1、Polyphosphate

Polyphosphate-enriched algae fertilizer (PEA) gradually releases phosphorus, ensuring a sustained and steady supply of phosphorus in the soil. PEA enhances phosphorus solubilization and uptake by improving soil microbial activity and promoting beneficial microbial communities.

2、Influence of Nitrogen and Phosphorus on Microalgal Growth, Biomass

Investigation on the role of nitrogen and phosphorus, which are crucial for the growth of algae, has been addressed. However, there are challenges for enhancing nutrient utilization efficiently for large scale microalgae cultivation.

3、The significance of phosphorus in algae growth and the subsequent

Briefly, the P concentration in environment directly affected the growth of algae, including the population density, specific growth rate, photosynthetic pigment and food quality (element ratio and cells sizes).

4、How Does Fertilizer Affect The Growth Of Algae?

The primary fertilizers that contribute to algae growth are those high in nitrogen and phosphorus, such as ammonium nitrate, urea, and phosphate rock. These nutrients act as potent stimulants for algal proliferation.

5、How do phosphates impact the growth of algae?

While phosphates can promote algae growth under certain conditions, excessive phosphate levels in water bodies can lead to a phenomenon known as eutrophication. Eutrophication is the process by which a body of water becomes overly enriched with nutrients, primarily nitrogen and phosphorus.

Effect of Nitrate and Phosphate Levels on the Growth of Algae

The experiment in this lesson plan demonstrates two main ideas. The first is a test of what levels of nitrate and phosphate allow for optimum algal growth. The second demonstrates at which levels of nitrate and phosphate algal blooms may occur, causing harm to an aquatic ecosystem.

Polyphosphate

These data showed that algae fertilizers, especially PEA, can stabilize soil P fertility and stimulate plant growth through their slow P release and the recruitment of beneficial microbes.

Phosphorus biofertilizer from microalgae

This is because algae can acquire and store phosphorus through luxury uptake and the phosphorus-enriched algal biomass can be applied as a fertilizer to soil in return.

The significance of phosphorus in algae growth and the subsequent

Previously it was reported that P is the limiting factor for the phytoplankton growth, and its excessive content in the environment leads to the massive growth of algae (Song et al. 2018; Young and Beardall 2003).

Potential of algae as fertilizers and plant stimulants for sustainable

In addition to serving as fertilizers that boost soil health and nutrition, algae and their extracts are used as plant stimulants to promote growth, development, and overall plant health.

Phosphate fertilizer is a commonly used agricultural input that provides essential phosphorus for crop growth and development. many farmers are troubled by the tendency of algae to thrive on the surface of phosphate fertilizer. Below is an explanation of the causes and proposed prevention measures.

I. Reasons for Algae Growth on Phosphate Fertilizer

1. Temperature Conditions: Algae thrive in temperatures between 10°C and 30°C. When temperatures exceed this range, algae reproduce rapidly, leading to colonization on the surface of phosphate fertilizer. Additionally, high temperatures accelerate moisture evaporation from the fertilizer, drying the soil and further promoting algae growth.

2. Humidity Conditions: Algae require high humidity to grow. When ambient humidity is elevated, algae spores easily spread and adhere to phosphate fertilizer surfaces. A wet environment also accelerates algae proliferation.

3. Light Conditions: Sunlight is critical for algae growth. It promotes spore germination and growth, enabling algae to quickly cover the surface of phosphate fertilizer. Thus, algae thrive under sunny conditions.

4. Soil Conditions: Soil nutrient levels significantly impact algae growth. Deficiencies in nitrogen, phosphorus, or potassium can accelerate algae growth, encouraging colonization on phosphate fertilizer. Soil pH also plays a role: acidic soil favors algae, while alkaline soil inhibits it.

II. Prevention Measures

1. Improve Soil Conditions: Enhance soil fertility by adding organic matter (e.g., compost) to reduce algae growth rates.

2. Control Irrigation: Avoid overwatering by adjusting irrigation volume and frequency. Excessive soil moisture promotes algae, so proper water management is key.

3. Optimize Fertilization Methods: Use deep placement or furrow application to minimize direct contact between phosphate fertilizer and algae. Avoid excessive fertilization and apply at optimal times.

4. Use Algaecides: Apply chemicals like copper sulfate or iron sulfate to kill or inhibit algae spores. Follow dilution and usage instructions carefully.

5. Regular Cleaning: Routinely inspect phosphate fertilizer surfaces and remove algae manually or with tools to maintain cleanliness.

The growth of algae on phosphate fertilizer results from a combination of temperature, humidity, light, and soil conditions. To address this issue, adopt a comprehensive approach: improve soil health, manage irrigation, adjust fertilization practices, use algaecides, and perform regular maintenance. These steps will help reduce algae colonization and ensure healthy crop growth.