CN101486619B - Process for preparing seaweed urea - Google Patents
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- CN101486619B CN101486619B CN2009100147170A CN200910014717A CN101486619B CN 101486619 B CN101486619 B CN 101486619B CN 2009100147170 A CN2009100147170 A CN 2009100147170A CN 200910014717 A CN200910014717 A CN 200910014717A CN 101486619 B CN101486619 B CN 101486619B
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- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 68
- 239000004202 carbamide Substances 0.000 title claims abstract description 68
- 241001474374 Blennius Species 0.000 title claims abstract description 63
- 238000004519 manufacturing process Methods 0.000 title description 7
- 238000000034 method Methods 0.000 claims abstract description 12
- 239000007787 solid Substances 0.000 claims abstract description 5
- 238000002360 preparation method Methods 0.000 claims description 21
- 239000012141 concentrate Substances 0.000 claims description 14
- 238000005469 granulation Methods 0.000 claims description 12
- 230000003179 granulation Effects 0.000 claims description 12
- 239000000126 substance Substances 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 10
- 239000003513 alkali Substances 0.000 claims description 8
- 238000010792 warming Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims description 6
- 239000011630 iodine Substances 0.000 claims description 6
- 229910052740 iodine Inorganic materials 0.000 claims description 6
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical group [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 5
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 5
- 239000011575 calcium Substances 0.000 claims description 5
- 229910052791 calcium Inorganic materials 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 239000011777 magnesium Substances 0.000 claims description 5
- 229910052749 magnesium Inorganic materials 0.000 claims description 5
- 235000017550 sodium carbonate Nutrition 0.000 claims description 5
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 5
- 239000011573 trace mineral Substances 0.000 claims description 5
- 235000013619 trace mineral Nutrition 0.000 claims description 5
- 239000011701 zinc Substances 0.000 claims description 5
- 229910052725 zinc Inorganic materials 0.000 claims description 5
- 241000512259 Ascophyllum nodosum Species 0.000 claims description 4
- 241000196252 Ulva Species 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 4
- 235000015320 potassium carbonate Nutrition 0.000 claims description 4
- 239000000047 product Substances 0.000 claims description 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 3
- 239000005864 Sulphur Substances 0.000 claims description 3
- 229910052796 boron Inorganic materials 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims description 3
- 239000000706 filtrate Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims description 3
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000011733 molybdenum Substances 0.000 claims description 3
- 229910052750 molybdenum Inorganic materials 0.000 claims description 3
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 3
- 229920001542 oligosaccharide Polymers 0.000 claims description 3
- 150000002482 oligosaccharides Chemical class 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 239000005648 plant growth regulator Substances 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 abstract description 4
- 239000002689 soil Substances 0.000 abstract description 4
- 230000004720 fertilization Effects 0.000 abstract description 2
- 238000000354 decomposition reaction Methods 0.000 abstract 1
- 230000006866 deterioration Effects 0.000 abstract 1
- 230000000452 restraining effect Effects 0.000 abstract 1
- 239000003337 fertilizer Substances 0.000 description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 150000004676 glycans Chemical class 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229920001282 polysaccharide Polymers 0.000 description 3
- 239000005017 polysaccharide Substances 0.000 description 3
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- 241000195474 Sargassum Species 0.000 description 2
- 150000001413 amino acids Chemical class 0.000 description 2
- 230000004071 biological effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000003630 growth substance Substances 0.000 description 2
- 239000005556 hormone Substances 0.000 description 2
- 229940088597 hormone Drugs 0.000 description 2
- 239000002366 mineral element Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000000618 nitrogen fertilizer Substances 0.000 description 2
- 239000003375 plant hormone Substances 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 102000004169 proteins and genes Human genes 0.000 description 2
- 108090000623 proteins and genes Proteins 0.000 description 2
- 235000021122 unsaturated fatty acids Nutrition 0.000 description 2
- 150000004670 unsaturated fatty acids Chemical class 0.000 description 2
- 239000011782 vitamin Substances 0.000 description 2
- 235000013343 vitamin Nutrition 0.000 description 2
- 229940088594 vitamin Drugs 0.000 description 2
- 229930003231 vitamin Natural products 0.000 description 2
