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American Journal Of Agriculture And Horticulture Innovations  
(ISSN – 2771-2559) 
VOLUME 04 ISSUE 03    Pages: 38-42 

SJIF IMPACT FACTOR (2022: 5. 705) (2023: 7. 471) (2024 - 8.02) 
OCLC – 1290679216   

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 
Publisher: Oscar Publishing Services 

Servi 

 

 

 

 

 

 

 

 

 

 

ABSTRACT 

The article presents the results of field experiments conducted to study the effect of mineral fertilizers of different 

standards on the photosynthetic productivity and pure photosynthesis productivity of winter wheat variety "Asr" in 

the conditions of irrigated light gray soils of Navoi region. It was found that the photosynthesis productivity was 

determined by the accounting balance of mineral fertilizers and the methods of soil plant diagnostics, and the options 

used in combination with pesticides with biologically active organic and mineral fertilizer Rokogumin were the highest. 

KEYWORDS 

Pale gray soil, wheat, mineral fertilizers, biologically active fertilizers, pesticides, leaf area, photosynthetic 

productivity. 

INTRODUCTION

The yield of winter wheat grown in irrigated fields 

varies in a direct relationship with the productivity of 

photosynthetic processes. In order to grow a planned 

high-quality harvest of winter wheat in these fields, it is 

necessary to create its stem number, structure and leaf 

level. For this, in the leaf phenological stages of winter 

wheat, the soil must have sufficient moisture, 

nutrients, temperature, air exchange, and light. 

It is known from the research conducted in different 

soil and climate conditions that in order to grow a high 

and quality crop from winter wheat, its leaf area should 

be 45-50 thousand m2 per hectare and the 

  Research Article 

 

CHANGE OF PHOTOSYNTHETIC PRODUCTIVITY OF WINTER WHEAT IN 

IRRIGATED LIGHT COLOR GRAY SOILS DEPENDING ON THE RATE OF 

MINERAL FERTILIZERS  
 

Submission Date: March 20, 2024, Accepted Date:  March 25, 2024,  

Published Date: March 30, 2024 

Crossref doi: https://doi.org/10.37547/ajahi/Volume04Issue03-07 

 

 

H. Yusupov 
Phd Lalmikor Agricultural Research Institute, Uzbekistan 

 

H. Zaripov 
Independent Researcher Lalmikor Agricultural Research Institute, Uzbekistan 

 

Journal Website: 

https://theusajournals.

com/index.php/ajahi 

Copyright: Original 

content from this work 

may be used under the 

terms of the creative 

commons attributes 

4.0 licence. 

 

https://theusajournals.com
https://doi.org/10.37547/ajahi/Volume04Issue03-07


Volume 04 Issue 03-2024 39 

                 

 
 

   
  
 

American Journal Of Agriculture And Horticulture Innovations  
(ISSN – 2771-2559) 
VOLUME 04 ISSUE 03    Pages: 38-42 

SJIF IMPACT FACTOR (2022: 5. 705) (2023: 7. 471) (2024 - 8.02) 
OCLC – 1290679216   

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 
Publisher: Oscar Publishing Services 

Servi 

photosynthetic activity of the leaves, that is, their 

greenness should last for a long time [1, 2, 3]. . K.E. 

Khalgaeva [4], Depending on the rate of mineral 

fertilizers, various biostimulants in the light chestnut 

soils of Kalmykia 

30.7-46.7 thousand m2/ha, photosynthesis productivity 

was 1322-2017 thousand m2/ha, and net photosynthesis 

productivity (FSM) was 1.02-2.11 g/day. 

Experiment methodology. In 2022-2023, field 

experiments were conducted on irrigated light-colored 

meadow soils of the farm "Navbahor Saigali Kamoli" in 

Navbahor District, Navoi Region. 

The soil of the experimental field is humus, low in 

nitrogen, moderately supplied with phosphorus and 

potassium substances, and the level of groundwater 

It is 3-4 m. There were 11 variants of the experiment and 

they were repeated in three repetitions. The volume of 

plots (plots) was 400 m2, the area to be considered 

was 200 m2. Phosphorous (ammophos) and potash 

fertilizers (potassium salt) were applied under the 

plow in the fall, and urea with nitrogen fertilizers (46%) 

was given (tufting, hoeing and earing). 

