CN108727136A - Ureaformaldehyde Synergistic composite fertilizer production technology - Google Patents
Ureaformaldehyde Synergistic composite fertilizer production technology Download PDFInfo
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- CN108727136A CN108727136A CN201810667227.XA CN201810667227A CN108727136A CN 108727136 A CN108727136 A CN 108727136A CN 201810667227 A CN201810667227 A CN 201810667227A CN 108727136 A CN108727136 A CN 108727136A
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/80—Soil conditioners
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/30—Layered or coated, e.g. dust-preventing coatings
Abstract
The invention discloses a kind of ureaformaldehyde Synergistic composite fertilizer production technology, using coated urea, Diammonium phosphate (DAP), potassium chloride bentonite Composite Hydrogels as solid material, spray ureaformaldehyde is granulated, and realizes dual control release and the controlled release of phosphate fertilizer, potash fertilizer of nitrogenous fertilizer.Ureaformaldehyde Synergistic composite fertilizer production technology products obtained therefrom provided by the invention is compared with existing product, with epigranular, dust is few, appearance is mellow and full, prevented from caking, nutrients release is uniform, the period is long, not easily run off, discharge completely, N, P, K fertilizer utilization rate is improved, higher validity is all maintained in each period nitrogen, phosphorus, the potassium nutrition of plant growth, and it can completely be decomposed by microorganism, be noresidue, environmentally friendly, can also improve edaphon flora, prevent it is hardened, meet development green ecological agricultural requirement.
Description
Technical field
The present invention relates to composite fertilizer's technical fields, and in particular to a kind of ureaformaldehyde Synergistic composite fertilizer production technology.
Background technology
China consumes the chemical fertilizer for accounting for world's total amount 32% with the soil for accounting for the whole world 9% at present, and unit area fertilizer application amount is
The three times of world average level are more, and chemical fertilizer nutrient utilization rate is relatively low always, and this season utilization rate nitrogenous fertilizer of China's chemical fertilizer is only 30%
To 35%, phosphate fertilizer is 10% to 25%, and potash fertilizer is 35% to 50%.Due to improper fertilization and utilization rate of fertilizer be not high etc.,
Chemical fertilizer largely loses, and causes the huge wasting of resources, economic loss and serious environmental pollution, so improving fertilizer utilization
Rate is very urgent.
Slow release fertilizer can efficiently control nutrient releasing speed, extend fertilizer efficiency period, improve utilization rate of fertilizer to the maximum extent,
Nutrient loss is reduced, environmental pollution is reduced, reduces social resources consumption, be of great significance to agricultural sustainable development.Coating
The key technology of type slow/controlled release fertilizer is research and development and the coating technology of coated fertilizer, the best coated fertilizer of present application effect
For resinous material, nutrients release, but resin film strong inert can be steadily controlled, it is not easy to it degrades, meeting after nutrients release
There is residual film residual in the soil, stayed in the soil if a large amount of resin residual films certainly will be had after applying slow/controlled release fertilizer for many years,
Although the pollution for improving plant recovery of nutrient, reducing fertilizer to environment is likely to result in the secondary pollution to environment again.
Matrix mixed type slow/controlled release fertilizer cannot all use although nutrient can be made to play slow releasing function in the entire season of growth,
Production-increasing function can just be played by also needing to coordinate inorganic Quick-dissolving fertilizer, the complexity of access times and fertilising can increase again manually at
This.The ureaformaldehyde slow/controlled release fertilizer of chemical synthesis type belongs to organic microsolubility slow release fertilizer, and nitrogen is insoluble in water, only in soil
Under the effect of earth biological or chemical, it can just decompose slowly to inorganic nitrogen and be absorbed and used by plants, the length of fertilizer efficiency depends on urea
The length of formaldehyde molecule chain, strand is longer, and fertilizer efficiency period is also longer.Meanwhile methylene urea therein has suction-operated, it can
Promote fertilizer to be combined to form gluey chelate with soil particle, to reduce nutrient loss, can be fully absorbed by crop, is realized
The raising of utilization rate of fertilizer, but its nutrients release period be up to the several years, its nutrients release period, while nutrient cannot be accurately controlled
It is single, slow releasing function can only be played to nitrogen.
