HU207504B - Meliorizing or mould suspension and meliorizing process - Google Patents

Abstract

The fertiliser comprises (%w/w); 5-17 artificial manure, 65-92 water based dispersion of a bentonite-alginite type stabiliser, 2.5-7 cement powder, 0.5-10 ground lime and upto 1 other microelements. The suspension is ploughed in about 20 cm deep into the soil

Description

FIELD OF THE INVENTION The present invention relates to a slurry or foliar fertilizer suspension, and to a soil improvement process by the use of a slurry.

Slurry fertilizers are being widely used in agriculture due to their ease of use, uniform application by spraying and their increased efficiency.

Suspension fertilizers are also used for foliar application.

However, the problem of using slurry fertilizers on the one hand is their not-too-high stability during storage and, on the other hand, the fact that there are only few types of formulations available that can influence the pH of the soil.

In agriculture, however, the management of sub-optimal or more alkaline soils is becoming a problem.

Stabilization of slurry fertilizers has been attempted previously by the addition of bentonite.

Such a process is described in Czechoslovakian Patent Specification 197,493 and Hungarian Patent Specification 170791.

However, this method did not achieve the required stability.

In our experimental work, it has been found that the stability of suspensions containing nitrogen and / or phosphorus and / or potassium fertilizers can be greatly enhanced if 5-50 parts by weight of a mixture of bentonite and 9550 parts by weight of alginite, 1-10 parts by weight of organic or inorganic alkali metal salts. and an aqueous dispersion containing from 5% to 35% by weight of dry matter as a stabilizing agent.

In addition to the stabilizer, the slurry according to the invention is admixed with cement fly ash and ground marsh lime, basalt powder or potash, potassium trachite or granite.

By using the cement fly ash powder we increase the Ca and Al content of the soil.

The use of basalt bombs in fertilizers can be used to alkalize acidic soils and avoid the effects of acid rain.

The use of potassium tufa, potassium trachite, granite marble results in acidification of alkaline soils and a record supply of potassium.

The composition according to the invention can be used as both soil improvers and foliar fertilizers.

When used as a foliar fertilizer in forests, the harmful effects of acid rain can be prevented or reduced and the excess product drained from the foliage also serves soil improvement purposes.

The composition is characterized in that 5-17% by weight of potassium and / or phosphorus and / or nitrogen fertilizers, 66-92% by weight of 5-35% by weight of dry matter bentonite alginite aqueous dispersion stabilizer, 2.5-7% by weight. containing by weight of cement fly ash, 0.510% by weight of ground marsh lime, potash, potassium trachite, basalt powder or granite marble or mixtures thereof, and optionally 0.1-1% by weight of trace elements.

The average dust content of the cement fly ash collected in the cement filters is: SiO ₂ : 8-12% by weight, CaCO ₃ : 85-90% by weight, Al ₂ O ₃ : 2.0-2.5% by weight (Beremend cement fly ash powder) .

Lime is a naturally occurring material with a high CaO content. The average composition of the fen Sárszentmihály lime: MgO 2.6 to 3.8 wt%, Fe2O _3: 0.3-0.4 mass%, A1 ₂ O _3: 6.6 to 9.9% by weight, CaO: 55- 82.5% by weight, other compound; in an amount of 100% by weight. Wet lime is ideal for soil alkalization.

The average composition of the other additives used is as follows:

additive Humus% recordable P ₂ O ₅ K ₂ O ca mg So mg / 100 g soil Kali Tufa (Matra) 0.25-0.3 17-20 30-36 2140 54.6 15 Potassium Trachite (Matra) 0.2-0.3 17-22 36-43 1800 40 10 Bazaltpor 0.3 14-18 70-77 115 30 63 Granite crushed stone (Székesfehérvár) 1.2 14-15 8 300 40 4 Alginite (Average) 16 37 56 2030 67 13

The above materials still contain Fe, Mn, Cu, Zn, Cd, Ni as trace elements.

Granite, potash, potassium trachite have a pH of 4.6 to 7.0 and a basalt powder of more than 7.

The composition according to the invention is applied to soil improvement by spraying 20-300 m ³ per hectare in the first year of soil improvement, spraying the sprayed soil to a depth of 10-20 cm, and in the second and subsequent years 10-15 m ³ / hectare is sprayed and plowed to a depth of 10-20 cm.

Advantages of the soil improvement or foliar fertilizer composition according to the invention and its use are:

- Improves the water retention capacity of the soil,

- increases the nutrient retention capacity of land,

- optimizes soil pH

- reduces soil tightness,

- when used as foliar fertilizer, it reduces the amount of woody decay caused by acid rain, but also serves as a soil improver60.

