CN105367304A - Method for preparing long-acting slow-release nitrogenous fertilizer through ureaformaldehyde composite glycolic acid - Google Patents
Method for preparing long-acting slow-release nitrogenous fertilizer through ureaformaldehyde composite glycolic acid Download PDFInfo
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- CN105367304A CN105367304A CN201510987960.6A CN201510987960A CN105367304A CN 105367304 A CN105367304 A CN 105367304A CN 201510987960 A CN201510987960 A CN 201510987960A CN 105367304 A CN105367304 A CN 105367304A
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- 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
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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
- 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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- Life Sciences & Earth Sciences (AREA)
- Pest Control & Pesticides (AREA)
- Fertilizers (AREA)
Abstract
The invention relates to the technical field of long-acting nitrogenous fertilizers, particularly to a method for preparing a long-acting slow-release nitrogenous fertilizer through ureaformaldehyde composite glycolic acid. The method comprises the following steps: after research on a mechanism of the interaction between ureaformaldehyde and glycolic acid, mixing ureaformaldehyde with glycolic acid; after mixing under the conditions of a certain temperature and molar ratio, adding monopotassium phosphate, ammonium nitrate, calcium carbonate powder and zinc sulfate into the mixture, and carrying out mixing granulation, so as to effectively carrying out bonding and mixing on the nutrients in the fertilizer; after granulation, reacting with phosphorus gypsum slurry to form a layer of water-containing phosphorus gypsum slurry on the surfaces of the particles; after adjusting the granularity, carrying out alternate guniting wrapping through adopting composite slurry and compound fertilizer slurry, so as to form a multi-layered structure on the surfaces of the particles during the treatment process; and drying at relatively high temperature after guniting, so as to enable the water molecules in the inner ardealite to emit from inside to outside, form irregular pores in the particles, increase the nutrient releasing rate of the fertilizer, and prolong the slow release period of the fertilizer.
Description
Technical field
The present invention relates to long-acting nitrogen fertilizer technical field, especially a kind of urea formaldehyde compound oxyacetic acid prepares long-acting slowly released nitrogen fertilizer method.
Background technology
Along with the fast development of agricultural, the correlative technology fields such as agricultural fertilizer are obtained and develops fast, make agriculture field pass through to have adopted chemical fertilizer by the output increased of agricultural-food, make the profit increasing agricultural-food to a certain extent; Along with the feature that life-time service and the chemical fertilizer itself of chemical fertilizer have, make when adopting chemical fertilizer to carry out fertilizer treatment, it can not meet corps nutrient demand for a long time and provide safeguard, make in agricultural cultivation process, spraying fertilizer is needed to meet the demands, not so, it also can cause the output of agricultural-food lower, reduces the profit of agricultural planting.But if constantly apply fertilizer in soil in soil, it not only can cause environmental pollution, but also proportion of crop planting cost can be caused higher, and profit is lower; But also labour intensity can be caused larger.
Based on this, investigator is had to take to research in sustained slow-release fertilizer in prior art, its objective is and make single fertilization can meet nutritional needs in crop growth periodic process, and make the fertilizer applied effectively can activate the N P and K factor in soil, make the n p k nutrition element hardened in soil can be carried out activation treatment by the fertilizer applied, it is made to improve the structure of soil, improve the environment of crop growth, reduce usage quantity and the fertilizer application frequency of fertilizer, reduce labour intensity and planting cost.
The technique means of current employing is mainly reflected in: adopt the material with chelating function, as EDTA joins the composite fertilizer that fertiliser mixtures kind is mixed with into mixed state; Adopt soil improvement agent, apply fertilizer in soil as soil improvement agent is mixed with fertilizer, reach and improve Soil structure, improve fertilizer efficiency; Adopt urea formaldehyde as slowly-releasing raw material, if the patent No. is 201010268404.0, " preparation method of nitre state urea-formaldehyde fertilizer " discloses a kind of granular fertilizer of slow-release nitrogen element, make the nitrogen content in the fertilizer obtained higher, nitrogen supply has quick-acting and effect that is slow.
