CN105237262A - Phosphogypsum soil improver for improving micro-ecological environment of soil and preparation method for phosphogypsum soil improver - Google Patents

Abstract

The invention discloses a phosphogypsum soil improver for improving the micro-ecological environment of soil. The phosphogypsum soil improver is prepared from the following raw materials in parts by weight: 22-24 parts of wheat bran, 8-10 parts of tea leaf powder, 7-8 parts of potassium chloride, 100-110 parts of phosphogypsum, 17-19 parts of red mud, 15-18 parts of cottonseed hulls, 2-4 parts of an EM inoculant, 4-5 parts of waste lime peel, 4-5 parts of calcium sulfate, 5-7 parts of zinc humate and a proper amount of water. Various soil beneficial bacteria are added into soil, and by taking added fermented organic matters as a nutrient source and phosphogypsum-red mud as a carrier, a stable active environment is provided for a flora, and the soil improver has a remarkable effect of regulating the microflora structure of soil and improving the quantity of fungi, bacteria and actinomycetes and the microbial activity of soil. Besides the microbial action, the improver contains a lot of nitrogen phosphorus and potassium and trace elements such as calcium and zinc, thereby providing beneficial help for enhancing the stability and disease inhibiting property of the biological system of the soil and improving the quality of the soil.

Description

A kind of phosphogypsum soil improvement agent improving soil microenvironment 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 improving soil microenvironment 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 improving soil microenvironment 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: wheat bran 22-24, tea leaf powder 8-10, Repone K 7-8, phosphogypsum 100-110, red mud 17-19, cotton seed hulls 15-18, EM microbial inoculum 2-4, discarded blue or green lemon skin 4-5, calcium sulfate 4-5, zinc humic acid 5-7, water are appropriate;

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

(1) stir after wheat bran, cotton seed hulls, tea leaf powder 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 14-18 days, fermentation heap is covered plastic film, then the 7-8 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 calcium sulfate, zinc humic acid jointly join in fermented liquid, fermented liquid is heated to 80-90 DEG C, continuous stirring 40-60 minute, fermentation chelating liquid is obtained after naturally cooling, for subsequent use;

(3) at 500-550 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, Repone K 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 35-40 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.

Soil improvement agent of the present invention with the addition of multiple soil probiotics, and it is organic for nutrition source with the fermentation added, phosphogypsum-red mud is as carrier, for flora provides the stable environment of an activation, for regulation and control structure of soil microbial community, improve fungi, bacterium and actinomycetic quantity and soil microbial activities in soil and have remarkable effect, except to except microbial process, modifying agent itself is containing a large amount of N P and K and the medium trace element such as calcium, zinc, for the stability and the Soil pathogen that strengthen soil ecosystem, improve the help that soil quality is useful.

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: wheat bran 23, tea leaf powder 9, Repone K 7, phosphogypsum 105, red mud 18, cotton seed hulls 17, EM microbial inoculum 3, discarded blue or green lemon skin 4, calcium sulfate 5, zinc humic acid 6, water are appropriate;

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

(1) stir after wheat bran, cotton seed hulls, tea leaf powder 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 16 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 calcium sulfate, zinc humic acid jointly join in fermented liquid, fermented liquid is heated to 85 DEG C, continuous stirring 50 minutes, obtains fermentation chelating liquid after naturally cooling, for subsequent use;

(3) calcine 25 minutes at 540 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, Repone K 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)	593	643
The average available phosphorus contents of soil (mg/kg)	55.16	65.26
			The average quick-acting potassium content of soil (mg/kg)	154.36	167.45
The average alkali-hydrolyzable nitrogen content (mg/kg) of soil	35.99	37.75
			Disease incidence (%)	7.8	2.8

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. one kind is improved the phosphogypsum soil improvement agent of soil microenvironment, it is characterized in that, be made up of the raw material of following weight part: wheat bran 22-24, tea leaf powder 8-10, Repone K 7-8, phosphogypsum 100-110, red mud 17-19, cotton seed hulls 15-18, EM microbial inoculum 2-4, discarded blue or green lemon skin 4-5, calcium sulfate 4-5, zinc humic acid 5-7, water are appropriate.

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

(1) stir after wheat bran, cotton seed hulls, tea leaf powder 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 14-18 days, fermentation heap is covered plastic film, then the 7-8 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 calcium sulfate, zinc humic acid jointly join in fermented liquid, fermented liquid is heated to 80-90 DEG C, continuous stirring 40-60 minute, obtains fermentation chelating liquid after naturally cooling, for subsequent use;

(3) at 500-550 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, Repone K 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 35-40 DEG C, preserve after weighing pack.