CN104276906A - Humic acid synergistic slow-release compound fertilizer and preparation method thereof - Google Patents
Humic acid synergistic slow-release compound fertilizer and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
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- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/90—Mixtures of one or more fertilisers with additives not having a specially fertilising activity for affecting the nitrification of ammonium compounds or urea in the soil
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05D1/00—Fertilisers containing potassium
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- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
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- 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
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Abstract
The invention discloses a humic acid synergistic slow-release compound fertilizer and a preparation method thereof and belongs to the technical field of slow-release compound fertilizers. The fertilizer is prepared from the following raw materials in parts by weight: 15-45 parts of nitrogen fertilizer, 15-35 parts of phosphorus fertilizer, 10-25 parts of potassium fertilizer, 1-10 parts of medium trace elements, 5-15 parts of biological humic acid and a controlled-release agent, wherein the nitrogen fertilizer raw material comprises urea which accounts for 8-25% of total weight, the addition of the controlled-release agent is 0.7-0.9% the weight of urea, the controlled-release agent is prepared by mixing an urease inhibitor and a nitrification inhibitor in a weight ratio of 1 to (0.5-1), and biological humic acid is prepared by fermenting crushed bagasse and animal waste by using a special microbial agent. Biological humic acid which has the advantages of small molecular weight, strong activity, good solubility and the like is added into the compound fertilizer, and the controlled-release agent and biological humic acid are combined by using a method of combining amino acid granulation and urea-based guniting, so that the fertilizer conserving and supply condition of soil is improved while the utilization rate of the fertilizer is improved.
Description
Technical field
The invention belongs to slow-release compound fertilizer technical field, particularly a kind of Humic acid synergistic type slow-release compound fertilizer and preparation method thereof.
Background technology
Chemical fertilizer plays significant effect as a kind of important agricultural material product to raising crop yield, is the indispensable production factors of modern agriculture.People use inorganic fertilizer for a long time in a large number, add that use-pattern is improper, and fertilizer interest rate with not high, cause the loss that fertilizer is a large amount of, pollutes soil and water body, farm crop resistance declines, the agriculture Sustainable development of serious threat.The problem that nitrogenous fertilizer dissolves soon, utilization ratio is low is solved by exploring the method having proposed number of chemical and physics, by adding long-acting sustained-release agent in fertilizer, the decomposition and inversion suppressing the activity of some enzyme in soil to slow down nitrogen improves an effective way of utilization rate of fertilizer.
Using in a large number of inorganic fertilizer, easily causes soil fertility to reduce, has both destroyed the acid base equilibrium of soil, result in the appearance of the problems such as soil organic matter content decline, soil compaction.Biological humic powder is a class larger molecular organics matter, to improving the soil, synergy and control corps diseases, improve quality of agricultural product, prevent soil and agricultural-food to be subject to polluting, strengthen farm crop anti-adversity ability and all there is promoter action, in general sustained slow-release fertilizer, there is good utility value, but utilization and extention is less at present.
The present invention is in order to improve the fertilizer efficiency feature of general sustained slow-release fertilizer, a kind of biological humic is added in fertilizer, this humic acids has the advantages such as little, the active strong and solvability of molecular weight is good, the method combined and this production of compound fertilizer use propylhomoserin granulation and urine base are whitewashed, control-released agent and biological humic are combined, improve soil fertilizer fertilizer condition while improving utilization rate of fertilizer, improve quality of agricultural product.
