Aspergillus niger

Soil Inoculant and Nutrient Mobilizer for Enhanced Fertility, Plant Growth, and Compost Efficiency

Aspergillus niger is a spore-forming, filamentous fungus used as a microbial inoculant and soil conditioner to improve nutrient availability, plant vigor, and composting outcomes. Known for its powerful organic acid production and enzymatic activity, A. niger solubilizes phosphorus, potassium, and key micronutrients, while breaking down organic matter to improve soil texture and fertility. This biostimulant supports early root development, enhances plant tolerance to abiotic stress, and accelerates compost maturation, making it ideal for sustainable, organic, and regenerative farming systems.

Main Functions:

Functions as a phosphate- and potassium-solubilizing fungus to increase macronutrient bioavailability
Enhances plant growth and root development through microbial metabolite activity
Breaks down organic matter to improve soil structure, moisture retention, and humus formation
Increases composting efficiency and nutrient density of finished compost
Supports microbial diversity and soil health through competitive exclusion

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Enhances Nutrient Availability and Uptake

Acts as a powerful nutrient-solubilizing fungus that improves phosphorus, potassium, and micronutrient accessibility in soil.

Secretes organic acids that mobilize insoluble phosphates and trace elements like Fe, Zn, and Mn
Solubilizes potassium from minerals such as feldspar and mica
Enhances nutrient uptake efficiency and nitrogen availability through organic matter decomposition and microbial mineralization

Improves Soil Structure and Health

Functions as a soil probiotic and biological soil conditioner that enhances soil texture, water management, and microbial activity.

Breaks down organic matter to support humus formation and soil aggregation
Produces natural polymers that improve soil porosity and moisture retention
Increases cation exchange capacity, aiding in nutrient holding and delivery
Supports a biologically active root zone through beneficial microbial interactions

Promotes Plant Growth and Development

Stimulates root and shoot growth through enzymatic and hormonal mechanisms that support early plant vigor.

Produces metabolites that promote root elongation and shoot development
Enhances seed germination and seedling establishment
Supports overall plant biomass accumulation and crop vigor

Boosts Abiotic Stress Tolerance

Improves plant resilience under challenging environmental conditions.

Enhances root function and osmotic regulation under drought and salinity stress
Reduces stress-induced nutrient imbalances by improving nutrient bioavailability

Balances Rhizosphere Microbiology

Promotes beneficial microbial dynamics and helps reduce pathogen impact through ecological competition.

Serves as a plant growth-promoting fungus (PGPF) and beneficial soil microbe that supports a balanced and disease-suppressive microbial community.
Outcompetes soil-borne pathogens for space and nutrients
Supports microbial diversity and root zone health
Indirectly contributes to reduced disease incidence by strengthening plant defenses

Accelerates Composting and Organic Waste Breakdown

Functions as a soil fertility microbe that improves the efficiency of composting processes by rapidly degrading complex organics.

Produces enzymes that break down lignocellulosic materials
Shortens composting time and enhances final nutrient content

Compatible with Organic and Regenerative Agriculture

An effective biostimulant that integrates seamlessly with sustainable farming inputs and systems.

Increases efficiency of low-solubility inputs like rock phosphate
Safe for use in organic-certified production systems
Supports long-term soil fertility and closed-loop nutrient cycling

Why Choose Our Aspergillus niger?

High Spore Count for Effective Root Colonization – Manufactured at 10 billion CFU/g, our formulation ensures vigorous rhizosphere establishment and reliable performance across a range of soil types and climates.
High Organic Acid Production for Nutrient Solubilization – Secretes citric, gluconic, and oxalic acids that release phosphorus, potassium, and micronutrients from insoluble forms, making nutrients more available to crops and improving fertilizer efficiency.
Advanced Enzymatic Activity for Organic Matter Decomposition – Produces cellulases, pectinases, and xylanases that break down complex plant residues, accelerate composting, and support humus formation for long-term soil fertility.
Supports Root Development and Early Plant Vigor – Stimulates root elongation and seedling growth through microbial metabolites, improving crop establishment and access to soil nutrients under diverse field conditions.
Enhances Soil Structure and Moisture Management – Contributes to soil aggregation, porosity, and water retention by transforming organic matter and producing microbial polymers that improve physical soil health.
Compatible with Composting, Organic Inputs, and Soil Microbial Blends – Works synergistically with other beneficial fungi and bacteria, compost teas, and biological amendments to enhance nutrient cycling and microbial balance in soil.
Trusted U.S. Manufacturer of Fungal Biofertilizers – We produce high-viability, spore-forming Aspergillus niger strains for use in agriculture, composting, and soil remediation—available in bulk, private-label, and wholesale formats.

Looking to buy reliable fungal bioinoculants or microbial fertilizers for soil health and composting? Applied Biotech Industries offers commercial-grade Aspergillus niger for nutrient mobilization and organic matter decomposition. The strain is compatible with organic farming microbes, microbial fertilizers for plants, and integrated soil health programs. Contact us today to source custom microbial formulations designed for sustainable and regenerative agriculture.

