CN105384520A - Micro-nano selenium-enriched controlled-release microbial fertilizer and preparation method thereof - Google Patents
Micro-nano selenium-enriched controlled-release microbial fertilizer and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a micro-nano selenium-enriched controlled-release microbial fertilizer and a preparation method thereof, belonging to the technical field of fertilizers. The micro-nano selenium-enriched controlled-release microbial fertilizer is prepared from the following raw materials in parts by weight: 5-15 parts of urea, 20-30 parts of ammonium sulfate, 10-20 parts of ammonium dihydrogen phosphate, 10-20 parts of potassium nitrate, 0.5-1.5 parts of sodium selenite, 15-35 parts of humic acid, 4-8 parts of nano microspheres of natural polysaccharide, 1-3 parts of a coated controlled-release agent and 0.5-1.5 parts of a microbial additive. The micro-nano selenium-enriched controlled-release microbial fertilizer is good in controlled-release property, capable of releasing nutrient elements for a long term, high in utilization ratio, and capable of reducing loss of fertilizer nutrients in soil and increasing the utilization ratio; and the fertilizer is rich in selenium, so that the content of organic selenium of plants is effectively increased, the yield of crops can be greatly increased, and the quality of the crops can be greatly improved.
Description
Technical field
The invention belongs to technical field of fertilizers, be specifically related to a kind of micro-nano rich selenium and delay controlled release microorganism fertilizer and preparation method thereof.
Background technology
Selenium is one of essential trace element of humans and animals, human or animal lacks or the selenium of excess intake, then can cause some disease, as the Keshan disease in scarce selenium area, Kaschin-Beck disease, myocardosis, the sickness rate such as cancer are very high, selenium significantly can reduce mammary cancer, skin carcinoma, colorectal carcinoma, the incidence of the multiple cancer such as liver cancer, there is special physiological function research and practices such as removing heavy metal poisoning prove, selenium element plays inherent keying action scientist discovery to HUMAN HEALTH, strengthen the exploitation of rich selenium food, there is important business & economy be worth, build up people's health especially.Tradition selenium sources mainly inorganic selenium and mineral selenium, inorganic selenium toxicity is comparatively large, relatively more serious to plant injury, and mineral selenium content is unstable, and plant absorption efficiency is not high, easily pollutes soil.Nanometer selenium is the red elemental selenium with high biological activity, and not only toxicity reduces, and active high, bioavailability is high, and easily controls selenium content in plant.
China is large agricultural country, and along with agrotechnical development, agricultural produce is more and more higher for the degree of dependence of chemical fertilizer, and the amount of application of current China chemical fertilizer occupies first place in the world, and presents the trend increased year by year.But traditional chemical faces two large problems in agriculture production use procedure: one is that fertilizer amount is large, and utilization ratio is low, and China's this season utilization rate of fertilizer nitrogenous fertilizer is 30-35%, and phosphate fertilizer utilization efficiency is 10-25%, and potash fertilizer is 35%-50%; Two is that chemical fertilizer application is unreasonable, and the chemical fertilizer application of current China is still used based on quick acting fertilizer gradation, and utilization ratio is low, and the fertilizer efficiency cycle is short, and cost is high, contaminate environment.Cause the low chief reason of utilization rate of fertilizer to be leaching loss and the volatilization of fertilizer, a large amount of leaching losses of fertilizer not only make soil fertility decline, and crop reduces, and causes a large amount of financial losses, but also can cause environmental pollution.Therefore, how to improve utilization rate of fertilizer, give full play to the effect of fertilizer to plant, China's agricultural sustainable development is of great immediate significance.Slow release fertilizer is a kind of new-type fertilizer, its nutrient releasing speed and quantity have certain controllability, Releasing nutrient can be needed according to plant growth, make it permanently effective within the whole vegetative period of farm crop, greatly can improve the utilization ratio of fertilizer, reduce consumption and application times, it is the effective way improving utilization rate of fertilizer that nutrient delays that controlled release puts.Micro-nano rich selenium slow control release biological fertilizer technology is an environmentally friendly bio-feritlizer technology, this technology can not only solve the problem such as chemical fertilizer public hazards, pesticidal contamination, soil compaction, environmental pollution in agriculture production effectively, also can improve agricultural output and quality safety, improvement soil, be development high performance and fine agriculture, produce the crucial behave of green food and Agricultural Sustainable Development.But due to the unstable of selenium element, current selenium-enriched fertilizer ubiquity delays controlled capability difference, fugitive releasing nutrients element, and nutrition leak is high, the problem that utilization rate of fertilizer is low.
