| |
Identification
code |
PP00141 |
Project
title |
Investigations
of irrigation regime effectiveness and irrigation technology
using sprinkling irrigation on saline lands of "Pahtaaral"
farm |
Project
location |
The
Republic of Kazakhstan, Chimkent oblast,
Pahtaaral rayon, “Pahtaaral” farm |
Rubric |
70.21.35;
70.21.33 |
Rubric
(SIC ICWC) |
01.30.03;
01.20.05.13 |
Project
duration |
1955-1992 |
Project
manager |
H.I.
Yakubov., SPA SANIIRI
The Republic of Uzbekistan, 700187, Tashkent,
Karasu-4/11 |
Summary |
The
aim of investigations is to define expediency and effectiveness
of sprinkling irrigation on saline lands, verification of
sprinkling regime and technology on saline lands providing
water consumption under crops irrigation, development of
recommendations on salinity restoration prevention under
sprinkling irrigation. Climate is
sharply continental. Relief is hilly.Ground water
depth is 1,0-1,5 m (spring) to 2,5m (autumn). Ground water
salinity is from 5-7 up to 10 g/l and more. Soils are saline
up to 2-2,5m with salt content -0,7-1,5 % on solid residue,
chloride-sulfate type.Experimental
plot is 11,5 t.ha (net), land efficiency -0,85Water supply
through channel and its distributors. 78 wells of vertical
drainage with depth 55-75mm are constricted. Furrows and
sprinkling irrigation using ДДА-100
and ДДА -100M .Investigations
showed that it is possible to apply sprinkling irrigation
on saline soils under intensification drainability of territory.
During vegetation
period irrigation norm is reduced, during non-vegetation
leaching for soils desalinization is increased.
Under combination
of sprinkling and operational leaching desalinization of
aeration zone and top layer of ground water is achieved. |
Key
words |
soils;
sprinklers; water salt regime; leaching norm; leaching;
cotton |
Bibliography |
Author
- H.I. Yakubov Title - “Experiment
on crops sprinkling irrigation on lands subjected to saline
in "Pahtaaral" farmCollection
of scientific literature, Tashkent, SANIIRI, 1989.
Analysis of
30-35 years of experience on crops sprinkling irrigation
on saline soils is given. Systematic analysis of water salt
balance, soils water salt regime, reclamative-ecologic processes
as well as soils and lands productivity changes, obtained
under different conditions of sprinkling irrigation application
are given. High effectiveness of sprinkling irrigation on
background of vertical drainage in conditions subjected
to salinity under leaching regime with ratio B+O:N+T=1,15-1,2
satisfaction is proved. |
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