Phosphorus utilization rate in all chemical fertilizer is minimum, and phosphorus is plant growth and productivity in the nearly half arable soil in the world
Restriction factor, solubility in the soil is low, moves in the soil very weak, limits absorption of the plant to it, improves phosphorus
The fertilizer efficiency of fertilizer is to improve the emphasis of utilization rate of fertilizer.
Granulating rate is low, dust loss is serious there is also being granulated for existing ureaformaldehyde slow-release fertilizer, and filler is of high cost, easily lumps, nothing
The shortcomings of method realizes nutrient controlled release, P and K leaching loss is serious, therefore research and development granulating rate is high, prevented from caking, at low cost, fertilizer efficiency
High, nutrient controlled release ureaformaldehyde production technology is of great significance.
Invention content
For the deficiency of existing ureaformaldehyde production technology, the present invention provide a kind of granulating rate it is high, it is prevented from caking, at low cost,
The ureaformaldehyde Synergistic composite fertilizer production technology of fertilizer efficiency height, nutrient controlled release.
The purpose of the present invention is achieved through the following technical solutions：
A kind of ureaformaldehyde Synergistic composite fertilizer production technology, includes the following steps：
One, formalin is added in urea, urea is 1.3~1.6 with formaldehyde mole ratio:1, it dissolves by heating, hydrogen-oxygen is added
Change sodium and adjust pH value to 7.0~7.5, temperature is kept for 40~60 DEG C, and addition reaction 1h obtains methylol urea solution；
Two, industrial sulphuric acid or phosphoric acid are added into methylol urea solution, adjusts pH value to 4.0~4.5, stirring, condensation is instead
1h is answered, ureaformaldehyde solution for standby is obtained；
Three, urea, Diammonium phosphate (DAP), potassium chloride are weighed to be dissolved in water, stir evenly, bentonite is added and stirs into lotion, so
After sodium carboxymethylcellulose is added, continue stirring to being completely dissolved, crosslinking agent reaction be added, composite hydrogel microballoon, water is made
Flushing, drying to constant weight, obtains gel masses, is transported in rotary drum granulator, is used in case being granulated；
Four, ureaformaldehyde solution is passed through in dashpot, through prilling spry spray in rotary drum granulator on solid material bed, together
When it is another it is nozzle specially used synergy liquid is also sprayed on solid material bed, gel masses, which roll to reunite, bonds granulating, and comminutor comes out
Granule materials drying, cooling, cross scalping, cross dusting cover, packaging be finished product, wherein sieving after excessive or too small of grain shape
Grain return comminutor is granulated again.
In gel masses described in step 3 the mass fraction of each component be urea 15%~40%, Diammonium phosphate (DAP) 18%~
32%, potassium chloride 10%~15%, bentonite 15%~25%, sodium carboxymethylcellulose 4%~18%, crosslinking agent 5%~
10%.
Synergy liquid and preparation method thereof described in step 4 is：It is added modification biological charcoal, poly-aspartic-acid in water, stirring makes point
It dissipates uniformly, obtains synergy liquid；
Further, the modification biological charcoal by charcoal, nano-titanium dioxide, nano zine oxide in mass ratio 20~
30:1:1 is prepared, and preparation method is as follows：
1. charcoal is prepared with cotton stalk, carbonization temperature is 500 DEG C, carbonization time 4h, and cooling pulverizes and sieves, then passes through
It is stored for future use after ultramicro grinding；
2. taking equivalent nano-titanium dioxide, nano zine oxide soluble in water, ultrasonic disperse is proportionally added into charcoal stirring
It is uniformly evaporated in 80 DEG C of thermostat water baths, is placed in constant temperature oven and is dried to permanent quality to get modification biological charcoal for 80 DEG C.
The present invention is by preparing bentonite Composite Hydrogels, and urea, Diammonium phosphate (DAP), potassium chloride are by bentonite adsorption, this portion
Divide booty material nutrient during release will first by bentonite release, after with the extraneous factors such as osmotic pressure act on through gel duct
It is discharged into the external world, the amount that bentonite consumption increases institute's adsorption fertilizer increases, slow release effect enhancing, sodium carboxymethylcellulose and crosslinking
The dosage of agent increases, and the tridimensional network of hydrogel is closeer, and duct is smaller, and resistance when release is bigger, thus can pass through
Adjust bentonite, the amount ratio of sodium carboxymethylcellulose and crosslinking agent carrys out while realizing urea, Diammonium phosphate (DAP), potassium chloride it is controllable
Release.