Summary of the invention
The object of the present invention is to provide good, the long-acting releasing nutrients element of a kind of slow controlled capability, micro-nano rich selenium that utilization rate of fertilizer is high delays controlled release microorganism fertilizer.
The present invention also aims to provide above-mentioned micro-nano rich selenium to delay the preparation method of controlled release microorganism fertilizer.
A kind of micro-nano rich selenium delays controlled release microorganism fertilizer, is formed: Nano microsphere 4-8 part of urea 5-15 part, ammonium sulfate 20-30 part, primary ammonium phosphate 10-20 part, saltpetre 10-20 part, Sodium Selenite 0.5-1.5 part, humic acids 15-35 part, natural polysaccharide, coated slow release formulation 1-3 part, microbe additive 0.5-1.5 part by the preparation of raw material of following parts by weight.
The Nano microsphere of described natural polysaccharide is: starch or oligochitosan Nano microsphere; Described microbe additive comprises vinelandii, phosphate solubilizing bacteria, potassium solubilizing bacteria, genus bacillus, actinomyces 5406, one or more in yeast.
Above-mentioned micro-nano rich selenium delays the preparation method of controlled release microorganism fertilizer, carries out in accordance with the following steps:
1) 5-15 part urea, 20-30 part ammonium sulfate, 10-20 part primary ammonium phosphate, 10-20 part saltpetre, 0.5-1.5 part Sodium Selenite, 15-35 part humic acids, the Nano microsphere of 4-8 part natural polysaccharide, 1-3 part coated slow release formulation, 0.5-1.5 part microbe additive is got by weight;
2) 0.5-1.5 part Sodium Selenite is dissolved in 3-30 part water, adds the Nano microsphere of 1-7.5 part reductive agent and 4-8 part natural polysaccharide as template simultaneously, stir 1-5 hour at normal temperatures, then add 1-5 part treating compound, make micro-nano rich selenium and delay controlled release body;
3) nano-selenium rich is delayed controlled release body fully to mix with urea, ammonium sulfate, primary ammonium phosphate, saltpetre, humic acids, microbe additive, stir, obtain compound;
4) by compound granulation, use coated slow release formulation film, screening, cooling, oven dry, obtain micro-nano rich selenium and delay controlled release microorganism fertilizer.
Described treating compound is tween-80, tween 20, AEO-10 emulsifying agent or Triton-100.
The Nano microsphere of described natural polysaccharide is starch or oligochitosan Nano microsphere.
Described starch nano-microsphere be Zulkovsky starch pass through heating be dissolved completely in water, to be cooled to adding linking agent POCl during 30-50 DEG C
3, dispersed with stirring obtains.
Described oligochitosan Nano microsphere is be dissolved completely in the acetum of 0.5-5% by oligochitosan, drips the electronegative tripoly phosphate sodium STPP that concentration is 0.1-5%, and solution, by electrostatical binding, stirs obtained.
The preparation method of described coated slow release formulation is: by trimeric cyanamide, urea and formaldehyde carry out being mixed to get mixed polymers, add ditan-4,4 '-vulcabond again, the mixture that generation melamine urea mixes polymers and isocyanato reaction product makes coated slow release formulation.
Described reductive agent is xitix, vitamin-E, oligose beta-cyclodextrin, ethylene glycol, one or more in glucose.
Beneficial effect of the present invention: the micro-nano rich selenium slowly-releasing microorganism fertilizer that the present invention obtains, slow good, the long-acting releasing nutrients element of controlled capability, utilization rate of fertilizer are high, by micronutrient element selenium nanometer, make it that there is higher biological activity, be conducive to Crop, utilization and enrichment, the loss of fertilizer nutrient in soil can be reduced, reduce fertile industry operations number, save labour and expense, reduce the excessive pollution of using chemical fertilizer and causing, improve utilization rate of fertilizer, utilization rate of fertilizer 10-15% can be improved, improve crop yield more than 10%, and select interpolation selenium to be micronutrient element, the organic Se-rich amount of effective increase plant, can significantly improve crop yield and quality, improve crop yield, and the agricultural-food produced are in anti-cancer, anticancer, prevention and therapy cardiovascular disorder, the aspect such as Keshan disease and Kaschin-Beck disease has vital role, selenium-enriched nano slow-release fertilizer is except the various nutrients contained needed for supply crop growth, priorly can improve the surge capability of soil to undesirable substance, coordinate soil water fat gas contradiction, for crop root builds good growing environment, in order to crop robust growth, strengthen crop to sick worm, lodging, the anti-adversity abilities such as fever and chills, lay a solid foundation for realizing the nuisanceless of agricultural-food.
