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Shvoong Home>Science>Agronomy - Agriculture>Recovery and Control of Saline-alkali Lands in Irrigated Area of Black River Summary

Recovery and Control of Saline-alkali Lands in Irrigated Area of Black River

Article Summary   by:TsingHua     Original Author: Bulletin of Soil and Water Conservation
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Heihe River is located in the dry area of western Gansu Province and Mengolia region,it is the second largest continental river in China.The water of Heihe River comes form Qilian Mountain.The rock of the area weathered,the surface river and subterranean river gathered in the Heihe River irrigated area with large amount of solubile saline(mainly NaHCO_3 and Na_2CO_3),making the proportion of saline of this area increasing steadily,and the soiled destroyed greatly.The improper activities in human productivity and life also increasing the chances of salinization,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 saline-alkali to the surface land,and increases the salinization.Due to these natural and human factors,the salinization became more and more serious,leading to a stretch of saline-alkali spots,even barren land.In the recovery and control of the saline-alkali lands in irrigated area,we should stick to the suit measures to local conditions and sustainable development,and choose some effective measures according to the 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 improvement.
Published: April 30, 2006   
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