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、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.

3、Cotton cultivar response to potassium fertilizer under irrigated and

Cotton plant height was positively correlated with SMU, especially LSCL, reaching 60–110 cm on average, in both irrigated and rainfed conditions. Cotton lint yield, fiber quality, and leaf K concentration responded to K and irrigation, and these responses were SMU specific.

4、2019 Can Urea and Potassium Fertilizer (23

The fertilizer, a blend of urea and muriate of potash, was broadcast at a rate of 100 pounds per acre, 50 lb urea + 50 lb potash. The treatments were applied using a JD 6000 Hiboy equipped with a spreader.

Potassium Nutrition of Cotton Growth, Yield, and Fiber Quality

It has been determined that only about 10 pounds per acre of potassium nitrate or potassium sulfate per weekly application beginning the third week of flowering can be applied safely (Oost-erhuis et al., 1991; Howard et al., 1998).

POTASH FERTILIZERS:

On-farm experiments conducted at Nagpur, Maharashtra, showed that seed cotton yield increased up to 22% due to potash fertilizer use in recommended rates. Potash application to modern cotton varieties was efficient even on soils with high content of exchangeable potassium.

Effects of potassium application on growth, yield, and quality of

The specific objective of the study was to determine the effect of potassium fertilizer application rates on plant height, canopy width, yield, and fiber quality in South Texas rainfed cotton cultivars with varying growth habits.

Relationship of tissue potassium content with yield and fiber quality

Impact of soil and/or foliage applied potassium fertilizer on number of bolls per plant, boll weight and seed cotton yield. Column shows the mean of replicates, whereas bars show the standard error.

Efficacy of fertilizing method for different potash sources in cotton

Abstract Precise choice of potassium (K) source and application method does matter for its cost-effectiveness. This study was aimed to evaluate the best source and method of K fertilizer application to improve cotton productivity and profitability under an arid climate.

Cotton cultivar response to potassium fertilizer under irrigated and

Cotton plant height was positively correlated with SMU, especially LSCL, reaching 60–110 cm on average, in both irrigated and rainfed conditions. Cotton lint yield, fiber quality, and leaf K concentration responded to K and irrigation, and these responses were SMU specific.

Cotton drip seedling is a traditional cotton nursery method that delivers water and nutrient solutions directly to the roots of cotton seedlings via a drip irrigation system, promoting their growth. The use of potassium fertilizer is critical in this process, as potassium is an essential element for plant growth, playing a key role in enhancing disease resistance, improving root development, and increasing yield.

I. Importance of Potassium Fertilizer in Cotton Drip Seedling

1. Promotes Root Development: Potassium fertilizer increases soil salinity, improving soil permeability and water retention. This helps roots absorb water and nutrients more efficiently, fostering robust root growth and expansion.

2. Enhances Crop Resilience: Potassium strengthens disease resistance, reduces the incidence of pests and diseases, and improves overall stress tolerance, enabling crops to thrive in adverse environmental conditions.

3. Improves Fruit Quality: Potassium enhances fruit quality by thickening peels, improving color, and refining taste, thereby increasing the economic value of cotton.

4. Optimizes Growth Cycle: Proper potassium application ensures consistent growth throughout the cotton lifecycle, leading to higher yields.

5. Conserves Water Resources: The high efficiency of drip irrigation allows effective use of potassium with minimal water waste, reducing resource consumption.

II. Dosage of Potassium Fertilizer per Mu

Based on research and field experience, the recommended dosage of potassium fertilizer for cotton drip seedling is 10–20 kilograms per mu. Adjustments should be made according to soil conditions, climate, and cotton varieties.

III. Types and Application Methods of Potassium Fertilizer

1. Types of Potassium Fertilizer: Common options include potassium sulfate, potassium chloride, and potassium nitrate. Potassium sulfate and potassium chloride are widely used due to their high solubility and ease of absorption by plants.

2. Timing: Apply potassium fertilizer early, within 7–10 days after seeding, to provide essential nutrients for rapid seedling growth.

3. Methods:

   • Drip Irrigation: Dissolve potassium fertilizer in water and deliver it via the irrigation system.
   • Broadcast Spreader: Sprinkle fertilizer over soil before irrigation.
   • Organic Mix: Combine potassium fertilizer with organic matter for enhanced nutrient release.

4. Proportion: Avoid overapplication (>20 kg/mu) to prevent soil salinization. Maintain balanced nutrient ratios with other fertilizers (e.g., nitrogen, phosphorus).

IV. Key Considerations and Recommendations

1. Soil Conditions: Assess soil pH, organic matter, and water-holding capacity to select suitable potassium sources.

2. Climate: In dry regions, increase potassium to offset water scarcity; in humid areas, reduce dosage to avoid salt buildup.

3. Application Frequency: Use targeted, controlled doses to maximize efficiency and minimize environmental impact.

4. Integrated Fertilization: Pair potassium with nitrogen and phosphorus for optimal nutrient uptake and crop performance.

the dosage of potassium fertilizer for cotton drip seedling should be tailored to soil, climate, and crop specifics. Prioritize balanced application, avoid excess, and integrate with other nutrients to achieve sustainable yields and resource efficiency.