We measured soil respiration(SR) and soil characteristics under canopy and open land of Tamarix ramosissima Ledeb.in field station(FS) and Haloxylon ammodendron Bge.in north desert(ND)

southern of Gurbantunggtun desert

with an infrared gas analyzer system(model CIRAS-1

PP Systems

Hitchin

UK) equipped with a flow-through closed chamber.The results showed that heterogeneity of characteristics was different significantly between canopy and open land

soil respiration under canopy was higher than open land.In FS scrubland

the characteristics such as: SOM

EC

TN

CaCO_3 content were higher than ND as well as soil respiration.Relativity of soil respiration and CaCO_3 was marked;the changes of CaCO_3 content controlled the changes of soil respiration in temporal and spatial in scrubland.The objective of this study was to investigate spatial change of soil characteristics and soil respiration in scrubland

the changes were critical to understand the ecosystem process of desert

interaction between soil microbial and soil characteristics

study of global climate change.