CN105198518A - Method for preparing rare earth multi-microelement chelating additive - Google Patents
Method for preparing rare earth multi-microelement chelating additive Download PDFInfo
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Abstract
The invention discloses a method for preparing a rare earth multi-microelement chelating additive. According to the technical scheme, the method includes the steps that an acid-resisting reaction kettle is used for preparing a chelating state solution of various single-component (double-component or three-component) microelements and rare earth; then the input quantity is calculated according to the content of effective nutrients in the microelement and rare earth chelating state solution in accordance with the formula fertilizer production requirement, and the chelating state solution is sequentially sprayed into a carrier-turfy soil; afterwards, the solution enters a roller to be stirred and dried to be turned into the rare earth multi-microelement chelating additive. According to the method, the rare earth and medium trace elements undergo a chelating reaction under the action of ethylenediamine tetraacetic acid (EDTA), so that the absorption and fixation to the additive by soil are reduced, and indissolvable salt is converted into soluble and active salt; the operation of the additive in bodies of plants is accelerated through radiating activity carrying of rare earth elements, and photosynthesis and assimilation participating capacity is improved, so that plant growth and activity are accelerated, and therefore the defect that single supplement of major elements and medium trace elements is purely considered in most of compound fertilizer is overcome, and balanced fertilization is fully achieved.
Description
Background technology
Middle and trace element is most important for the growth of plant.In plant content be 0.1% ~ 0.5% element such as calcium, magnesium, sulphur, silicon etc. be called moderate-element, in plant, content is called trace element between the essential nutrient element of 0.2 × 10-6 ~ 200 × 10-6, has zinc, boron, manganese, molybdenum, copper, iron, chlorine etc. 7 kinds.
At present, the medium trace element that China's most area all exists in various degree lacks, and the scope of micro-hidden hunger is far beyond the general expectation of people, China lack trace elements iron, copper, molybdenum, boron, manganese, zinc arable land account for 5%, 6.9%, 21.3%, 46.8%, 34.5% and 51.5% respectively, targetedly in Rational Application, micro-fertilizer, not only crop yield can be improved, and to improving the quality effect of agricultural-food clearly, the resistance of crop to disease, low temperature, high temperature, arid also effectively can be strengthened.
But, some trace element is lacked in soil, usually be not the insufficient total amount because of these trace elements in soil, but because their validity is low, in four kinds of forms that trace element exists in soil, there are three kinds of existing forms to be not easy absorbed by crops, only have water miscible trace element, be present in the soil solution, the easiest utilization absorbed by crops.Although the validity of different shape trace element differs greatly, also can mutually transform between them, and the potential of hydrogen of soil, air permeability and organic content etc. are the principal elements affecting this conversion.
Based on this, domestic and international most chemical fertilizers production producer and scientific research institution all attach great importance to macroelement (N, P
2o
5, K
2o) research in crop yield is being increased, outside the trace element fertilizers such as release copper sulfate, ferric sulfate, zinc sulfate, manganous sulfate, there is again unit to study in recent years and be proposed Chelated Manganese, chelated iron, chelated copper etc., but mostly these products are monomer fertilizer, use extremely inconvenient, consumption is difficult to grasp, and sometimes also causes the social problems such as fertilizer damage and soil pollution of area source, soil compaction.Because peasant is difficult to judge that the rich of trace element lacks technically, often cause the underproduction because of a small amount of insufficient investment, simultaneously expensive because of it, have impact on to a certain extent and popularize.
Existing achievement in research proves, containing a large amount of chemical elements in plant materials, almost in the periodic table of elements, naturally occurring chemical element comprises rare earth element and can find in plant materials, and rare earth element do as one likes matter is quite similar
lanthanum,
cerium,
praseodymium,
neodymiumdeng 15 kinds of elements and with
lanthanoncharacter is very similar
scandium,
yttriumtotally ten seven kinds elementary composition, though it is not proved to be the essential element into plant, large quantity research, test-results show, rare earth element has some characteristic similar to trace element, and appropriate rare earth element can strengthen the photosynthesis of plant, promotes that plant is to the absorption of nutrient, conversion and utilization, thus increase the accumulation of dry-matter, its biomass can not only be improved, improve its quality, crop can also be strengthened to arid, high temperature, low temperature, salt marsh, the resistivity of the adverse environmental factors such as disease and pest.Therefore, current urgent need research and development one is intended to activate medium trace element, the how micro-chelating additive of rare earth of coupling macroelement, to solve secondary and micro-element fertilizers kind, formulation is single, the problems such as the plant biomass therefore caused, quality decline, resistance difference, thus meet the demand of agriculture production and increasing peasant income.