There is three-D micro-nano network structure, one side to serve as nano-titanium dioxide for synergy liquid used in the present invention, charcoal
With the carrier of nano zine oxide, Particulate accumulation is avoided, is sprayed synergy liquid simultaneously with ureaformaldehyde in preparation process, in synergy liquid
Charcoal also acts as the effect for preventing fertiliser granulates from bonding, and on the other hand has quick absorbent function, can increase the solvability of water,
Root system of plant can be promoted to absorb nutrient and moisture, realize volume increase；The nano-titanium dioxide loaded can carry out photocatalysis drop
Pesticide residue is solved, the adsorption capacity of charcoal is enhanced, charcoal is made to provide habitat for microorganism, increases microorganism mineral point
Solution and polysaccharide secretion, nano-titanium dioxide can also adjust plant root growth hormone secretion, improve the performance of soil；Nano oxygen
Change zinc as phosphorus decomposing enzyme, the activity of enzyme can be enhanced, promotes absorption of the crop to phosphorus, make the chlorophyll content and root volume of crop
Increase, is conducive to the microbial population of soil conservation health.Poly-aspartic-acid can effectively control nitrogen and convert in the soil
And migration, it reduces and is lost in, to improve utilization rate of fertilizer, reduce fertilizer amount, promote plant growth.
It can be adsorbed on soil after the product application that ureaformaldehyde Synergistic composite fertilizer production technology provided by the invention is prepared
In, the leaching loss of N, P, K fertilizer is substantially reduced, while bentonite Composite Hydrogels can realize the controlled release of a variety of nutrients,
Compared with existing product, N, P, K fertilizer utilization rate are improved, and are all kept in each period nitrogen, phosphorus, the potassium nutrition of plant growth
There is higher validity.
The present invention has the advantages that compared with prior art：
(1) by synergy liquid and ureaformaldehyde solution in ureaformaldehyde Synergistic composite fertilizer production technology granulation process provided by the invention
Mixing spray, product is prevented from caking, eliminates the operation that fertilizer is mixed with synergist during applying fertilizer, present invention process production
Composite fertilizer is that hydrogel and ureaformaldehyde dual control release mechanism reach identical the used fertilizer of effect of increasing production compared with existing fertilizer
Amount greatly reduces, and saves the human and material resources of agricultural production process, and utilization rate of nitrogen fertilizer improves 71.4%, and phosphate fertilizer utilization efficiency improves
46.2%, potassium utilization rate improves 26.9%, all maintains higher validity in each period nitrogen, phosphorus, potassium nutrition, and can carry
The quality of high agricultural product；
(2) ureaformaldehyde Synergistic composite fertilizer production technology provided by the invention controls the release of N fertilizer using two kinds of approach, a kind of
It is to be wrapped in bentonite Composite Hydrogels with form of urea, realizes controlled release, disclosure satisfy that plant growth initial stage larger N
Fertile demand, another kind, which is the N fertilizer in ureaformaldehyde, gradually to be discharged under external influence, can be provided for a long term nutrient, reach agriculture
Crop yield effect；
(3) ureaformaldehyde Synergistic composite fertilizer production technology products obtained therefrom provided by the invention has epigranular, dust few, outer
See mellow and full, prevented from caking, nutrients release is uniform, the period is long, not easily run off, discharge completely, the high feature of utilization rate, and can quilt
Microorganism decomposes completely, noresidue, environmentally friendly, moreover it is possible to improve edaphon flora, prevent hardened, meet development green
The requirement of the ecological agriculture.
Specific implementation mode
Further to illustrate the technological means and its effect of the invention taken, carried out below in conjunction with specific embodiment detailed
Thin description.
