Пахта селекцияси, уруғчилиги ва етиштириш агротехнологиялари илмий-тадқИҚот институти

 
Official opponents: 
 
 
 
 
 
Nurmatov Sherali Nurmatovich 
doctor of Agricultural Sciences, рrofessor 
Isashov Anvarjan 
doctor of Agricultural Sciences, рrofessor 
Fayziev Zhamaliddin Nasirovich 
doctor of Agricultural Sciences, аssociate 
рrofessor 
Leading organization: 
Tashkent state agrarian university 

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53 
INTRODUCTION (abstract of DSc dissertation) 
The research work aims to determine the irrigation regime of intensive apple 
orchards, irrigation norms, and timing, determination of seasonal water 
consumption and improvement of methods for calculating irrigation water norms, 
improvement of methods for modeling parameters of the moisture contour of the 
calculated soil layer with various irrigation methods and development of scientific 
foundations of irrigation technology that ensure minimum water consumption. 
The object of the research work is were taken as typical gray soils subject to 
irrigation erosion, light gray and meadow-alluvial, swampy meadow-gray soils, and 
intensive varieties of apple trees "Gala", "Golden" and "Ruby Star". 
The scientific novelty of the research work is the following:  
for the first time, apple orchards intensively provided humidity of the 
calculated 0.8 m soil layer, irrigation by 75-80-70% in relation to specific field 
moisture capacity, irrigation rationing in typical gray soils 400-560 m
3
/ha in farms 
with transverse fencing, seasonal irrigation norms 2200-2400 m
3
/ha, normalization 
of drip irrigation in meadow alluvial soils 60-90 m
3
/ha, irrigation norm 950-1200 
m
3
/ha, in conditions of swampy meadow-gray soils, the irrigation rate from the 
film-covered beds is 460-700 m
3
/ha, the irrigation rate is 1900-2000 m
3
/ha, it is 
established, that in conditions of light gray soils, it is advisable to set the irrigation 
standard in the traditional way at 360-500 m
3
/ha, and the seasonal water norm at 
1900-2000 m
3
/ha; 
the methodology of conducting field experiments based on a full-factor 
experiment, as well as a mathematical model for determining the dynamics of soil 
moisture to establish the irrigation rate in this method were developed and 
approved by the Intellectual Property Agency of the Republic of Uzbekistan 
"Advantages of using water-saving technologies in intensive gardens" and a model 
for determining the dynamics of soil moisture based on "4 factors" for electronic 
computer programs DGU 14666 and DGU 15552; 
the method of calculating irrigation rates for drip irrigation of intensive apple 
orchards proposed by V.N.Shkura 
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has been improved; 
a scientific and practical theory of irrigation technology has been developed, 
based on the absorbing power of the soil (the law of osmosis) for watering 
seedlings of intensive apple trees; 
the influence of the elements of irrigation regimes and techniques in various 
soil and climatic conditions on the irrigation rate of intensive apple orchards and 
seasonal water consumption was studied, it was found that with any irrigation 
method, providing a calculated soil layer of 0.8 m with moisture, irrigation of about 
75-80-70% compared with the marginal field moisture capacity saves seasonal 
water consumption by 3.7-25.4%; 
seasonal water consumption of intensive apple varieties in various soil 

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54 
climatic conditions with irrigation of about 75-80-70% of the maximum field 
moisture capacity while providing the calculated 0.8 m soil layer with moisture 
4.4% higher than the control amount of precipitation, 5.8% more irrigation water 
use, 6.3% less total water consumption and higher (1.0-7.4 t/ha) by on the basis of 
ensuring the cultivation of the apple harvest; 
the scientific foundations of the influence of irrigation methods and 
technologies on the growth, development, crop quality and yield of apple trees of 
intensive apple orchards aimed at saving irrigation water have been developed.