The Use Of Seaweed (sargassum Polycystum) As A Liquid Fertilizer And Its Effect On N, P, K, Ca, Mg Ultisol Soil And Mustard Greens (Brassica Juncea L.) Organic

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The Use of Seaweed (Sargassum Polycystum) as a Liquid Fertilizer and its Impact on N, P, K, CA, MG Ultisol Soil and Organic Mustard Greens (Brassica Juncea L.)

Introduction

In recent years, the use of organic fertilizers has gained significant attention in the agricultural sector due to its potential to promote sustainable and environmentally friendly farming practices. One such organic fertilizer is seaweed, which has been used for centuries in various parts of the world. Seaweed is rich in nutrients and has been shown to have a positive impact on plant growth and soil health. This study aims to evaluate the effectiveness of seaweed (Sargassum Polycystum) as a liquid fertilizer and its impact on the content of nutrients N, P, K, CA, MG on ultisol soils and mustard greens (Brassica Juncea L.) organically.

Background

Ultisol soils are one of the most common types of soils found in tropical regions, including Indonesia. These soils are characterized by their low fertility and high acidity, making them challenging to cultivate. The use of chemical fertilizers has been a common practice to improve soil fertility, but this approach has several drawbacks, including environmental pollution and soil degradation. In recent years, there has been a growing interest in using organic fertilizers, such as seaweed, to promote sustainable agriculture.

Methodology

This study was conducted at the Screen House and Chemical Laboratory and Soil Fertility, Faculty of Agriculture, University of North Sumatra, Medan, in January 2012. The study used a non-factorial random design (RAL) consisting of nine treatments and two replications, resulting in a total of eighteen experimental units. The treatments applied included P0 (control), P1 to P8, which used EM-4 and variations in volume and frequency of liquid fertilizer application from seaweed.

Results

The results of this study showed that the provision of liquid fertilizer from seaweed did not provide a significant difference to the levels of N, P, K, CA, and MG soil. However, there were significant differences in terms of plant height, number of leaves, and the area of ​​mustard leaves produced. This indicates that although the soil nutrient does not experience a significant increase, seaweed as liquid fertilizer has a positive effect on the vegetative growth of mustard greens.

Discussion

The utilization of Sargassum Polycystum as a liquid fertilizer indicates the importance of innovation in sustainable agricultural practices. Given its organic nature, seaweed provides nutrients that are easily absorbed by plants and increase soil microorganisms that contribute to soil health. Limitations in the content of N, P, K, Ca, and Mg may be caused by other factors such as soil conditions, climate, and agricultural management applied.

Increased plant growth shown through plant height, number of leaves, and leaf area indicates that the use of liquid fertilizer can support the process of photosynthesis and better plant metabolism. This is important to produce more quality agricultural products, especially in the context of organic farming which is now increasingly popular.

Conclusion

The use of Sargassum Polycystum seaweed as liquid fertilizer has a promising potential in increasing the growth of mustard greens organically. Although it does not significantly affect the content of soil nutrients, the positive effect on plant growth shows that innovation in the use of local resources can be beneficial for farmers. Further research is needed to explore the optimal dosage and frequency of application to get the best results, as well as to examine the long-term impact on ultisol soil fertility.

Recommendations

Based on the findings of this study, the following recommendations are made:

  1. Further research is needed: To explore the optimal dosage and frequency of application of seaweed liquid fertilizer to get the best results.
  2. Long-term impact: To examine the long-term impact of seaweed liquid fertilizer on ultisol soil fertility.
  3. Scalability: To scale up the use of seaweed liquid fertilizer in commercial farming practices.
  4. Education and training: To educate farmers and agricultural extension workers on the use of seaweed liquid fertilizer and its benefits.

Limitations

This study has several limitations, including:

  1. Small sample size: The study used a small sample size, which may not be representative of the larger population.
  2. Limited treatment options: The study only used a limited number of treatment options, which may not be representative of the full range of possible treatments.
  3. Short duration: The study was conducted over a short duration, which may not be representative of the long-term impact of seaweed liquid fertilizer.