Embodiment 1
A kind of ureaformaldehyde Synergistic composite fertilizer production technology, includes the following steps：
One, formalin is added in urea, urea is 1.3 with formaldehyde mole ratio:1, it dissolves by heating, sodium hydroxide tune is added
PH value is saved to 7.0~7.5, temperature is kept for 40~60 DEG C, and addition reaction 1h obtains methylol urea solution；
Two, industrial sulphuric acid or phosphoric acid are added into methylol urea solution, adjusts pH value to 4.0~4.5, stirring, condensation is instead
1h is answered, ureaformaldehyde solution for standby is obtained；
Three, urea, Diammonium phosphate (DAP), potassium chloride are weighed to be dissolved in water, stir evenly, bentonite is added and stirs into lotion, so
After sodium carboxymethylcellulose is added, continue stirring to being completely dissolved, crosslinking agent reaction be added, composite hydrogel microballoon, water is made
Flushing, drying to constant weight, obtains gel masses, is transported in rotary drum granulator, is used in case being granulated；
Four, ureaformaldehyde solution is passed through in dashpot, through prilling spry spray in rotary drum granulator on solid material bed, together
When it is another it is nozzle specially used synergy liquid is also sprayed on solid material bed, gel masses, which roll to reunite, bonds granulating, and comminutor comes out
Granule materials drying, cooling, cross scalping, cross dusting cover, packaging be finished product, wherein sieving after excessive or too small of grain shape
Grain return comminutor is granulated again.
The mass fraction of each component is urea 32%, Diammonium phosphate (DAP) 28%, potassium chloride in gel masses described in step 3
12%, bentonite 19%, sodium carboxymethylcellulose 4%, crosslinking agent 5%.
Synergy liquid and preparation method thereof described in step 4 is：It is added modification biological charcoal, poly-aspartic-acid in water, stirring makes point
It dissipates uniformly, obtains synergy liquid；
Further, the modification biological charcoal by charcoal, nano-titanium dioxide, nano zine oxide in mass ratio 20~
30:1:1 is prepared, and preparation method is as follows：
1. charcoal is prepared with cotton stalk, carbonization temperature is 500 DEG C, carbonization time 4h, and cooling pulverizes and sieves, then passes through
It is stored for future use after ultramicro grinding；
2. taking equivalent nano-titanium dioxide, nano zine oxide soluble in water, ultrasonic disperse is proportionally added into charcoal stirring
It is uniformly evaporated in 80 DEG C of thermostat water baths, is placed in constant temperature oven and is dried to permanent quality to get modification biological charcoal for 80 DEG C.
Embodiment 2
A kind of ureaformaldehyde Synergistic composite fertilizer production technology, includes the following steps：
One, formalin is added in urea, urea is 1.3~1.6 with formaldehyde mole ratio:1, it dissolves by heating, hydrogen-oxygen is added
Change sodium and adjust pH value to 7.0~7.5, temperature is kept for 40~60 DEG C, and addition reaction 1h obtains methylol urea solution；
Two, industrial sulphuric acid or phosphoric acid are added into methylol urea solution, adjusts pH value to 4.0~4.5, stirring, condensation is instead
1h is answered, ureaformaldehyde solution for standby is obtained；
Three, urea, Diammonium phosphate (DAP), potassium chloride are weighed to be dissolved in water, stir evenly, bentonite is added and stirs into lotion, so
After sodium carboxymethylcellulose is added, continue stirring to being completely dissolved, crosslinking agent reaction be added, composite hydrogel microballoon, water is made
Flushing, drying to constant weight, obtains gel masses, is transported in rotary drum granulator, is used in case being granulated；
Four, ureaformaldehyde solution is passed through in dashpot, through prilling spry spray in rotary drum granulator on solid material bed, together
When it is another it is nozzle specially used synergy liquid is also sprayed on solid material bed, gel masses, which roll to reunite, bonds granulating, and comminutor comes out
Granule materials drying, cooling, cross scalping, cross dusting cover, packaging be finished product, wherein sieving after excessive or too small of grain shape
Grain return comminutor is granulated again.
The mass fraction of each component is urea 15%, Diammonium phosphate (DAP) 18%, potassium chloride in gel masses described in step 3
14%, bentonite 25%, sodium carboxymethylcellulose 18%, crosslinking agent 10%.