- 206010013654 Drug abuse Diseases 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 229930191978 Gibberellin Natural products 0.000 description 1
- 241000238631 Hexapoda Species 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 241000607479 Yersinia pestis Species 0.000 description 1
- 230000000507 anthelmentic effect Effects 0.000 description 1
- 239000003242 anti bacterial agent Substances 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 230000000840 anti-viral effect Effects 0.000 description 1
- 229940088710 antibiotic agent Drugs 0.000 description 1
- 230000003851 biochemical process Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 210000003608 fece Anatomy 0.000 description 1
- 230000035558 fertility Effects 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000003448 gibberellin Substances 0.000 description 1
- IXORZMNAPKEEDV-OBDJNFEBSA-N gibberellin A3 Chemical class C([C@@]1(O)C(=C)C[C@@]2(C1)[C@H]1C(O)=O)C[C@H]2[C@]2(C=C[C@@H]3O)[C@H]1[C@]3(C)C(=O)O2 IXORZMNAPKEEDV-OBDJNFEBSA-N 0.000 description 1
- 239000010871 livestock manure Substances 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 230000035764 nutrition Effects 0.000 description 1
- 239000003895 organic fertilizer Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
- 230000002786 root growth Effects 0.000 description 1
- 239000002688 soil aggregate Substances 0.000 description 1
- 230000004936 stimulating effect Effects 0.000 description 1
- 208000011117 substance-related disease Diseases 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Landscapes
- Cultivation Of Seaweed (AREA)
- Fertilizers (AREA)
Abstract
The invention provides a method for preparing seaweed urea. Firstly, a concentrated seaweed extract is prepared; during the prilling process of urea, the concentrated seaweed extract and a fused urea solution are evenly mixed, wherein, the weight proportion of the concentrated seaweed extract and the urea added is 50 to 200:1000; then prilling is conducted in a prilling tower to prepare seaweed urea products. After the prilling of the concentrated seaweed extract and the fused urea, the concentrated seaweed extract exists in the form of solid seaweed extract, wherein, the weight percentage of the solid seaweed extract in the seaweed urea is 0.5 percent to 2 percent and the weight percentage of the urea is 98 percent to 99.5 percent. The combination of seaweed and urea can greatly improve the absorption and utilization ratio of urea, and meanwhile has the function of restraining the fast decomposition of urea contents and slowing down loss, thus effectively solving the problem of soil deterioration in current fertilization.
Description
Technical field
The invention belongs to the urea production technical field, is a kind of preparation method of seaweed urea specifically.
Background technology
The soil fertility of China biases toward the chemical fertilizer input at present, and ignores the use of organic fertilizer.China accounts for the arable land in the world 10% and has but consumed the chemical fertilizer in the world 30%, and the chemical fertilizer input amount of unit cultivated area is 2.8 times of the average consumption in the world.Wherein nitrogen fertilizer amount occupies first of the chemical fertilizer, and urea is the outstanding person in the nitrogenous fertilizer, and its nitrogen content is the main source of manure of agricultural up to 46.8%.But it is the unit quick-acting fertilizer after all, and nitrogen use efficiency is low, has only about 36% according to its utilization ratio of research.The serious situation that China has occurred is the high Fertilization Level of agricultural, and low utilization rate of fertilizer has caused the significant wastage of resource, and urea has ten million ton of loss every year.Utilization rate of fertilizer is low, and soil-borne disease insect pest aggravation causes severe environmental pollution and agricultural product quality to descend, and threatens the Sustainable development of national food safety and agricultural to a great extent.
Marine alga is handled through special biochemical process; Extract its elite material; Greatly kept the natural radioactivity component; Be rich in kind of mineral element and abundant VITAMINs surplus potassium, calcium, magnesium, iron, zinc, the iodine etc. 40 in the marine alga, contain peculiar Sargassum polysaccharides in the marine alga, protein, amino acid, highly unsaturated fatty acids and multiple natural phant growth regulator especially, have very high biological activity.
How marine alga is organically combined with urea, improve the absorption rate of urea, solve existing fertilizer and absorb too low problem, this is the problem that the present invention faces.
Summary of the invention
The objective of the invention is problem to the prior art existence; A kind of preparation method of seaweed urea is provided; Marine alga is combined with urea; Can improve the absorption rate of urea greatly, also play simultaneously and suppress the effect that urea components decomposes and slow down loss fast, solve the low excessively problem of fertilizer efficiency utilization ratio that exists in the urea fertilising effectively.
