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Humic acid slow release soil-modifying fertilizer and preparation method thereof

A humic acid, slow-release technology, applied in fertilization methods, organic fertilizers, fertilizer forms, etc., can solve the problems of high cost of carrier materials, large equipment investment, pollution, etc., to improve soil water and fertilizer retention performance, prevent soil compaction, The effect of improving soil structure

Inactive Publication Date: 2009-12-16
INST OF SOIL & FERTILIZER SHANDONG ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problems in the current manufacturing of slow-release fertilizers are the high cost and the environmental risks of the added materials
Among them, Chinese patent documents CN1295192C (200410078165.7), CN1184173C (01133415.0), CN1218907C (02155568.0), and CN1246264C (200410024049.7) are typical examples of using organic polymer materials to perform fluidized bed coating treatment on fertilizers to manufacture slow-release fertilizers. Technical defects are mainly manifested in the high production cost of fertilizers, large investment in equipment, and the coating material of fertilizers is not easy to degrade in the soil and cause pollution, etc.
Chinese patent documents CN1491924 (02133277.0) and CN1470485 (02137991.2) are two examples of adding carrier materials to realize slow release of fertilizers. The main problems are that the cost of carrier materials is high and the production method is relatively complicated.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0020] The preparation method of humic acid slow-release soil improvement fertilizer of the present invention, the steps are as follows:

[0021] Grind the soluble nitrogen, phosphorus and potassium fertilizer raw materials of group B, pass through a 80-mesh sieve, mix evenly with the slow-release fertilizer materials of group A in proportion, add an appropriate amount of binder for granulation, granulate with a rotating disk or drum, and dry after granulation Dry, then cool and sieve.

[0022] The finished product after the above screening can be packaged and tested for delivery.

[0023] The binder for granulation is preferably bentonite or attapulgite powder, which is passed through a 80-mesh sieve. It can be purchased in the market.

[0024] The humic acid slow-release soil improvement fertilizer of the present invention is used as a soil improver, and the fertilizer of the present invention can be used for all types of soil and crops, can improve soil structure, improve...

Embodiment 1

[0043] Embodiment 1: a kind of humic acid slow-release soil improvement fertilizer, raw materials are as follows:

[0044] Group A: 40.9 kg of slow-release fertilizer materials, including 22 kg of humic acid passing through an 80-mesh sieve with a moisture content of 9%wt, 12 kg of lignin from a paper mill left over through an 80-mesh sieve and having a moisture content of 14%wt, and passing through a 80-mesh sieve Mesh sieve, 6 kilograms of bone meal of moisture content 20%wt, cross 0.5 kilogram of carboxymethyl starch of 110 mesh sieves, cross 0.4 kilogram of carboxymethylcellulose sodium of 110 mesh sieves.

[0045] Group B: 65 kg of NPK fertilizers crushed and passed through an 80-mesh sieve, including 15 kg of urea, 10 kg of ammonium sulfate, 12 kg of potassium sulfate, 12 kg of monoammonium phosphate, and 16 kg of superphosphate.

[0046] Preparation:

[0047] Mix the above-mentioned raw materials evenly, use a rotary table or drum to granulate, use 3 kg of bentonite th...

Embodiment 2

[0048] Embodiment 2: a kind of humic acid slow-release soil improvement fertilizer, the raw materials are as follows:

[0049] Group A: 48.7 kg of fertilizer slow-release materials, of which, 16 kg of humic acid with a moisture content of 8%wt passed through an 80 mesh sieve, 25 kg of leftover lignin from a paper mill with a moisture content of 12%wt passed through an 80 mesh sieve, and 25 kg of humic acid passed through an 80 mesh sieve Mesh sieve, 7 kilograms of bone meal with a moisture content of 20%wt, 0.7 kilograms of sodium carboxymethyl cellulose crossing a 110 mesh sieve,

[0050] Group B: 79 kg of nitrogen, phosphorus, and potassium fertilizers crushed through an 80-mesh sieve, including 30 kg of urea, 6 kg of potassium chloride, 20 kg of potassium sulfate, 15 kg of diammonium phosphate, and 8 kg of superphosphate.

[0051] Preparation:

[0052]Mix the above-mentioned raw materials evenly, use a rotary table or drum to granulate, use 3 kg of bentonite that has passe...

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Abstract

The invention discloses a humic acid slow release soil improving fertilizer and a preparation method thereof, and belongs to the technical field of agricultural fertilizer production. The invention produces slow release fertilizer for soil improvement with humid acid, lignin, and ordinary NPK fertilizer as major raw materials. Applicable to all types of soils and crops, the fertilizer can improve soil structure, increase water and manure preservation performance of soil, avoid and treat soil hardening, and have the good improvement effect on saline land in particular. The humic acid slow release soil improving fertilizer can be used as soil dressing agent.

Description

technical field [0001] The invention relates to a slow-release fertilizer, in particular to a slow-release soil improvement fertilizer with humic acid as the main raw material and a preparation method thereof, belonging to the technical field of agricultural fertilizer manufacture. Background technique [0002] China's arable land accounts for 7% of the world's total, but uses about 35% of the world's chemical fertilizers. The amount of fertilizers ranks first in the world, and the low utilization rate of chemical fertilizers is the main problem. Nitrogen fertilizers are easily lost after being applied to the soil. The ways of loss include leaching, gas loss and fixation. The utilization rate of nitrogen fertilizer is only about 30%, and a large amount of losses. China loses 12-14 million tons of nitrogen fertilizer through leaching and volatilization every year, causing huge waste. Potassium fertilizer can also be lost through leaching and runoff in the soil, and its utili...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/04C05G5/00C05F11/02A01C21/00C05G3/80
Inventor 刘兆辉江丽华林海涛郑福丽王梅宋效宗高新昊谭德水
Owner INST OF SOIL & FERTILIZER SHANDONG ACAD OF AGRI SCI
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