Synergy liquid and preparation method thereof described in step 4 is：It is added modification biological charcoal, poly-aspartic-acid in water, stirring makes point
It dissipates uniformly, obtains synergy liquid；
Further, the modification biological charcoal by charcoal, nano-titanium dioxide, nano zine oxide in mass ratio 20~
30:1:1 is prepared, and preparation method is as follows：
1. charcoal is prepared with cotton stalk, carbonization temperature is 500 DEG C, carbonization time 4h, and cooling pulverizes and sieves, then passes through
It is stored for future use after ultramicro grinding；
2. taking equivalent nano-titanium dioxide, nano zine oxide soluble in water, ultrasonic disperse is proportionally added into charcoal stirring
It is uniformly evaporated in 80 DEG C of thermostat water baths, is placed in constant temperature oven and is dried to permanent quality to get modification biological charcoal for 80 DEG C.
Embodiment 3
A kind of ureaformaldehyde Synergistic composite fertilizer production technology, includes the following steps：
One, formalin is added in urea, urea is 1.3~1.6 with formaldehyde mole ratio:1, it dissolves by heating, hydrogen-oxygen is added
Change sodium and adjust pH value to 7.0~7.5, temperature is kept for 40~60 DEG C, and addition reaction 1h obtains methylol urea solution；
Two, industrial sulphuric acid or phosphoric acid are added into methylol urea solution, adjusts pH value to 4.0~4.5, stirring, condensation is instead
1h is answered, ureaformaldehyde solution for standby is obtained；
Three, urea, Diammonium phosphate (DAP), potassium chloride are weighed to be dissolved in water, stir evenly, bentonite is added and stirs into lotion, so
After sodium carboxymethylcellulose is added, continue stirring to being completely dissolved, crosslinking agent reaction be added, composite hydrogel microballoon, water is made
Flushing, drying to constant weight, obtains gel masses, is transported in rotary drum granulator, is used in case being granulated；
Four, ureaformaldehyde solution is passed through in dashpot, through prilling spry spray in rotary drum granulator on solid material bed, together
When it is another it is nozzle specially used synergy liquid is also sprayed on solid material bed, gel masses, which roll to reunite, bonds granulating, and comminutor comes out
Granule materials drying, cooling, cross scalping, cross dusting cover, packaging be finished product, wherein sieving after excessive or too small of grain shape
Grain return comminutor is granulated again.
The mass fraction of each component is urea 40%, Diammonium phosphate (DAP) 18%, potassium chloride in gel masses described in step 3
13%, bentonite 15%, sodium carboxymethylcellulose 4%, crosslinking agent 10%.
Synergy liquid and preparation method thereof described in step 4 is：It is added modification biological charcoal, poly-aspartic-acid in water, stirring makes point
It dissipates uniformly, obtains synergy liquid；
Further, the modification biological charcoal by charcoal, nano-titanium dioxide, nano zine oxide in mass ratio 20~
30:1:1 is prepared, and preparation method is as follows：
1. charcoal is prepared with cotton stalk, carbonization temperature is 500 DEG C, carbonization time 4h, and cooling pulverizes and sieves, then passes through
It is stored for future use after ultramicro grinding；
2. taking equivalent nano-titanium dioxide, nano zine oxide soluble in water, ultrasonic disperse is proportionally added into charcoal stirring
It is uniformly evaporated in 80 DEG C of thermostat water baths, is placed in constant temperature oven and is dried to permanent quality to get modification biological charcoal for 80 DEG C.
Embodiment 4
A kind of ureaformaldehyde Synergistic composite fertilizer production technology, includes the following steps：
One, formalin is added in urea, urea is 1.3~1.6 with formaldehyde mole ratio:1, it dissolves by heating, hydrogen-oxygen is added
Change sodium and adjust pH value to 7.0~7.5, temperature is kept for 40~60 DEG C, and addition reaction 1h obtains methylol urea solution；
Two, industrial sulphuric acid or phosphoric acid are added into methylol urea solution, adjusts pH value to 4.0~4.5, stirring, condensation is instead
1h is answered, ureaformaldehyde solution for standby is obtained；
Three, urea, Diammonium phosphate (DAP), potassium chloride are weighed to be dissolved in water, stir evenly, bentonite is added and stirs into lotion, so
After sodium carboxymethylcellulose is added, continue stirring to being completely dissolved, crosslinking agent reaction be added, composite hydrogel microballoon, water is made
Flushing, drying to constant weight, obtains gel masses, is transported in rotary drum granulator, is used in case being granulated；
Four, ureaformaldehyde solution is passed through in dashpot, through prilling spry spray in rotary drum granulator on solid material bed, together
When it is another it is nozzle specially used synergy liquid is also sprayed on solid material bed, gel masses, which roll to reunite, bonds granulating, and comminutor comes out
Granule materials drying, cooling, cross scalping, cross dusting cover, packaging be finished product, wherein sieving after excessive or too small of grain shape
Grain return comminutor is granulated again.