Although also exist a large amount of about slow-release fertilizer in prior art, soil improvement agent, the research in Hefei difficult to understand etc., it is still difficult to the demand of the fast development meeting modern agriculture.
Summary of the invention
In order to solve the above-mentioned technical problem existed in prior art, the invention provides a kind of urea formaldehyde compound oxyacetic acid and preparing long-acting slowly released nitrogen fertilizer method.
Specifically be achieved according to following technical scheme:
A kind of urea formaldehyde compound oxyacetic acid prepares long-acting slowly released nitrogen fertilizer method, comprises the following steps:
(1) by urea formaldehyde and oxyacetic acid according to mol ratio be 1: 0.5 ~ 1.1 mix after, temperature is adopted to be 70-90 DEG C of isothermal holding 10-20min, after adding potassium primary phosphate, ammonium nitrate, calcium carbonate powders, zinc sulfate mixing more wherein, being placed on temperature is 100-130 DEG C, stirring velocity is 300-500r/min stir process 20-50min, be placed on granulation in tablets press again, adopt temperature to be 40-60 DEG C of baking processing 10-20min, stand-by;
(2) by urea formaldehyde and oxyacetic acid according to mol ratio be 1: 0.1 ~ 0.3 mix after, be processed into molten state, composite pulp; Get nitrogen-phosphorus-potassium compound fertilizer simultaneously, after being processed into molten state, obtain composite fertilizer's slurry;
(3) fresh phosphogypsum is got, after phosphogypsum is modulated pulping, particle prepared by step (1) and phosphogypsum according to mass ratio be 1: 0.7 ~ 0.9 mix after, be after 5000-9000r/min stir process 10-20s by its employing stirring speed, be adjusted to 30-50 object particle, again this particle is placed in whitewashing packing machine, the composite pulp prepare step (2) and composite fertilizer starch and are alternately sprayed at particle surface, and first spray composite pulp, spray composite fertilizer's slurry subsequently, after composite fertilizer's slurry has sprayed, being placed in temperature is after 45 ~ 55 DEG C of process 20-30s, repeat above-mentioned alternately sprinkling process again, until when forming 3-5 layer composite pulp integument, stop whitewashing parcel, being placed on temperature is again 70-80 DEG C of process 1-3min, packaging, .
Described step (1), the add-on of described potassium primary phosphate is 0.3 ~ 0.6 times of urea formaldehyde consumption; The add-on of described ammonium nitrate is 0.05 ~ 0.3 times of urea formaldehyde consumption; The add-on of described calcium carbonate powders is 0.5 ~ 0.7 times of urea formaldehyde consumption; The add-on of described zinc sulfate is 0.4 ~ 0.8 times of urea formaldehyde consumption.
In described step (2), nitrogen-phosphorus-potassium compound fertilizer consumption is 0.5 ~ 0.9 times of urea formaldehyde.
In described step (3), 1kg particle adopts 0.3 ~ 0.5kg composite pulp and 0.07 ~ 0.15 composite fertilizer slurry parcel.
Described nitrogen-phosphorus-potassium compound fertilizer be the fertile and/or ammonium sulfate of ammonium-potassium phosphate sosoloid with potassium phosphate salt arbitrarily than mixture.
Described potassium phosphate salt is a kind of in potassium primary phosphate, potassium hydrogen phosphate or both any mixing.