Summary of the invention
The present invention is intended to the defect overcoming background technology, by rare earth chelating technique, activate medium trace element, coupling macroelement, thus make rare earth multicomponent chelating Chemical Mixed Fertilizer, macroelement fertilizer content is single in the market, secondary and micro-element fertilizers kind is single in effective solution, formulation is single, rich scarce inharmonious to nutritive element most in crop applying process, cause soil contamination problem, and the necessary nutritive element of each kind of plant is used and easily to be fixed by adsorption by soil afterwards, the problem that utilization ratio is low, realizes the balance fertilizing to plant and the object increased production, increase income.
For achieving the above object, the invention provides the preparation method of the how micro-chelating additive of a kind of rare earth, its technical scheme is:
Utilize acid-resistant reacting kettle to prepare various single component (or two, three components) medium trace element and rare earth Chelating state solution, it is sprayed into successively in high-quality turfy soil, become the how micro-chelating additive of rare earth through stirring, drying.Specifically comprise the following steps:
(1) rare earth Chelating state solution is prepared:
A, prepare rare earth chelated ferrous iron solution: the water adding rare-earth compound (being less than 75 microns of (μm) light rare earthss through process granularity) 0.1-0.3 part and 20-25 part in acid-resistant reacting kettle is mixed into pasty state, adds ferrous sulfate (FeSO
47H
2o, scale 18.5-19.3%) 5-10 part, stir 20 minutes at normal temperatures, make rare earth, ferric oxide solution, add 1---25 part EDTA (ethylenediamine tetraacetic acid (EDTA)) after being warmed to 40 DEG C, stir while adding, stop heating when temperature reaches 80 DEG C, continue to stir 1-2 hour, make the aqueous solution of rare earth chelated iron;
B, prepare rare earth Chelating state zinc solution: the water adding rare-earth compound (being less than 75 microns of (μm) light rare earthss through process granularity) 0.1-0.2 part and 20-25 part in acid-resistant reacting kettle is mixed into pasty state, adds zinc sulfate (ZnSO
27H
2o, Zn content 23%) 20-25 part, add water 25-30 part, heat and add 1-15 part EDTA (ethylenediamine tetraacetic acid (EDTA)) after 40 DEG C, stir while adding, stop heating when temperature reaches 60 DEG C, continue to stir 30-60 minute, make the aqueous solution of rare earth chelated zinc;
C, prepare rare earth Chelating state calcium magnesium phosphorus solution: the water adding rare-earth compound (being less than 75 microns of (μm) light rare earthss through process granularity) 0.3-0.5 part and 20-25 part in acid-resistant reacting kettle is mixed into pasty state, and (main component comprises Ca to add fused(calcium magnesium)phosphate
3(PO
4)
2, CaSiO
3, MgSiO
3; P
2o
5content 12-14%CaO content 25-30%SiO
2content about 40% content of MgO about 5%) 50-60 part, add water 25-30 part, heat and add 10-20 part EDTA (ethylenediamine tetraacetic acid (EDTA)) after 50 DEG C, stir while adding, stop heating when temperature reaches 80 DEG C, continue to stir 1-2 minor clock, make rare earth chelated multielement element (P
2o
5, CaO, SiO
2, MgO) the aqueous solution;
D, prepare rare earth Chelating state copper solutions: in acid-resistant reacting kettle, add rare-earth compound (being less than 75 microns of (μm) light rare earthss through process granularity) 0.3 part be mixed into pasty state with the water of 20-25 part, add copper sulfate (CuSO
45H
2o, Cu content 24-25%) 10-15 part, stir 30 minutes at normal temperatures, make rare earth, cupric oxide solution, add 10---20 part EDTA (ethylenediamine tetraacetic acid (EDTA)) after being warmed to 60 DEG C, stir while adding, stop heating when temperature reaches 100 DEG C, continue to stir 1-2 hour, make the aqueous solution of rare earth chelated copper;
