1、(PDF) Calcium Fertilization in Peanuts: Importance, Sources, and

This article examines the sources of calcium, application rate and timings of these sources, and their effect on peanut growth. The purpose of this article is to share knowledge about...

2、Seasonal differences in yield and fertilizer use efficiency of

Thus, this study evaluated the effects of timing and splitting Ca applications on the dry matter accumulation and partition, fertilizer use efficiency, and yield of different low-Ca-tolerant peanut varieties (low-Ca-sensitive Jihua 16 and low-Ca-tolerant Yueyou 45) in the early and late seasons.

3、Increasing Calcium and Decreasing Nitrogen Fertilizers Improves Peanut

Previous study has demonstrated that nitrogen fertilization applied 10 weeks after planting had minimal effects on the shoot and root–rhizome biomass [13].

4、The UGA Peanut Fertilization Strategy … In a Nutshell

However, all seed peanuts should automatically receive 1000 lb/a gypsum (calcium sulfate) at early bloom and a lot of gypsum is applied “just in case” or as “insurance”.

5、The Rhizobium and calcium fertilizer application to peanut plant in dry

This research was conducted to determine the effect of the application of Rhizobium (Nodulin) and calcium fertilizers on growth and yield of peanut plants in dry land.

Guide to Fertilizing Your Peanut Plant

Apply the fertilizer in a band along each row, keeping it about 2-3 inches away from the base of the plants. Be mindful not to overapply nitrogen, as excessive amounts can lead to excessive vegetative growth and delay flowering.

Calcium Q & A

In unusually dry years, peanuts may show symptoms of calcium deficiency, even when recommended rates of gypsum are applied. Overall, gypsum application is better early than late.

Fertilization of Peanut (Arachis hypogaea L.) with Calcium: Influence

Fertilization of Peanut (Arachis hypogaea L.) with Calcium: Influence of Source, Rate, and Leaching on Yield and Seed Quality by Robert Jason Florence

Calcium Fertilization in Peanuts: Importance, Sources, and

Applying calcium chloride and calcium thiosulfate through center pivot at the rate of 25 lb/acre during bloom has been shown to enhance yield and seed germination of peanuts (Harris and Beasley 2012).

Uptake and timing of calcium in runner peanut

Since requirements of Ca for optimal pod yield are considerably higher than those required for vegetative growth (Comber, 1959, Wolt and Adams, 1979), information regarding Ca uptake pattern of peanut pods is valuable for determining optimal timing for different Ca supplements.

Peanuts are one of the world's most important oil crops, and their yield and quality are significantly influenced by soil fertility, climatic conditions, and fertilization practices. Calcium fertilizer plays a critical role in peanut growth and development. Proper application can enhance growth, increase yields, and improve quality. Below are recommendations for the best timing to apply calcium fertilizer to peanuts:

I. Basic Principles of Calcium Fertilizer Application

1. Balanced Fertilization: Fertilization should align with the nutrient demands of different growth stages, ensuring a balanced ratio of essential elements. Calcium fertilizer should be integrated with major nutrients like nitrogen (N), phosphorus (P), and potassium (K) for optimal results.

2. Optimal Timing: The effectiveness of calcium fertilizer depends on its application timing. Generally, it should be applied during early or mid-growth stages to promote root development and overall plant health.

3. Proper Dosage: Excessive calcium can disrupt nutrient balance, while insufficient amounts may hinder growth. The dosage should be determined based on soil tests and crop requirements.

4. Environmental Considerations: Factors such as soil pH and climate affect calcium uptake. Calcium is more readily absorbed in acidic soils, while alkaline soils require careful selection of calcium fertilizer types.

5. Avoid Heavy Metal Contamination: When using calcium-containing fertilizers, ensure they do not come into contact with heavy metal-contaminated soils to prevent pollution.

II. Ideal Timing for Calcium Fertilizer Application

1. Germination Stage: Within the first two weeks after planting, peanuts enter a critical germination phase. Although root systems are not fully developed and nutrient demands are low, moderate calcium supplementation supports early root growth.

2. Tillering Stage: During tillering, roots expand, and nutrient demands increase. This is the optimal period for calcium application, as it promotes robust root and stem development.

3. Flowering Stage: High nutrient demand during flowering makes calcium crucial for improving pollination rates and fruit quality.

4. Maturation Stage: While nutrient needs decline during maturation, light calcium application can enhance fruit firmness and storage longevity.

III. Types and Application Methods of Calcium Fertilizers

1. Lime (Calcium Oxide/Hydroxide): Commonly used in acidic soils. Dilute properly to avoid root burn.

2. Calcium Chloride: A white, water-soluble crystalline solid. Suitable for acidic and neutral soils; avoid in alkaline soils.

3. Gypsum (Calcium Sulfate): A white, water-soluble powder. Effective in acidic and neutral soils; not recommended for alkaline soils.

4. Calcium Oxide: A white, hygroscopic, and corrosive solid. Handle with care to avoid skin contact.

5. Calcium Carbonate: A white, water-soluble powder. Suitable for acidic and neutral soils; avoid alkaline soils.

6. Calcium Phosphate: A white, water-soluble crystalline substance. Used in acidic and neutral soils; not for alkaline soils.

7. Calcium Nitrate: A white, water-soluble crystalline compound. Suitable for acidic and neutral soils; avoid alkaline soils.

8. Chelated Calcium: A micronutrient-rich chelate that improves calcium uptake efficiency. Suitable for acidic and neutral soils; avoid alkaline soils.

9. Bio-Calcium: A microbially fermented organic calcium fertilizer that enhances soil fertility. Suitable for acidic and neutral soils; avoid alkaline soils.

10. Alginic Calcium (from Seaweed): A natural calcium extract with high nutritional value and water-retention properties. Suitable for acidic and neutral soils; avoid alkaline soils.

11. Fulvic Calcium: A humus-rich, organic matter-based fertilizer that boosts soil health. Suitable for acidic and neutral soils; avoid alkaline soils.

12. Calcium Silicate: An inorganic fertilizer derived from silicate minerals. Improves soil fertility; suitable for acidic and neutral soils.

Key Considerations:

• Soil pH determines efficacy (e.g., lime for acidic soils).
• Follow dosage recommendations based on soil tests.
• Avoid over-application to prevent nutrient imbalance.