Summary of the invention
One of embodiment of the present invention object, for providing a kind of Humic acid synergistic type slow-release compound fertilizer, adds a kind of biological humic in fertilizer, and this humic acids has the advantages such as little, the active strong and solvability of molecular weight is good, and by control-released agent and biological humic combination.Object of the present invention two for providing the preparation method of this Humic acid synergistic type slow-release compound fertilizer, the method uses propylhomoserin granulation and urine base to whitewash the method combined, control-released agent and biological humic are combined, improve soil fertilizer fertilizer condition while improving utilization rate of fertilizer, improve quality of agricultural product.Described technical scheme is as follows:
On the one hand, embodiments provide a kind of Humic acid synergistic type slow-release compound fertilizer, the raw material that this Chemical Mixed Fertilizer comprises following parts by weight is made: nitrogen 15-45 part (in nitrogen), phosphorus element 15-35 part (in Vanadium Pentoxide in FLAKES), potassium element 10-25 part (in potassium oxide), medium trace element 1-10 part, biological humic 5-15 part and control-released agent etc.Wherein, nitrogen raw material comprises the urea (wrapped up by other raw materials as slow release layer, be less than the weight of nitrogen raw material) accounting for gross weight 8%-25%.Wherein, the addition of control-released agent is wrapped up by other raw materials as slow release layer in the 0.7%-0.9%(control-released agent interpolation urea of weight of urea, and in this ratio range, urea has best slow release effect).This control-released agent is mixed by the weight ratio of 1:0.5-1 by urease inhibitor and nitrification inhibitor, and wherein, urease inhibitor and nitrification inhibitor adopt commercial preparation common in chemical fertilizer.Wherein, biological humic is raw material with biomass, utilize fermentable obtained containing humic acids product, be specially broken bagasse and animal excrement are formed by special microorganism bacteria fermentation.This biological humic is rich in organic matter, and solvability is strong, and molecular weight I is directly absorbed by crop, and the various active material such as multiple amino acids, plant hormone that microorganism produces can promote root growth.Meanwhile, the humic acids contained in this biological humic has certain slow-release function, and the trace element in energy chelating soil, minimizing phosphorus fixation loss, effectively improve utilization rate of fertilizer, strengthen the resistance of crop.Wherein, this special microorganism microbial inoculum is special according to this Chemical Mixed Fertilizer.
Wherein, the nitrogen raw material in the embodiment of the present invention except urea also comprise in ammonium chloride, ammonium sulfate etc. one or more.
Wherein, the one in phosphorus element phosphoric acid one ammonium or diammonium phosphate etc. in the embodiment of the present invention.
Wherein, the potassium element raw material in the embodiment of the present invention comprises the one in Repone K or potassium sulfate etc.
Wherein, the medium trace element in the embodiment of the present invention can adopt salt or the complex compound of common medium trace element as required, and its proportioning can be determined according to GB or real needs.Preferably, the medium trace element absorbed in the embodiment of the present invention for ease of farm crop comprise in the complex compound of Ca, Mg, Zn, Mn, Fe, Cu, Mo and borax one or more.
Wherein, the preparation method of the biological humic in the embodiment of the present invention is: raw material based on the broken bagasse accounting for gross weight 60%-80%, add the chicken manure of gross weight 10%-30% or pig manure and gross weight 1%-5%pH conditioning agent, surplus is water, adjust the pH value (passing through pH adjusting agent) of mixture and moisture content (by dry and add water) simultaneously and be respectively 5.5-7.5 and 40%-50%, the inoculum size of special microorganism microbial inoculum by the 1%-10% of aforementioned mixture material gross weight is evenly mixed in mixture, heat-preservation fermentation 7-10 days under 45 DEG C of-70 DEG C of conditions, obtain the biological humic of powdery through dry and pulverizing (concrete 60-80 order excessively) after having fermented.
Wherein, the special microorganism microbial inoculum in the embodiment of the present invention comprises ACCC 11089 subtilis (Bacillus subtitlis), ACCC 10388 bacillus amyloliquefaciens (Bacillus amyloliquefaciens), ACCC 11080 Bacillus licheniformis (Bacillus licheniformis), the streptomyces microflavus (Streptomyces microflavus) of ACCC 41134 and ACCC 20025 pichia farinose bacterium (Pichia farinosa); Total viable count contained by every gram of this special microorganism microbial inoculum is 0.5 × 10
9-2 × 10
9individual; Cultivate respectively in respective independently culture system and obtain subtilis, bacillus amyloliquefaciens, Bacillus licheniformis, streptomyces microflavus and pichia farinose bacterium, remix obtains special microorganism microbial inoculum, wherein, be 1-3:1-3:1-3:1-3:1-3 in the weight ratio of this special microorganism microbial inoculum medium-height grass genus bacillus, bacillus amyloliquefaciens, Bacillus licheniformis, streptomyces microflavus and pichia farinose bacterium.
