Kivennäishumuslöydökset

Kivennäishumus, also known as mineral humus, is a complex organic-mineral substance found in soils. It is formed through the decomposition of organic matter, such as plant and animal residues, in the presence of mineral soil particles. This process is facilitated by microorganisms in the soil, which break down complex organic compounds into simpler forms. These simpler organic molecules then interact with clay minerals and other inorganic components of the soil, forming stable complexes.

The properties of kivennäishumus are a result of the combined characteristics of both its organic and mineral components. The organic fraction, rich in humic substances like humic acids and fulvic acids, contributes to nutrient retention, water holding capacity, and a dark color. These acids can chelate essential plant nutrients, making them more available for uptake. The mineral fraction, typically composed of clay particles, provides a large surface area for the adsorption of organic molecules and contributes to soil structure and aggregation.

Kivennäishumus plays a crucial role in soil fertility and health. Its presence improves soil structure, making it more friable and less prone to compaction. This enhanced structure facilitates better aeration and water infiltration, which are vital for root growth and microbial activity. Furthermore, the high cation exchange capacity of kivennäishumus allows it to hold onto essential nutrients like potassium, calcium, and magnesium, preventing their leaching from the soil. It also acts as a buffer, moderating soil pH. The formation and maintenance of kivennäishumus are therefore key objectives in sustainable soil management practices.