1、Foliar Fertilizer Applications on Sweet Potato

All foliar fertilizer treatments resulted in higher sweet potato yield than the no foliar check. Ferti-Rain and ferti-Rain + Pro-Germinator provided the best yields, indicating that the crop needed both phosphorus and potassium, as well as some nitrogen and sulfur.

2、Effects of Foliar Fertilization: a Review of Current Status and Future

Chelated foliar fertilizers are effective for improving element utilization efficiency, crop yield, and quality. The physicochemical properties, molecular structure, chelating strength, and chelating rate of chelating agents modulate the effects of application of nutrients.

3、MODULATION OF THE GROWTH PERFORMANCE AND NUTRIENTS OF SWEET POTATO UPON

Abstract Fulvic acid (FA) can stimulate the growth of varying plants. Thus, this study investigated the effects of foliar application of FA on the growth of sweet potato (Ipomoea batatas L.) in field and greenhouse conditions.

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.

Effects of foliar Fe and Zn fertilizers on storage root Fe, Zn, and

Foliar sprays of iron (Fe) and zinc (Zn) fertilizers are effective in improving Fe and Zn concentrations in sweet potato.

Influence of Foliar Fertilization with Monopotassium

To determine the effect of foliar fertilization with monopotassium phosphate (MKP) on growth and yield of sweet potato, we analyzed plant growth, microbial communities by fatty acid methyl ester and chemical properties in soils from MKP 0 (control), 1, 2, 3, 4, and 5% treatments.

Glycine

Whether chelated Zn fertilizers can improve Zn concentration in edible roots of sweet potato while concomitantly avoiding apparent adverse effects deserves detailed study.

Effects of Bio and water

To verify an effective approach for alleviating problems associated with the consecutive monoculture of sweet potato, five fertilizer treatments were designed under plastic film-mulched, drip-fertigated conditions in fields continuously planted with sweet potato over five years.

Foliar selenate application enhance physiological, organic compounds

This study confirmed that foliar spray of organic nutrient solution with sodium selenate as the main source of Se fertilization was an effective strategy to enhance the physiological characteristics of sweet potato [32].

Sweet Potato Fertilizer Requirements and Recommendations: Management

Fish emulsion, bone meal, and potassium sulfate are effective fertilizers for sweet potatoes. Fish emulsion improves soil fertility, promotes healthy root development, and supports plant growth.

During sweet potato cultivation, foliar fertilization is a critical practice to enhance yield and quality. The choice of effective foliar fertilizers in the later stages depends on factors such as the growth phase, soil conditions, climate, and varietal characteristics of sweet potatoes. Below are some recommendations:

1. Selection of Foliar Fertilizers The following fertilizers are suitable for application in the late growth stage:

• Potassium dihydrogen phosphate (KH₂PO₄): A common nutrient supplement that promotes sturdy stems and improves disease resistance.
• Microelement fertilizers: Boron, zinc, iron, etc., which play vital roles in growth and quality improvement.
• Amino acid complex liquid fertilizer: Contains essential amino acids for plant growth, enhancing stress resistance and fruit quality.
• Seaweed extract: Rich in minerals and microelements, it boosts disease resistance and drought tolerance.

2. Timing of Application The optimal period for foliar fertilization is during the bulking stage, when sweet potatoes have increased nutrient demands. Foliar spraying rapidly replenishes nutrients, accelerating growth.

3. Application Method Use a sprayer to evenly apply the fertilizer on leaves. Avoid overapplication to prevent fertilizer burn. Apply on sunny, windless days, avoiding rain to prevent reduced efficacy.

4. Dosage Adjust dosages based on plant health and soil fertility:

• Potassium dihydrogen phosphate: 100–200 ml/mu (≈0.067 ha).
• Microelement fertilizers: 50–100 g/mu.
• Amino acid complex liquid fertilizer: 500–1,000 ml/mu.
• Seaweed extract: 100–200 g/mu. (Customize dosages according to specific conditions.)

5. Frequency Apply every 7–10 days. Excessive frequency may cause excessive vegetative growth, reducing yield.

6. Monitoring Effects Observe growth indicators like leaf color, plant height, and tuber size. Adjust strategies if over- or under-fertilized.

7. Precautions

• Avoid mixing with alkaline substances to prevent precipitation.
• Follow the principle of "small amounts, multiple applications" to minimize risks of fertilizer damage.

effective foliar fertilization in the late stage requires tailored fertilizer selection, proper application techniques, and timely adjustments to achieve optimal results.