CZ169595A3 - Fertilizer with nitrogen-bonding bacteria and process for preparing thereof - Google Patents

Abstract

Substance for use as manure, soil improver, culture substrate or plant fertiliser is in the form of granules, on the surface of which are N-binding bacteria comprising azospirillum, azotobacter and/or azotobacteraceae. Dextrin can be included as a nutrient for the bacteria. The granules are prepared by a method in which a soln. contg. bacteria is sprayed on.

Description

Fertilizer with nitrogen-binding bacteria and method of its production.

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Technical field _; ~ ý,

The invention relates to a substance which serves as a fertilizer, a soil enricher, a substrate for various agricultural crops or a growth promoting agent for plants and a process for its production.

BACKGROUND OF THE INVENTION

Similar substances mentioned above ensure high productivity and quality in agriculture and therefore it is impossible to imagine working without them from an economic point of view.

However, it is also known that the massive use of fertilizers in recent decades has caused damage to the soil fund, which experts initially tried to prevent even more intensive fertilization. As a result, the ecological equilibrium in the soil was broken and minerals started to get out of the soil and groundwater, especially nitrates, was at risk.

It soon became necessary to reduce the nitrate content of the fertilizer and reduce its supply, but still to provide enough nitrogen for good crop growth to continue to benefit from the beneficial effects of nitrogen and plant growth. This is also an object of the present invention.

SUMMARY OF THE INVENTION

The above-mentioned drawbacks are largely eliminated by the fertilizer according to the invention, which is characterized in that it contains nitrogen-binding bacteria.

Such nitrogen-binding bacteria in a certain amount are naturally present in healthy soil and the nitrogen is converted into a suitable form for plants. There is insufficient soil in damaged soil or after intensive use of these bacteria in the soil, but the fertilized nitrogen supplied cannot be kept in stock so that it can then be taken up by plants but excreted from the soil as nitrates. By supplying the nitrogen-binding bacteria with the fertilizer according to the invention, the plants eliminate sugar, carbohydrates and the like in the case of nitrogen, thus feeding the nitrogen-binding bacteria and bringing the nitrogen back to the plants, thus avoiding its excretion. In the case of non-fertilized soils, the nitrogen supply can be greatly reduced to a complete stop, since the supplied batteries with the fertilizer or fertilizer granulate according to the invention release the plant nutrients present in the soil, while at the same time the soil is restored.

Preferably, the fertilizer is in the form of a granulate which carries nitrogen-binding bacteria on its surface. In this form, nitrogen can easily be introduced into the soil and the immediate effectiveness of the bacteria in their nitrogen-binding function is ensured.

As nitrogen-binding bacteria, azospirillum, azotobacter and / or azotobacteraceae are used.

A further characteristic is that the fertilizer may further comprise dextrin as a binder and a bacterial nutrient, thereby ensuring good adhesion of the bacteria and a sufficient number thereof.

The invention further relates to a process for the production of a fertilizer, soil enricher, substrate for various agricultural crops or a plant growth aid as described above, characterized in that a solution containing nitrogen-binding bacteria is applied to the granulate and the granulate is not subjected to drying.

In the experiments, a nutrient solution for nitrogen-binding bacteria was applied to a conventional granulate as follows: The granulate consists of various, finely ground, rock minerals that make up about 2/3 of the weight and three-layer clay minerals with about 1/3 weight and a small amount of magnesium oxide. 2% by weight of dextrin was admixed as binder. After mixing and water supply, granulation occurred. This granulate was then passed through a swivel dryer where it was heated to about 200C. This was followed by cooling and sieving. At this point the granulate had a temperature of about 40'C.

After sieving, a nutrient solution with nitrogen-binding bacteria was sprayed onto the granulate. This nutrient solution consists of sugar water with enrichment of nutrients such as magnesium, sodium, iron, copper, zinc, manganese and reinforced molybdenum, which were previously excreted in acetic acid. Nitrogen-binding bacteria were added to this nutrient solution at about 25 ° C for propagation. After a few days, the liquid was diluted with an additional 2/3 by weight water with good bacterial growth and ready to be applied to the granulate.

Application to the granulate at its elevated temperature was followed by further bacterial growth. Thanks to the dextrin in the granulate, stabilization of the nitrogen-binding bacteria was ensured until use.

The granulate thus produced was used experimentally for fertilization in the planting of all agricultural plant crops and has been shown to have a very good effect on the quality of the fruit, the size of the crop and the improvement of the soil quality.

Claims (5)

R7VENTENT REQUIREMENTS CLAIMS 1. Fertilizer used as a soil enricher, a substrate for various agricultural crops or a growth promoting agent for plants, characterized in that it contains nitrogen-binding bacteria. Fertilizer according to claim 1, characterized in that it is a granulate and carries nitrogen-binding bacteria on its surface. Fertilizer according to claim 1 or 2, characterized in that azospirillum, azotobacter and / or azotobacteraceae are used as nitrogen-binding bacteria. Fertilizer according to one of the preceding claims, characterized in that it contains dextrin as a bacterial nutrient. A method for producing a fertilizer such as a soil enricher, a substrate for various agricultural crops or a plant growth aid according to claims 2 to 4, characterized in that a solution comprising nitrogen-binding bacteria is applied to the granulate. »»