HU

The stability of the suspension during storage is higher than that of known formulations.

The following examples illustrate the composition of the present invention, its preparation and the soil improvement process.

Example 1

Preparation of Dispersion Stabilizer A mixture of parts by weight of bentonite and 90 parts by weight of alginite is weighed into an intensive grinding apparatus. 900 parts of water and 10 parts of sodium carbonate and 2 parts of carboxymethyl starch thickener are added. The mixture was ground for 15 minutes to give a stable slurry.

Example 2

Preparation of dispersion stabilizer

A mineral mixture containing 40 parts by weight of bentonite and 50 parts by weight of alginite is weighed into an intensive mill.

240 parts by weight of water and 3 parts by weight of lithium phosphate are added. The mixture was subjected to vigorous grinding for 10 minutes. The resulting stable slurry is used to stabilize fertilizer suspensions.

Example 3

Preparation of NP fertilizer slurry

The following components were weighed into a multistage mixer: 10 parts by weight of a mixture of urea and monoammonium phosphate (1/3: 2/3 by weight) and 75 parts by weight of the stabilizing dispersion of Example 1. 7 parts by weight of Beremend cement fly ash powder, 6 parts by weight of lime and 1.8 parts by weight of basalt powder and 0.2 parts by weight of Gu, Μη, B micronutrients. The mixture was homogenized for 15 minutes.

The homogeneous slurry is used to improve acidic soils or to fertilize forest areas exposed to acid rain.

Example 4

Preparation of NPK-based fertilizer suspension

The apparatus of Example 3 was charged with 71.5 parts by weight of the stabilizing dispersion of Example 1 and 14 parts by weight of NPK fertilizer. The latter consists of a mixture of 4 parts by weight of urea, 8 parts by weight of monoammonium phosphate neutralized with ammonium hydroxide and 2 parts by weight of potassium nitrate. 4.5 parts by weight of Beremend cement fly ash and 10 parts by weight of a 1: 1 mixture of potash and granite are added.

The material was homogenized for 15 minutes. The resulting homogeneous mixture is used to improve and condition alkaline soils.

504 B

Example 5

70 parts by weight of the stabilizing dispersion of Example 2 were weighed into the apparatus of Example 3. 17 parts by weight of potassium nitrate, 5 parts by weight of Beremend cement fly ash powder and 8 parts by weight of basalt powder are added.

The suspension was homogenized with stirring for 10 minutes and used to condition the acidic soils.

Example 6

The suspension of Example 3 is used to improve acidic soils. Spray a suspension of 25 m ³ per hectare on the soil and then plow 20 cm deep. Thereafter, 15 m ^{3 of} suspension per hectare are sprayed every year for 2 years and plowed at a depth of 15 cm.

The change in soil pH and the germination and development of the maize planted in the soil are compared with that of the control soil.

The control soil was treated with a known 10% NP fertilizer slurry as described above.

The result of the test is as follows.

The initial pH of the soil treated with the suspension of the invention was changed to 6.5. The pH25 of the control soil was unchanged.

In treated soils, the number of plant units per unit area increased by 8% compared to the control.

Plants hatched on the treated soil showed more vigorous growth than the control soil.

Claims (2)

_r PATENT CLAIMS A soil improvement or foliar fertilizer suspension comprising nitrogen and / or phosphorus and / or potassium fertilizers, a stabilizer and water, characterized in that it contains 5-17% by weight of fertilizer, 65-92% by weight of bentonite-alginite-based aqueous dispersion stabilizer, 2.5-7% by weight of cement powder, 0.5-10% by weight It contains 40 marsh lime, basalt powder, or a mixture thereof or potassium, potassium trachite, granite marble or a mixture thereof, and optionally 0.1-1% by weight of trace elements. The suspension according to claim 1, wherein the stabilizer is a mixture of 5 to 50 parts by weight of a mixture of bentonite and 95 to 50 parts by weight of alginite, 1 to 10% by weight of organic or inorganic alkali metal salt, 0 to 5 parts by weight thickener and water. It contains a% solids dispersion. 3. A soil remediation and soil conditioning process, characterized in that from the slurry of claim 1, in the first year of soil improvement, 20-300 m ^{3 /} hectare is sprayed, the sprayed agent is applied to the soil at a depth of 10-20 cm. in the following years 1055 15 m ^{3 of} the slurry will be sprayed per hectare and plowing will be repeated as above.