There is a fertilizer, which is a slow-release agent for nitrogen fertilizer, a synergist for phosphate fertilizer, a protective agent for potassium fertilizer, and a chelating agent for medium and trace elements, which is humic acid fertilizer.
Humic acid is a kind of natural organic matter. It is the remains of animals and plants such as forests, grasslands, and swamps. It is a type of natural organic compound accumulated through changes in the crust, decomposition of plant microorganisms, and a series of chemical transformations. of organic matter and humic acid. It exists in large amounts in lignite, weathered coal, and peat.
Humic acid itself contains the elements carbon, hydrogen, oxygen, nitrogen, etc. required for plant growth, and at the same time it can improve the utilization rate of nitrogen, phosphorus and potassium fertilizers, so the effect of humic acid on crop yield is very obvious. Compared with the application of chemical fertilizers, the application of humic acid fertilizer and organic-inorganic compound fertilizer: generally, the yield of grain and oil crops in the field increases by about 8% to 20%, and the yield of fruits, vegetables and economic crops is generally increased by about 15% to 35%. Therefore, in agricultural production, it is an indispensable good helper for farmers' friends. Let's take a look at the powerful effects of humic acid together!
The synergistic effect of humic acid on fertilizers
Since humic acid can adsorb, exchange and activate many mineral elements in the soil, such as nitrogen, phosphorus, potassium, calcium, magnesium, etc., the effectiveness of these elements is greatly increased, thereby improving the nutritional conditions of crops. It acts as a synergist in chemical fertilizers, and reduces the adverse effects of chemical fertilizers on soil physical and chemical properties.
1. The effect of humic acid on nitrogen fertilizer efficiency
Nitrogen fertilizer is an indispensable fertilizer for plant growth. Nitrogen fertilizers are mainly urea and carbon amines. When we apply urea and carbon amines to the ground, they will soon be lost with air and water, and crops can really absorb and utilize nitrogen. Elemental nutrients are only 30%.
The aromatic nucleus, hydroxyl, carboxyl and other acidic functional groups in humic acid can react with nitrogen elements to form very stable new ionic groups, also called complexes. These complexes remain in the soil for a long time, gradually Decomposition releases nitrogen, which is slowly absorbed by plants.
According to statistics, after the nitrogen released by urea and carbonamine is complexed with humic acid, the fertilizer efficiency can reach more than 60 days, which increases the utilization rate of nitrogen fertilizer by more than 10%.
2. The synergistic effect of humic acid on phosphate fertilizer
After the phosphate fertilizer is applied to the soil, the phosphorus element will be fixed by the metal ions in the soil, so that the available phosphorus is converted into delayed phosphorus or ineffective phosphorus.
The aromatic nucleus, hydroxyl, carboxyl and other acidic functional groups in humic acid can react with phosphorus element, making it soluble phosphorus, which increases the activity of phosphorus element and is easily absorbed by plants. According to statistics, after adding humic acid fertilizer, phosphorus fertilizer The fertilizer efficiency can be relatively increased by 5%-10%.
3. The synergistic effect of humic acid on potassium fertilizer
The functional groups in humic acid can also absorb and store potassium ions, which can not only prevent the loss of potassium ions in sandy soil with water, but also prevent the fixation of potassium in cohesive soil, which can improve the utilization rate of potassium fertilizer by about 5%.
The effect of humic acid on soil improvement
Current scientific research shows that soil fertility largely depends on the content of humic acid in the soil. A series of properties of humic acid like cation exchange capacity, oxygen content and ability to hold water are the main reasons why humic acid increases soil fertility and promotes plant growth. The most important thing is that humic acid can be combined with metal cations, oxygen, and hydroxide compounds, and then slowly released for crop utilization. It is precisely because of these properties that humic acid can play physical, chemical, and ecological functions in soil improvement. and other effects.
First of all, humic acid can improve the physical structure of soil. Humic acid can promote the formation of aggregates, enhance the ability of soil to retain water and fertilizer. For relatively hard soil such as saline-alkali land, it can improve soil ventilation and permeability, so as to change the physical and chemical properties of soil alkalinity, soil particle dispersion and poor soil structure. , to improve farming conditions. Humic acid also has a very good improvement effect on white mud soil and red loam soil. Humic acid can hold water on the soil surface by binding the combination, preventing soil cracking and soil erosion. Further soft soil increases soil permeability, improves soil utilization, increases soil drought resistance, darkens soil color, and is more conducive to absorbing sunlight.
Secondly, humic acid has the following functions in improving soil chemical properties. It can neutralize the acidity and alkalinity of the soil and adjust the pH value; it can chelate metal cations to facilitate the absorption and utilization of the roots; keep water in the roots of the crops, dissolve inorganic fertilizers and reduce their loss; reduce phosphorus and calcium, iron, magnesium, Aluminium reactions, or converting them from an inactive state to a form that can be absorbed and utilized by plants; can reduce toxins in the soil.