Embodiment
Below in conjunction with specific embodiment, the present invention will be further described.
Embodiment 1
1) take 1.5g Zulkovsky starch, heating hydrolysis is in 150mL distilled water, and hydrolyzed solution is cooled to slowly add the linking agent POCl accounting for starch quality 1% when 40 DEG C
3, 500r/min stirring reaction 30 minutes, makes natural polysaccharide Nano microsphere; By trimeric cyanamide, urea and formaldehyde carry out being mixed to get mixed polymers, then add ditan-4,4 '-vulcabond, and the mixture that generation melamine urea mixes polymers and isocyanato reaction product makes coated slow release formulation.
2) 5 parts, urea, 20 parts, ammonium sulfate, primary ammonium phosphate 20 parts, 10 parts, saltpetre, Sodium Selenite 0.5 part, humic acids 35 parts, the Nano microsphere 8 parts of natural polysaccharide, coated slow release formulation 1 part, microbe additive 0.5 part is got; Described microbe additive comprises vinelandii, phosphate solubilizing bacteria, potassium solubilizing bacteria and yeast.
3) 0.5 part of Sodium Selenite is dissolved in 5 parts of water, adds the Nano microsphere of the natural polysaccharide of 1 part of xitix and 8 parts as template simultaneously, stir 3 hours at normal temperatures, then add 3 parts of tween-80s, make micro-nano rich selenium and delay controlled release body, for subsequent use;
4) nano-selenium rich for subsequent use is delayed controlled release body fully to mix with urea, ammonium sulfate, primary ammonium phosphate, saltpetre, humic acids, microbe additive, stir, obtain compound;
5) by compound granulation, with 1 part of coated slow release formulation film, screening, cooling, oven dry, obtain micro-nano rich selenium and delay controlled release microorganism fertilizer, i.e. measurable, packaging.
The micro-nano rich selenium prepared by the present embodiment delays controlled release microorganism fertilizer and is applied to Huzhou corn field, every mu of 15kg, after results, compared with simultaneous test field (using common chemical fertilizer 15kg), corn on average increases production 10%, and in corn seed, the content of selenium is higher 1.3 times than the content of selenium in the corn seed of control experiment.
Embodiment 2
1) 1.5g oligochitosan is taken, be dissolved completely under adding agitation condition in the acetum of 150mL1%, slowly add the electronegative sodium tripolyphosphate solution (TPP) of 1% again to occurring oyster white, the amount dripping TPP is oligochitosan 1/10,500r/min stirs and forms emulsion in 30 minutes, makes natural polysaccharide Nano microsphere by electrostatical binding; By trimeric cyanamide, urea and formaldehyde carry out being mixed to get mixed polymers, then add ditan-4,4 '-vulcabond, and the mixture that generation melamine urea mixes polymers and isocyanato reaction product makes coated slow release formulation.
2) 10 parts, urea, 25 parts, ammonium sulfate, primary ammonium phosphate 15 parts, 15 parts, saltpetre, Sodium Selenite 1 part, humic acids 25 parts, the Nano microsphere 6 parts of natural polysaccharide, coated slow release formulation 2 parts, microbe additive 1 part is got; Described microbe additive comprises vinelandii, genus bacillus, actinomyces 5406 and yeast.
3) 1 part of Sodium Selenite is dissolved in 18 parts of water, adds the Nano microsphere of the natural polysaccharide of 3 parts of oligose beta-cyclodextrins and 6 parts as template simultaneously, stir 2 hours at normal temperatures, then add 4 parts of tween 20s, make micro-nano rich selenium and delay controlled release body, for subsequent use;
4) nano-selenium rich for subsequent use is delayed controlled release body fully to mix with urea, ammonium sulfate, primary ammonium phosphate, saltpetre, humic acids, microbe additive, stir, obtain compound;
5) by compound granulation, with 2 parts of coated slow release formulation films, screening, cooling, oven dry, obtain micro-nano rich selenium and delay controlled release microorganism fertilizer, i.e. measurable, packaging.
