CN105237263A - Phosphogypsum soil improver for improving soil fertility and preparation method for phosphogypsum soil improver - Google Patents

Abstract

The invention discloses a phosphogypsum soil improver for improving soil fertility. The phosphogypsum soil improver for improving soil fertility is prepared from the following raw materials in parts by weight: 13-15 parts of peanut meal, 8-10 parts of ammonium chloride, 1-3 parts of zinc sulfate, 2-3 parts of magnesium carbonate, 2-4 parts of an EM inoculant, 3-5 parts of waste lime peel, 120-130 parts of phosphogypsum, 9-11 parts of shiitake mushroom residues, 12-14 parts of rice straw ash, 16-19 parts of red mud and a proper amount of water. The phosphogypsum soil improver disclosed by the invention can be used for effectively improving fields which are depleted in soil as chemical fertilizers are used for a long time. By replacing aluminum in soil with calcium in the improver phosphogypsum, ion exchange on SO4<2-> and OH<-> occurs, thereby providing more necessary elements such as calcium and sulfur for plants, optimizing the physical and chemical properties of soil, promoting growth of plant root systems and providing a guarantee for high yield of crops.

Description

A kind of phosphogypsum soil improvement agent of increasing soil fertility and preparation method thereof

Technical field

The present invention relates to a kind of soil improvement agent technical field, particularly a kind of phosphogypsum soil improvement agent of increasing soil fertility and preparation method thereof.

Background technology

China is a large agricultural country, along with the development of national economy, agricultural continues to increase the demand of phosphate fertilizer, facilitate developing rapidly of Phosphate Fertilizer Industry, but the simultaneously also a large amount of phosphogypsum of by-product in Wet-process Phosphoric Acid Production, along with the increase of phosphate fertilizer production, the problems such as phosphogypsum contaminate environment, land occupation are also further outstanding.Therefore, the resource utilization of phosphogypsum recycling has important practical significance, and is the needs solving environmental pollution, be also develop a circular economy, the needs of efficent use of resources.

For this reason, current inventor provides a kind of soil improvement agent using phosphogypsum as main raw material(s) and preparation method thereof, rational production technique is utilized to avoid the destruction of phosphogypsum to environment, take full advantage of the element useful to crop soil existed in phosphogypsum simultaneously, strengthen soil quality, delay the degeneration of soil, reduce the pollution of heavy metal, it is made to be widely used in agricultural as the available resource of one, for structure resource-conserving, environmentally friendly harmonious society contribute.

Summary of the invention

The present invention compensate for the deficiencies in the prior art, provides a kind of phosphogypsum soil improvement agent of increasing soil fertility and preparation method thereof.

Technical scheme of the present invention is as follows:

Fertilizer of the present invention is made up of the raw material of following weight part: groundnut meal 13-15, ammonium chloride 8-10, zinc sulfate 1-3, magnesiumcarbonate 2-3, EM microbial inoculum 2-4, discarded blue or green lemon skin 3-5, phosphogypsum 120-130, Lentinus Edodes fungus chaff 9-11, rice-straw ash 12-14, red mud 16-19, water are appropriate;

The concrete steps of the preparation of described soil improvement agent are as follows:

(1) stir after groundnut meal, Lentinus Edodes fungus chaff, rice-straw ash mixing and drop in fermentation vat, EM microbial inoculum and suitable quantity of water is added again in fermentation vat, fermentation heap water content is kept to be 40-50%, after ferment in the open 13-16 days, fermentation heap is covered plastic film, ferment 6-8 days again, obtains tunning for subsequent use;

(2) step one gained tunning is squeezed, obtain fermented liquid and ferment slag, discarded blue or green lemon skin is pulverized levigate after and zinc sulfate, magnesiumcarbonate jointly join in fermented liquid, fermented liquid is heated to 70-90 DEG C, continuous stirring 30-50 minute, fermentation chelating liquid is obtained after naturally cooling, for subsequent use;

(3) at 400-500 DEG C, calcine 20-30 minute after phosphogypsum powder comminution is thin, obtain phosphogypsum powder, then dry at red mud is placed in 150-250 DEG C and wear into fine powder, by phosphogypsum powder, red mud powder, ammonium chloride and step 2 gained ferment slag mixing granulation;

(4) by step 2 gained fermentation chelating liquid and leftover materials mixing, after stirring, by high pressure spray nozzle, atomizing spray is carried out to step 3 gained particle, finally that particle is air-dry with gas blower at 35-45 DEG C, preserve after weighing pack.

The using method of modifying agent of the present invention is used or is used at soil shallow-layer after mixing with fertilizer, and every mu of consumption is 200-300kg.

Beneficial effect of the present invention:

Organic composition can be removed to the calcining of phosphogypsum and red mud in preparation process, avoid secondary pollution, in phosphogypsum, multiple acidic component can be complementary with the strong basicity of red mud simultaneously, regulate the pH value of soil improvement agent, the two can not only improve soil property after being combined, regulation and control P in soil H value, it contains the compositions such as higher Si, Ca, K, P and the required trace element of tens of kinds of farm crop also can promote that crop forms silicified cell, strengthen plant physiology usefulness and anti-adversity, effective raising crop yield, improves the quality of crop.

The use of discarded blue or green lemon skin can increase the content of modifying agent soil ulmin on the one hand, improve reclamation result, its a large amount of citric acids contained can promote the sequestering action of metal-salt and fermented liquid on the other hand, generate the multiple Chelating state nutritive element being easy to plant absorption, increase soil fertility.