E, prepare rare earth Chelating state manganese solution: in acid-resistant reacting kettle, add rare-earth compound (being less than 75 microns of (μm) light rare earthss through process granularity) 0.1 part be mixed into pasty state with the water of 20-25 part, add the manganous sulfate (MnSO of stoichiometric quantity
4h
2o, Mn scale 31%) 20-25 part, stir and add 5---20 part EDTA (ethylenediamine tetraacetic acid (EDTA)) after being warmed to 40 DEG C, stir while adding, stop heating when temperature reaches 90 DEG C, continue to stir 1-2 hour, make the aqueous solution of rare earth chelated copper;
F, prepare rare earth Chelating state molybdenum, B solution: in acid-resistant reacting kettle, add rare-earth compound (being less than 75 microns of (μm) light rare earthss through process granularity) 0.2 part be mixed into pasty state with the water of 20-25 part, add Ammonium Heptamolybdate ((NH4) 6Mo7024 of stoichiometric quantity, Mo scale 54%) 5-6 part, stir and add borax (Na after 20 minutes
2b
4o
710H
20, B17.5%) 50-60 part, and after being warmed to 40 DEG C, add 5---20 part EDTA (ethylenediamine tetraacetic acid (EDTA)), stir while adding 30-50 minute, make the aqueous solution of rare earth chelating molybdenum and chelating boron;
(2) the how micro-chelating additive of synthesizing rare-earth:
Carrier using high-quality turfy soil as rare earth Chelating state medium trace element, by available nutrient cubage input amount in medium trace element and rare earth Chelating state solution, rare earth Chelating state solution is sprayed in high-quality turfy soil successively, then enters drum agitation, oven dry becomes the how micro-chelating additive of rare earth.
The described rare-earth compound effective constituent of step (1) is (with R
2o
3for meter) content>=0.4%, than put intensity < 5 × 10--8 Curie/kilogram.
The organic content of the described high-quality turfy soil of step (2) is 55-65%, and amino acid is 30-40%, pH5.5-6.5, water content lower than 12%, fineness≤0.3 millimeter.
Described various medium trace element total content >=60%.
The present invention can overcome most composite fertilizer and consider merely macroelement (N, P
2o
5, K
2o), medium trace element (calcium (Ca), magnesium (Mg), sulphur (S), boron (B), zinc (Zn), manganese (Mn), molybdenum (Mo), copper (Cu) iron (Fe) etc.) single supplementary, peasant applies fertilizer inconvenience, consumption is difficult to the drawback grasped, fully realize balance fertilizing, particularly plant is to the different demands of medium trace element, can for the demand of Different Crop to chemical element, random allotment, with strong points; Under the effect of EDTA (ethylenediamine tetraacetic acid (EDTA)), chelatropic reaction is there is by rare earth and medium trace element, reduce the absorption of soil to it to fix, difficulty soluble salt is made to change into solvable, active salt, and carry its acceleration by the radioactivity of rare earth element and operate in plant materials, promote and participate in photosynthetic, assimilative capacity, and then accelerate plant-growth and vigor.
Accompanying drawing explanation
Accompanying drawing is basic flow sheet of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.
The present invention, according to Li Bixi (Liebig) the least factor law and Law of Barrel, in conjunction with Chinese soil nutrient supply level, on the basis seeking the maximum limiting factor of plant-growth, forms plant nutrient balance between supply and demand point, sets nutrient supply amount with this.
The present invention has taken into full account each element and inorganic salt antagonistic action each other thereof, the monomer inorganic salt of design or mixed inorganic acid-resistant reacting kettle, can realize product temperature, feed intake, the reaction times is controllable, all-in and all-out.