Compared with prior art, technique effect of the present invention is embodied in:
After mechanism interactional between urea formaldehyde and oxyacetic acid is studied, urea formaldehyde is mixed with oxyacetic acid, and at certain temperature and molar ratio after mixing, add potassium primary phosphate wherein again, ammonium nitrate, calcium carbonate powders, zinc sulfate mixing granulation, make it effectively the nutrient in fertilizer can be carried out bonding and mixing, and by after its granulation with the effect of phosphogypsum slurry after, the moisture phosphogypsum slurries of one deck are formed at particle surface, after again its granularity being adjusted, employing composite pulp and composite fertilizer starch alternately to whitewash and wrap up, make in treating processes, multi-level structure is formed on granular fertilizer surface, combine the comparatively high temps drying and processing after having whitewashed again, water molecules in inner phosphogypsum is distributed from the inside to the outside, make to form irregular hole in its particle, improve the nutrient release rate of fertilizer, simultaneously in conjunction with urea formaldehyde with after oxyacetic acid combination treatment with the mixing of fertilizer, make it have the slow release effect of longer cycle, extend the slowly-releasing cycle to nitrogen element.
The present invention is by the restriction to temperature condition, granulated fertilizer surface is made to form harder structure, the mixed fertilizer with certain moisture content is formed in granular fertilizer inside, and in conjunction with the mixing effect of urea formaldehyde and oxyacetic acid, it is made to form certain skeleton structure by granular fertilizer surface to granular fertilizer inside, and be the compound slurry of urea formaldehyde and oxyacetic acid in conjunction with outermost layer, the material parcel making it effectively inside can be contained moisture and absorption, and after applying fertilizer in soil, it effectively can discharge other nutrients fast, simultaneously while other nutrients progressively meet crop growth demand, the structure formed after its urea formaldehyde and oxyacetic acid effect constantly occurs to decompose liberating nitrogen element, also activation treatment is carried out to the phosphorus potassium element in soil simultaneously, extend fertilizer efficiency, reduce the fertilizer application amount in agricultural planting process, reduce cost.
In addition, after urea formaldehyde and oxyacetic acid and fresh phosphogypsum also carry out mixing and add by this investigator, make the pH obtaining fertilizer lower, make it effectively can alleviate the generation in saltings, improve the structure of soil, ensure that the quality of crop growth environment.
Preparation technology's flow process of the present invention is simple, and parameter is easy to control, and the long-acting slowly released nitrogen fertilizer of acquisition can meet the nitrogenous fertilizer demand in process of crop growth, and can play the phosphorus potassium element in activating soil to a certain extent, improves the fertilizer efficiency of soil; Maize planting process in soil is entered by this nitrogenous fertilizer being carried out bulk application, and according to after every mu of fertilising 55kg, observe the situation in corn growth periodic process, wherein corn can keep green to deep green for a long time, especially between corn heading stage to 20 days after having eared, the blade of its milpa is in deep green, and finds no the phenomenon of a large amount of maize leaf jaundice, and it effectively can improve the slowly-releasing cycle of nitrogenous fertilizer as seen; In addition, this investigator is also to the observation of Maize at Seedling Stage, its growing state is also tending towards normal growth, there is not yellow leaf phenomenon, visible, in this slow-release nitrogen fertilizer, it can effectively provide available nitrogen and slow-release nitrogen, the whole cycle for plant growth provides the demand of nitrogenous fertilizer, improves the slow release effect of nitrogenous fertilizer.
Embodiment
Below in conjunction with concrete embodiment, further restriction is done to technical scheme of the present invention, but claimed scope is not only confined to done description.
