Organic Fertilizer

Organic fertilizer, also known as farmyard manure, serves as the foundational fertilizer in China's traditional agriculture. It primarily originates from animal and plant residues or excretions, such as livestock manure, crop straw, fish meal, and bone meal.
With technological advancements, modern organic fertilizers have expanded beyond the concept of farmyard manure. They are now produced industrially and sold as commercial fertilizers.
Organic fertilizers contain substantial amounts of biological matter, plant and animal residues, excretions, and biological waste. They are rich in nutrients like nitrogen, phosphorus, and potassium, as well as organic acids, peptides, and other beneficial compounds.
Offering comprehensive nutrients and sustained fertility, it also increases soil organic matter, promotes microbial proliferation, and enhances soil physicochemical properties and biological activity. As a primary nutrient source for green food production, its slow-release nature typically positions it as a base fertilizer.
However, it has limitations: bulky volume, low nutrient concentration, and the requirement for microbial decomposition (maturation) before plant absorption—otherwise, issues like seedling burn may occur.
Additionally, due to their complex composition, some may contain harmful substances like pathogens, parasite eggs, heavy metals, or antibiotics. Furthermore, different types of organic fertilizers have varying carbon-to-nitrogen ratios, leading to significant differences in their decomposition rates and nutrient release.