Selection of BioChar Sources

Oct 13, 2025 by wbrum.org 17 views

The Effect of Providing Various Sources of Biochar and Kieserit Fertilizer on the Growth and Production of Shallots (Allium ascalonicum L.) in Paddy Fields

Introduction

Shallots are a crucial vegetable commodity in Indonesia, playing a vital role in both economic value and nutritional content. With the increasing demand for consumption and onion seeds in the country, the government is forced to import to meet these needs. In an effort to increase the production of shallots, the use of biochar and kieserit fertilizer is the main concern in this study.

Understanding Biochar and Kieserit Fertilizer

Biochar is a black charcoal produced from the biomass heating process in limited oxygen conditions. Its function as a soil improvement can help increase the potassium (K) content in the soil, which plays an important role in the growth and production of onion plants. Meanwhile, Kieserit fertilizer contains important nutrients needed by onion plants to increase the aroma, size, and taste of tubers.

Methodology

This study aims to examine the effect of the provision of various sources of BioChar and Kieseit fertilizer on the growth and production of shallots (Allium ascalonicum L.) which are planted in paddy fields. The location of the study was conducted in Medan Selayang District, with a height of about 25 meters above sea level, taking place from April to July 2018. The method used in this study was a factorial randomized group design with two factors.

Factors and Treatment Combinations

The first factor is the source of Biochar consisting of three types, namely B1 (rice husk), B2 (rice straw), and B3 (oil palm empty bunches) with a dose of 10 tons/ha each. The second factor is the dose of Kieserit fertilizer consisting of four levels, namely K0 (0 g/plot), K1 (5 g/plot), K2 (10 g/plot), and K3 (15 g/plot). From these two factors, 12 combinations of treatment were tested.

Results and Discussion

The results of statistical analysis show that the provision of various sources of Biochar has a significant effect on plant height at the ages of 7 and 8 weeks after planting (MST), the number of puppies at the ages of 3 and 7 MST, and dry weight of tubers per sample. On the other hand, the treatment with Kiesertu fertilizer does not show a significant effect on all observed parameters.

Optimal Treatment Combination

It can be concluded that the administration of rice straw biochar is the best treatment, while kiesert fertilizer at a dose of 15 g/plot is the most effective treatment in that context.

Conclusion

Increasing the use of biochar in agriculture can be a solution to increase soil fertility and productivity of shallots. Biochar has the potential to improve soil structure, increase water retention, and optimize the availability of nutrients. Thus, this study shows the importance of the selection of BioChar sources and the use of appropriate fertilizer to support the growth and production of onion plants in paddy fields, and can reduce dependence on the import of shallots in the future.

Implications for Farmers and the Community

With the right combination between BioChar and fertilizer, farmers are expected to increase the harvest of shallots, provide economic benefits, and meet the needs of community consumption on a sustainable manner.

Recommendations

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

Selection of BioChar Sources: The selection of biochar sources is crucial in determining the effectiveness of biochar in improving soil fertility and productivity of shallots. Rice straw biochar is recommended as the best treatment.
Use of Kieserit Fertilizer: The use of kieserit fertilizer at a dose of 15 g/plot is recommended as the most effective treatment.
Integration of BioChar and Fertilizer: The integration of biochar and fertilizer is essential in supporting the growth and production of onion plants in paddy fields.

By following these recommendations, farmers can increase the harvest of shallots, provide economic benefits, and meet the needs of community consumption on a sustainable manner.
Frequently Asked Questions (FAQs) on the Effect of Providing Various Sources of Biochar and Kieserit Fertilizer on the Growth and Production of Shallots (Allium ascalonicum L.) in Paddy Fields

Q1: What is biochar and how does it affect the growth and production of shallots?

A1: Biochar is a black charcoal produced from the biomass heating process in limited oxygen conditions. It can help increase the potassium (K) content in the soil, which plays an important role in the growth and production of onion plants.

Q2: What is kieserit fertilizer and how does it affect the growth and production of shallots?

A2: Kieserit fertilizer contains important nutrients needed by onion plants to increase the aroma, size, and taste of tubers. However, the treatment with kiesertu fertilizer does not show a significant effect on all observed parameters in this study.

Q3: What are the optimal treatment combinations for the growth and production of shallots?

A3: The administration of rice straw biochar is the best treatment, while kiesert fertilizer at a dose of 15 g/plot is the most effective treatment in that context.

Q4: How can the use of biochar in agriculture increase soil fertility and productivity of shallots?

A4: Biochar has the potential to improve soil structure, increase water retention, and optimize the availability of nutrients. This can lead to increased soil fertility and productivity of shallots.

Q5: What are the implications of this study for farmers and the community?

A5: With the right combination between BioChar and fertilizer, farmers are expected to increase the harvest of shallots, provide economic benefits, and meet the needs of community consumption on a sustainable manner.

Q6: What are the recommendations based on the findings of this study?

A6: The selection of biochar sources is crucial in determining the effectiveness of biochar in improving soil fertility and productivity of shallots. Rice straw biochar is recommended as the best treatment. The use of kieserit fertilizer at a dose of 15 g/plot is recommended as the most effective treatment. The integration of biochar and fertilizer is essential in supporting the growth and production of onion plants in paddy fields.

Q7: How can farmers integrate biochar and fertilizer to support the growth and production of shallots?

A7: Farmers can integrate biochar and fertilizer by applying rice straw biochar and kieserit fertilizer at a dose of 15 g/plot to their shallot crops. This can lead to increased soil fertility and productivity of shallots.

Q8: What are the potential benefits of using biochar and kieserit fertilizer in agriculture?

A8: The use of biochar and kieserit fertilizer can lead to increased soil fertility and productivity of shallots, reduced dependence on imports, and economic benefits for farmers.

Q9: How can the findings of this study be applied in real-world agricultural settings?

A9: The findings of this study can be applied in real-world agricultural settings by farmers and agricultural researchers who are interested in improving soil fertility and productivity of shallots using biochar and kieserit fertilizer.

Q10: What are the limitations of this study and areas for future research?

A10: The limitations of this study include the use of a factorial randomized group design and the limited number of treatment combinations tested. Future research can focus on exploring the effects of different biochar sources and fertilizer doses on the growth and production of shallots.