Embodiment 1
A kind of urea formaldehyde compound oxyacetic acid prepares long-acting slowly released nitrogen fertilizer method, comprises the following steps:
(1) by urea formaldehyde and oxyacetic acid according to mol ratio be 1: 0.5 mix after, temperature is adopted to be 70 DEG C of isothermal holding 10min, after adding potassium primary phosphate, ammonium nitrate, calcium carbonate powders, zinc sulfate mixing more wherein, being placed on temperature is 100 DEG C, stirring velocity is 300r/min stir process 20min, be placed on granulation in tablets press again, adopt temperature to be 40 DEG C of baking processing 10min, stand-by;
(2) by urea formaldehyde and oxyacetic acid according to mol ratio be 1: 0.1 mix after, be processed into molten state, composite pulp; Get nitrogen-phosphorus-potassium compound fertilizer simultaneously, after being processed into molten state, obtain composite fertilizer's slurry;
(3) fresh phosphogypsum is got, after phosphogypsum is modulated pulping, particle prepared by step (1) and phosphogypsum according to mass ratio be 1: 0.7 mix after, be after 5000r/min stir process 10s by its employing stirring speed, be adjusted to 30 object particles, again this particle is placed in whitewashing packing machine, the composite pulp prepare step (2) and composite fertilizer starch and are alternately sprayed at particle surface, and first spray composite pulp, spray composite fertilizer's slurry subsequently, after composite fertilizer's slurry has sprayed, being placed in temperature is after 45 DEG C of process 20s, repeat above-mentioned alternately sprinkling process again, until when forming 3 layers of composite pulp integument, stop whitewashing parcel, being placed on temperature is again 70 DEG C of process 1min, packaging, .
Described step (1), the add-on of described potassium primary phosphate is 0.3 times of urea formaldehyde consumption; The add-on of described ammonium nitrate is 0.05 times of urea formaldehyde consumption; The add-on of described calcium carbonate powders is 0.5 times of urea formaldehyde consumption; The add-on of described zinc sulfate is 0.4 times of urea formaldehyde consumption.
In described step (2), nitrogen-phosphorus-potassium compound fertilizer consumption is 0.5 times of urea formaldehyde.
In described step (3), 1kg particle adopts 0.3kg composite pulp and 0.07 composite fertilizer slurry parcel.Described nitrogen-phosphorus-potassium compound fertilizer is that ammonium-potassium phosphate sosoloid is fertile.
Embodiment 2
A kind of urea formaldehyde compound oxyacetic acid prepares long-acting slowly released nitrogen fertilizer method, comprises the following steps:
(1) by urea formaldehyde and oxyacetic acid according to mol ratio be 1: 1.1 mix after, temperature is adopted to be 90 DEG C of isothermal holding 20min, after adding potassium primary phosphate, ammonium nitrate, calcium carbonate powders, zinc sulfate mixing more wherein, being placed on temperature is 130 DEG C, stirring velocity is 500r/min stir process 50min, be placed on granulation in tablets press again, adopt temperature to be 60 DEG C of baking processing 20min, stand-by;
(2) by urea formaldehyde and oxyacetic acid according to mol ratio be 1: 0.3 mix after, be processed into molten state, composite pulp; Get nitrogen-phosphorus-potassium compound fertilizer simultaneously, after being processed into molten state, obtain composite fertilizer's slurry;
(3) fresh phosphogypsum is got, after phosphogypsum is modulated pulping, particle prepared by step (1) and phosphogypsum according to mass ratio be 1: 0.9 mix after, be after 9000r/min stir process 20s by its employing stirring speed, be adjusted to 50 object particles, again this particle is placed in whitewashing packing machine, the composite pulp prepare step (2) and composite fertilizer starch and are alternately sprayed at particle surface, and first spray composite pulp, spray composite fertilizer's slurry subsequently, after composite fertilizer's slurry has sprayed, being placed in temperature is after 55 DEG C of process 30s, repeat above-mentioned alternately sprinkling process again, until when forming 5 layers of composite pulp integument, stop whitewashing parcel, being placed on temperature is again 80 DEG C of process 3min, packaging, .
Described step (1), the add-on of described potassium primary phosphate is 0.6 times of urea formaldehyde consumption; The add-on of described ammonium nitrate is 0.3 times of urea formaldehyde consumption; The add-on of described calcium carbonate powders is 0.7 times of urea formaldehyde consumption; The add-on of described zinc sulfate is 0.8 times of urea formaldehyde consumption.