The objective of the invention is to realize through following technical scheme: a kind of preparation method of seaweed urea is characterized in that the preparation method is following:
Concentrate the preparation of seaweed extracted liquor earlier, in the granulation process of urea, will concentrate seaweed extracted liquor and fusing urea solution uniform mixing; Wherein, The part by weight that concentrates seaweed extracted liquor and urea is 50-200: 1000, then in the prilling tower granulation, process the seaweed urea product.
Improvement to above-mentioned preparation method: after concentrating seaweed extracted liquor and fusing urea granulation; Concentrated seaweed extracted liquor finally exists with the form of marine alga elite solid substance; Its weight percentage in seaweed urea is 0.5%-2%, and the weight of urea percentage composition is 98%-99.5%.
Further improvement to above-mentioned preparation method: described concentrated seaweed extracted liquor is to be carried, filter, concentrate and obtain through alkali by marine alga; Concentrate contain at least in the seaweed extracted liquor Tang oligosaccharide, plant-growth regulator, iodine and in, trace element, in, trace element is selected from calcium, magnesium, sulphur, copper, iron, manganese, zinc, boron, molybdenum.
Further improvement to above-mentioned preparation method: the concrete preparation process of described concentrated seaweed extracted liquor is: the marine alga of 50 weight parts and the water of 1000-1500 weight part are joined in the extractor; Add alkali 5-15 weight part then, and be warming up to the 60-80 degree gradually, be incubated 1-2 hour; Open then to stir and continue to extract 50-70 minute; Open dispensing valve after extraction is accomplished and filter, will filtrate vacuum concentration 2-3 times at last, described alkali is yellow soda ash or salt of wormwood or Pottasium Hydroxide.
Further improvement to above-mentioned preparation method: described marine alga is sea-tangle or Enteromorpha or sargassun or bulk kelp.
Further improvement to above-mentioned preparation method: described seaweed urea is the faint yellow particle of full dissolubility, and the marine alga smell is arranged, nitrogenous >=46%.
The present invention compared with prior art has many advantages and positively effect:
The present invention between its molecule is connected the fully reaction under the high-pressure smelting state that is combined in of marine alga and urea with chemical bond, the adding of marine alga can obviously improve specific absorption and the utilization ratio of crop to urea; Significantly improve crop quality, the structure of improving the soil promotes the formation of soil aggregate; Recover the soil lac balance that over-burden loses with chemical pollution; Help crop root growth,, alleviate aspects such as chemical fertilizer is out of proportion and have great importance improving farmland ecological environment.The present situation that China uses chemical fertilizer in a large number can be effectively alleviated in the use of seaweed urea, and it is healthy, fast-developing to promote China's green agriculture, has great importance to realizing China's agricultural sustainable development.
Contain abundant marine active composition in the marine alga synergistic urea according to the present invention's production; Wherein contain peculiar Sargassum polysaccharides in the marine alga, protein, amino acid, highly unsaturated fatty acids and multiple natural phant growth regulator; Have very high biological activity, also contain kind of mineral element and abundant VITAMINs surplus potassium, calcium, magnesium, iron, zinc, the iodine etc. 40.Especially the natural phant hormone in the marine alga, like plant hormone, Plant hormones regulators,gibberellins, type phytokinin, polyphenolic substance etc., but the generation of non-specific active factor in the stimulating plant body, the balance of regulating endogenous hormones.Materials such as the natural antibiotics that contains in the marine alga, polysaccharide, iodine have antibacterial significantly, antiviral and anthelminthic effect, and fertile medicine economic benefits and social benefits can be alleviated China's agricultural Drug abuse phenomenon to a certain extent, reduce environmental pollution.
Embodiment
The present invention is a kind of preparation method of seaweed urea, and concrete preparation method is following:
Concentrate the preparation of seaweed extracted liquor earlier, marine alga is mainly sea-tangle or Enteromorpha or sargassun or bulk kelp.The marine alga of 50 weight parts and the water of 1000-1500 weight part are joined in the extractor; Add alkali (alkali is yellow soda ash or salt of wormwood or Pottasium Hydroxide) 5-15 weight part then, and be warming up to the 60-80 degree gradually, be incubated 1-2 hour; Then; Open to stir and continue to extract 50-70 minute, open dispensing valve after extraction is accomplished and filter, the vacuum concentration 2-3 that will filtrate at last doubly; Concentrate contain in the seaweed extracted liquor Tang oligosaccharide, plant-growth regulator, iodine and in, the micro-element nutrition material, in, trace element is selected from calcium, magnesium, sulphur, copper, iron, manganese, zinc, boron, molybdenum.
