1、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.

2、Sweet Potato Fertilizer Requirements and Recommendations: Management

Use a balanced fertilizer with an NPK ratio appropriate for sweet potatoes, incorporate organic matter, and use slow-release fertilizers for a steady supply. Apply fertilizer before planting or during early growth stages to ensure plants need them most.

3、12 Best Fertilizer For Sweet Potato [Organic & Inorganic]

In this article, we have compiled a list of the 12 best fertilizers for sweet potatoes that can help you achieve optimal growth and yield.

4、Sweet Potato Fertilization Requirements

According to studies, sweet potatoes remove, on average, from one hectare: 100 kg of N, 90 kg of P, and 200 kg of K and Ca (90, 80, 180 lbs. per acre respectively).

Agronomic performance of sweet potato with different potassium

Different doses of potassium-predominant fertilizer were applied to an orange flesh (Beauregard) and a purple flesh (Stokes Purple) varieties of sweet potatoes.

Best NPK fertilizer for sweet potato

After applying potassium fertilizer in the later stage can improve the yield and quality of sweet potatoes, but do not use chlorinated fertilizers for fertilization of sweet potatoes.

Growing Sweet Potatoes

Success in sweet potato production depends on proper field selection, tailored fertility programs, and efficient nutrient uptake—particularly potassium, which is required in higher quantities than nitrogen or phosphorus.

Horticulturae

Horticulturae | Free Full-Text | Effects of Various Potassium Fertilizer Dosages on Agronomic and Economic Assessment of Sweet Potato Fields | Notes

Long

Total potassium (TK), EK and NEK stocks in large and small-macroaggregates displayed positive effects on K uptake and yield for sweet potato. Pearson's correlation and random forest model analysis revealed that EK and NEK stock in large-macroaggregate were the most key factors for K uptake and yield of sweet potato under long-term fertilization.

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.

The price of potassium fertilizer for sweet potatoes varies depending on region, brand, and purchasing channels. In China, the cost typically ranges from a few yuan to dozens of yuan per jin. Below is a detailed analysis of factors influencing the pricing of potassium fertilizer for sweet potatoes:

1. Importance of Potassium Fertilizer for Sweet Potatoes

Sweet potatoes are a critical crop rich in dietary fiber, vitamins, minerals, and other nutrients beneficial to human health. their growth demands substantial nitrogen (N), phosphorus (P), and potassium (K). Imbalances or deficiencies in soil nutrients can significantly impact yield and quality. Proper potassium application is thus essential for optimizing both productivity and crop traits.

2. Cost Analysis of Potassium Fertilizer

a. Cost Factors

• Raw Material Prices: Potassium fertilizers are primarily derived from potassium chloride (KCl) or potassium sulfate (K₂SO₄). Prices fluctuate based on global supply-demand dynamics, transportation costs, and environmental policies. KCl is cheaper, while K₂SO₄—more water-soluble and crop-friendly—commands higher prices.
• Production & Processing Costs: Manufacturing involves investments in factories, equipment, energy (electricity, steam), and technology.
• Transportation & Logistics: Long-distance shipping increases costs, whereas rail or water transport reduces expenses.
• Taxes & Miscellaneous Fees: Sales taxes, packaging, and storage fees add to the final price.

b. Price Determinants

• Market Supply-Demand: Prices drop when supply exceeds demand and rise otherwise. Global market trends also affect domestic pricing.
• Raw Material Volatility: Fluctuations in KCl/K₂SO₄ prices directly impact fertilizer costs.
• Production Efficiency: Technological advancements and stricter environmental regulations may lower production costs.
• Government Policies: Subsidies, tax incentives, or price controls can alter market dynamics.

3. Price Range for Potassium Fertilizer

a. Tiered Pricing

• Low End: In economically disadvantaged regions, prices may hover around tens of yuan per jin due to lower input costs and productivity.
• Mid Range: In average urban/rural areas, costs span tens to over 100 yuan per jin, reflecting balanced production and logistics expenses.
• High End: Economically developed regions see prices exceeding 100–200 yuan per jin, driven by higher raw material costs and robust demand.

b. Price Fluctuations

• Seasonal Trends: Prices peak during planting seasons (higher demand) and dip otherwise.
• Regional Disparities: Wealthier regions generally have higher prices.
• Policy Impacts: Government subsidies or price caps can stabilize or inflate costs.

4. Recommendations

a. For Farmers

• Research Markets: Track price trends and supply conditions.
• Compare Brands: Evaluate products via labels, reviews, and performance metrics.
• Prioritize Long-Term Benefits: Choose high-quality fertilizers to enhance crop yields sustainably.

b. For Businesses

• Optimize Production: Adopt efficient technologies and eco-friendly practices to reduce costs.
• Build Brands: Strengthen reputations through quality and customer service.
• Expand Channels: Leverage e-commerce and digital marketing to reach broader audiences.

c. For Governments

• Rational Pricing Policies: Align prices with agricultural sustainability and farmer incomes.
• Subsidies: Offer financial aid to lower farmers’ input costs.
• Regulation: Enforce quality standards, combat counterfeits, and educate farmers on scientific fertilization.

The price of potassium fertilizer for sweet potatoes depends on raw materials, production, market forces, and policies. Farmers should balance immediate savings with long-term gains, businesses must innovate and diversify, and governments play a critical role in policymaking and market oversight. Collaborative efforts can ensure both high yields and superior crop quality.