In described step (2), nitrogen-phosphorus-potassium compound fertilizer consumption is 0.9 times of urea formaldehyde.
In described step (3), 1kg particle adopts 0.5kg composite pulp and 0.15 composite fertilizer slurry parcel.Described nitrogen-phosphorus-potassium compound fertilizer be ammonium sulfate with potassium phosphate salt arbitrarily than mixture.Described potassium phosphate salt is potassium primary phosphate.
Embodiment 3
A kind of urea formaldehyde compound oxyacetic acid prepares long-acting slowly released nitrogen fertilizer method, comprises the following steps:
(1) by urea formaldehyde and oxyacetic acid according to mol ratio be 1: 0.8 mix after, temperature is adopted to be 80 DEG C of isothermal holding 15min, after adding potassium primary phosphate, ammonium nitrate, calcium carbonate powders, zinc sulfate mixing more wherein, being placed on temperature is 120 DEG C, stirring velocity is 400r/min stir process 40min, be placed on granulation in tablets press again, adopt temperature to be 50 DEG C of baking processing 15min, stand-by;
(2) by urea formaldehyde and oxyacetic acid according to mol ratio be 1: 0.2 mix after, be processed into molten state, composite pulp; Get nitrogen-phosphorus-potassium compound fertilizer simultaneously, after being processed into molten state, obtain composite fertilizer's slurry;
(3) fresh phosphogypsum is got, after phosphogypsum is modulated pulping, particle prepared by step (1) and phosphogypsum according to mass ratio be 1: 0.8 mix after, be after 7000r/min stir process 15s by its employing stirring speed, be adjusted to 40 object particles, again this particle is placed in whitewashing packing machine, the composite pulp prepare step (2) and composite fertilizer starch and are alternately sprayed at particle surface, and first spray composite pulp, spray composite fertilizer's slurry subsequently, after composite fertilizer's slurry has sprayed, being placed in temperature is after 50 DEG C of process 25s, repeat above-mentioned alternately sprinkling process again, until when forming 4 layers of composite pulp integument, stop whitewashing parcel, being placed on temperature is again 75 DEG C of process 2min, packaging, .
Described step (1), the add-on of described potassium primary phosphate is 0.5 times of urea formaldehyde consumption; The add-on of described ammonium nitrate is 0.2 times of urea formaldehyde consumption; The add-on of described calcium carbonate powders is 0.6 times of urea formaldehyde consumption; The add-on of described zinc sulfate is 0.7 times of urea formaldehyde consumption.
In described step (2), nitrogen-phosphorus-potassium compound fertilizer consumption is 0.7 times of urea formaldehyde.
In described step (3), 1kg particle adopts 0.4kg composite pulp and 0.11 composite fertilizer slurry parcel.Described nitrogen-phosphorus-potassium compound fertilizer be the fertile and ammonium sulfate of ammonium-potassium phosphate sosoloid with potassium phosphate salt arbitrarily than mixture.Described potassium phosphate salt is potassium hydrogen phosphate.
Embodiment 4
A kind of urea formaldehyde compound oxyacetic acid prepares long-acting slowly released nitrogen fertilizer method, comprises the following steps:
(1) by urea formaldehyde and oxyacetic acid according to mol ratio be 1: 0.5 mix after, temperature is adopted to be 90 DEG C of isothermal holding 10min, after adding potassium primary phosphate, ammonium nitrate, calcium carbonate powders, zinc sulfate mixing more wherein, being placed on temperature is 110 DEG C, stirring velocity is 350r/min stir process 40min, be placed on granulation in tablets press again, adopt temperature to be 45 DEG C of baking processing 17min, stand-by;
(2) by urea formaldehyde and oxyacetic acid according to mol ratio be 1: 0.2 mix after, be processed into molten state, composite pulp; Get nitrogen-phosphorus-potassium compound fertilizer simultaneously, after being processed into molten state, obtain composite fertilizer's slurry;
(3) fresh phosphogypsum is got, after phosphogypsum is modulated pulping, particle prepared by step (1) and phosphogypsum according to mass ratio be 1: 0.7 mix after, be after 9000r/min stir process 10s by its employing stirring speed, be adjusted to 50 object particles, again this particle is placed in whitewashing packing machine, the composite pulp prepare step (2) and composite fertilizer starch and are alternately sprayed at particle surface, and first spray composite pulp, spray composite fertilizer's slurry subsequently, after composite fertilizer's slurry has sprayed, being placed in temperature is after 45 DEG C of process 20s, repeat above-mentioned alternately sprinkling process again, until when forming 3 layers of composite pulp integument, stop whitewashing parcel, being placed on temperature is again 80 DEG C of process 1min, packaging, .