Wherein, the pH adjusting agent in the embodiment of the present invention is formulated by weight 0.5-1:0.5-1:0.5-1 by fused(calcium magnesium)phosphate, plant ash and diatomite.
Further, Humic acid synergistic type slow-release compound fertilizer in the embodiment of the present invention is particle, this particle comprises makes inner core particles by nitrogen raw material besides urea, phosphorus element raw material, potassium element raw material, medium trace element and biological humic by propylhomoserin granulation, this inner core particles trypsin method has slow release layer, and this slow release layer is made up (specifically being joined by sustained release dosage in the urea slurry of melting) by urine base mortar jetting method of urea and sustained release dosage.
Further, the Humic acid synergistic type slow-release compound fertilizer that the embodiment of the present invention provides also comprises anti-hard caking agent, and correspondingly, slow release layer is also coated with anti-caking layer to prevent particle from caking.
On the other hand, the embodiment of the present invention additionally provides the preparation method of aforementioned Chemical Mixed Fertilizer, and the method comprises the following steps:
(1) get nitrogen raw material (ammonium chloride, ammonium sulfate etc.) besides urea, phosphorus element raw material (monoammonium phosphate or diammonium phosphate etc.), potassium element raw material (Repone K or potassium sulfate etc.), medium trace element (being preferably inner complex) and biological humic by proportioning, mix rear feeding rotary drum granulator and carry out granulation.
(2) Urea is become melting charge oar; control-released agent is added by proportioning (0.7%-0.9% of weight of urea reaches best effect); be sprayed on the particle surface that step (1) obtains after abundant mixing and carry out granulation; preferably; rotary drum granulator is installed pulp jets device spray the urea slurry containing control-released agent; the temperature of reaction can be effectively utilized, to improve granulation outcome.
(3) finished product is obtained after particle drying step (2) obtained and screening.
Particularly, the method comprises:
(1) by proportioning, to take in ammonium chloride, ammonium sulfate, monoammonium phosphate, diammonium phosphate, Repone K or potassium sulfate several separately adds medium trace element and biological humic, send into rotary drum granulator carry out granulation after mixing through belt.
(2) will take Urea by proportioning becomes melting to urinate slurry; add the control-released agent of weight of urea 0.7%-0.9%, shower nozzle (by simply transforming on the basis of the existing rotary drum granulator) even application fully by being arranged on rotary drum granulator after mixing is surperficial at material.
(3) particle after granulation is carried out one section of drying, two-step cooling and thickness screening, pack after the particle spray coating anti-hard caking agent that after screening, granularity is qualified, after macrobead fragmentation, return granulation together with particulate.
To sum up, the beneficial effect that the technical scheme that the embodiment of the present invention provides is brought is:
1, add the humic acids through bioactivation in batching, be rich in organic matter, solvability is strong, and molecular weight I is directly absorbed by crop, and the various active material such as multiple amino acids, plant hormone that microorganism produces can promote root growth.Meanwhile, the humic acids contained has certain slow-release function, and the trace element in energy chelating soil, minimizing phosphorus fixation loss, effectively improve utilization rate of fertilizer, strengthen the resistance of crop.
2, in the urea slurry of trypsin method, add control-released agent, the hydrolysis rate of urea in soil and nitrification can be slowed down, extend nutrient-lapsed time, meet the demand of crop middle and later periods to nutrient, control early ageing.
3, friendly environment in this product application, adaptability to raw material of the present invention is strong, and formula for a product adjustment flexibly, can according to different crops preparation Special slow release fertilizer; Except containing except nitrogen, phosphorus, potassium element, also contain the necessary organic matter of plant growth and multiple Chelating state medium trace element, can be better absorbed by crops, improve output and the nutritive value of crop.
4, this product proportioning science, effectively can increase the reducing sugar in melon and fruit and Vc, improve its mouthfeel and nutritive value.
5, this product granulation adopts urine slurry sour method rotary drum prilling process; only on former rotary drum granulator, pulp jets device need be installed; without the need to increasing other device; make full use of chemical reaction between raw material to improve prilling temperature; improve material characteristic, make it to reach best granulation operating mode, material returning charge is than reducing; improve plant capacity, reduce production cost.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below the present invention is described in further detail.