Effect of combined application of mineral and organo-mineral fertilizers and pesticides on photosynthetic 

productivity of winter wheat, average in 2022-2023 

t/r Options 
Tubing-earing Spike-ripening Milk-wax ripening 

During the average 

growing season 

1 2 3 1 2 3 1 2 3 1 2 3 

1 
Fertilizer-

free option 
3,13 0,845 1,67 3,65 1,060 5,38 3,30 0,380 0,380 0,85 3,36 0,695 

2,632 
R90K90-фон I 

- autumn 
3,40 0,935 1,73 3,93 1,143 5,22 4,13 0,275 0,95 3,82 0,784 2,65 

3 
Background 

I +N150 
3,48 0,952 1,78 3,83 1,114 5,22 3,97 0,304 1,10 3,76 0,790 2,76 

4 
Background 

I +N180 
3,64 0,974 1,76 3,91 1,130 5,97 4,01 0,356 1,08 3,85 0,820 2,25 

5 
Background 

I +N210 
3,67 1,055 1,80 4,07 1,181 5,40 4,06 0,358 1,02 3,93 0,865 2,74 

6 
R120K70 фон 

II- autumn 
3,48 0,930 1,74 4,16 1,214 5,35 4,10 0,244 0,98 3,94 0,796 2,63 

7 
Background 

II +N150 
3,82 1,109 1,84 4,45 1,523 5,40 4,36 0,371 1,05 4,21 0,988 2,76 

8 
Background 

II +N180 
4,06 1,177 1,98 4,77 1,384 5,40 4,64 0,360 1,05 4,49 0,973 2,81 

9 
Background 

II +N210 
4,16 1,249 2,28 4,91 1,427 5,65 4,76 0,390 0,98 4,61 1,022 2,97 



Volume 04 Issue 03-2024 40 

                 

 
 

   
  
 

American Journal Of Agriculture And Horticulture Innovations  
(ISSN – 2771-2559) 
VOLUME 04 ISSUE 03    Pages: 38-42 

SJIF IMPACT FACTOR (2022: 5. 705) (2023: 7. 471) (2024 - 8.02) 
OCLC – 1290679216   

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 
Publisher: Oscar Publishing Services 

Servi 

10 

NPK-70 ts/ha 

for crop + 

RG+20 g 

herbicide+ 

0.15 l 

fungicide + 

0.15 l/ha 

insecticide + 

spraying 

(suspension) 

4,32 1,306 2,34 5,65 1,466 5,68 5,09 0,461 1,25 1,25 4,82 1,078 

3,0911 

NPK-80 ts/ha 

for crop + 

NK+20 g 

herbicide+ 

0.15 l 

fungicide + 

0.15 l/ha 

insecticide + 

spraying 

(suspension) 

4,26 1,390 2,25 4,98 1,420 5,05 4,88 0,420 1,08 4,65 1,043 2,99 

 

Note: 1-leaf level index, thousand m2; 2-photosynthesis productivity, million m2/ha; 3-photosynthesis net 

productivity, g/m2 day; RG-Rokogumin organo-mineral fertilizer; NK-Nanokrem is a biologically active fertilizer 

containing SiO3.  

During the years of the experiment, the 

photosynthetic productivity (FM) and net 

photosynthetic productivity (FSM) of winter wheat 

were determined at different phenological stages 

depending on the leaf level index determined by the 

cross-sectional method (method vysechki). 

According to the data of the Navoi Agrotechnology 

Department, the annual average rainfall is 196 mm, the 

average monthly air temperature is 12.3 0C, and the 

relative humidity is 65%. It was 13.4 0C, and the relative 

air humidity was 49%. In 2023, the amount of 

precipitation was 84 mm less than the long-term 

average, the air temperature was 1.3 0C lower, and the 

relative air humidity was almost 20% less than the long-

term average. 

RESEARCH RESULTS 

According to the results of a two-year experiment, the 

effect of organic and mineral fertilizers on the index of 

wheat leaf level on the area of the planned autumn 

wheat harvest was noted already in its budding phase. 

At this stage, in the control of the experiment without 

fertilizers, the index of the leaf surface of wheat was 

on average 3.13 thousand m2, and its highest indicators 

(4.32 thousand m2) of the experiment were 

determined by the calculation balance method and 



Volume 04 Issue 03-2024 41 

                 

 
 

   
  
 

American Journal Of Agriculture And Horticulture Innovations  
(ISSN – 2771-2559) 
VOLUME 04 ISSUE 03    Pages: 38-42 

SJIF IMPACT FACTOR (2022: 5. 705) (2023: 7. 471) (2024 - 8.02) 
OCLC – 1290679216   

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 
Publisher: Oscar Publishing Services 

Servi 

soil-plant diagnostics. methods (10 variants) were 

determined. In this option, the level of winter wheat 

leaves was found to be 1.19 thousand m2 higher than in 

the option without fertilizer. 