Described step (1), the add-on of described potassium primary phosphate is 0.3 times of urea formaldehyde consumption; The add-on of described ammonium nitrate is 0.3 times of urea formaldehyde consumption; The add-on of described calcium carbonate powders is 0.5 times of urea formaldehyde consumption; The add-on of described zinc sulfate is 0.4 times of urea formaldehyde consumption.
In described step (2), nitrogen-phosphorus-potassium compound fertilizer consumption is 0.9 times of urea formaldehyde.
In described step (3), 1kg particle adopts 0.5kg composite pulp and 0.07 composite fertilizer slurry parcel.
Described nitrogen-phosphorus-potassium compound fertilizer be the fertile and ammonium sulfate of ammonium-potassium phosphate sosoloid with potassium phosphate salt arbitrarily than mixture.Described potassium phosphate salt is both any mixing in potassium primary phosphate, potassium hydrogen phosphate.
Claims (6)
1. urea formaldehyde compound oxyacetic acid prepares a long-acting slowly released nitrogen fertilizer method, it is characterized in that, comprises the following steps:
(1) by urea formaldehyde and oxyacetic acid according to mol ratio be 1: 0.5 ~ 1.1 mix after, temperature is adopted to be 70-90 DEG C of isothermal holding 10-20min, after adding potassium primary phosphate, ammonium nitrate, calcium carbonate powders, zinc sulfate mixing more wherein, being placed on temperature is 100-130 DEG C, stirring velocity is 300-500r/min stir process 20-50min, be placed on granulation in tablets press again, adopt temperature to be 40-60 DEG C of baking processing 10-20min, stand-by;
(2) by urea formaldehyde and oxyacetic acid according to mol ratio be 1: 0.1 ~ 0.3 mix after, be processed into molten state, composite pulp; Get nitrogen-phosphorus-potassium compound fertilizer simultaneously, after being processed into molten state, obtain composite fertilizer's slurry;
(3) fresh phosphogypsum is got, after phosphogypsum is modulated pulping, particle prepared by step (1) and phosphogypsum according to mass ratio be 1: 0.7 ~ 0.9 mix after, be after 5000-9000r/min stir process 10-20s by its employing stirring speed, be adjusted to 30-50 object particle, again this particle is placed in whitewashing packing machine, the composite pulp prepare step (2) and composite fertilizer starch and are alternately sprayed at particle surface, and first spray composite pulp, spray composite fertilizer's slurry subsequently, after composite fertilizer's slurry has sprayed, being placed in temperature is after 45 ~ 55 DEG C of process 20-30s, repeat above-mentioned alternately sprinkling process again, until when forming 3-5 layer composite pulp integument, stop whitewashing parcel, being placed on temperature is again 70-80 DEG C of process 1-3min, packaging, .
2. urea formaldehyde compound oxyacetic acid as claimed in claim 1 prepares long-acting slowly released nitrogen fertilizer method, and it is characterized in that, described step (1), the add-on of described potassium primary phosphate is 0.3 ~ 0.6 times of urea formaldehyde consumption; The add-on of described ammonium nitrate is 0.05 ~ 0.3 times of urea formaldehyde consumption; The add-on of described calcium carbonate powders is 0.5 ~ 0.7 times of urea formaldehyde consumption; The add-on of described zinc sulfate is 0.4 ~ 0.8 times of urea formaldehyde consumption.
