Chitosan Oligosaccharides are oligosaccharide substance obtained by hydrolysis of chitosan. Chitosan is a polysaccharide extracted from chitin (such as shrimp and crab shells). It is obtained after enzymatic hydrolysis or chemical treatment.
Chitosan oligosaccharides (COS) has a variety of biological activities and is widely used in agriculture, medicine and other fields, such as enhancing plant disease resistance, promoting plant growth, and improving soil environment.
This article explores the applications, usage, and advantages of chitosan oligosaccharide in agriculture.
Applications of Chitosan Oligosaccharides in Agriculture
Chitosan oligosaccharides are versatile in their applications, making them valuable in various agricultural practices:
1. Seed Treatment:
Soaking seeds in a chitosan oligosaccharide solution before planting can enhance germination rates, promote healthy seedling growth, and increase resistance to soil-borne pathogens.
2. Foliar Spray:
Applying chitosan oligosaccharides as a foliar spray can improve plant growth, enhance photosynthesis, and strengthen the plant’s immune system against diseases and pests.
3. Soil Amendment:
Incorporating chitosan oligosaccharides into the soil can improve soil structure, increase microbial activity, and enhance nutrient absorption by plants.
4.Post-Harvest Treatment:
Chitosan oligosaccharides can be used as a natural preservative to extend the shelf life of fruits and vegetables by inhibiting the growth of spoilage microorganisms.
Usage and Dosage of Chitosan Oligosaccharides
The usage and dosage of chitosan oligosaccharides depend on the specific application and crop type. Here are some general guidelines:
Seed Treatment: Dissolve 0.1-0.2% chitosan oligosaccharide in water and soak the seeds for 12-24 hours before planting.
Foliar Spray: Prepare a solution containing 0.05-0.1% chitosan oligosaccharide and spray it on the foliage of the plants every 10-15 days during the growing season.
Soil Amendment: Mix chitosan oligosaccharide into the soil at a rate of 10-20 kg per hectare before planting.
Post-Harvest Treatment: Dip the harvested fruits or vegetables in a 0.1-0.2% chitosan oligosaccharide solution for a few minutes and then allow them to dry naturally.
Benefits and Advantages of COS
The use of chitosan oligosaccharides in agriculture offers several advantages:
1. Enhanced Plant Growth:
Chitosan oligosaccharides promote cell division and elongation, leading to increased plant height, root development, and overall biomass.
2. Disease Resistance:
They activate the plant’s innate immune system, enhancing its ability to resist bacterial, fungal, and viral infections. This reduces the need for chemical pesticides and fungicides.
3. Improved Yield and Quality:
By enhancing nutrient uptake and photosynthesis, chitosan oligosaccharides contribute to higher crop yields and improved quality of produce, such as better flavor, color, and nutritional content.
4. Environmental Safety:
Being biodegradable and non-toxic, chitosan oligosaccharides are safe for the environment, beneficial insects, and human health. They contribute to sustainable farming practices by reducing the reliance on synthetic chemicals.
5. Soil Health:
Chitosan oligosaccharides improve soil fertility by stimulating beneficial microbial activity, enhancing soil structure, and promoting organic matter decomposition. This leads to healthier soils and better crop performance.
6. Cost-Effectiveness:
Despite their many benefits, chitosan oligosaccharides are relatively inexpensive to produce and apply. Their use can lead to significant cost savings in terms of reduced need for fertilizers, pesticides, and post-harvest treatments.
In conclusion, chitosan oligosaccharides represent a promising tool for sustainable agriculture. Their multifaceted benefits, including enhanced plant growth, improved disease resistance, and environmental safety, make them an attractive option for farmers seeking to boost productivity while minimizing environmental impact. As research and development continue, the applications of chitosan oligosaccharides in agriculture are likely to expand, further revolutionizing modern farming practices.