The mass fraction of each component is urea 30%, Diammonium phosphate (DAP) 19%, potassium chloride in gel masses described in step 3
13%, bentonite 18%, sodium carboxymethylcellulose 13%, crosslinking agent 7%.
Synergy liquid and preparation method thereof described in step 4 is：It is added modification biological charcoal, poly-aspartic-acid in water, stirring makes point
It dissipates uniformly, obtains synergy liquid；
Further, the modification biological charcoal by charcoal, nano-titanium dioxide, nano zine oxide in mass ratio 20~
30:1:1 is prepared, and preparation method is as follows：
1. charcoal is prepared with cotton stalk, carbonization temperature is 500 DEG C, carbonization time 4h, and cooling pulverizes and sieves, then passes through
It is stored for future use after ultramicro grinding；
2. taking equivalent nano-titanium dioxide, nano zine oxide soluble in water, ultrasonic disperse is proportionally added into charcoal stirring
It is uniformly evaporated in 80 DEG C of thermostat water baths, is placed in constant temperature oven and is dried to permanent quality to get modification biological charcoal for 80 DEG C.
Comparative example
In addition to being not added with synergy liquid, remaining operation is the same as embodiment 3.
Application effect
Test method：Illumination is sufficient, topography is smooth, soil fertility is medium plot is selected as experimental field, it will experimental field
12 pieces are divided into, (1)~(12) are numbered, wherein (1) and (2) is control group, using commercially available common ureaformaldehyde composite fertilizer；(3)~
(10) it is test group, using Examples 1 to 4 products obtained therefrom；(11) and (12) are contrast groups, right using comparative example products obtained therefrom
It is 40kg per acre according to group amount of application, test group and contrast groups amount of application are 20kg per acre, remaining farming operations all same.
Wheat is tested
1 wheat test result of table
As shown in Table 1, for the product that present invention process is prepared compared with common ureaformaldehyde composite fertilizer, amount of application reduces one
Times, moreover it is possible to reach apparent wheat increase yield effect, increases production 60kg or more per acre；Pass through the effect of increasing production of test group and contrast groups ratio
Compared with, it is known that synergy liquid further increases effect of increasing production by improving utilization rate of fertilizer.
Corn trials
2 corn trials result of table
As shown in Table 2, for the product that present invention process is prepared compared with common ureaformaldehyde composite fertilizer, amount of application reduces one
Times, moreover it is possible to reach apparent corn yield increasing effect, increases production 60kg or more per acre；Pass through the effect of increasing production of test group and contrast groups ratio
Compared with, it is known that synergy liquid further increases effect of increasing production by improving utilization rate of fertilizer.
Plant recovery of nutrient experimental study
It is above-mentioned as shown in table 3 using the corn nitrogen of different fertilizer type, phosphorus, potash fertilizer uptake and utilization rate.Wherein nitrogen,
Phosphorus, potassium uptake=stalk dry weight × stalk nitrogen, phosphorus, potassium content+fruit dry weight × fruit nitrogen, phosphorus, potassium content；Practical nitrogen absorbs
Amount=apply different fertilizer processing nitrogen absorbing amount-do not apply soil fertility quality nitrogen absorbing amount.
3 corn nutrients uptake amounts of table and utilization rate
From table 3 it can be seen that the product that present invention process is prepared is compared with common ureaformaldehyde composite fertilizer, corn pair
Nitrogen, phosphorus, potash fertilizer uptake are above common ureaformaldehyde composite fertilizer, and utilization rate also greatly improves；Pass through test group and contrast groups
Nutrients uptake amounts compared with utilization rate, it is known that the present invention used in synergy liquid energy significantly improve utilization rate of fertilizer.