The micro-nano rich selenium prepared by the present embodiment delays controlled release microorganism fertilizer and is applied to Huzhou corn field, every mu of 15kg, after results, compared with simultaneous test field (using common chemical fertilizer 15kg), corn on average increases production 9%, and in corn seed, the content of selenium is higher 1.4 times than the content of selenium in the corn seed of control experiment.
Embodiment 3
1) 1.5g oligochitosan is taken, be dissolved completely under adding agitation condition in the acetum of 150mL1%, slowly add the electronegative sodium tripolyphosphate solution (TPP) of 1% again to occurring oyster white, the amount dripping TPP is oligochitosan 1/10,500r/min stirs and forms emulsion in 30 minutes, makes natural polysaccharide Nano microsphere by electrostatical binding; By trimeric cyanamide, urea and formaldehyde carry out being mixed to get mixed polymers, then add ditan-4,4 '-vulcabond, and the mixture that generation melamine urea mixes polymers and isocyanato reaction product makes coated slow release formulation.
2) 15 parts, urea, 30 parts, ammonium sulfate, primary ammonium phosphate 10 parts, 20 parts, saltpetre, Sodium Selenite 1.5 parts, humic acids 15 parts, the Nano microsphere 4 parts of natural polysaccharide, coated slow release formulation 3 parts, microbe additive 1.5 parts is got; Described microbe additive comprises vinelandii, phosphate solubilizing bacteria, potassium solubilizing bacteria, genus bacillus, actinomyces 5406 and yeast.
3) 1.5 parts of Sodium Selenites are dissolved in 25 parts of water, add the Nano microsphere of the natural polysaccharide of 3 parts of ethylene glycol and 4 parts as template simultaneously, stir 2 hours at normal temperatures, then add 4 parts of tween 20s, make micro-nano rich selenium and delay controlled release body, for subsequent use;
4) nano-selenium rich for subsequent use is delayed controlled release body fully to mix with urea, ammonium sulfate, primary ammonium phosphate, saltpetre, humic acids, microbe additive, stir, obtain compound;
5) by compound granulation, with 3 parts of coated slow release formulation films, screening, cooling, oven dry, obtain the rich selenium of novel micro nanometer rice and delay controlled release microorganism fertilizer, be i.e. measurable, packaging.
The micro-nano rich selenium prepared by the present embodiment delays controlled release microorganism fertilizer and is applied to Huzhou corn field, every mu of 15kg, after results, compared with simultaneous test field (using common chemical fertilizer 15kg), corn on average increases production 11%, and in corn seed, the content of selenium is higher 1.3 times than the content of selenium in the corn seed of control experiment.
Embodiment 4
1) take 1.5g Zulkovsky starch, heating hydrolysis is in 150mL distilled water, and hydrolyzed solution is cooled to slowly add the linking agent POCl accounting for starch quality 1% when 40 DEG C
3, 500r/min stirring reaction 30 minutes, makes natural polysaccharide Nano microsphere; By trimeric cyanamide, urea and formaldehyde carry out being mixed to get mixed polymers, then add ditan-4,4 '-vulcabond, and the mixture that generation melamine urea mixes polymers and isocyanato reaction product makes coated slow release formulation.
2) 5 parts, urea, 20 parts, ammonium sulfate, primary ammonium phosphate 20 parts, 10 parts, saltpetre, Sodium Selenite 0.5 part, humic acids 35 parts, 10 parts, Chinese tamarisk skin powder, the Nano microsphere 8 parts of natural polysaccharide, coated slow release formulation 1 part, microbe additive 0.5 part is got; Described microbe additive comprises vinelandii, phosphate solubilizing bacteria, potassium solubilizing bacteria and yeast.
3) 0.5 part of Sodium Selenite is dissolved in 5 parts of water, adds the Nano microsphere of the natural polysaccharide of 1 part of xitix and 8 parts as template simultaneously, stir 3 hours at normal temperatures, then add 3 parts of tween-80s, make micro-nano rich selenium and delay controlled release body, for subsequent use;
4) nano-selenium rich for subsequent use is delayed controlled release body fully to mix with urea, ammonium sulfate, primary ammonium phosphate, Chinese tamarisk skin powder, saltpetre, humic acids, microbe additive, stir, obtain compound;
5) by compound granulation, with 1 part of coated slow release formulation film, screening, cooling, oven dry, obtain micro-nano rich selenium and delay controlled release microorganism fertilizer, i.e. measurable, packaging.