Phosphogypsum soil improvement agent of the present invention effectively can improve the field that life-time service chemical fertilizer causes soil depletion, exchanges the aluminium in soil, make SO by the calcium in modifying agent phosphogypsum ₄ ^2-with OH ^-there is ion-exchange, thus provide the bioelements such as more calcium, sulphur for plant, optimize the physico-chemical property of soil, promote the growth of root system of plant, for the high yield of crop provides safeguard.

Specific embodiments

Below in conjunction with following embodiment, the present invention is described in further detail:

The raw material taking following weight (kg) is made: groundnut meal 14, ammonium chloride 9, zinc sulfate 2, magnesiumcarbonate 3, EM microbial inoculum 3, discarded blue or green lemon skin 4, phosphogypsum 125, Lentinus Edodes fungus chaff 10, rice-straw ash 13, red mud 18, water are appropriate;

The concrete steps of the preparation of described soil improvement agent are as follows:

(1) stir after groundnut meal, Lentinus Edodes fungus chaff, rice-straw ash mixing and drop in fermentation vat, then add EM microbial inoculum and suitable quantity of water in fermentation vat, keeping fermentation heap water content to be 45%, ferment in the open is after 15 days, fermentation heap is covered plastic film, then ferments 7 days, obtain tunning for subsequent use;

(2) step one gained tunning is squeezed, obtains fermented liquid and ferment slag, discarded blue or green lemon skin is pulverized levigate after and zinc sulfate, magnesiumcarbonate jointly join in fermented liquid, fermented liquid is heated to 80 DEG C, continuous stirring 40 minutes, obtains fermentation chelating liquid after naturally cooling, for subsequent use;

(3) calcine 25 minutes at 450 DEG C after phosphogypsum powder comminution is thin, obtain phosphogypsum powder, then dry at red mud is placed in 200 DEG C and wear into fine powder, by phosphogypsum powder, red mud powder, ammonium chloride and step 2 gained ferment slag mixing granulation;

(4) by step 2 gained fermentation chelating liquid and leftover materials mixing, after stirring, by high pressure spray nozzle, atomizing spray is carried out to step 3 gained particle, finally that particle is air-dry with gas blower at 40 DEG C, preserve after weighing pack.

In order to further illustrate using value of the present invention, contriver have chosen one piece of rice test field rice cultivation, be divided into 2 parts of equal areas, before rice cultivation, first portion applies phosphogypsum soil improvement agent of the present invention as experimental group wherein, another part as a control group, then applies the paddy rice Special basal fertilizer of equivalent simultaneously to two groups, carry out fertilizer efficiency mensuration after rice growing every 30 days to the soil of two groups, add up output and disease incidence after rice harves, data are as follows again:

Project	Control group	Experimental group
			Paddy rice mean yield (kg/ mu)	614	636
The average available phosphorus contents of soil (mg/kg)	54.79	66.18
			The average quick-acting potassium content of soil (mg/kg)	157.14	169.91
The average alkali-hydrolyzable nitrogen content (mg/kg) of soil	34.06	39.12
			Disease incidence (%)	7.5	3.9

After above experimental data can be found out and employs phosphogypsum soil improvement agent of the present invention, during Rice Cropping, the average nutrient content of soil is all greater than control group, the pH value energy stable for extended periods of time state of soil simultaneously, its water-retentivity and nutrient preserving capability are also greatly increased, field disease and pest significantly reduces, improve the output of paddy rice, overall economic efficiency is increased dramatically.

Claims (2)

1. a phosphogypsum soil improvement agent of increasing soil fertility, it is characterized in that, be made up of the raw material of following weight part: groundnut meal 13-15, ammonium chloride 8-10, zinc sulfate 1-3, magnesiumcarbonate 2-3, EM microbial inoculum 2-4, discarded blue or green lemon skin 3-5, phosphogypsum 120-130, Lentinus Edodes fungus chaff 9-11, rice-straw ash 12-14, red mud 16-19, water are appropriate.

2. phosphogypsum soil improvement agent of increasing soil fertility according to claim 1, it is characterized in that, the concrete steps of preparation method are as follows:

(1) stir after groundnut meal, Lentinus Edodes fungus chaff, rice-straw ash mixing and drop in fermentation vat, then add EM microbial inoculum and suitable quantity of water in fermentation vat, keeping fermentation heap water content to be 40-50%, after ferment in the open 13-16 days, fermentation heap is covered plastic film, then the 6-8 days that ferments, obtain tunning for subsequent use;

(2) step one gained tunning is squeezed, obtains fermented liquid and ferment slag, discarded blue or green lemon skin is pulverized levigate after and zinc sulfate, magnesiumcarbonate jointly join in fermented liquid, fermented liquid is heated to 70-90 DEG C, continuous stirring 30-50 minute, obtains fermentation chelating liquid after naturally cooling, for subsequent use;

(3) at 400-500 DEG C, calcine 20-30 minute after phosphogypsum powder comminution is thin, obtain phosphogypsum powder, then dry at red mud is placed in 150-250 DEG C and wear into fine powder, by phosphogypsum powder, red mud powder, ammonium chloride and step 2 gained ferment slag mixing granulation;

(4) by step 2 gained fermentation chelating liquid and leftover materials mixing, after stirring, by high pressure spray nozzle, atomizing spray is carried out to step 3 gained particle, finally that particle is air-dry with gas blower at 35-45 DEG C, preserve after weighing pack.