Introduction

The use of organic biostimulants has gained relevance in modern agriculture, especially in a context of seeking more sustainable practices. One of the most prominent biostimulants is Ascophyllum nodosum, a marine algae that offers multiple agronomic benefits. In this article, we will analyze how to apply this biostimulant in your crops and the evident benefits it brings to organic agriculture in Argentina. For more information visit our website.

Benefits of Ascophyllum nodosum

The Ascophyllum nodosum is known for its bioactive properties that stimulate plant growth. Its benefits include:

• Improvement of soil health: This biostimulant promotes microbial activity, resulting in healthier and more fertile soil. The polysaccharides present in the algae act as nutrient precursors, favoring the proliferation of beneficial microorganisms in the soil.
• Increased crop yield: Studies have shown that the use of Ascophyllum nodosum can significantly increase yield, thanks to its ability to improve nutrient absorption. In field trials, increases of up to 20% in soybean and corn crop yields have been recorded.
• Stress resistance: Plants treated with this biostimulant show greater resistance to adverse conditions, such as drought or diseases. For example, it has been observed that Ascophyllum nodosum increases the concentration of antioxidants in plants, allowing them to better tolerate water stress.
• Promotion of root development: It favors the formation of stronger roots, facilitating access to water resources and nutrients. A study in vegetable crops showed a 30% increase in root length after the application of Ascophyllum nodosum.

Impact on agricultural production

The implementation of Ascophyllum nodosum in corn, soybean, and vegetable crops has shown positive results, recording an increase in productivity and quality of harvested products. This is particularly relevant in a country like Argentina, where agriculture is a fundamental pillar of the economy. For example, in a test conducted in the province of Córdoba, corn producers who used this biostimulant reported increases in grain weight, reaching up to 12 tons per hectare, compared to 9 tons for those who did not apply it. Additionally, in soybean crops in Santa Fe, trials showed a 15% increase in seed protein, which translates into significant added value for producers.

Biochemical mechanisms of Ascophyllum nodosum

The Ascophyllum nodosum contains a variety of bioactive compounds, including plant hormones such as auxins, gibberellins, and cytokinins, which play a crucial role in regulating plant growth and development. These hormones stimulate cell division and elongation, resulting in more vigorous growth. Additionally, the fulvic and humic acids present in the algae improve nutrient retention capacity in the soil, facilitating absorption by the roots. Research has shown that extracts of Ascophyllum nodosum can increase the activity of the enzyme catalase, which protects plants from oxidative stress. A study conducted by the National University of La Plata found that plants treated with Ascophyllum nodosum showed a 25% increase in catalase activity, suggesting an improvement in their antioxidant capacity and, therefore, in their resistance to environmental stress.

Improvements in crop quality

In addition to increases in yield, the use of Ascophyllum nodosum has also been shown to improve crop quality. In a study conducted on apple crops in the province of Neuquén, it was observed that fruits treated with the biostimulant showed a 20% increase in soluble solids content, which translates into increased sweetness and consumer acceptance. Likewise, in grape production for wine in Mendoza, it was reported that applications of Ascophyllum nodosum not only increased yield but also improved wine quality, increasing the content of anthocyanins and phenolic compounds, which are fundamental for wine appreciation.

Applications in crops

To maximize the benefits of Ascophyllum nodosum, it is important to follow application recommendations. Here’s how to do it:

How to apply Ascophyllum nodosum in my crops?

The most common method of application is through:

• Fertigation: Diluting the biostimulant in irrigation water, ensuring uniform distribution. This technique is especially effective in extensive crops like soybeans and corn, where uniformity is key to maximizing yield. Studies have shown that fertigation can increase water use efficiency by 30%, optimizing nutrient availability.
• Foliar application: Spraying directly on the leaves, ideal for critical development moments. Foliar applications are recommended during flowering or fruiting stages when plants are more susceptible to stress factors. In a tomato crop trial in the province of Mendoza, a 25% increase in fruit production was achieved by applying Ascophyllum nodosum during the flowering phase.

Recommended doses may vary, but generally, it is suggested to use between 3 to 5 liters per hectare, depending on the crop and specific soil conditions. In vegetable crops, such as tomatoes, a dose of 4 liters per hectare is recommended for foliar applications, which has been shown to increase the size and quality of the fruits. A study in the province of Tucumán showed that the application of Ascophyllum nodosum at this dose resulted in a 30% increase in the diameter of tomatoes, improving their commercial presentation.

Best practices for application

To ensure maximum effectiveness of Ascophyllum nodosum, it is essential to follow some best practices during application:

• Weather conditions: Apply on cloudy days or during the early morning or evening to avoid rapid evaporation and ensure better absorption by the plants. Research has indicated that application under high humidity conditions can increase the effectiveness of the biostimulant by 15%.
• Mix preparation: Ensure that the biostimulant is well diluted and mixed with water, avoiding the formation of lumps that may clog application equipment. A study on product compatibility showed that proper mixing can improve effectiveness by 20% compared to poorly prepared applications.
• Compatibility with other products: Check the compatibility of Ascophyllum nodosum with other fertilizers or pesticides used in the crop to avoid possible adverse reactions. In field trials, it has been shown that combined application with certain nitrogen fertilizers can increase nitrogen absorption efficiency by 15%.

Scientific evidence and regulations

Numerous studies support the effectiveness of Ascophyllum nodosum. According to research conducted by INTA, its use has been shown to increase plant biomass and improve soil quality. Additionally, in Argentina, the use of biostimulants is regulated by SENASA, which guarantees the safety and effectiveness of these products in agriculture. A 2021 study published in the “Agronomy Journal” found that plants treated with Ascophyllum nodosum showed 15% more nitrogen absorption compared to untreated plants, supporting its use as an effective tool for improving crop nutrition.

