1、Application of Chemical Fertilizers and Plant Spacing Improves Growth

Results: The results show that nitrogen and plant spacing significantly affected the vegetative growth of R. glutinosa in which N application of 240 kg ha –1 and plants arranged in 20×30 cm spacing brought the highest growth characters while P application showed little difference in canopy diameter.

2、(PDF) Improvement of the Field Productivity in Rehmannia glutinosa

PDF | On Jun 15, 2020, Thanh Loan Pham and others published Improvement of the Field Productivity in Rehmannia glutinosa Libosch.

3、Application of Chemical Fertilizers and Plant Spacing Improves Growth

Application of chemical fertilizers and plant spacing improves growth and root yield of Rehmannia glutinosa libosch. Asian J. Plant Sci., 19: 68-76.

4、Challenges of continuous cropping in Rehmannia glutinosa: Mechanisms

Studies show that first-cropped Rehmannia yields between 52,500 and 75,000 kg ha−1, whereas continuously cropped Rehmannia yields only 1500–7500 kg ha −1, representing a substantial decline in yield (Guo et al., 2012; Qin et al., 2024; Wang et al., 2022c).

Effects of Microbial Fertilizers on Growth, Yield and Quality of

The Rehmannia glutinosa ‘Wen 85-5’ was used as test material, the pot experiment method was used to study the effects of six kinds of microbial fertilizers on agronomic traits, yield and quality of Rehmannia glutinosa,the mitigation effects of six kinds of microbial fertilizers on continuous cropping obstacles of Rehmannia glutinosa was ...

What type of fertilizer does my Rehmannia need?

Nearly any kind of general-purpose fertilizer with a balanced amount of the three main plant nutrients will work well for a Rehmannia. However, there are a few specific nutrient blends that can be even more beneficial.

Planting techniques of Rehmannia glutinosa 04/25 Update MySheen

Rehmannia glutinosa likes fertilizer. In addition to applying sufficient base fertilizer, 100 kg of superphosphate and 30 kg of rotten cake fertilizer are applied per mu after interseedling to promote the development and expansion of rhizome.

[Genomic information mining reveals Rehmannia glutinosa growth

This study explored the growth-promoting effect and mechanism of the endophytic bacterium Kocuria rosea on Rehmannia glutinosa, aiming to provide a scientific basis for the development of green bacterial fertilizer.

Application of Chemical Fertilizers and Plant Spacing Improves Growth

Semantic Scholar extracted view of "Application of Chemical Fertilizers and Plant Spacing Improves Growth and Root Yield of Rehmannia glutinosa Libosch" by Thanh Pham et al.

Improvement of the Field Productivity in Rehmannia glutinosa Libosch

The present study aimed to assess the influence of nitrogen (N), phosphorus (P) and potassium (K) fertilizers on the catalpol content of Rehmannia glutinosa roots sown under divergent plant spacing.

Rehmannia glutinosa, also known as Shudi or fresh raw Rehmannia, is a perennial herbaceous plant primarily distributed in temperate regions of Asia. Highly valued in traditional Chinese medicine, it is widely used to treat symptoms such as kidney yin deficiency, lower back and knee weakness, dizziness, and tinnitus. In modern agricultural production, rational fertilization is critical to improving both the yield and quality of Rehmannia. Foliar fertilizers, as a novel type of nutrient supplement, can rapidly provide essential elements through foliar spraying, accelerating growth and enhancing stress resistance. Below is an analysis of the ideal foliar fertilizers for Rehmannia:

1. Nitrogen Fertilizer

• Promotes Growth: Nitrogen is fundamental for plant development, stimulating robust stem and leaf growth in Rehmannia. Adequate nitrogen increases leaf quantity and photosynthetic efficiency, ensuring ample nutrient supply.
• Boosts Yield: Nitrogen application significantly improves yield by strengthening plant structure and disease resistance.
• Enhances Quality: Moderate nitrogen use leads to plump roots, vibrant color, and improved taste.
• Caution: Excessive nitrogen may cause overly vigorous vegetative growth, hindering root formation. Control dosage to avoid overapplication.

2. Phosphorus Fertilizer

• Strengthens Root Systems: Phosphorus promotes strong, healthy root development, enhancing water and nutrient absorption. This improves drought resistance and overall resilience.
• Improves Stress Tolerance: Phosphorus-rich fertilizers help Rehmannia adapt to adverse conditions, such as drought, by fortifying root systems.
• Upgrades Fruit Quality: Proper phosphorus levels result in plump, visually appealing, and flavorful roots.
• Caution: Overuse may accelerate growth at the cost of root development. Monitor application rates carefully.

3. Potassium Fertilizer

• Accelerates Root Maturation: Potassium facilitates uniform sugar and nutrient accumulation during root maturation, ensuring plump, well-developed roots.
• Strengthens Disease Resistance: Potassium enhances immune function, reducing susceptibility to pathogens.
• Refines Taste and Appearance: Optimal potassium levels improve sweetness, color, and market appeal.
• Caution: Excessive potassium may disrupt root formation. Use within recommended limits.

4. Micronutrients

• Supports Growth and Development: Elements like boron (B), manganese (Mn), and zinc (Zn) are vital for biochemical processes, growth, and reproduction.
• Enhances Stress Resistance: Manganese boosts photosynthesis, while zinc strengthens disease defense, collectively improving yield and quality.
• Elevates Nutritional Value: Micronutrients enrich the nutritional profile and sensory qualities of Rehmannia roots.
• Caution: Overapplication may disrupt growth balance. Follow precise dosing guidelines.

5. Organic Fertilizers

• Comprehensive Nutrition: Organic fertilizers provide balanced nitrogen, phosphorus, potassium, and micronutrients, while improving soil structure and water-retaining capacity.
• Boosts Soil Fertility: Long-term organic use reduces synthetic fertilizer reliance, cutting costs and promoting sustainable agriculture.
• Improves Flavor: Organic matter enhances aroma, taste, and texture of Rehmannia roots.
• Caution: Excessive use may lead to nutrient imbalance. Apply judiciously.

6. Water-Soluble Fertilizers

• Rapid Nutrient Replenishment: These fertilizers deliver quick-acting nitrogen, phosphorus, potassium, and micronutrients, ideal for early growth stages or stress recovery.
• Efficiency and Convenience: Easy to mix and apply, they save labor and reduce environmental contamination risks.
• Optimized Uptake: Formulated for high absorption rates, they maximize crop performance.
• Caution: Overuse may elevate soil salinity. Adhere to recommended doses and frequency.

Selecting appropriate foliar fertilizers is crucial for Rehmannia cultivation. Decisions should consider growth stage, soil conditions, and target yields, while avoiding excessive or conflicting applications. Thoughtful fertilization practices will optimize yield, quality, and sustainability in Rehmannia farming.