By taking the Kuqa oasis as a study area

the response of satellite SAR images to the ions of saline soils was analyzed. Two Radarsat images collected in March and October

2001

were selected

and field sampling to soil profiles of 0 -10 and 0-50 cm was made. The values of eight microcosmicions(Na+

K+

Mg2+

Ca2+

Cl-

SO42-

HCO3--

CO32-)

pH value

conductivity

hardness degree

and salt content of saline soils in the typical region were measured according to the measurement point coor dinates in field. The values of each point in the remote sensing images were calculated. The gray associate analytic method was used to carry on the relevant arrangement of eight large ions and the values of the remote sensing images. Results indicated that Radar images in March intensely responded to pH value. The response was unstable to salt content and common to conductivity and hardness degree. For positiveion

the response was most remarkable to Ca2+; and for negativeion

the HCO3- response was most remarkable. Radar images in October intensely responded to pH value and conductivity

were unstable to the salt content

and were middle to the hardness degree. For positive ion

there was no evident rule; and for negative ion

the Cl- response was most remarkable and there was no evident rule in SO42- and HCO3-.