Recent research

In recent years, several studies have delved into the effects of Ascophyllum nodosum on different crops. A trial conducted in the province of Buenos Aires demonstrated that the application of this biostimulant increased the resistance of soybean plants to diseases such as powdery mildew, significantly reducing the incidence of the disease by 40%. Another study in vegetable crops in Mendoza showed that the use of Ascophyllum nodosum improved tomato quality, increasing soluble solids content and improving fruit coloration, which translates into better market prices. Additionally, a 2022 study at the National University of Rosario showed that the application of Ascophyllum nodosum in onion crops increased production by 18% and improved resistance to pests, such as the onion fly, which represents a competitive advantage for producers.

Comparison with other biostimulants

The Ascophyllum nodosum stands out from other biostimulants due to its unique composition and its ability to interact with plant metabolism. For example, unlike free amino acids, which are primarily used for protein synthesis, Ascophyllum nodosum acts at multiple levels, including hormonal regulation and improvement of soil microbiota. A comparative study conducted at the University of Buenos Aires in 2023 showed that the use of Ascophyllum nodosum resulted in an average increase of 30% in wheat crop yield, surpassing the yield obtained with other biostimulants such as yeast extracts and amino acids. This is attributed to the algae’s ability to increase the activity of certain beneficial microorganisms in the soil, which in turn improve nutrient availability.

Effects on soil microbiota

The application of Ascophyllum nodosum not only benefits plants directly but also has a positive impact on soil microbiota. The polysaccharides present in the algae act as a carbon source for soil microorganisms, promoting their growth and activity. Research has shown that the use of Ascophyllum nodosum can increase the population of bacteria of the genus Rhizobium, which are essential for nitrogen fixation in leguminous crops. In an experiment conducted in the province of Entre Ríos, a 40% increase in the population of these bacteria was observed after the application of Ascophyllum nodosum, which translated into a 12% increase in soybean crop yield. This demonstrates how the use of marine biostimulants can contribute to agricultural sustainability by improving not only plant health but also soil health.

Case studies in Argentine agriculture

Several case studies in Argentina have demonstrated the effectiveness of Ascophyllum nodosum under various agricultural conditions. In a trial conducted by INTA in the province of Córdoba, Ascophyllum nodosum was applied to a corn crop under drought conditions. The results showed that plants treated with the biostimulant had 30% more biomass compared to the control group, demonstrating its ability to help plants cope with water stress. Another case in the province of Mendoza, in Malbec vineyards, showed that the application of Ascophyllum nodosum not only increased yield by 20% but also improved the aromatic profile of the wine, increasing the concentration of volatile compounds responsible for aroma, resulting in a more attractive product for consumers.

Considerations on sustainability

The use of Ascophyllum nodosum not only aligns with sustainable agricultural practices but also contributes to the health and biodiversity of agricultural ecosystems. By improving soil health and increasing plant resistance to diseases and stress, the need for chemical inputs, such as fertilizers and pesticides, is reduced. A study conducted in the province of San Luis demonstrated that the implementation of marine biostimulants, including Ascophyllum nodosum, resulted in a 25% reduction in herbicide use, contributing to more ecological agriculture. The ability of Ascophyllum nodosum to improve soil structure is also an important benefit, as it helps prevent erosion and maintain soil water retention capacity, which is crucial in a climate change context.

Integration into agricultural management programs

To maximize the benefits of Ascophyllum nodosum, it is advisable to integrate it into a broader agricultural management program. This includes practices such as crop rotation, the use of cover crops, and the implementation of water conservation techniques. For example, in a pilot program in the province of Jujuy, farmers who combined the application of Ascophyllum nodosum with soil conservation practices reported a 35% increase in leguminous crop yield. This suggests that the synergy between the use of biostimulants and other sustainable practices can lead to significant improvements in crop productivity and sustainability.

Conclusion

The use of Ascophyllum nodosum as a biostimulant in agriculture not only contributes to improving soil health and increasing crop yield but also aligns with sustainable and responsible agricultural practices. Scientific evidence supports its effectiveness, and its proper application can result in significant benefits for farmers. In a world where sustainability is increasingly important, the use of biostimulants like Ascophyllum nodosum can be a key solution to face current and future agricultural challenges. The integration of these biostimulants into agricultural practices can be part of a broader strategy to improve the resilience of agricultural systems in the face of climate change and market demands, thus ensuring a more sustainable future for agriculture in Argentina.

Agronomic Benefits and Application of Biostimulants with Ascophyllum nodosum

The use of biostimulants derived from Ascophyllum nodosum has proven to be an effective strategy to improve crop yield. According to recent studies, the application of extracts from this marine algae can increase crop production by 10-30%, depending on the species and growing conditions. This is due to its ability to improve nutrient absorption and promote root development.

Additionally, Ascophyllum nodosum contains a variety of bioactive compounds, such as plant hormones (auxins, cytokinins, and gibberellins), which stimulate growth and resistance to adverse conditions. Research has shown that its application can result in a 20% increase in drought resistance and a 15% increase in disease tolerance, which is essential in a context of climate change and increasing pathogens.

To maximize the benefits of Ascophyllum nodosum-based biostimulants, it is recommended to apply the product at critical stages of crop development. For example, during the seedling phase and at the onset of flowering, a synergistic effect that enhances growth has been observed. The recommended dose varies between 2-4 liters per hectare, diluted in water, and it is suggested to perform foliar applications every 15-30 days.

It is essential to conduct a soil analysis and assess the nutritional status of the plants before application, to adjust doses and maximize the effectiveness of the biostimulant. The combination of Ascophyllum nodosum with other fertilizers can further improve results, facilitating balanced nutrition that supports optimal crop growth.