The micro-nano rich selenium prepared by the present embodiment delays controlled release microorganism fertilizer and is applied to Huzhou corn field, every mu of 15kg, after results, compared with simultaneous test field (using common chemical fertilizer 15kg), corn on average increases production 15%, and in corn seed, the content of selenium is higher 2.3 times than the content of selenium in the corn seed of control experiment.
Comparative example 1
1) take 1.5g Zulkovsky starch, heating hydrolysis is in 150mL distilled water, and hydrolyzed solution is cooled to slowly add the linking agent POCl accounting for starch quality 1% when 40 DEG C
3, 500r/min stirring reaction 30 minutes, makes natural polysaccharide Nano microsphere; By trimeric cyanamide, urea and formaldehyde carry out being mixed to get mixed polymers, then add ditan-4,4 '-vulcabond, and the mixture that generation melamine urea mixes polymers and isocyanato reaction product makes coated slow release formulation.
2) 5 parts, urea, 20 parts, ammonium sulfate, primary ammonium phosphate 20 parts, 10 parts, saltpetre, Sodium Selenite 0.5 part, humic acids 35 parts, coated slow release formulation 1 part, microbe additive 0.5 part is got; Described microbe additive comprises vinelandii, phosphate solubilizing bacteria, potassium solubilizing bacteria and yeast.
3) 0.5 part of Sodium Selenite is dissolved in 5 parts of water, adds 1 part of xitix as template simultaneously, stir 3 hours at normal temperatures, then add 3 parts of tween-80s, make micro-nano rich selenium and delay controlled release body, for subsequent use;
4) nano-selenium rich for subsequent use is delayed controlled release body fully to mix with urea, ammonium sulfate, primary ammonium phosphate, saltpetre, humic acids, microbe additive, stir, obtain compound;
5) by compound granulation, with 1 part of coated slow release formulation film, screening, cooling, oven dry, obtain micro-nano rich selenium and delay controlled release microorganism fertilizer, i.e. measurable, packaging.
The micro-nano rich selenium prepared by the present embodiment delays controlled release microorganism fertilizer and is applied to Huzhou corn field, every mu of 15kg, after results, compared with simultaneous test field (using common chemical fertilizer 15kg), corn on average increases production 2%, and in corn seed, the content of selenium is higher 0.1 times than the content of selenium in the corn seed of control experiment.
Comparative example 2
1) take 1.5g Zulkovsky starch, heating hydrolysis is in 150mL distilled water, and hydrolyzed solution is cooled to slowly add the linking agent POCl accounting for starch quality 1% when 40 DEG C
3, 500r/min stirring reaction 30 minutes, makes natural polysaccharide Nano microsphere; By trimeric cyanamide, urea and formaldehyde carry out being mixed to get mixed polymers, then add ditan-4,4 '-vulcabond, and the mixture that generation melamine urea mixes polymers and isocyanato reaction product makes coated slow release formulation.
2) 5 parts, urea, 20 parts, ammonium sulfate, 10 parts, saltpetre, Sodium Selenite 0.5 part, humic acids 35 parts, the Nano microsphere 8 parts of natural polysaccharide, coated slow release formulation 1 part, microbe additive 0.5 part is got; Described microbe additive comprises vinelandii, phosphate solubilizing bacteria, potassium solubilizing bacteria and yeast.
3) 0.5 part of Sodium Selenite is dissolved in 5 parts of water, adds the Nano microsphere of the natural polysaccharide of 1 part of xitix and 8 parts as template simultaneously, stir 3 hours at normal temperatures, then add 3 parts of tween-80s, make micro-nano rich selenium and delay controlled release body, for subsequent use;
4) nano-selenium rich for subsequent use is delayed controlled release body fully to mix with urea, ammonium sulfate, saltpetre, humic acids, microbe additive, stir, obtain compound;
5) by compound granulation, with 1 part of coated slow release formulation film, screening, cooling, oven dry, obtain micro-nano rich selenium and delay controlled release microorganism fertilizer, i.e. measurable, packaging.
The micro-nano rich selenium prepared by the present embodiment delays controlled release microorganism fertilizer and is applied to Huzhou corn field, every mu of 15kg, after results, compared with simultaneous test field (using common chemical fertilizer 15kg), corn on average increases production 2%, and in corn seed, the content of selenium is higher 0.8 times than the content of selenium in the corn seed of control experiment.