Embodiment 1 utilizes acid-resistant reacting kettle to prepare single component (or two, three components) trace element and rare earth Chelating state solution:
Prepare rare earth chelated ferrous iron solution: the water adding rare-earth compound (being less than 75 microns of (μm) light rare earthss through process granularity) 0.1-0.3 part and 20-25 part in acid-resistant reacting kettle is mixed into pasty state, adds ferrous sulfate (FeSO
47H
2o, scale 18.5-19.3%) 5-10 part, stir 20 minutes at normal temperatures, make rare earth, ferric oxide solution, add 1---25 part EDTA (ethylenediamine tetraacetic acid (EDTA)) after being warmed to 40 DEG C, stir while adding, stop heating when temperature reaches 80 DEG C, continue to stir 1-2 hour, make the aqueous solution of rare earth chelated iron.The content of its active iron to add stoichiometric quantity and be directly proportional, synthesis input amount take add-on as foundation;
Prepare rare earth Chelating state zinc solution: the water adding rare-earth compound (being less than 75 microns of (μm) light rare earthss through process granularity) 0.1-0.2 part and 20---25 part in acid-resistant reacting kettle is mixed into pasty state, adds zinc sulfate (ZnSO
27H
2o, Zn content 23%) 20-25 part, add water 25-30 part, heat and add 1-15 part EDTA (ethylenediamine tetraacetic acid (EDTA)) after 40 DEG C, stir while adding, stop heating when temperature reaches 60 DEG C, continue to stir 30-60 minute, make the aqueous solution of rare earth chelated zinc, synthesis input amount is to add stoichiometric quantity for foundation;
Prepare rare earth Chelating state calcium magnesium phosphorus: the water adding rare-earth compound (being less than 75 microns of (μm) light rare earthss through process granularity) 0.3-0.5 part and 20-25 part in acid-resistant reacting kettle is mixed into pasty state, and (main component comprises Ca to add fused(calcium magnesium)phosphate
3(PO
4)
2, CaSiO
3, MgSiO
3; P
2o
5content 12-14%CaO content 25-30%SiO
2content about 40% content of MgO about 5%) 50-60 part, add water 25-30 part, heat and add 10-20 part EDTA (ethylenediamine tetraacetic acid (EDTA)) after 50 DEG C, stir while adding, stop heating when temperature reaches 80 DEG C, continue to stir 1-2 minor clock, make rare earth chelated multielement element (P
2o
5, CaO, SiO
2, MgO) the aqueous solution, synthesis input amount to add stoichiometric quantity for foundation;
Prepare rare earth Chelating state copper solutions: in acid-resistant reacting kettle, add rare-earth compound (being less than 75 microns of (μm) light rare earthss through process granularity) 0.3 part be mixed into pasty state with the water of 20-25 part, add copper sulfate (CuSO
45H
2o, Cu content 24-25%) 10-15 part, stir 30 minutes at normal temperatures, make rare earth, cupric oxide solution, add 10---20 part EDTA (ethylenediamine tetraacetic acid (EDTA)) after being warmed to 60 DEG C, stir while adding, stop heating when temperature reaches 100 DEG C, continue to stir 1-2 hour, make the aqueous solution of rare earth chelated copper.The content of its active copper to add stoichiometric quantity and be directly proportional, synthesis input amount take add-on as foundation;
Prepare rare earth Chelating state manganese solution: in acid-resistant reacting kettle, add rare-earth compound (being less than 75 microns of (μm) light rare earthss through process granularity) 0.1 part be mixed into pasty state with the water of 20-25 part, add the manganous sulfate (MnSO of stoichiometric quantity
4h
2o, Mn scale 31%) 20-25 part, stir and add 5---20 part EDTA (ethylenediamine tetraacetic acid (EDTA)) after being warmed to 40 DEG C, stir while adding, stop heating when temperature reaches 90 DEG C, continue to stir 1-2 hour, make the aqueous solution of rare earth chelated copper, the content of its active copper to add stoichiometric quantity and be directly proportional.Synthesis input amount take add-on as foundation;
Prepare rare earth Chelating state molybdenum, B solution: in acid-resistant reacting kettle, add rare-earth compound (being less than 75 microns of (μm) light rare earthss through process granularity) 0.2 part be mixed into pasty state with the water of 20-25 part, add Ammonium Heptamolybdate ((NH4) 6Mo7024 of stoichiometric quantity, Mo scale 54%) 5-6 part, stir and add borax (Na after 20 minutes
2b
4o
710H
2o, B17.5%) 50-60 part, and after being warmed to 40 DEG C, add 5---20 part EDTA (ethylenediamine tetraacetic acid (EDTA)), stir while adding, 30-50 minute, make the aqueous solution of rare earth chelating molybdenum and chelating boron.The content of its active molybdenum, boron to add stoichiometric quantity and be directly proportional, synthesis input amount take add-on as foundation;
The how micro-chelating additive of synthesizing rare-earth: the carrier using high-quality turfy soil as rare earth Chelating state medium trace element, again according to the requirement of production formula fertilizer, by trace element and available nutrient cubage input amount in rare earth Chelating state solution, rare earth Chelating state solution is sprayed in high-quality turfy soil successively, then enters drum agitation, oven dry becomes the how micro-chelating additive of rare earth.