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Concentration (CFU/g):

10 billion(1.0 × 10¹⁰) CFU/g dry powder
Custom concentrations available upon request

Particle Size (Mesh):

Passes through 100 mesh sieve

Packaging Options:

22 lb (10 kg) pails
44 lb (20 kg) pails
340 lb (155 kg) drums
Smaller custom packaging available on request

Shelf-life:

9 months at room temperature
18 months refrigerated

Storage Recommendations:

Store in a cool, dry location away from direct sunlight.
Reseal container tightly after each use.

Soil Application (Drip, Drench, or Fertigation)

Dosage:

100–200 grams per acre (250–500 grams per hectare)

Frequency:

Apply during early root establishment or transplanting
Reapply every 2–4 weeks, depending on crop cycle and stress pressure

Application Method:

Dissolve thoroughly in water (ensure enough dilution volume to fully saturate the root zone)
Use an agitation tank or manual stirring to maintain microbial suspension
Apply through drip irrigation lines, micro-sprayers, or fertigation systems, positioning flow as close to the root zone as possible
Flush the system after application to prevent clogging or residue buildup
Do not tank mix with herbicides, fungicides, bactericides, or chemical pesticides

In-Furrow

Dosage:

40–80 grams per acre (100–200 grams per hectare)

Frequency:

Apply once at planting to target root initiation and early growth stages

Application Method:

Dissolve microbial powder thoroughly in water
Apply directly into the seed furrow or planting trench at seeding time
If using irrigation systems for delivery, ensure solution contacts the root zone
Maintain agitation to prevent settling

When tank-mixing with fertilizers:

Dilute fertilizer fully in water first before adding microbes
Do not mix with herbicides, fungicides, bactericides, or pesticides

Composting or Organic Matter Amendment

Dosage:

10–20 grams per cubic meter of compost, organic substrate, or potting mix

Frequency:

Single application before use or at the beginning of composting/soil blending

Application Method:

For composting, first dissolve powder in water. Then spray piles and turn to evenly distribute product through the piles/windrows.
For organic matter amendment, evenly mix the dry microbial powder growing media during turning or mixing

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Q: What is Aspergillus niger and why is it used in agriculture?

A: Aspergillus niger is a spore-forming, filamentous soil fungus widely used as a microbial inoculant, biofertilizer, and soil probiotic. It improves nutrient availability, supports plant growth, and enhances composting efficiency by producing organic acids and enzymes that mobilize nutrients and decompose organic matter.

Q: How does Aspergillus niger improve nutrient availability and soil fertility?

A. niger functions as a phosphate- and potassium-solubilizing fungus. It secretes citric, oxalic, and gluconic acids that release locked nutrients such as phosphorus, potassium, and micronutrients (Fe, Zn, Mn), making them more available for plant uptake and improving fertilizer efficiency.

Q: Is Aspergillus niger effective in composting or organic matter decomposition?

Yes. Aspergillus niger accelerates composting by producing enzymes such as cellulases, pectinases, and xylanases that break down lignocellulosic materials. This helps transform crop residues and organic waste into nutrient-rich, stable compost.

Q: Where can I buy Aspergillus niger for agriculture or composting?

You can purchase Aspergillus niger directly from Applied Biotech Industries. We are a U.S.-based microbial fertilizer manufacturer offering high-viability fungal biofertilizers for sustainable, organic, and regenerative farming systems. Wholesale, private-label, and custom formulations are available.

Q: What packaging sizes are available for Aspergillus niger products?

We offer Aspergillus niger in dry powder form in 22 lb pails, 44 lb pails and 340 lb drums (10 kg pails, 20 kg pails, and 155 kg drums).

Q: Is Aspergillus niger suitable for all soil types and crops?

Yes. It is compatible with a wide range of crops—including vegetables, row crops, orchards, and turf—and performs well in acidic, saline, compacted, or nutrient-depleted soils. It’s especially valuable in degraded or transitioning organic systems.

Q: How is Aspergillus niger applied in the field or composting systems?

It can be applied via soil drench, in-furrow application, fertigation, compost inoculation, or seed coating. A. niger can also be blended with other microbial fertilizers or biostimulants for integrated soil fertility programs.

Q: Can Aspergillus niger be used in organic farming?

Yes. Aspergillus niger is naturally occurring and compatible with organic-certified production systems. Please verify that the formulation meets your certifier’s requirements for approved microbial inputs.

Q: Is Aspergillus niger compatible with other microbial or biological products?

Generally yes. It works synergistically with beneficial bacteria (e.g., Bacillus spp.), mycorrhizae, and compost-based microbial blends. Avoid combining with strong chemical fungicides or oxidizers unless compatibility is tested.

Q: How does Aspergillus niger support plant health under stressful conditions?

