Introduction

Sustainable plant nutrition is a crucial aspect of modern agriculture, especially in a context where the demand for food production is constantly increasing. Natural biostimulants emerge as an effective solution to optimize crop health and performance while promoting a more sustainable and environmentally friendly approach. At Ecoganic, we specialize in the development of these products, offering solutions that combine science and nature to enhance agricultural productivity.

Importance of plant nutrition

Plant nutrition is fundamental for the growth and development of plants. Adequate availability of nutrients improves not only the yield in terms of quantity but also the quality of the harvests. In this sense, biostimulants play a key role by facilitating nutrient absorption and improving plant resistance to adverse conditions.

Current challenges in agriculture

Farmers face numerous challenges, such as climate change, soil degradation, and the pressure to increase production. Implementing sustainable agriculture practices becomes essential to address these issues. Natural biostimulants help mitigate some of these challenges by improving soil health and nutrient use efficiency. For more information on the regulation of these products, you can consult the article on biostimulant regulation in Europe.

According to a FAO study, it is estimated that by 2050 agricultural production will need to increase by 70% to feed a growing global population. This implies the need to adopt more efficient and sustainable practices, where biostimulants play a crucial role. For example, it has been documented that the use of biostimulants can increase water use efficiency by 20-30%, which is essential in drought-affected regions.

Impact of agrochemical use

Excessive use of agrochemicals has led to soil degradation and contamination of water resources. Studies have shown that the use of chemical fertilizers can reduce microbial biodiversity in the soil by 40-60%, negatively affecting the health of the agricultural ecosystem. This underscores the importance of sustainable alternatives, such as biostimulants, which not only improve plant health but also promote healthier soil, achieving a synergy between agricultural production and environmental conservation.

Natural biostimulants and their function

Natural biostimulants are formulations that include beneficial microorganisms, plant extracts, and bioactive compounds that promote plant growth and improve crop quality. These products act through different mechanisms:

• Improvement of nutrient absorption: They increase the availability of nutrients in the soil. For example, mycorrhizal-based biostimulants can increase phosphorus absorption by 50-100% in soils with low availability of this nutrient.
• Growth stimulation: They promote root development and vegetative growth. A study conducted on corn crops showed that the application of seaweed extracts increased root growth by 25% compared to the control.
• Stress resistance: They help plants tolerate adverse conditions, such as droughts or saline soils. Recent research has shown that biostimulants can increase salt tolerance in crops like tomatoes, improving yield under saline stress conditions by 15-20%.

Biochemical mechanisms of action

Biostimulants act at the biochemical level by interacting with the metabolic pathways of plants. For example, phenolic compounds present in plant extracts can act as plant hormones, regulating processes such as photosynthesis and protein synthesis. This not only promotes more vigorous growth but also enhances the plants’ ability to cope with abiotic stress factors.

Additionally, biostimulants can influence the production of secondary metabolites that enhance resistance to pathogens. A recent study demonstrated that the use of an amino acid-based biostimulant in pepper crops increased the concentration of antioxidant compounds by 30%, which not only improves plant health but also its nutritional quality.

Types of natural biostimulants

There are different types of biostimulants, each with specific characteristics. At Ecoganic, we offer:

• Microorganism-based biostimulants: They improve the biological activity of the soil. For example, the application of plant growth-promoting rhizobacteria (PGPR) can increase nutrient availability in the soil and improve the overall health of plants.
• Plant extracts: They provide bioactive compounds that stimulate growth. Seaweed extracts, such as Ascophyllum nodosum, are known for their ability to enhance root development and increase disease resistance.
• Organic fertilizers: They provide essential nutrients sustainably. These fertilizers not only nourish plants but also improve soil structure and promote beneficial microbial activity.
• Amino acid-based biostimulants: These compounds act as precursors to proteins and promote a faster response from plants to stress conditions. It has been shown that the application of amino acids can increase chlorophyll production by 20%, thus enhancing photosynthesis and overall growth.
• Mycorrhizal fungi extracts: These organisms establish symbiosis with plant roots, facilitating the absorption of nutrients such as phosphorus and nitrogen. In vegetable crops, mycorrhizal fungi have been shown to increase yield by 30% compared to untreated crops.

Implementation of biostimulants

The application of biostimulants requires a strategic approach. It is crucial to consider factors such as:

• Type of crop: Some biostimulants are more effective on certain plant species. For example, mycorrhizal-based biostimulants are particularly beneficial for vegetable and fruit crops.
• Soil conditions: Conducting a soil analysis to determine available nutrients. This allows for adjusting the formulation of the biostimulant to maximize its effectiveness.
• Timing of application: Apply at critical phases of the crop cycle to maximize benefits. Application during stress stages, such as transplanting or flowering, can result in significant improvements in yield.
• Application method: Biostimulants can be applied through irrigation, foliar spraying, or incorporation into the soil. The choice of method will depend on the type of biostimulant and the specific crop, thus optimizing the absorption and effectiveness of the product.