 7.5 kg m−2). At the same time, C stocks varied among pastures within each soil type. Compared to data from the published work on the C content shortly after pasture establishment, aged pastures had decreasing C concentrations as the soil depth increased, suggesting substantial C accumulation in the top soil layers during pasture aging. This C accumulation caused grassland soils to store as much C as adjacent forest soils. Although the C stocks in the grassland soils were not statistically different from those in the adjacent native forest soils, some grassland areas stored greater amounts of C than the forests, indicating a possibility of increasing soil C stocks through improved grassland management.