Xiao, X., and D. Ojima. 1999. NPP Grassland: Tumugi, China, 1981-1990. Data set. Available on-line [http://www.daac.ornl.gov] from Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, U.S.A.
The Tumugi study site (approximately 46.1 N 123.0 E) is located about 60 km east of the city of Ulan Hot (approximately 300 km west of Harbin, China). It is representative of the meadow steppes of eastern Inner Mongolia, which cover about 50,000 km2 in Inner Mongolia and are widely distributed in the Euro-Asian steppe zone. With a continental sub-humid climate dominated by monsoon rains from April to September, these grasslands are grazed by sheep and cattle at moderate grazing intensity. Net primary productivity is known to vary considerably both spatially and from year to year as a function of precipitation and temperature.
Data are available for three different steppe species: Filifolium sibiricum, Stipa baicalensis, and Leymus chinense. The 250 m x 40 m species plots have been fenced since 1976 for long-term monitoring of productivity, and each is divided into five 50 m x 40 m sub-plots for field sampling. Above-ground net primary productivity was estimated at 155 g/m2/year (average of three plots, based on peak above-ground biomass). Data on biomass dynamics have been compared with simulation results from the CENTURY model.
Telephone: +1 (603) 862-1792/ 862-3818
Fax: +1 (603) 862-0188
E-mail: xiangming.xiao@unh.edu
Alternative Contact: Dr. Dennis Ojima
Natural Resource Ecology Laboratory
Colorado State University
Fort Collins, Colorado 80523
U.S.A.
Telephone: +1 (970) 491-1976
Fax: +1 (970) 491-1965
E-mail: dennis@nrel.colostate.edu
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