SCIENCE AND INNOVATION IN THE
EDUCATION SYSTEM
International scientific-online conference
136
THE EFFECT OF BIOSTIMULANTS ON COTTON YIELD
Xamidov M.
Tashkent Institute of Irrigation and Agricultural Mechanization Engineers,
National Research University Professor of the
Department of Irrigation and Melioration
Saylixanova M.
Tashkent Institute of Irrigation and Agricultural Mechanization Engineers,
National Research University Bukhara Institute of Natural Resource
Management, Master's student in Melioration and Irrigated Agriculture.
https://doi.org/10.5281/zenodo.14221582
Abstract
Cotton is a vital crop for the global textile industry, but its production is
increasingly challenged by environmental stressors such as drought, soil
salinity, and nutrient deficiencies. Biostimulants, which are natural or synthetic
substances that enhance plant growth and stress resilience, offer a sustainable
solution to these challenges. This article explores the effect of biostimulants on
cotton yield, highlighting their ability to improve stress tolerance, promote root
development, increase nutrient uptake, and enhance water use efficiency. The
use of seaweed extracts, amino acids, humic substances, and beneficial
microorganisms has been shown to significantly improve cotton growth under
adverse conditions, leading to higher yields and better-quality cotton. The
application of biostimulants also helps cotton plants cope with abiotic stresses,
making them more resilient to environmental fluctuations. This review
concludes that biostimulants offer a promising approach to optimizing cotton
production, particularly in regions affected by water scarcity and soil salinity.
Further research and field trials are necessary to refine application methods and
maximize the benefits of biostimulants for cotton farming.
Key words
: biostimulants, cotton yield, stress tolerance, root
development, nutrient uptake, seaweed extracts, water use efficiency.
Introduction
Cotton is one of the most important crops globally, providing raw material
for the textile industry and contributing significantly to the agricultural
economy. However, cotton production faces various challenges, including
environmental stressors such as drought, soil salinity, and nutrient deficiencies.
To combat these issues, the use of biostimulants has emerged as a promising
solution. Biostimulants are substances or microorganisms that enhance the
plant's natural processes, improving growth, yield, and resistance to stress. This
SCIENCE AND INNOVATION IN THE
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article explores the effect of biostimulants on cotton yield and how they can be
used to optimize cotton production.
What are biostimulants?
Biostimulants are naturally derived or synthetic products that promote
plant growth and development. They can include organic substances like amino
acids, seaweed extracts, and humic acids, as well as beneficial microorganisms
such as fungi and bacteria. Biostimulants work by enhancing plant physiological
processes, improving nutrient uptake, increasing stress tolerance, and
promoting root development. They are considered environmentally friendly
alternatives to chemical fertilizers and pesticides, offering a more sustainable
approach to crop management (Ergün et al., 2019).
Impact of biostimulants on cotton yield
1.
Enhanced stress tolerance: One of the primary benefits of biostimulants in
cotton production is their ability to help the plant cope with
environmental stresses. These stresses include drought, high
temperatures, and salinity, which can reduce cotton yields. Biostimulants
can help cotton plants by improving their water retention, enhancing
osmotic adjustment, and increasing the production of protective
compounds such as antioxidants. These mechanisms enable cotton plants
to survive and even thrive under adverse conditions (Crouch et al., 2015).
2.
Improved root development: Healthy root development is crucial for
cotton plants, as roots are responsible for absorbing water and nutrients.
Biostimulants, particularly those containing seaweed extracts or beneficial
microorganisms, have been shown to stimulate root growth, resulting in a
more extensive and efficient root system. A well-developed root system
enables cotton plants to better access water and nutrients, which directly
contributes to increased yield (Khan et al., 2014).
3.
Increased nutrient uptake: Biostimulants can enhance nutrient absorption
by improving the plant's root function and increasing nutrient availability
in the soil. For cotton, proper nutrient management is essential for
maximizing yield potential. By stimulating the soil’s microbial activity,
biostimulants help release nutrients that are otherwise inaccessible to the
plant, leading to better growth and higher cotton yields (Vázquez et al.,
2014).
4.
Enhanced flowering and boll development: Biostimulants have been found
to positively affect the flowering and boll formation stages in cotton. The
application of biostimulants can improve the plant's hormonal balance,
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promoting better flowering, fruit set, and boll retention. This leads to a
higher number of bolls and, consequently, an increase in cotton yield
(Hassan et al., 2015).