Embodiment 1
Example 1 provides a kind of Humic acid synergistic type slow-release compound fertilizer, formed by following preparation of raw material: ammonium chloride (containing N25%) 360 kilograms, monoammonium phosphate is (containing N11%, P
2o
544%) 350 kilograms, Repone K is (containing K
2o60%) 220 kilograms, chelating zinc powder 8 kilograms, chelating calcium powder 5 kilograms, borax 5 kilograms, chelating manganese powder 2 kilograms, biological humic 50 kilograms, urea (containing N46%) 120 kg, control-released agent 0.9 kilogram.Its preparation process is as follows:
(1) ammonium chloride measured, monoammonium phosphate, Repone K, chelating zinc powder, chelating calcium powder, borax, chelating manganese powder, biological humic are mixed, mixture is sent into rotary drum granulator through belt.
(2) broken for urea post-heating is become urea slurry, add control-released agent and fully mix, be sprayed on material by pipeline shower nozzle.
(3) adopt one section of drying, two-step cooling and thickness screening, the particle that after screening, granularity is qualified carries out wrapping oil face powder, the finished product after packaging being.Granulation is returned with particulate after macrobead fragmentation.
Embodiment 2
Embodiment 2 provides a kind of Humic acid synergistic type slow-release compound fertilizer, is formed by following preparation of raw material: ammonium chloride (containing N25%) 310 kilograms, diammonium phosphate is (containing N15%, P
2o
547%) 394 kilograms, Repone K is (containing K
2o60%) 158 kilograms, chelating calcium powder 15 kilograms, borax 10 kilograms, chelating molybdenum powder 2 kilograms, biological humic 75 kilograms, 132 kilograms, urea (containing N46%), control-released agent 1 kilogram.
(1) ammonium chloride measured, diammonium phosphate, Repone K, chelating calcium powder, borax, chelating molybdenum powder, biological humic are mixed, mixture is sent into rotary drum granulator through belt.
(2) broken for urea post-heating is become urea slurry, add control-released agent and fully mix, be sprayed on material by pipeline shower nozzle.
(3) adopt one section of drying, two-step cooling and thickness screening, the particle that after screening, granularity is qualified carries out wrapping oil face powder, the finished product after packaging being.Granulation is returned with particulate after macrobead fragmentation.
Embodiment 3
Embodiment 3 provides a kind of Humic acid synergistic type slow-release compound fertilizer, is formed by following preparation of raw material: ammonium chloride (containing N25%) 310 kilograms, monoammonium phosphate is (containing N11%, P
2o
544%) 315 kilograms, Repone K is (containing K
2o60%) 145 kilograms, chelating zinc powder 10 kilograms, chelating calcium powder 5 kilograms, borax 5 kilograms, 10 kilograms, chelated magnesium powder, biological humic 62 kilograms, 210 kilograms, urea (containing N46%), control-released agent 1.6 kilograms.
(1) ammonium chloride measured, monoammonium phosphate, Repone K, chelating zinc powder, chelating calcium powder, borax, chelated magnesium powder, biological humic are mixed, mixture is sent into rotary drum granulator through belt.
(2) broken for urea post-heating is become urea slurry, add control-released agent and fully mix, be sprayed on material by pipeline shower nozzle.
(3) adopt one section of drying, two-step cooling and thickness screening, the particle that after screening, granularity is qualified carries out wrapping oil face powder, the finished product after packaging being.Granulation is returned with particulate after macrobead fragmentation.