To sum up, ureaformaldehyde Synergistic composite fertilizer production technology provided by the invention, preparation process is simple, dual control sustained release realizes N,
P, K fertilizer controlled release is more advantageous to the utilization of fertilizer efficiency performance and each ingredient, reduces the nutrient loss after application, products obtained therefrom energy
Crop yield is enough significantly improved, the quality of agricultural product is improved, improves disease-resistant crops ability.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, ability
Other modifications or equivalent replacement that domain those of ordinary skill makes technical scheme of the present invention, without departing from skill of the present invention
The spirit and scope of art scheme, are intended to be within the scope of the claims of the invention.
Claims (5)
1. a kind of ureaformaldehyde Synergistic composite fertilizer production technology, which is characterized in that include the following steps：
One, formalin is added in urea, urea is 1.3 ~ 1.6 with formaldehyde mole ratio:1, it dissolves by heating, sodium hydroxide tune is added
PH value is saved to 7.0 ~ 7.5, temperature is kept for 40 ~ 60 DEG C, and 1 h of addition reaction obtains methylol urea solution；
Two, industrial sulphuric acid or phosphoric acid are added into methylol urea solution, adjusts pH value to 4.0 ~ 4.5, stirs, 1 h of condensation reaction,
Obtain ureaformaldehyde solution for standby；
Three, urea, Diammonium phosphate (DAP), potassium chloride are weighed to be dissolved in water, stir evenly, bentonite is added and stirs into lotion, then adds
Enter sodium carboxymethylcellulose, continues stirring to being completely dissolved, crosslinking agent is added and reacts, obtained composite hydrogel microballoon, water flushing,
Drying to constant weight, obtains gel masses, is transported in rotary drum granulator, is used in case being granulated；
Four, ureaformaldehyde solution is passed through in dashpot, through prilling spry spray in rotary drum granulator on solid material bed, and meanwhile it is another
One it is nozzle specially used synergy liquid is also sprayed on solid material bed, gel masses roll reunite bond granulating, comminutor come out
Grain material drying, cooling, cross scalping, cross dusting cover, packaging is finished product, wherein the grain shape after sieving is excessive or crosses little particle and returns
Comminutor is returned to be granulated again.
2. ureaformaldehyde Synergistic composite fertilizer production technology according to claim 1, which is characterized in that jello described in step 3
In material the mass fraction of each component be urea 15% ~ 40%, Diammonium phosphate (DAP) 18% ~ 32%, potassium chloride 10% ~ 15%, bentonite 15% ~
25%, sodium carboxymethylcellulose 4% ~ 18%, crosslinking agent 5% ~ 10%.
3. ureaformaldehyde Synergistic composite fertilizer production technology according to claim 1, which is characterized in that synergy liquid described in step 4
Preparation method is：Modification biological charcoal, poly-aspartic-acid are added in water, stirring makes to be uniformly dispersed, and obtains synergy liquid.
4. ureaformaldehyde Synergistic composite fertilizer production technology according to claim 3, which is characterized in that the modification biological charcoal by
Charcoal, nano-titanium dioxide, nano zine oxide in mass ratio 20 ~ 30:1:1 is prepared, and preparation method is as follows：
1. charcoal is prepared with cotton stalk, carbonization temperature is 500 DEG C, 4 h of carbonization time, and cooling pulverizes and sieves, then through ultra micro
It is stored for future use after crushing；
2. taking equivalent nano-titanium dioxide, nano zine oxide soluble in water, ultrasonic disperse is proportionally added into charcoal and stirs evenly
It is evaporated in 80 DEG C of thermostat water baths, is placed in constant temperature oven and is dried to permanent quality to get modification biological charcoal for 80 DEG C.
5. according to any obtained product of ureaformaldehyde Synergistic composite fertilizer production technology of claim 1 ~ 4.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN115160067A (en) * | 2022-07-26 | 2022-10-11 | 中国热带农业科学院橡胶研究所 | Phosphate-based large-particle fertilizer and application method thereof on bananas and rubber |
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