5.
Improved water use efficiency: Water scarcity is a significant issue in
cotton production, particularly in regions facing drought or water
shortages. Biostimulants help improve water use efficiency by increasing
the plant's ability to retain water, reducing the overall water requirement
for optimal growth. This is especially beneficial in arid and semi-arid
regions where cotton farming is most vulnerable to water stress (López-
Bucio et al., 2015).
Figure 1. The role of biostimulants and bioeffectors as alleviators of abiotic
stress in crop plants.
Types of biostimulants used in cotton production
Several types of biostimulants have been researched and used in cotton
farming. Some of the most common include:
Seaweed extracts: Rich in plant growth hormones like auxins and
cytokinins, seaweed extracts help improve root growth, increase stress
resistance, and enhance overall plant health (Siva et al., 2016).
Amino acids and peptides: These biostimulants aid in protein synthesis
and improve the plant’s ability to respond to environmental stress. They
can also promote better nutrient uptake (Tariq et al., 2017).
Humic substances: Humic acids help improve soil structure and enhance
the microbial activity in the soil, resulting in better nutrient availability for
cotton plants (Uygur et al., 2019).
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Beneficial microorganisms: Certain bacteria and fungi, such as
Rhizobium
and
Trichoderma
, are used as biostimulants to enhance nutrient cycling,
improve root health, and suppress harmful pathogens (Zhao et al., 2017).
Practical applications and considerations
While biostimulants have shown promising results in increasing cotton
yield, their effectiveness depends on several factors, including the type of
biostimulant used, application timing, environmental conditions, and soil health.
It is essential for cotton farmers to consider the specific needs of their crop and
the local growing conditions before choosing a biostimulant.
Application Timing: The timing of biostimulant application is crucial for
maximizing benefits. For example, applying biostimulants during critical
growth stages, such as germination, flowering, or boll development, can
have the most significant impact on yield.
Dosage and Frequency: Overuse or improper application can lead to
suboptimal results. It is important to follow recommended dosage
instructions and application frequencies to avoid potential negative
effects.
Conclusion
Biostimulants offer a sustainable and effective approach to improving
cotton yield, especially in challenging growing conditions. By enhancing stress
tolerance, promoting root growth, increasing nutrient uptake, and improving
water use efficiency, biostimulants contribute to higher yields and better-quality
cotton. As cotton farming faces increasing environmental pressures,
biostimulants present a promising solution for optimizing production and
ensuring the sustainability of this crucial crop. Further research and field trials
will help refine biostimulant applications and maximize their potential in cotton
farming.
References:
1.
Crouch, I. J., van Staden, J., & Magwaza, L. S. (2015). The effect of
biostimulants on plant growth and productivity: A review. Field Crops Research,
181, 13-24.
2.
Ergün, M., Şahin, F., & Kaya, E. (2019). Biostimulants in agriculture: A
review of their effects on crop growth. Biology and Fertility of Soils, 55(7), 607-
621.
3.
Hassan, M. U., Zubair, M., & Arshad, M. (2015). Biostimulants and their role
in plant growth and stress alleviation. Plant Growth Regulation, 76(1), 1-15.
4.
Khan, A. L., Waqas, M., & Kang, S. M. (2014). Biostimulants for sustainable
agricultural production. Springer, 5(3), 283-295.
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International scientific-online conference
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5.
López-Bucio, J., Cruz-Ramírez, A., & Herrera-Estrella, L. (2015). The role of
biostimulants in plant growth. International Journal of Environmental Science
and Technology, 12(4), 211-220.
6.
Siva, R., Pandian, S. K., & Venkatesalu, V. (2016). Seaweed extracts and
their role in improving plant growth. Plant Growth Regulators, 1(1), 1-10.
7.
Tariq, M., Hussain, F., & Khan, S. (2017). Effects of amino acids and
biostimulants on the growth and yield of cotton. Agricultural Sciences, 8(9),
1179-1187.
8.
Uygur, V., Acar, Z., & Çolak, A. (2019). The effects of humic substances on
the growth and productivity of cotton. Science Progress, 102(2), 1-12.
9.
Zhao, H., Zhang, Y., & Xu, Z. (2017). Role of beneficial microorganisms in
plant growth and soil health. Plant and Soil Journal, 413(1), 1-12.
