| |
Identification
Code |
PP00098 |
Project
title |
Cotton
water consumption norm establishing under new irrigated
lands development |
Project
location |
The
Republic of Uzbekistan,
Kashkadarya oblast, Ulyanov rayon, state farm ¹ 24 |
Rubric |
70.21.33;
70.03.15 |
Rubric
(SIC ICWC) |
01.20.01.10; 01.20.05.13 |
Project
duration |
1974-1977 |
Project
manager |
E.D.Cholpankulov,
SPA SANIIRI, Uzbekistan, 700187, Tashkent, Karasu-4, 11 |
Summary |
Study
is devoted to definition of climate changes regularities
and cotton water consumption during new irrigated lands
development for irrigation norm and depth correction. Climate
- continental subtropical; relief - inter-mountain hilly
plain; soils - loam, sandy loam, sand and gravel. Soils
are slightly saline, type of salinity is sulfate. Ground
water table is between 2.13m (February) and 1.28 (August)
with salinity 10-20g/l. Area is l00ha (net), control site-l00
ha. Irrigation network-canal lined by concrete slabs. Plot
is equipped by means of measurement. The following conclusions
were made: -irrigation induces air temperature decrease
on 2-5 degrees; -irrigation effect on thermic regime is
found during all irrigation period; -absolute air humidity
on irrigated cotton field is higher to compare with fallow
land on 5-1 1mb; -air temperature maximum is in June-July;
-heat expenses for evaporation after irrigation increases
by 2-3 times in the beginning of vegetation and insignificantly
to the its end; -evaporation value since June to September
in 1975 was 1236mm, in 1976-1 103mm, in 1977-1076mm; -cotton
yield was: in 1975-l.Ot/ha, in 1976-1.8t/ha, in 1977-2.8t/ha;
-cotton irrigation norm in the firsty and
second year of development should be on 25-30% and 12-15%
higher. Results are recommended for practical application. |
Key
words |
Cotton,
irrigation norm |
Bibliography |
Authors:
E.Cholpankulov, V.Dukhovny, B.Milkis Title: "Water
consumption changes during land development", SANIIRI,
1980 Field investigation results are described including
cotton field water consumption during first-third year of
development. |
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