3. urea formaldehyde compound oxyacetic acid as claimed in claim 1 prepares long-acting slowly released nitrogen fertilizer method, and it is characterized in that, in described step (2), nitrogen-phosphorus-potassium compound fertilizer consumption is 0.5 ~ 0.9 times of urea formaldehyde.
4. urea formaldehyde compound oxyacetic acid as claimed in claim 1 prepares long-acting slowly released nitrogen fertilizer method, it is characterized in that, in described step (3), 1kg particle adopts 0.3 ~ 0.5kg composite pulp and 0.07 ~ 0.15 composite fertilizer slurry parcel.
5. urea formaldehyde compound oxyacetic acid as claimed in claim 1 prepares long-acting slowly released nitrogen fertilizer method, it is characterized in that, described nitrogen-phosphorus-potassium compound fertilizer be the fertile and/or ammonium sulfate of ammonium-potassium phosphate sosoloid with potassium phosphate salt arbitrarily than mixture.
6. urea formaldehyde compound oxyacetic acid as claimed in claim 5 prepares long-acting slowly released nitrogen fertilizer method, it is characterized in that, described potassium phosphate salt is a kind of in potassium primary phosphate, potassium hydrogen phosphate or both any mixing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510987960.6A CN105367304A (en) | 2015-12-24 | 2015-12-24 | Method for preparing long-acting slow-release nitrogenous fertilizer through ureaformaldehyde composite glycolic acid |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07206564A (en) * | 1994-01-11 | 1995-08-08 | Chisso Corp | Agrochemical-coated granular fertilizer and its production |
| CN1198427A (en) * | 1997-05-01 | 1998-11-11 | 吕庆淮 | Nitrogenous phosphate potash long-effect compound fertilizer and productive method thereof |
| CN1948234A (en) * | 2006-01-09 | 2007-04-18 | 安徽省宁国司尔特化肥有限公司 | High nitrogen sulfur base nitrogen phosphorus potassium slow release composite fertilizer and its production method |
| CN101182265A (en) * | 2007-12-05 | 2008-05-21 | 天津市中天化肥有限公司 | Method for producing three-layer coated soybean fertilizer |
| CN101434495A (en) * | 2007-11-13 | 2009-05-20 | 任兆磊 | Phosphogypsum sustained-controlled compound fertilizer |
| CN103524200A (en) * | 2013-08-27 | 2014-01-22 | 黄继军 | Fertilizer with controllable slow release function in full growth period as well as preparation method thereof |
-
2015
- 2015-12-24 CN CN201510987960.6A patent/CN105367304A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07206564A (en) * | 1994-01-11 | 1995-08-08 | Chisso Corp | Agrochemical-coated granular fertilizer and its production |
| CN1198427A (en) * | 1997-05-01 | 1998-11-11 | 吕庆淮 | Nitrogenous phosphate potash long-effect compound fertilizer and productive method thereof |
| CN1948234A (en) * | 2006-01-09 | 2007-04-18 | 安徽省宁国司尔特化肥有限公司 | High nitrogen sulfur base nitrogen phosphorus potassium slow release composite fertilizer and its production method |
| CN101434495A (en) * | 2007-11-13 | 2009-05-20 | 任兆磊 | Phosphogypsum sustained-controlled compound fertilizer |
| CN101182265A (en) * | 2007-12-05 | 2008-05-21 | 天津市中天化肥有限公司 | Method for producing three-layer coated soybean fertilizer |
| CN103524200A (en) * | 2013-08-27 | 2014-01-22 | 黄继军 | Fertilizer with controllable slow release function in full growth period as well as preparation method thereof |
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Application publication date: 20160302 |