According to the researches, the highest indicators of 

the leaf surface index of "Asr" autumn wheat (5.05 

thousand m2) were given through the roots of mineral 

fertilizers determined by the calculation balance 

method during the ripening period of the ear, 

containing amino acids, fulvates, macro and micro 

fertilizers Rokogumin (RG). along with biologically 

active fertilizers, 5% KAS (a mixture of carbamide and 

ammonium nitrate) and pesticides suspension was 

determined in the sprayed variant. By the milk wax 

ripening stage of winter wheat, a sharp decrease in the 

leaf level index was observed in the control variant of 

the experiment, and on the contrary, it was much 

higher in the variants given mineral fertilizers of 

different rates. 

Photosynthetic productivity (FM) is one of the main 

parameters determining the duration of 

photosynthetic activity of winter wheat leaves in 

irrigated fields. The higher and more continuous the 

FM indicators are, the more the soil contains all the 

vital factors for the plant (moisture, nutrients, 

temperature, light, aeration). 

In the non-fertilized control version of the experiment, 

the photosynthetic productivity of "Asr" winter wheat 

variety during the growing season was on average 

0.659 million m2/ha, and in the fertilized versions it was 

0.784-1.078 million m2/ha. 

Its highest indicator (1.078 million m2/ha) of winter 

wheat according to the leaf level index was recorded in 

10 options fed according to the calculation balance of 

the experiment and brg diagnostic method for yielding 

70 ts/ha. In this variant, the spraying of Rokogumin 

universal organic and mineral fertilizer (2.5 l/ha), 5% 

KAS, fungicide and insecticide (0.15 l/ha) in winter 

wheat during the tuber and earing phases increased 

the photosynthetic productivity of winter wheat. . 

The level of use of photosynthetically active radiation 

of winter wheat is determined by the photosynthetic 

net productivity (FSM) of the plant, that is, the amount 

of crop biomass during the day. According to the 

results of two years of research, the highest FSM 

indicators of winter wheat were recorded during the 

periods of milk ripening. Due to the natural fertility of 

the experiment during the growing season, the FSM 

indicator of winter wheat was 2.63 g/day on average, 

while this indicator was 2.65-3.09 g/day in varieties fed 

through roots and leaves at different rates.  

According to two years of research, the following 

conclusions can be reached: 

CONCLUSIONS 

1. In the irrigated light-colored grassland soils of Navoi 

region, which are poorly supplied with humus and 

mineral nutrients directly assimilated by plants, the 

index of the leaf level of the winter wheat variety "Asr" 

was 3.36-4.87 thousand m2, depending on the norm of 

mineral fertilizers. 

2. Physiologically active radiation (FAR) utilization rate 

of winter wheat is determined by leaf photosynthetic 

productivity (FM) and net photosynthesis productivity 

(FSM). These indicators are respectively 0.695 mln. 

m2/ha and was 2.63 g/day. 

REFERENCES 

1. 1.Каюмов М.К. Программа и методика 

постановки опытов и проведения исследований 

по программированию урожаев полевых 

культур –М., 1976- 25 с. 



Volume 04 Issue 03-2024 42 

                 

 
 

   
  
 

American Journal Of Agriculture And Horticulture Innovations  
(ISSN – 2771-2559) 
VOLUME 04 ISSUE 03    Pages: 38-42 

SJIF IMPACT FACTOR (2022: 5. 705) (2023: 7. 471) (2024 - 8.02) 
OCLC – 1290679216   

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 
Publisher: Oscar Publishing Services 

Servi 

2. Шатилов И.С., Каюмов М.К. Максимальное 

аккумулирования солнечной энергии 

культурными растениями-важнейшая задача 

современного земледелия. Душанбе, 1982 , ст. 

28-40.  

3. 3, Каюмов М.К. Методика расчета норм 

удобрений при программировании урожаев –

Тезисы док./ всесоюзной конференции по 

программированию урожаев. М., 1978 г, ст-17-80. 

4. 4. Халгаева К.Э. Комплексное влияние 

стимуляторов роста и минеральных удобрений 

на урожайность озимой пшеницы в условиях 

светло каштановых почв Калмикии. 

Автореферат канд.. дисс., 2012 , 22 ст. 

 

 