By above-mentioned fertilizer, carry out corn plot experiment in 2012.6-2012.9 at Henan Xiangcheng City Experimental Base, corn variety is Zheng Dan 22.Test adopts randomized block design, plot area 30m
2, 3 process are established in test, and repeat for 4 times, test process is as follows:
The Common compound fertilizer (25-12-8) of local custom is used in process 1
The slow-release compound fertilizer not adding biological humic is used in process 2
Fertilizer of the present invention is used in process 3
In above-mentioned four process, the consumption of corresponding N, P, K basic nutrition element is identical, all uses as base manure.Through of the same race as shown in table 1 with receiving comparing result:
Table 1
| Process | Chlorophyll meter average reading (CCI) | Plant height (cm) | Bald point long (cm) | 100-grain weight (g) | Average yield per mu (kg) | Volume increase (%) |
| 1 | 39.7 | 180.8 | 1.42 | 42.1 | 631.7 | — |
| 2 | 45.6 | 182.6 | 1.22 | 43.8 | 680.2 | 7.6 |
| 3 | 57.1 | 189.7 | 0.91 | 51.2 | 705.6 | 11.7 |
Use that fertilizer of the present invention is long to the plant height of corn, bald point, 100-grain weight is all better than two control groups by above test-results is known.Test group (process 2) is control group 1 every mu of volume increase 48.5 kilograms comparatively, and stimulation ratio is 11.7%, and what namely prove sustained release dosage adds the output that effectively can provide crop.Test group (process 3) is control group 1 every mu of volume increase 73.9 kilograms comparatively, stimulation ratio is 11.7%, what namely prove biological humic adds the output that can improve crop further, and the stimulation ratio (being less than 10%) of more common humic acids (other conditions are basically identical) is large.
Embodiment 4
Embodiment 4 provides a kind of Humic acid synergistic type slow-release compound fertilizer, is formed by following preparation of raw material: 270 kilograms, ammonium sulfate (containing N21%), diammonium phosphate is (containing N15%, P
2o
547%) 215 kilograms, potassium sulfate is (containing K
2o50%) 310 kilograms, chelating calcium powder 15 kilograms, borax 10 kilograms, chelating iron powder 5 kilograms, biological humic 84 kilograms, 176 kilograms, urea (containing N46%), control-released agent 1.3 kilograms.
(1) ammonium sulfate measured, diammonium phosphate, potassium sulfate, chelating calcium powder, borax, chelating iron powder, biological humic are mixed, mixture is sent into rotary drum granulator through belt.
(2) broken for urea post-heating is become urea slurry, add control-released agent and fully mix, be sprayed on material by pipeline shower nozzle.
(3) adopt one section of drying, two-step cooling and thickness screening, the particle that after screening, granularity is qualified carries out wrapping oil face powder, the finished product after packaging being.Granulation is returned with particulate after macrobead fragmentation.
By above-mentioned fertilizer, carry out growth of watermelon test in 2011.3-2011.6 at Wuxue City agricultural industry ecological park, variety of watermelon is No. three, Zhengzhou, and test adopts randomized block design, plot area 50m
2, two process are established in test, and repeat for 4 times, test process is as follows:
The local custom composite fertilizer of process 1, base is executed;
Process 2 Chemical Mixed Fertilizers of the present invention, base is executed.
Supplement appropriate urea in the watermelon growing later stage, total consumption of corresponding N, P, K basic nutrition element of two process is identical, through of the same race as shown in table 2 with receiving comparing result:
Table 2
| Process | Per mu yield (kg) | Increase (%) | Climing length (cm) | Reducing sugar (%) | VC(mg/100g) |
| 1 | 2850.2 | — | 69.1 | 1.8 | 5.5 |
| 2 | 3225.6 | 13.2 | 83.4 | 2.3 | 7.6 |
Can find out from test-results, use common chemical fertilizer and the Humic acid synergistic slow-release compound fertilizer of equivalent weight in the experimental plot process of same area, reducing sugar and the Vc of watermelon all improve, and improve its nutritive value.Use humic acid slow release fertilizer and can increase production 13.2%, calculate by 2 yuan/kg, mu increases the output value 750 yuan.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a Humic acid synergistic type slow-release compound fertilizer, is characterized in that, the raw material comprising following parts by weight is made: nitrogen 15-45 part, phosphorus element 15-35 part, potassium element 10-25 part, medium trace element 1-10 part, biological humic 5-15 part and control-released agent; Wherein, nitrogen raw material comprises the urea accounting for gross weight 8%-25%, the addition of described control-released agent is the 0.7%-0.9% of weight of urea, described control-released agent is mixed by the weight ratio of 1:0.5-1 by urease inhibitor and nitrification inhibitor, and described biological humic is that broken bagasse and animal excrement are formed by special microorganism bacteria fermentation.