Comparative example 3
1) take 1.5g Zulkovsky starch, heating hydrolysis is in 150mL distilled water, and hydrolyzed solution is cooled to slowly add the linking agent POCl accounting for starch quality 1% when 40 DEG C
3, 500r/min stirring reaction 30 minutes, makes natural polysaccharide Nano microsphere; By trimeric cyanamide, urea and formaldehyde carry out being mixed to get mixed polymers, then add ditan-4,4 '-vulcabond, and the mixture that generation melamine urea mixes polymers and isocyanato reaction product makes coated slow release formulation.
2) 5 parts, urea, 20 parts, ammonium sulfate, primary ammonium phosphate 20 parts, 10 parts, saltpetre, Sodium Selenite 0.5 part, humic acids 35 parts, the Nano microsphere 8 parts of natural polysaccharide, coated slow release formulation 1 part is got.
3) 0.5 part of Sodium Selenite is dissolved in 5 parts of water, adds the Nano microsphere of the natural polysaccharide of 1 part of xitix and 8 parts as template simultaneously, stir 3 hours at normal temperatures, then add 3 parts of tween-80s, make micro-nano rich selenium and delay controlled release body, for subsequent use;
4) nano-selenium rich for subsequent use is delayed controlled release body fully to mix with urea, ammonium sulfate, primary ammonium phosphate, saltpetre, humic acids, stir, obtain compound;
5) by compound granulation, with 1 part of coated slow release formulation film, screening, cooling, oven dry, obtain micro-nano rich selenium and delay controlled release microorganism fertilizer, i.e. measurable, packaging.
The micro-nano rich selenium prepared by the present embodiment delays controlled release microorganism fertilizer and is applied to Huzhou corn field, every mu of 15kg, after results, compared with simultaneous test field (using common chemical fertilizer 15kg), corn does not increase production, and in corn seed, the content of selenium is higher 0.1 times than the content of selenium in the corn seed of control experiment.
Micro-nano rich selenium of the present invention delays controlled release microorganism fertilizer and can be used for 9 kinds of Different Crop such as paddy rice, corn, oranges and tangerines, vegetables are tested, and test area reaches 346 mu.Test-results shows, use after micro-nano rich selenium delays controlled release microorganism fertilizer, soil with organic matter content significantly increases, and various crop yield significantly improves.As paddy rice on average increase production 9%, corn on average increases production 11%, oranges and tangerines on average increase production 14%, vegetables on average increase production 17%, other crops such as potato, melon and fruit are also on average increased production between 10-20%.
Claims (9)
1. a micro-nano rich selenium delays controlled release microorganism fertilizer, it is characterized in that, formed by the preparation of raw material of following parts by weight: Nano microsphere 4-8 part of urea 5-15 part, ammonium sulfate 20-30 part, primary ammonium phosphate 10-20 part, saltpetre 10-20 part, Sodium Selenite 0.5-1.5 part, humic acids 15-35 part, natural polysaccharide, coated slow release formulation 1-3 part, microbe additive 0.5-1.5 part.
2. a kind of micro-nano rich selenium delays controlled release microorganism fertilizer according to claim 1, it is characterized in that, the Nano microsphere of described natural polysaccharide is: starch or oligochitosan Nano microsphere; Described microbe additive comprises vinelandii, phosphate solubilizing bacteria, potassium solubilizing bacteria, genus bacillus, actinomyces 5406, one or more in yeast.
3. micro-nano rich selenium according to claim 1 delays the preparation method of controlled release microorganism fertilizer, it is characterized in that, carries out in accordance with the following steps:
1) 5-15 part urea, 20-30 part ammonium sulfate, 10-20 part primary ammonium phosphate, 10-20 part saltpetre, 0.5-1.5 part Sodium Selenite, 15-35 part humic acids, the Nano microsphere of 4-8 part natural polysaccharide, 1-3 part coated slow release formulation, 0.5-1.5 part microbe additive is got by weight;
2) 0.5-1.5 part Sodium Selenite is dissolved in 3-30 part water, adds the Nano microsphere of 1-7.5 part reductive agent and 4-8 part natural polysaccharide as template simultaneously, stir 1-5 hour at normal temperatures, then add 1-5 part treating compound, make micro-nano rich selenium and delay controlled release body;
3) nano-selenium rich is delayed controlled release body fully to mix with urea, ammonium sulfate, primary ammonium phosphate, saltpetre, humic acids, microbe additive, stir, obtain compound;
4) by compound granulation, use coated slow release formulation film, screening, cooling, oven dry, obtain micro-nano rich selenium and delay controlled release microorganism fertilizer.
