Project
manager |
Aliyev
I.S., Nil of Soil science of Tadjik Agriculture Institute
The Republic of Tadjikistan, Dushanbe, Rudaky av., 21a. |
Summary |
Studies
are dedicated to development of measures set on preventing
soil salinization on base of increasing land drainability
by constructing vertical drainage, establishment of reclamation
effectiveness of this type drainage in conditions of multi-layer
soils as well as soil water-salt regimes management for
creation and rehabilitation of their fertility. Climate
is subtropical continental. Relief is bowl-like. Soils -
salts, gray desert and their meadow subspecies, salinity
type is chloride-sulfate and sulfate-chloride, with high
gypsum content. Ground water table is 0.5-3.0 m, salinity
degree in south-west part of EPP is very high 100 g/1 and
more, in canal zone - 3-5 g/1 and less, salinity type -
chloride-sulfate-calcium. EPP area is 400 ha. Irrigation
network - in earthen channel, specific length is 20 m/ha.
Release and collector-drainage network - open, specific
length is 22 m/ha, depth is l-2 m. Around central part of
bowl three vertical drainage systems were constructed as
triangle with 1 km interval between them on depth to 51
m. EPP is equipped with account means of water, salts as
well as vertical drainage system, and piezometric network.
In result of studies set of measures was developed on improving
soil water-salt regimes management and reclamation-ecological
process regulation on the background of vertical drainage
system combined with shallow low-effective open horizontal
drainage. |
