CN105237269A - Phosphogypsum soil conditioner capable of improving soilmass structure and preparation method thereof - Google Patents

Abstract

The invention discloses a phosphogypsum soil conditioner capable of improving a soilmass structure. The soil conditioner is prepared from the following raw materials by weight: 19 to 21 parts of tobacco residues, 10 to 12 parts of potassium dihydrogen phosphate, 4 to 6 parts of ferrous sulfate, 17 to 23 parts of red mud, 3 to 4 parts of EM microbial inoculum, 4 to 5 parts of sodium nitrate, 125 to 135 parts of phosphogypsum, 5 to 7 parts of lime, 24 to 26 parts of straw powder, 16 to 18 parts beer residues, 3 to 5 parts of abandoned lime peels and a proper amount of water. The phosphogypsum soil conditioner provided by the invention can reduce topsoil acidity, increase the concentrations of exchangeable calcium and magnesium ions of soil plough horizon, effectively alleviate aluminum toxicity and other heavy metal harms and improve the soilmass structure, so nutrient cycling ability and biological activity of the soil can be enhanced, and growth environment of a plant root system can be improved; thus, growth of the plant root system and absorption to nutrient elements are promoted; vegetative growth and reproductive growth of plants are improved; and yield and quality of crops are increased.

Description

Phosphogypsum soil improvement agent of a kind of conditioned soil body structure 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 and preparation method thereof of conditioned soil body structure.

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 phosphogypsum soil improvement agent of a kind of conditioned soil body structure 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: scarp 19-21, potassium primary phosphate 10-12, ferrous sulfate 4-6, red mud 17-23, EM microbial inoculum 3-4, SODIUMNITRATE 4-5, phosphogypsum 125-135, lime 5-7, straw powder 24-26, beer residue 16-18, discarded blue or green lemon skin 3-5, water are appropriate;

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

(1) stir after scarp, straw powder, beer residue 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 45-55%, after ferment in the open 16-18 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, obtain fermented liquid and ferment slag, discarded blue or green lemon skin is pulverized levigate after and ferrous sulfate, SODIUMNITRATE jointly join in fermented liquid, fermented liquid is heated to 70-80 DEG C, continuous stirring 60-80 minute, fermentation chelating liquid is obtained after naturally cooling, for subsequent use;

(3) at 450-500 DEG C, 20-40 minute is calcined after phosphogypsum powder comminution is thin, obtain phosphogypsum powder, dry at again red mud being placed in 180-200 DEG C and wear into fine powder, by phosphogypsum powder, lime, red mud powder, potassium primary phosphate 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 30-40 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 can reduce table mud acid degree, increase soil plough horizon exchangeable calcium magnesium ion concentration, effective alleviation aluminium poison and other Heavy Metal Pollutions, conditioned soil body structure, soil nutrient circulation ability and biological activity are improved, and plant root growth environment is improved, thus promotes root growth and the absorption to nutritive element, improve plant vegetative growth and reproductive growth, improve crop yield and quality.

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: scarp 20, potassium primary phosphate 11, ferrous sulfate 5, red mud 20, EM microbial inoculum 3, SODIUMNITRATE 4, phosphogypsum 130, lime 6, straw powder 25, beer residue 17, discarded blue or green lemon skin 4, water are appropriate;

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

(1) stir after scarp, straw powder, beer residue 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 50%, ferment in the open is after 17 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 ferrous sulfate, SODIUMNITRATE jointly join in fermented liquid, fermented liquid is heated to 75 DEG C, continuous stirring 70 minutes, obtains fermentation chelating liquid after naturally cooling, for subsequent use;

(3) calcine 30 minutes at 480 DEG C after phosphogypsum powder comminution is thin, obtain phosphogypsum powder, then dry at red mud is placed in 190 DEG C and wear into fine powder, by phosphogypsum powder, lime, red mud powder, potassium primary phosphate 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 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)	604	657
The average available phosphorus contents of soil (mg/kg)	57.92	62.35
			The average quick-acting potassium content of soil (mg/kg)	156.02	160.09
The average alkali-hydrolyzable nitrogen content (mg/kg) of soil	35.09	39.75
			Disease incidence (%)	5.5	1.4

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. the phosphogypsum soil improvement agent of a conditioned soil body structure, it is characterized in that, be made up of the raw material of following weight part: scarp 19-21, potassium primary phosphate 10-12, ferrous sulfate 4-6, red mud 17-23, EM microbial inoculum 3-4, SODIUMNITRATE 4-5, phosphogypsum 125-135, lime 5-7, straw powder 24-26, beer residue 16-18, discarded blue or green lemon skin 3-5, water are appropriate.

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

(1) stir after scarp, straw powder, beer residue 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 45-55%, after ferment in the open 16-18 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 ferrous sulfate, SODIUMNITRATE jointly join in fermented liquid, fermented liquid is heated to 70-80 DEG C, continuous stirring 60-80 minute, obtains fermentation chelating liquid after naturally cooling, for subsequent use;

(3) at 450-500 DEG C, 20-40 minute is calcined after phosphogypsum powder comminution is thin, obtain phosphogypsum powder, dry at again red mud being placed in 180-200 DEG C and wear into fine powder, by phosphogypsum powder, lime, red mud powder, potassium primary phosphate 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 30-40 DEG C, preserve after weighing pack.