1、Maximising cotton phosphorus utilisation for zero surplus and high

Can optimization of phosphorus input lead to high productivity and high phosphorus use efficiency of cotton through maximization of root/mycorrhizal efficiency in phosphorus acquisition?

2、Drip Irrigation of Phosphorus Fertilizer Enhances Cotton Yield and

To identify optimal P fertilization strategies, a consecutive two-year field experiment (2023–2024) under mulched drip irrigation was conducted. Three P application methods were tested: no P (CK), basal P application (PB), and drip P application (PD).

3、Phosphorus fertilizer recommendation based on minimum

Applying P based on P demand for target cotton yields maintained soil available P concentrations at a critical level and resulted in nearly 100% utilization of P fertilizer. This P management strategy is economic, environmentally responsible, and sustainable for cotton production.

4、Phosphorus High

The plant-available soil phosphorus rate and methods for applying phosphatic fertilizer and soil P-fixation capacity are critical factors for lower cotton productivity in Southern Punjab,...

5、Predicting and Optimizing Cotton Yield and Nitrogen

On these bases, the theoretical optimal fertilization treatment is verified in the field in the second year, providing theoretical guidance for cotton growth nutrient diagnosis and balanced fertilization, and achieving fertilizer reduction and efficiency improvement.

Phosphorus uptake mechanisms associated with phosphorus application

This study helps provide theoretical and technical support for improving cotton phosphorus efficiency, guiding scientific fertilization, breeding new cotton varieties with high phosphorus efficiency, and improving cotton production and planting resources.

Drip Irrigation of Phosphorus Fertilizer Enhances Cotton Yield and

To identify optimal P fertilization strategies, a consecutive two-year field experiment (2023–2024) under mulched drip irrigation was conducted. Three P application methods were tested:...

Optimal phosphorus proportion increases cotton yields in low nitrogen

To elucidate the physiological mechanism of optimal phosphorus (P) proportion under reduced nitrogen (N) environments on cotton yield, dry matter (DM) spatiotemporal distribution, and N utilization.

Effects of drip application of phosphorus fertilizer on soil

Soil P content, inorganic P content in different forms, soil P adsorption-desorption characteristics, P use efficiency, and seed cotton yield of different treatments were compared and analyzed.

Optimizing Phosphatic Fertilizer Drip Timing to Improve Cotton

To improve cotton yield in salinized arid fields, excess salt is removed and phosphorus content is increased. Adjusting phosphate fertilizer timing with water and fertilizer reduces phosphorus binding with calcium ions.

Cotton is one of the world's most important cash crops, providing abundant textile raw materials for humanity while profoundly impacting multiple links in the agricultural industry chain. During its growth cycle, proper application of phosphorus fertilizer is critical, as it effectively promotes cotton development, increases yields, and enhances quality. Below is a detailed introduction to the best practices for phosphorus fertilization in cotton cultivation.

I. Understanding Cotton’s Phosphorus Requirements

Cotton’s demand for phosphorus peaks during the flowering and boll formation stages, which are critical periods requiring substantial phosphorus to support physiological activities. phosphorus fertilization should be concentrated during these phases.

II. Selecting the Right Type of Phosphorus Fertilizer

1. Diammonium Phosphate (DAP): A common phosphorus fertilizer suitable for various soil conditions. it should be paired with potassium fertilizers to avoid nutrient imbalances.
2. Superphosphate: High in phosphorus content but less stable in efficacy. Dosage control is essential during application.
3. Calcium Hydrogen Phosphate: Ideal for acidic soils, providing steady phosphorus release but with slower effects.
4. Phosphate Salts: Organic phosphorus fertilizers with gentle effects, suitable for long-term or continuous applications.

III. Timing of Fertilization

1. Basal Application: Spread phosphorus fertilizer evenly on the soil surface during land preparation, followed by plowing to integrate it thoroughly. Suitable for large-scale planting, but caution is needed to prevent root burn.
2. Topdressing: Apply small amounts of phosphorus fertilizer during different growth stages, such as bud formation, early flowering, and peak flowering. This ensures timely phosphorus supplementation but requires careful dosage to avoid over-fertilization.

IV. Balancing with Other Fertilizers

1. Nitrogen Fertilizers: Combining phosphorus with nitrogen enhances phosphorus utilization efficiency. excessive nitrogen may disrupt cotton’s normal growth.
2. Potassium Fertilizers: Pairing phosphorus with potassium improves disease resistance and root development. excessive potassium can elevate soil osmotic pressure, hindering nutrient absorption.

V. Controlling Fertilization Rates

1. Basal Dose: Based on soil tests, cotton varieties, and growth stages, apply 5–10 kg/mu of DAP or superphosphate.
2. Topdressing Dose: Adjust according to growth conditions and soil fertility. Typically, apply 5–10 kg/mu during bud formation, early flowering, and peak flowering.

VI. Application Methods

1. Ditch Application: Spread phosphorus evenly, then deep plow to integrate it. Suitable for large fields, but avoid direct root contact with concentrated fertilizer.
2. Hole Application: Dig holes around plants, place fertilizer inside, and cover with soil. Ideal for small plots or irregular terrain.

VII. Post-Fertilization Management

1. Irrigation: Water immediately after fertilization to dissolve nutrients and reduce root-burn risks.
2. Soil Loosening: Aerate the soil to improve aeration and water retention, promoting root growth.
3. Pest Control: Monitor cotton health post-fertilization and address pest/disease issues promptly.

phosphorus fertilization for cotton is a systematic process that depends on growth stages, soil conditions, and environmental factors. Scientific application methods and balanced dosages maximize yields and quality. Post-fertilization management and pest control are equally vital to ensuring healthy cotton growth.