2. Humic acid synergistic type slow-release compound fertilizer according to claim 1, is characterized in that, described nitrogen raw material also comprises one or more in ammonium chloride, ammonium sulfate.
3. Humic acid synergistic type slow-release compound fertilizer according to claim 1, is characterized in that, the one in described phosphorus element phosphoric acid one ammonium or diammonium phosphate.
4. Humic acid synergistic type slow-release compound fertilizer according to claim 1, is characterized in that, described potassium element raw material comprises the one in Repone K or potassium sulfate.
5. Humic acid synergistic type slow-release compound fertilizer according to claim 1, is characterized in that, described medium trace element comprise in the complex compound of Ca, Mg, Zn, Mn, Fe, Cu, Mo and borax one or more.
6. Humic acid synergistic type slow-release compound fertilizer according to claim 1, it is characterized in that, the preparation method of described biological humic is: raw material based on the broken bagasse accounting for gross weight 60%-80%, add the chicken manure of gross weight 10%-30% or pig manure and gross weight 1%-5%pH conditioning agent, pH value and the moisture content of adjustment mixture are respectively 5.5-7.5 and 40%-50%, the inoculum size of special microorganism microbial inoculum by the 1%-10% of gross weight is evenly mixed in mixture, heat-preservation fermentation 7-10 days under 45 DEG C of-70 DEG C of conditions, described biological humic is obtained after drying and pulverizing.
7. the Humic acid synergistic type slow-release compound fertilizer according to claim 1 or 6, it is characterized in that, described special microorganism microbial inoculum comprises ACCC 11089 subtilis (Bacillus subtitlis), ACCC 10388 bacillus amyloliquefaciens (Bacillus amyloliquefaciens), ACCC 11080 Bacillus licheniformis (Bacillus licheniformis), the streptomyces microflavus (Streptomyces microflavus) of ACCC 41134 and ACCC 20025 pichia farinose bacterium (Pichia farinosa); Total viable count contained by every gram of described special microorganism microbial inoculum is 0.5 × 10
9-2 × 10
9individual, the weight ratio of described subtilis, bacillus amyloliquefaciens, Bacillus licheniformis, streptomyces microflavus and pichia farinose bacterium is 1-3:1-3:1-3:1-3:1-3.
8. Humic acid synergistic type slow-release compound fertilizer according to claim 6, is characterized in that, described pH adjusting agent is formulated by weight 0.5-1:0.5-1:0.5-1 by fused(calcium magnesium)phosphate, plant ash and diatomite.
9. Humic acid synergistic type slow-release compound fertilizer according to claim 1, it is characterized in that: described Humic acid synergistic type slow-release compound fertilizer is particle, described particle comprises makes inner core particles by nitrogen raw material besides urea, phosphorus element raw material, potassium element raw material, medium trace element and biological humic, described inner core particles trypsin method has slow release layer, and described slow release layer is made up of urea and sustained release dosage.
10. the preparation method of the Humic acid synergistic type slow-release compound fertilizer as described in claim 1-9, is characterized in that, said method comprising the steps of:
(1) get nitrogen raw material besides urea, phosphorus element raw material, potassium element raw material, medium trace element and biological humic by proportioning, mix rear feeding rotary drum granulator and carry out granulation;
(2) Urea is become melting charge oar, add control-released agent in proportion, be fully sprayed on the particle surface that step (1) obtains after mixing and carry out granulation;
(3) finished product is obtained after particle drying step (2) obtained and screening.
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| CN113372168A (en) * | 2021-07-29 | 2021-09-10 | 河南鄂中肥业有限公司 | Biological humic acid fertilizer and preparation method thereof |
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Denomination of invention: A humic acid enhanced slow-release compound fertilizer and its preparation method Effective date of registration: 20230731 Granted publication date: 20160622 Pledgee: Bank of China Limited Huanggang branch Pledgor: HUBEI XIANGYUN (Group) CHEMICAL Co.,Ltd. Registration number: Y2023420000318 |