4. micro-nano rich selenium according to claim 3 delays the preparation method of controlled release microorganism fertilizer, it is characterized in that, described treating compound is tween-80, tween 20, AEO-10 emulsifying agent or Triton-100.
5. micro-nano rich selenium according to claim 3 delays the preparation method of controlled release microorganism fertilizer, it is characterized in that, the Nano microsphere of described natural polysaccharide is starch or oligochitosan Nano microsphere.
6. micro-nano rich selenium according to claim 5 delays the preparation method of controlled release microorganism fertilizer, it is characterized in that, described starch nano-microsphere be Zulkovsky starch pass through heating be dissolved completely in water, to be cooled to adding linking agent POCl during 30-50 DEG C
3, dispersed with stirring obtains.
7. micro-nano rich selenium according to claim 5 delays the preparation method of controlled release microorganism fertilizer, it is characterized in that, described oligochitosan Nano microsphere is be dissolved completely in the acetum of 0.5-5% by oligochitosan, drip the electronegative tripoly phosphate sodium STPP that concentration is 0.1-5%, solution, by electrostatical binding, stirs obtained.
8. micro-nano rich selenium according to claim 3 delays the preparation method of controlled release microorganism fertilizer, it is characterized in that, the preparation method of described coated slow release formulation is: by trimeric cyanamide, urea and formaldehyde carry out being mixed to get mixed polymers, add ditan-4 again, 4 '-vulcabond, the mixture that generation melamine urea mixes polymers and isocyanato reaction product makes coated slow release formulation.
9. micro-nano rich selenium according to claim 3 delays the preparation method of controlled release microorganism fertilizer, it is characterized in that, described reductive agent is xitix, vitamin-E, oligose beta-cyclodextrin, ethylene glycol, one or more in glucose.
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| CN106278558A (en) * | 2016-07-28 | 2017-01-04 | 成都正光投资集团有限公司 | A kind of selenium-rich slow release resistance cadmium agent and preparation method thereof |
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| CN107324924A (en) * | 2017-08-25 | 2017-11-07 | 云南核度生物产业发展有限公司 | A kind of nanometer selenium fertilizer with slow-release function and preparation method thereof |
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| CN108852897A (en) * | 2018-07-12 | 2018-11-23 | 江西中科硒谷功能农业发展有限公司 | A kind of preparation method of being Selenium in Plants nourishing skin liquid |
| CN111244483A (en) * | 2020-01-15 | 2020-06-05 | 朱旭烈 | N-P co-doped porous carbon-coated NiCo2O4Oxygen reduction catalyst and process for producing the same |
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| WO2022036522A1 (en) * | 2020-08-17 | 2022-02-24 | 南京溧水高新创业投资管理有限公司 | Composition for increasing yield of crops and preparation method therefor |
| CN112142513A (en) * | 2020-09-27 | 2020-12-29 | 陕西科技大学 | Chelated foliar fertilizer for vegetables and preparation method and application thereof |
| CN112142513B (en) * | 2020-09-27 | 2022-04-22 | 陕西科技大学 | Chelated foliar fertilizer for vegetables and preparation method and application thereof |
| CN113636890A (en) * | 2021-09-18 | 2021-11-12 | 成都正光投资集团有限公司 | Selenium-rich slow-release cadmium inhibitor and preparation method thereof |
| CN113636890B (en) * | 2021-09-18 | 2022-04-15 | 成都正光投资集团有限公司 | Selenium-rich slow-release cadmium inhibitor and preparation method thereof |
| CN114208614A (en) * | 2021-12-16 | 2022-03-22 | 苏州新高塬生物科技有限公司 | Method for improving nitrogen utilization effectiveness of rice soil |
| CN114208614B (en) * | 2021-12-16 | 2023-08-04 | 苏州新高塬生物科技有限公司 | Method for improving nitrogen utilization effectiveness of rice soil |
| CN114956905A (en) * | 2022-06-20 | 2022-08-30 | 安徽省膳硒食品有限公司 | Bioactive nano elemental selenium fertilizer and preparation method and preparation device thereof |
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