1、The optimum application amount and ratio of nitrogen, phosphorus, and

Objectives This study aimed to investigate the optimum combination of nitrogen (N), phosphorus (P), and potassium (K) fertilizers for the growth and effective component accumulation of Astragalus membranaceus var. mongholicus in northern Shaanxi.

2、肥料种类及其不同施用方式对黄芪有机生产的影响

In order to explore the optimal fertilization technology for the organic production of Chinese medicinal materials， Astragalus membranaceus， a native medicinal material in Shanxi Province， was studied in Lingqiu County， Shanxi Province.

3、Foliar Feeding

Foliar feeding is defined as the application of liquid fertilizer directly to the leaves of plants, allowing for the absorption of essential nutrients like potassium, phosphorous, and nitrogen through the epidermis and stomata, thereby enhancing growth and increasing crop yield.

Foliar Fertilization: Novel Approaches and Field Practices

Optimal growth is associated with better crop health, competitiveness, and greater tolerance to various biotic and abiotic stresses. Furthermore, plant nutrition provides optimal conditions for growth and development, making it an important part of an integrated pest management strategy.

Guide to Foliar Fertilization: Best Practices, Dosages, and Benefits

This guide provides a detailed overview of recommended application concentrations, key benefits, crop-specific usage, and technical considerations for successful foliar fertilization in agricultural practice.

Study on the optimization models of nitrogen,phosphorus

Study on the optimization models of nitrogen,phosphorus and potassium application for Astragalus membranaceus production - 百度学术

Foliar Fertilizer Application Technology: Precision Application Guide

This article will comprehensively analyze the core technologies of foliar fertilizer application from basic principles to practical key points, providing scientific guidance for agricultural producers.

(PDF) Relative Assessment of Fertilizer Application Techniques for

Enhancing fertilizer application strategies is a critical lever for addressing the multidimensional challenges confronting modern agriculture, including food security, resource...

Best Fertilizer for Astragalus

Liquid fertilizers offer versatility; dilute them and apply directly to the soil or use as a foliar spray for quick absorption. Foliar application is particularly effective, allowing nutrients to be taken up rapidly through the leaves.

Foliar Fertilizer Application Guide Farming: When & How to Apply

Apply foliar fertilizers 2-4 times per season during active growth stages, spacing applications 10-14 days apart and focusing on critical periods like early vegetative growth and reproductive stages for maximum benefit.

Astragalus, scientifically named Astragalus membranaceus (Fisch.) Bge., is a perennial herbaceous plant belonging to the genus Astragalus in the legume family. Widely used in traditional Chinese medicine and health products, it is valued for its abilities to tonify qi, consolidate the exterior, promote diuresis, and reduce swelling. In agricultural production, Astragalus is also an important economic crop, and foliar fertilization can effectively enhance its growth rate and yield. Below are detailed guidelines for applying foliar fertilizer to Astragalus:

I. Selecting Foliar Fertilizer

1. Understanding Nutrient Composition: Before selecting foliar fertilizer, familiarize yourself with its primary components, such as nitrogen (N), phosphorus (P), potassium (K), and microelements. These nutrients are critical for Astragalus growth. For example, nitrogen promotes leaf development, phosphorus supports root growth, and potassium enhances disease resistance.
2. Review Product Instructions: Carefully read the usage guidelines, dosage recommendations, application methods, and precautions. Different fertilizers may have specific optimal timing or conditions, so adherence to instructions is crucial.
3. Choose Reputable Brands: Opt for well-established brands to ensure product quality and stability, minimizing risks associated with inferior formulations.

II. Preparing Foliar Fertilizer

1. Dilute the Solution: Follow the manufacturer’s guidelines to dilute the fertilizer to the recommended concentration. Avoid overconcentration, which may damage plants. Use clean water during dilution to prevent contamination.
2. Inspect Equipment: Check containers for leaks or damage before use. Replace any compromised packaging to avoid spillage or reduced effectiveness.
3. Select Spraying Tools: Choose appropriate spraying equipment (e.g., manual or electric sprayers) based on plant size and leaf area. Adjust nozzle angles and distances to ensure even coverage.

III. Applying Foliar Fertilizer

1. Timing by Growth Stage:
   • Seedling Stage: Use growth-promoting fertilizers.
   • Flowering Stage: Apply flowering-enhancing formulas.
   • Fruiting Stage: Opt for fruit-retention fertilizers. Adjust fertilizer types according to the plant’s developmental needs.
2. Uniform Application: Spray evenly across all plant parts, moving from top to bottom. Use wind direction and speed to guide application, avoiding drift or runoff.
3. Safety Measures: Wear protective gear (gloves, masks) to prevent skin or respiratory exposure. Ensure safe practices to avoid environmental contamination or accidental hazards.

IV. Monitoring Plant Response

1. Observe Growth: Track changes such as accelerated growth, greener leaves, or abnormalities. Address issues promptly if they arise.
2. Record Data: Document key metrics (e.g., growth rate, leaf quantity/quality) to evaluate fertilizer efficacy and inform future applications.
3. Adjust Strategies: Modify fertilization plans based on observations. Switch formulas if results are suboptimal, while remaining vigilant for adverse reactions.

V. Key Considerations

1. Avoid Overapplication: Excessive use may lead to toxicity or stunted growth. Adhere strictly to recommended doses.
2. Prevent Direct Contact: Apply diluted solutions via sprayers or mix with soil to minimize plant damage.
3. Weather Awareness: Suspend spraying during harsh weather (e.g., strong winds, rain) and ensure proper ventilation indoors.
4. Rotate Formulas: Alternate fertilizer types regularly to provide balanced nutrition and prevent nutrient imbalances.
5. Environmental Protection: Prevent runoff into water bodies and minimize impacts on surrounding ecosystems.

rational fertilization is vital for Astragalus cultivation. By following these steps and precautions, foliar fertilization can significantly improve growth efficiency and yield, contributing to agricultural productivity.