Biochar: Savings for acidic soil, alum, poisoning

Biochar in combination with organic fertilizer, earthworms and legume fixed legumes will form a solid wall that helps maintain and restore the quality of arable land over time, contributing significantly to keeping food security at regional and regional levels.

The soil is degraded and washed away is a great threat to agriculture in Vietnam and the world, directly affecting the national food security and livelihood of rural people.

The Intergovernmental Technical Council for Land Resources (ITPS - FAO) has reported on the state of the world, stating that land is the foundation of life, but this resource is being pushed to limited crisis by human activities. Therefore, providing solutions to restore soil health in the long term is very urgent.

In particular, application of biochar into soil is widely used by improving porosity, improving water holding capacity, nutrients, enriching organic matter and enhancing micro-system activity. soil organisms, help plants grow sustainably. This is also a technological solution introduced by the HCM City Science and Technology Information Center (CESTI).

The use of biochar in combination with organic fertilizer is evaluated to have an effective effect on soil improvement.

Many related studies in recent years have also focused on assessing the effectiveness of biochar to crops and soil quality, suggesting more widespread use of biochar in growing crops. growing and replicating.

According to experts, thanks to the characteristic of large surface area, many pore structures, high carbon content, alkalinity (very suitable for improving acidic and acidic soil) and high electrical conductivity, biochar from Rice husk can enhance overall soil health.

Biochar after saturation of water is applied to the soil in the groove or cultivated (for short-term crops) or around the canopy (for long-term plants).

To increase efficiency, biochar is mixed with cow manure at the rate of 70:30 and then added 10% of earthworm biomass and produces 60-80% moisture for the growth of worms in coal mixture. biology and cow dung. Biochar when accompanied with organic matter into earthworms will be transformed by the intestinal microflora into a biochar with high nutrient content.

In addition, the enzyme system of the worms secreted by biochar will help the coal later be able to absorb pesticides residues in the soil better, leading to increased effectiveness of detoxification of soil, ecological restoration by Biochar results.

This solution improves the stability of soil structure, reduces compression, enhances the ability to spread water in the soil, increases the porosity and the water holding capacity of the soil.

Besides, bio-biochar helps to raise soil pH, improve acid sulphate and acid soil and increase soil nutrient retention, which can save 1/4 to 1/2 of fertilizer used. The technology process is simple, easy to implement, cheap, easy to scale.