Identification Code

PP00174

Project title

Assessment of different  types of leaching effectiveness on background of vertical drainage

Project location

Tajikistan, Khatlon oblast, Bohtar rayon, collectivefarm "Safarov"

Rubric

70.21.39

Rubric (SIC ICWC)

01.45

Project duration

1964-1968

Project manager

I.Aliyev, TASHI, Tajikistan, Dushanbe, 734001, Rudaky str. 21a

Summary

Study is directed to soil salination prevention based on soil profile desalination, leaching and vertical drainage role definition. Climate is continental, sub-tropical. Relief- cup-shaped.  Soils-sierozems, partially saline, (3g/l on average), chloride-sulfate and sulfate-chloride type. Ground water depth is 0.5-3.0 m, salinity 50g/l, chloride-sulfate. The following conclusion is made: -for salts and strongly saline soils desalination saline ground water (4-6 g/l) can be used; -leaching over 20ha and more on background of vertical drainage does not negatively affects ecologically beyond irrigated field; -slowed with  interruptions of 10-20 days water supply with vertical drainage stoppage at the same time, leaching accoding to desalination effect; -more check ridges size, more soil mass remains unleached that creates secondary salination.

Key words

Soil salination, leaching, salinity, cotton

Bibliography

1. Authors: P.Pankratov, V.Kireev, A.Sundukov Title: "Experience of saline soils leaching by saline ground water", Dushanbe, 1969 4.   Authors: V.Kireev, Title: "Saline soil under rice leaching on background of vertical drainage", Dushanbe, 1989 Saline water (5-10g/l) use experience for salt desalination is shown. Soil desalination effective technology is shown for rice irrigated by fresh water.