In the granulation process of urea, will concentrate seaweed extracted liquor and fusing urea solution uniform mixing, wherein, the part by weight that concentrates seaweed extracted liquor and urea is 50-200: 1000, then in the prilling tower granulation, process the seaweed urea the finished product.Concentrated seaweed extracted liquor finally exists with the form of marine alga elite solid substance, and its weight percentage in seaweed urea is 0.5%-2%, and the weight of urea percentage composition is 98%-99.5%.Seaweed urea is the faint yellow particle of full dissolubility, and the marine alga smell is arranged, nitrogenous >=46%.
Instance 1:
Get the 30kg sea-tangle, add 800kg water, add 6kg yellow soda ash then, be warming up to 65 ℃, be incubated 2 hours, open stirring then, continue to stir and extracted 50-60 minute.With extracting liquid filtering, concentrated, before the granulating working procedure of urea production, add concentrated seaweed extracted liquor, the part by weight of contract seaweed extracted liquor and urea is 15: 100, then, carries out granulation and promptly obtains seaweed urea.
Instance 2:
Get the 30kg Enteromorpha, add 800kg water, add 3kg sodium hydroxide then, be warming up to 70 ℃, be incubated 1.5 hours, open stirring then, continue to stir and extracted 60 minutes.With extracting liquid filtering, concentrated, before the granulating working procedure of urea production, add concentrated seaweed extracted liquor, the part by weight of contract seaweed extracted liquor and urea is 10: 100, then, carries out granulation and promptly obtains seaweed urea.
Instance 3:
Get the 35kg sargassun, add 800kg water, add 6kg salt of wormwood then, be warming up to 75 ℃, be incubated 80 minutes, open stirring then, continue to stir and extracted 60-65 minute.With extracting liquid filtering, concentrated, before the granulating working procedure of urea production, add concentrated seaweed extracted liquor, the part by weight of contract seaweed extracted liquor and urea is 5: 100, then, carries out granulation and promptly obtains seaweed urea.
Instance 4:
Get the 30kg bulk kelp, add 800kg water, add 6kg yellow soda ash then, be warming up to 80 ℃, be incubated 1 hour, open stirring then, continue to stir and extracted 70 minutes.With extracting liquid filtering, concentrated, before the granulating working procedure of urea production, add concentrated seaweed extracted liquor, the part by weight of contract seaweed extracted liquor and urea is 20: 100, then, carries out granulation and promptly obtains seaweed urea.
Certainly, above-mentioned explanation is not to be limitation of the present invention, and the present invention is not limited to above-mentioned giving an example, those skilled in the art, and in essential scope of the present invention, the variation of making, remodeling, interpolation or replacement all should belong to protection scope of the present invention.
Claims (3)
1. the preparation method of a seaweed urea is characterized in that, the preparation method is following:
Concentrate the preparation of seaweed extracted liquor earlier, in the granulation process of urea, will concentrate seaweed extracted liquor and fusing urea solution uniform mixing; Wherein, The part by weight that concentrates seaweed extracted liquor and urea is 50-200: 1000, then in the prilling tower granulation, process the seaweed urea product; After described concentrated seaweed extracted liquor and the fusing urea granulation, concentrated seaweed extracted liquor finally exists with the form of marine alga elite solid substance, and its weight percentage in seaweed urea is 0.5%-2%, and the weight of urea percentage composition is 98%-99.5%; Described concentrated seaweed extracted liquor is to be carried, filter, concentrate and obtain through alkali by marine alga; Concentrate contain at least in the seaweed extracted liquor Tang oligosaccharide, plant-growth regulator, iodine and in, trace element, in, trace element is selected from calcium, magnesium, sulphur, copper, iron, manganese, zinc, boron, molybdenum; The concrete preparation process of described concentrated seaweed extracted liquor is: the marine alga of 50 weight parts and the water of 1000-1500 weight part are joined in the extractor; Add alkali 5-15 weight part then, and be warming up to the 60-80 degree gradually, be incubated 1-2 hour; Open then to stir and continue to extract 50-70 minute; Open dispensing valve after extraction is accomplished and filter, will filtrate vacuum concentration 2-3 times at last, described alkali is yellow soda ash or salt of wormwood or Pottasium Hydroxide.
