1、Optimizing potassium management for enhanced cotton yields in China's

Optimal K fertilizer rates and planting densities for three cotton zones are proposed. Potassium (K) plays a crucial role in the growth and yield of cotton. As the world's leading cotton-producing country, China faces challenges such as soil K depletion and rising costs of K fertilizers.

2、Potassium Management of Cotton

Although predictions of cotton fertilizer requirements are usually based on the nutrient concentration in the soil sample analyzed, the expected yield level should also be taken into consideration when determining the amount of fertilizer K to apply to the soil.

3、Fertilizer dose in cotton and timing of application

Conclusion: Proper fertilizer management is essential to optimize cotton crop yields and sustain the health of the soil. Accurate soil testing, analysis, and consultation with local agricultural experts are fundamental in determining the appropriate fertilizer dose for cotton cultivation.

Impact of active root zone soil potassium levels on cotton yield and

This study aimed to investigate the response of cotton yield and quality to different soil potassium levels, to try to clarify the suitable soil potassium levels for cotton growth, so as to provide practical and effective help for determining the amount of potash fertilizer in the cotton field.

Cotton Plant Fertilizer Requirements

As a first rule of thumb, cotton plant consumes Nitrogen (N) at a double quantity compared to Phosphorus (P) and Potassium (K). Consequently, a N-P-K 20-10-10 fertilizer is more suitable, if a soil analysis is impossible.

(PDF) Potassium Fertilization of Cotton

Understanding K distribution, deficiency symptoms, and appropriate fertilization practices, including soil testing and foliar application, is essential for maintaining optimal K levels and preventing yield losses. The present study was carried out at the farm of Krishi Vigyan Kendra, Sirsa.

Potassium Fertilizer Management in Cotton

This presentation reviews the “4 R’s” of fertilization, diseases related to potassium deficiency, potassium recommendations for cotton based on yield goals, the cost of fertilization, and foliar application of potassium, among other topics.

NUTRITIONAL GUIDELINES FOR POTASSIUM IN COTTON

During mid-season growth, potassium accumulation may approach 7 pounds per acre per day. To maintain soil potassium at sufficient levels, it is usually necessary to supplement cotton with additional sources of potassium.

Best Fertilizer for Cotton: Complete Growing Guide

Discover the best fertilizer for cotton and maximize your yields with my expert guide. Learn essential nutrients, application timing, and proven techniques for healthy cotton plants

Impact of active root zone soil potassium levels on cotton yield and

This study aimed to investigate the response of cotton yield and quality to different soil potassium levels, to try to clarify the suitable soil potassium levels for cotton growth, so as to provide practical and effective help for determining the amount of potash fertilizer in the cotton field.

Cotton is one of the world's most important cash crops, and its yield and quality are influenced by various factors such as soil fertility, climatic conditions, and irrigation management. Potassium fertilizer, an indispensable nutrient for cotton growth, plays a crucial role in enhancing both the yield and quality of cotton. Below is a detailed guide on the application rate and methods of potassium fertilizer for cotton, aimed at providing valuable reference for cotton growers.

I. Application Rate of Potassium Fertilizer for Cotton

1. Recommended Dosage: According to the "Agricultural Industry Standard of the People's Republic of China — Fertilizer" (NY/T 394-2025), the recommended dosage of potassium fertilizer for cotton is 50-75 kilograms of potassium sulfate compound fertilizer per mu. This recommendation accounts for variations in soil types and cotton varieties across different regions, ensuring that cotton receives an adequate supply of potassium.

2. Adjustments Based on Actual Conditions: The actual application rate should be adjusted according to soil test results, cotton variety characteristics, and prevailing climatic conditions. If the soil has low potassium content, the dosage may be increased; conversely, it may be reduced. Additionally, the growth stage and developmental period of cotton must be considered, as potassium requirements vary throughout the plant's lifecycle.

3. Timing of Application: Cotton's demand for potassium changes at different growth stages. Generally, the flowering and boll-forming stage (from flowering to pre-boll formation) is critical for potassium uptake. Applying potassium fertilizer during this period promotes photosynthesis and nutrient accumulation, thereby improving yield and quality. Thus, fertilization should coincide with this key phase.

II. Fertilization Methods

1. Base Fertilization: Base fertilizer provides essential nutrients during the early growth stages of cotton. The proportion of potassium should not be excessive to avoid disrupting the balance of other nutrients. It is advisable to evenly spread a certain amount of potassium sulfate compound fertilizer during land preparation, combined with organic fertilizers to enhance soil water retention, fertility, and structure.

2. Topdressing: During cotton growth, especially in the flowering and boll-forming stage, supplemental potassium is needed through topdressing. Methods include foliar spraying and soil application. Foliar spraying, a convenient method, delivers potassium directly to all parts of the plant via a nutrient solution, maximizing efficiency. Soil topdressing involves mixing potassium fertilizer with other nutrients and applying it to the root zone. Care must be taken to control the amount and frequency to prevent soil salinization and nutrient loss.

3. Rational Combination: When fertilizing, consider pairing potassium with other nutrients. For example, combine potassium sulfate with nitrogenous fertilizers like ammonium phosphate or urea to meet cotton's nutritional needs at different stages. Additionally, incorporating micronutrients such as boron, zinc, and iron can improve disease resistance and stress tolerance.

III. Precautions

1. Soil Testing: Before applying potassium fertilizer, conduct a soil test to determine potassium levels, pH, and other nutrient statuses. This ensures precise fertilization, preventing over or under-application.

2. Environmental Factors: Cotton growth is influenced by temperature, humidity, and sunlight. These factors can affect potassium absorption and utilization. Monitor weather patterns and adapt fertilization practices accordingly to mitigate adverse environmental impacts.

3. Pest and Disease Management: While potassium enhances yield, quality, and pest resistance, excessive use can lead to soil potassium accumulation, affecting microbial activity and ecological balance. Balance fertilization with integrated pest management strategies.

the application rate and method of potassium fertilizer for cotton should be tailored to soil tests, cotton varieties, and climatic conditions. Adherence to scientific guidelines ensures balanced nutrient supply, optimizing cotton yield and quality. With proper fertilization management and technical expertise, farmers can achieve better economic returns.