1、The influence of source and timing of nitrogen fertilizers on yield and

The differences in N utilization by different sweet potato cultivars suggest the following: (1) optimum yields can be obtained with less N if timing and cultivar response are incorporated into N fertilization practices; and (2) over-fertilization of sweet potato with consequent loss of residual N in sandy soils could be prevented if the N use efficiencies of cultivars were known and taken into ...

2、Yield, nutrition, and nitrogen use efficiency of sweet potato in

For this reason, it is advisable to use nitrogen fertilization in sweet potato cultivation, considering the priority of the economic and efficiency use variable regarding the maximum technical efficiency.

3、Yield and Nitrogen Use Efficiency of Sweet Potato in Response to Cover

The N rates for the optimum root yield of sweet potato were 49.6 and 76.6 kg N ha −1 when grown after legume and non-legume species. In tropical conditions, the use of legumes as cover crops reduced the need for mineral N fertilizers by up to 35.2% for sweet potato.

4、Impacts of nitrogen fertilization and planting date on the physiology

Our results collectively demonstrate that the growth and productivity of sweet potato is strongly dependent on the length of the growing season, and can be further constrained by utilization efficiency of N. We conclude that future research should focus on optimum sweet potato cultivation technologies at Northern latitudes.

(PDF) Nitrogen Rate and Application Timing Affect `Beauregard

These authors found that, for sweet potato grown in sandy soil of low fertility and with previous cultivation of nonlegume crops, the optimal rate of N is 76.6 kg ha -1 ; however, if the sweet ...

The influence of source and timing of nitrogen fertilizers on

The influence of source and timing of nitrogen fertilizers on yield and nitrogen use efficiency of four sweet potato cultivars,Agriculture, Ecosystems & Environment - X-MOL

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.

Impacts of nitrogen fertilization and planting date on the physiology

Global warming causes plant stress and reduces crop productivity. Cultivation of the warmer region crop sweet potato (Ipomoea batatas (L.) Lam) in Northern regions can be an opportunity to benefit from climate warming, but there is little information of how growing season length interacts with agricultural practices such as nitrogen (N) fertilization. We studied the photosynthetic ...

Fertilizing Sweet Potatoes: How, When, and What to Use

Sweet potatoes are a rewarding crop to cultivate, offering a flavorful and nutritious harvest. Proper fertilization is key to maximizing their yield and quality, as these root crops have distinct nutrient requirements. Sweet Potato Nutrient Needs Sweet potatoes require a balanced approach to macronutrients for optimal development. Nitrogen (N) promotes leafy growth, phosphorus (P) supports ...

Nitrogen fertilizer rate and timing of application for potato under

In addition, different N fertilizer strategies, including application timing and rate, were tested within each irrigation method with the objective to determine the optimum N fertilizer timing of application and rates for potato.

Sweet potato (also known as Ipomoea batatas) is an important food crop and vegetable that requires significant nitrogen during its growth. Nitrogen fertilizer, a critical nutrient for plant development, plays a key role in enhancing sweet potato yield and quality when applied appropriately. Below are recommendations for the timing and methods of nitrogen fertilization:

1. Preparation Before Fertilization

• Soil Testing: Conduct soil analysis before fertilization to determine nitrogen levels, pH, and microbial activity. This helps calculate the required nitrogen dosage and select suitable fertilizer types.

• Growth Stages of Sweet Potato: Sweet potato growth分为 three stages: seedling stage, vegetative growth stage, and maturity stage. Nitrogen requirements vary by stage. Seedling and vegetative stages demand the most nitrogen, accounting for 60%-70% of annual fertilization.

2. Timing of Fertilization

• Seedling Stage: During the first year of planting, focus on root development. Apply the first topdressing 30-40 days after planting to provide essential nutrients for early growth.

• Vegetative Growth Stage: As plants expand rapidly, nitrogen demands increase. Fertilize every 10-15 days during this period to support healthy growth and improve yield.

• Maturity Stage: Apply final topdressing one month before harvest to promote sugar accumulation and enhance sweet potato quality.

3. Fertilization Methods

• Base Fertilizer: Prior to planting, apply nitrogen-rich base fertilizer to the soil surface to support early root development.

• Topdressing: Use foliar sprays or soil applications (e.g., drip irrigation, hole application) to supplement nitrogen during growth. Adjust frequency based on plant conditions and soil moisture.

• Combine with Organic Fertilizers: Integrate organic materials like chicken manure or cow dung, which provide balanced nutrients alongside nitrogen.

4. Key Considerations

• Avoid Over-Fertilization: Excessive nitrogen can cause excessive foliage growth, reducing yield and quality. Control dosage strictly.

• Monitor Soil Moisture: Prevent nutrient loss or root burn by avoiding over-irrigation. Ensure soil remains moist but not waterlogged.

• Adjust Plans Flexibly: Modify fertilization schedules based on plant health and soil conditions. Address deficiencies promptly to ensure robust growth.

rational nitrogen management is vital for sweet potato cultivation. By timing fertilization to match growth stages, combining organic and inorganic fertilizers, and avoiding excesses, farmers can optimize yields and quality while maintaining soil health.