A. niger enhances root function, nutrient uptake, and microbial activity under drought, salinity, and nutrient stress. Its ability to improve soil structure and nutrient solubilization helps crops maintain vigor in challenging environments.

Q: What is the shelf life of Aspergillus niger?
A. When stored at room temperature, Aspergillus niger remains viable for at least 9 months. Refrigerated storage extends shelf life up to 18 months.

Q: What makes Applied Biotech a trusted source for agricultural fungi and microbial fertilizers?

A: Applied Biotech Industries is a U.S.-based microbial fertilizers manufacturer specializing in high-viability agricultural microbial strains like Aspergillus niger. As a producer and supplier of microbial inoculants, we offer commercial-grade biofertilizers and beneficial microbes for plants—available wholesale, in bulk, or private-label. Our fermentation process ensures consistent quality, and our products are ideal for farmers, composters, and soil health programs looking to buy agricultural microbes online.

Q: Can I buy microbial inoculants, biofertilizers, or Aspergillus niger in bulk, wholesale, or private-label formats?

A: Yes. Applied Biotech Industries is a microbial inoculants supplier and fermentation-based producer offering Aspergillus niger and other fungal biofertilizers for private-label branding, bulk purchase, and wholesale distribution. Whether you're searching for microbial fertilizers, agricultural fungi for sale, or the best microbes for soil health, we provide custom formulations tailored for composting programs and agricultural input lines. Contact us to buy biofertilizers online or request a private-label solution.

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Safety Data Sheet (SDS)

1. Aspergillus niger as a Biological Input for Improving Vegetable Seedling Production

‍ 🔗 Read the study

Key Findings:

Inoculation with A. niger significantly enhanced shoot and root growth across seven vegetable species, including lettuce, kale, tomato, and pepper.
Shoot fresh mass increased by up to 101% in scarlet eggplant and 92% in pepper.
Both seed treatment and in-furrow applications were effective, demonstrating A. niger's versatility as a biofertilizer.

2. Phosphate-Solubilizing Aspergillus niger PH1 Ameliorates Growth and Stress in Maize
🔗 Read the study

Key Findings:

A. niger PH1 solubilized insoluble phosphate and produced plant growth-promoting hormones like IAA and SA.
Inoculation mitigated lead-induced stress in maize, restoring and enhancing root and shoot growth beyond control levels.
Demonstrates A. niger's dual role in nutrient mobilization and abiotic stress tolerance.

3. Improving Municipal Solid Waste Compost Process by Cycle Time Reduction Using Aspergillus niger
🔗 Read the study

Key Findings:

Inoculating compost with A. niger reduced composting time to 18 days, outperforming other microbial treatments.
Enhanced compost quality indicators, including higher germination index and optimal temperature profiles.
Highlights A. niger's efficacy in accelerating organic matter decomposition and improving compost efficiency.

4. Aspergillus niger as the Rapid Press Mud Composting Agent
🔗 Read the study

Key Findings:

A. niger efficiently decomposed press mud, a sugar industry by-product, into nutrient-rich compost.
The fungus's hydrolytic enzymes facilitated rapid organic matter breakdown, enhancing compost quality.
Demonstrates potential for sustainable waste management and soil fertility improvement.

5. Unraveling the Genome Sequence of Plant Growth Promoting Aspergillus niger (CSR3)
🔗 Read the study

Key Findings:

Genome analysis of A. niger CSR3 revealed genes responsible for the synthesis of secondary metabolites and plant hormones.
The strain promotes plant growth and enhances stress resilience through hormone regulation and metabolite production.
Provides molecular insights into A. niger's mechanisms as a plant growth-promoting fungus.

6. Phosphate Solubilizing Aspergillus niger PH1 Ameliorates Growth of Zea mays Under Lead Stress
🔗 Read the study

Key Findings:

A. niger PH1 improved maize growth under lead stress by solubilizing insoluble phosphate and producing plant growth-promoting hormones.
The strain enhanced antioxidant defense systems in plants, indicating reduced stress levels.

7. Aspergillus niger as an Eco-Friendly Agent for Potassium Release from K-Bearing Minerals
🔗Read the study

Key Findings:

A. niger effectively solubilized non-exchangeable potassium from minerals like feldspar and phlogopite.
Optimization of culture conditions led to significant K⁺ release, highlighting its potential as a sustainable alternative to chemical fertilizers.
Suggests A. niger's role in enhancing soil fertility through bioavailable potassium release.

8. Compost and Phosphorus/Potassium-Solubilizing Fungus Aspergillus niger Improve Growth and Nutritional Quality of Quinoa
🔗Read the study

Key Findings:

Integration of A. niger with compost significantly increased quinoa plant dry weight and seed yield, even under reduced PK fertilization.
Enhanced nutrient uptake and improved tolerance to calcareous soil conditions were observed.
Supports the use of A. niger in bioorganic fertilization strategies to boost crop productivity and soil health.

Aspergillus niger