2. according to the preparation method of the described seaweed urea of claim 1, it is characterized in that described marine alga is sea-tangle or Enteromorpha or sargassun or bulk kelp.
3. according to the preparation method of the described seaweed urea of claim 2, it is characterized in that described seaweed urea is the faint yellow particle of full dissolubility, has the marine alga smell, nitrogenous >=46%.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100147170A CN101486619B (en) | 2009-03-02 | 2009-03-02 | Process for preparing seaweed urea |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100147170A CN101486619B (en) | 2009-03-02 | 2009-03-02 | Process for preparing seaweed urea |
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| CN101486619A CN101486619A (en) | 2009-07-22 |
| CN101486619B true CN101486619B (en) | 2012-05-23 |
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| CN101891546B (en) * | 2010-07-17 | 2013-01-09 | 山东恩宝生物科技有限公司 | Alginic acid envelope sustained-release urea with urease inhibiting effect and preparation method thereof |
| CN102503705B (en) * | 2011-11-22 | 2013-09-04 | 史丹利化肥股份有限公司 | Melted pelleting green seaweed compound fertilizer and preparation method thereof |
| CN102503707A (en) * | 2011-11-22 | 2012-06-20 | 史丹利化肥股份有限公司 | Melted pelleting seaweed stable fertilizer and preparation method thereof |
| CN102515945B (en) * | 2011-12-06 | 2014-02-05 | 中国农业科学院农业资源与农业区划研究所 | Algae-enhanced urea, production method thereof, and purpose thereof |
| CN102584448B (en) * | 2012-02-17 | 2013-09-04 | 武汉艾利特化肥有限公司 | Compound fertilizer |
| CN102765999B (en) * | 2012-07-25 | 2014-12-24 | 北京雷力海洋生物新产业股份有限公司 | Algal polysaccharide modified urea and preparation method thereof |
| CN102795937A (en) * | 2012-09-06 | 2012-11-28 | 青岛丰泰海洋生物科技有限公司 | Seaweed oligosaccharide synergistic urea and preparation method thereof |
| CN103980040B (en) * | 2014-04-17 | 2016-08-17 | 威海温喜生物科技有限公司 | A kind of double algae oligosaccharide granular fertilizer and preparation method thereof |
| CN104261952B (en) * | 2014-09-29 | 2016-03-02 | 史丹利化肥股份有限公司 | A kind of containing algae essence swollen fruit type macroelement Water soluble fertilizer and preparation method thereof |
| CN105985199A (en) * | 2015-02-07 | 2016-10-05 | 中国海洋大学 | Method for preparing high quality seaweed fertilizer from eucheuma compound enzymatic hydrolysate |
| CN104761348A (en) * | 2015-03-25 | 2015-07-08 | 山东恩宝生物科技有限公司 | Alginic acid containing compound fertilizer with urease inhibiting effect and production method of alginic acid containing compound fertilizer |
| CN104876709A (en) * | 2015-05-18 | 2015-09-02 | 国家海洋局第三海洋研究所 | Method for preparing seaweed liquid fertilizer from seaweed |
| CN104909965B (en) * | 2015-06-08 | 2017-10-31 | 青岛海大生物集团有限公司 | The preparation method of chitin modified urea |
| CN105693379B (en) * | 2016-01-20 | 2019-11-08 | 领先生物农业股份有限公司 | A kind of seaweed polyglutamic acid urea and its production method |
| CN106397029A (en) * | 2016-08-31 | 2017-02-15 | 山东雷力绿色肥业有限公司 | High-activity seaweed compound fertilizer and preparation method thereof |
| US20210323885A1 (en) | 2018-08-28 | 2021-10-21 | Sabic Global Technologies B.V. | Seaweed extract coated fertilizer for better crops and soil health |
| CN109265256A (en) * | 2018-11-09 | 2019-01-25 | 中国农业科学院农业资源与农业区划研究所 | A kind of alginic acid synergistic carrier preparation method of the phosphorus ammonium suitable for acid soil |
| CN109336683A (en) * | 2018-11-09 | 2019-02-15 | 中国农业科学院农业资源与农业区划研究所 | A kind of alginic acid synergistic carrier preparation method of the urea suitable for acid soil |
| CN109206247A (en) * | 2018-11-09 | 2019-01-15 | 中国农业科学院农业资源与农业区划研究所 | A kind of alginic acid synergistic carrier preparation method of the urea suitable for basic soil |
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| CN101486619A (en) | 2009-07-22 |
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