Heihe River is located in the dry area of western Gansu Province and Mengolia region

it is the secondlargest continental river in China.The water of Heihe River comes form Qilian Mountain.The rock of the areaweathered

the surface river and subterranean river gathered in the Heihe River irrigated area with large amount ofsolubile saline (mainly NaHCO3 and Na2CO3)

making the proportion of saline of this area increasing steadily

andthe soiled dest royed greatly.The improper activities in human productivity and life also increasing the chances ofsalinization

and it is the main reason of the continual increase of salinized area and the damage of salinization.Blindly reclaiming wasteland

over pasturing

lumbering make the grassland seriously deteriorated.Over reclaiming wasteland brings the under surface salinealkali to the surface land

and increases the salinization.Due to thesenatural and human factors

the salinization became more and more serious

leading to a st retch of salinealkalispots

even barren land.In the recovery and cont rol of the salinealkali lands in irrigated area

we should stick tothe suit measures to local conditions and sustainable development

and choose some effective measures according tothe degree and character of salinized area and its local economy

society and ecological environment.From the author's point of view

there are four feasible measures to improve the situation of salinization in Heihe River irrigated area

namely agricultural techniques

water conservancy project

biogeographical improvement and chemical im2provement.