1、Effects and assessment of the combined application of biogas slurry and

In the field of organic fertilizer utilization, biogas slurry, a liquid byproduct of the anaerobic fermentation process, is rich in partially decomposed organic matter, soluble inorganic nutrients (such as nitrogen, phosphorus, and potassium), and microbial metabolites (Zheng et al., 2022).

2、How To Use Biogas Slurry As Fertilizer

Farmers can apply biogas slurry through three main methods: direct soil application, foliar spraying (mixing one part slurry with five parts water), and irrigation systems, with best results shown during early morning or evening application.

3、Plant Archives BIOGAS SLURRY AS FERTILIZER: A BRIEF REVIEW

The findings suggest that sole or integrating biogas slurry with mineral fertilizers improves nutrient availability and soil health, resulting in increased crop yields across various staple...

Boost Crop Yields: Using Biogas Slurry As Organic Fertilizer

Discover how biogas slurry can enhance crop yields as a sustainable, organic fertilizer. Learn benefits, application methods, and environmental impact.

Research on the Control System for the Use of Biogas Slurry as Fertilizer

Taking into account factors such as soil and humidity, an algorithm based on biogas slurry conductivity for slurry mixing decisions and the feedback control mechanism has been designed.

Biogas slurry foliar fertilization technology

The biogas slurry is fully fermented, which is rich in nutrients required by various crops, so it is very suitable for external fertilization, and its effect is better than that of fertilizer.

Evaluating the effects of biogas slurry and biochar as a partial

Studies have demonstrated that the organic matter contained in biogas slurry facilitates the formation of soil aggregates, improves soil physicochemical properties, and effectively enhances soil fertility (Islam et al., 2010).

Using biogas slurry to fertilize fruit leaves

The biogas slurry after anaerobic fermentation for more than 45 days is taken out from the water pressure of the biogas digester and can be sprayed after 2-3 days; the biogas slurry of the Ningxiaoxiaokang type biogas digester and the upflow type floating mask biogas digester passes through.

Overview on agricultural potentials of biogas slurry (BGS

BGS demonstrates potential applications as a soil conditioner, fertilizer, and bio-pesticide in agriculture. The detailed discussion over different applications of BGS in crop fields is presented in Section 2.2.

Replacing chemical fertilizers with biogas slurry is an environment

Biogas slurry, which is rich in nitrogen, has been proposed as an organic substitute for chemical fertilizer via drip irrigation. However, the dynamics of nitrogen migration and potential threats to biogas slurry return remain unclear.

Biogas slurry is a liquid fertilizer rich in various nutrients, produced through the fermentation of organic waste such as livestock manure and kitchen scraps. It not only improves soil structure and enhances fertility but also provides comprehensive nutrition for crops, promoting plant growth. The following guidelines outline its use as a foliar fertilizer:

1. Preparation Phase

• Understand the Components of Biogas Slurry: Before application, familiarize yourself with its composition. Typically, biogas slurry contains nitrogen (N), phosphorus (P), potassium (K), trace elements, vitamins, and other nutrients essential for plant development.
• Check Quality: Ensure the biogas slurry is fresh and uncontaminated. Discard any batches with abnormal odors, colors, or signs of spoilage.
• Prepare Spray Equipment: Select appropriate sprayers based on plant size (e.g., watering cans for large plants, sprayers for small ones). Clean nozzles thoroughly to ensure even distribution.

2. Application Methods

• Dilute the Slurry: Mix biogas slurry with water at a ratio of 5:1 (e.g., 5 liters of slurry + 1 liter of water) to reduce concentration and prevent leaf burn.
• Timing: Apply during peak growth or flowering stages when plants have higher nutrient demands.
• Even Spraying: Cover leaves uniformly, avoiding excess. Spray from top-down to minimize evaporation and maximize absorption.
• Monitor Plant Response: After application, observe for signs of stress (e.g., yellowing, wilting). Adjust dosage if adverse effects occur.

3. Key Considerations

• Avoid Overapplication: Excessive use can harm plants. Follow recommended dilution ratios and application frequencies.
• Environmental Factors: In hot or dry conditions, plants may require more frequent feeding. Adjust doses while monitoring for stress.
• Combine with Other Fertilizers: Integrate biogas slurry with compound fertilizers or organic matter to optimize nutrient balance. Ensure compatibility to avoid chemical reactions.

4. Efficacy Evaluation

• Observe Growth: Healthy plants with vibrant leaves and flowers indicate effective use. Poor growth signals the need for adjustments.
• Measure Nutrient Uptake: To assess efficiency, apply a known volume of diluted slurry, then test residual amounts on leaves versus absorbed quantities. Calculate utilization rates accordingly.
• Refine Practices: Document results and adapt methods based on environmental conditions (e.g., climate, soil type).

Biogas slurry is a sustainable, nutrient-rich foliar fertilizer. Proper use—emphasizing ingredient awareness, dilution, timing, and monitoring—maximizes its benefits while minimizing risks. By combining it with scientific management, farmers can boost crop health and yields effectively.