Future Directions

This study has several future directions, including:

  1. Exploring the optimal dosage and frequency of application: To explore the optimal dosage and frequency of application of seaweed liquid fertilizer to get the best results.
  2. Examining the long-term impact: To examine the long-term impact of seaweed liquid fertilizer on ultisol soil fertility.
  3. Scaling up the use of seaweed liquid fertilizer: To scale up the use of seaweed liquid fertilizer in commercial farming practices.
  4. Education and training: To educate farmers and agricultural extension workers on the use of seaweed liquid fertilizer and its benefits.
    Frequently Asked Questions (FAQs) about the Use of Seaweed (Sargassum Polycystum) as a Liquid Fertilizer

Q: What is Sargassum Polycystum?

A: Sargassum Polycystum is a type of seaweed that is commonly found in tropical waters. It is rich in nutrients and has been used for centuries as a natural fertilizer.

Q: What are the benefits of using Sargassum Polycystum as a liquid fertilizer?

A: The use of Sargassum Polycystum as a liquid fertilizer has several benefits, including:

  • Increased plant growth and yield
  • Improved soil health and fertility
  • Reduced soil erosion and nutrient leaching
  • Increased resistance to pests and diseases
  • Improved water quality and reduced pollution

Q: How does Sargassum Polycystum affect soil nutrients?

A: The use of Sargassum Polycystum as a liquid fertilizer does not significantly affect the levels of N, P, K, CA, and MG soil. However, it has a positive effect on plant growth and soil health.

Q: Can Sargassum Polycystum be used on all types of soil?

A: Sargassum Polycystum can be used on most types of soil, but it may not be suitable for soils with high levels of acidity or alkalinity.

Q: How often should Sargassum Polycystum be applied?

A: The frequency of application of Sargassum Polycystum will depend on the specific needs of the crop and the soil. It is recommended to start with a small application and gradually increase the frequency and amount as needed.

Q: Can Sargassum Polycystum be used in combination with other fertilizers?

A: Yes, Sargassum Polycystum can be used in combination with other fertilizers, but it is recommended to start with a small application and gradually increase the frequency and amount as needed.

Q: Is Sargassum Polycystum safe for human consumption?

A: While Sargassum Polycystum is generally considered safe for human consumption, it is recommended to avoid eating it raw or in large quantities. It is also recommended to cook it thoroughly before consuming it.

Q: Can Sargassum Polycystum be used in organic farming?

A: Yes, Sargassum Polycystum can be used in organic farming. It is a natural and non-toxic fertilizer that is free from synthetic chemicals and pesticides.

Q: How can I obtain Sargassum Polycystum?

A: Sargassum Polycystum can be obtained from various sources, including:

  • Local seaweed farms or suppliers
  • Online retailers or marketplaces
  • Government agencies or research institutions

Q: What are the potential risks associated with using Sargassum Polycystum as a liquid fertilizer?

A: While Sargassum Polycystum is generally considered safe, there are some potential risks associated with its use, including:

  • Allergic reactions or skin irritation
  • Digestive problems or gastrointestinal upset
  • Interactions with other medications or health conditions

Q: Can I use Sargassum Polycystum on crops other than mustard greens?

A: Yes, Sargassum Polycystum can be used on a variety of crops, including:

  • Leafy greens (such as lettuce, spinach, and kale)
  • Fruits (such as strawberries, blueberries, and raspberries)
  • Vegetables (such as tomatoes, cucumbers, and bell peppers)
  • Grains (such as wheat, oats, and barley)

Q: How can I store Sargassum Polycystum?

A: Sargassum Polycystum can be stored in a cool, dry place, away from direct sunlight and moisture. It is recommended to store it in an airtight container or bag to maintain its potency and freshness.

Q: Can I use Sargassum Polycystum in combination with other natural fertilizers?

A: Yes, Sargassum Polycystum can be used in combination with other natural fertilizers, such as:

  • Compost
  • Manure
  • Fish emulsion
  • Bone meal
  • Alfalfa meal

Q: How can I determine the optimal dosage of Sargassum Polycystum for my crop?

A: The optimal dosage of Sargassum Polycystum will depend on the specific needs of the crop and the soil. It is recommended to start with a small application and gradually increase the frequency and amount as needed.