1、Optimal Frequency for Applying Potassium Fertilizer to Sweet Potatoes

For the experiment area and rotation system, the appropriate management of K fertilizer is “all straw and vine returning + proper K fertilizer rate + all K fertilizer applied on sweet potato”.

2、Effects of Various Potassium Fertilizer Dosages on Agronomic and

To explore the effects of various potassium fertilizer dosages on sweet potatoes, field experiments were conducted in 2018 and 2019 using a randomized block design.

3、Long

Long-term fertilizer application contributed to higher yield, yield stability, and K uptake of sweet potato. NPK+PM and NPK+RS treatments both showed the best promoting effect on plant growth.

4、Effects of potassium application on yield and potassium balance of

Objectives Sweet potato is a potassium-loving crop, and its production relies heavily on K fertilizer application. This study was designed to integrate existing research results and quantitatively analyze the effects of K application on sweet potato yield and K balance.

5、The Effects of Different Potassium Fertilizer Application Rates on

Insufficient potassium application limits yield due to insufficient nutrient supply and the poor flavor of tubers; excessive potassium application leads to a slower increase in yield and a decrease in fertilizer utilization rate.

Effects of Nitrogen，Phosphorus and Potassium Application

Effects of Nitrogen，Phosphorus and Potassium Application Methods and Rates on Agronomic Traits and Yield of Sweet Potato [J]. Journal of Henan Agricultural Sciences, 2022, 51 (11): 21-34.

Effects of Various Potassium Fertilizer Dosages on Agronomic and

Based on factors such as sweet potato yield and starch content, the recommended amount of potassium fertilizer was 200 kg ha−1, which has significant economic benefits and theoretical value.

Effect of reducing nitrogen and potassium application on yield and

Double factor randomized block experimental design was adopted with three levels of nitrogen and potassium applied in this study. The conventional N application rate was 126.00 kg hm -2 (A1), the N application rate was reduced by 10% (A2) and 20% (A3), respectively.

Optimal Timing for Potassium Fertilizer Application in Sweet Potato

A field experiment was conducted to investigate the impact of seven different K fertilizer (K2O) application rates on sweet potato storage root yield, tissue K concentration, and economic implications in Mississippi.

Sweet Potato Fertilizer Requirements and Recommendations: Management

Sweet potato cultivation requires adequate potassium (K) fertilization to ensure optimal growth and yield. Potassium is another essential nutrient that plays a crucial role in various physiological processes of the sweet potato plant.

Sweet potatoes are a nutrient-rich agricultural product with high demands for potassium during their growth. Potassium fertilizer promotes growth, increases yield, and enhances quality. excessive use can lead to seedling damage or soil degradation.

The question of "how much potassium fertilizer per jin of sweet potatoes is appropriate?" depends on factors such as growth stages, soil fertility, and climate. Generally, 0.5–1 kilograms of potassium fertilizer is recommended per jin of sweet potatoes. Adjustments should be made based on:

• Soil fertility: Poorer soils may require higher doses.
• Climate conditions: Adverse weather necessitates increased application.
• Growth stages:
  • Early stage (1–2 months after planting): Higher potassium boosts growth.
  • Late stage (1 month before harvest): Reduce potassium to avoid compromising taste and quality.

Types of Potassium Fertilizers

1. Potassium chloride (KCl): Cost-effective and easily absorbed.
2. Potassium sulfate (K₂SO₄): More expensive but improves water retention and pest resistance.
3. Potassium nitrate (KNO₃): Enhances absorption and soil health.

Key Guidelines for Application

1. Timing:

   • Apply primarily during the first 2 months after planting.
   • Cease or reduce application 1 month before harvest.

2. Method:

   • Spread evenly around plants, avoiding direct root contact.
   • Do not mix with nitrogen fertilizers to prevent reduced effectiveness.

3. Dosage:

   • Typical rate: 10–20 kg per mu (approx. 0.06–0.13 hectares) of KCl.
   • Adjust based on soil and climate conditions.

4. Frequency:

   • Increase applications during early growth phases.
   • Reduce frequency near harvest.

5. Precautions:

   • Avoid overapplication to prevent salt buildup or crop damage.
   • Tailor fertilizer type to soil needs (e.g., sulfate for acidic soils).

Balancing potassium usage requires consideration of growth stages, soil, and climate. Proper timing, dosage, and fertilizer selection ensure both high yields and premium quality. Always test soil and adjust practices accordingly.