Embodiment 2 utilizes rare earth multicomponent chelating additive and monoammonium phosphate, potassium sulfate (Repone K), urea, wilkinite etc. to be processed into the rare earth multicomponent chelating Chemical Mixed Fertilizer of different prescription by set amount, prescription 1:N-15+P
2o
5-5+k
2o-10>=30%, rare earth, Chelating state medium trace element>=10.0%, organic, organic acid>=10.0%.Through applying on potato, performance is emerged 1-2 days in advance, and plant strain growth is sane, and knot potato increases by 10%, than contrast (current application by peasants containing N, P
2o
5, k
2o composite fertilizer) when reducing fertilizers input 30%, mu volume increase more than 25%, increases income more than 1000 yuan.
Embodiment 3 utilizes rare earth multicomponent chelating additive and monoammonium phosphate, potassium sulfate (Repone K), urea, wilkinite etc. to be processed into the rare earth multicomponent chelating Chemical Mixed Fertilizer of different prescription by set amount, prescription 2:N-18+P
2o
5-12+k
2o-6>=36%, rare earth, Chelating state medium trace element>=10.0%, organic, organic acid>=10.0%.1. through applying on cucumber, performance leaf look dark green light, 3-5 days in advance of blooming, than contrast (current application by peasants containing N, P
2o
5, k
2o composite fertilizer) mu volume increase more than 20% and cucumber fragrant in taste, pure taste.2. through applying on wild cabbage, performance leaf look dark green, and blade is thick, listing in 7 days in advance, than contrast (current application by peasants containing N, P
2o
5, k
2o composite fertilizer) mu volume increase more than 10%, mu increases income more than 200 yuan.
Embodiment 4 utilizes rare earth multicomponent chelating additive and monoammonium phosphate, potassium sulfate (Repone K), urea, wilkinite etc. to be processed into the rare earth multicomponent chelating Chemical Mixed Fertilizer of different prescription by set amount, prescription 3:N-18+P
2o
5-8+k
2o-12>=38%, rare earth, Chelating state medium trace element>=10.0%, organic, organic acid>=10.0%.Through applying on corn, performance is emerged 2 days in advance, the dark green light of whole leaf look in vegetative period, and aerial root increases layer 2-3, and lodging tolerance strengthens, straw staygreen, than contrast (current application by peasants containing N, P
2o
5, k
2o composite fertilizer), thousand seed weight increases 15-20 gram, mu volume increase more than 15%.
Claims (4)
1. the preparation method of the how micro-chelating additive of rare earth, it is characterized in that, acid-resistant reacting kettle is utilized to prepare various single component (or two, three components) medium trace element and rare earth Chelating state solution, it is sprayed into successively in high-quality turfy soil, become the how micro-chelating additive of rare earth through stirring, drying, specifically comprise the following steps:
(1) rare earth Chelating state solution is prepared:
A, prepare rare earth chelated ferrous iron solution: the water adding rare-earth compound (being less than 75 microns of (μm) light rare earthss through process granularity) 0.1-0.3 part and 20-25 part in acid-resistant reacting kettle is mixed into pasty state, adds ferrous sulfate (FeSO
47H
2o, scale 18.5-19.3%) 5-10 part, stir 20 minutes at normal temperatures, make rare earth, ferric oxide solution, add 1---25 part EDTA (ethylenediamine tetraacetic acid (EDTA)) after being warmed to 40 DEG C, stir while adding, stop heating when temperature reaches 80 DEG C, continue to stir 1-2 hour, make the aqueous solution of rare earth chelated iron;
B, prepare rare earth Chelating state zinc solution: the water adding rare-earth compound (being less than 75 microns of (μm) light rare earthss through process granularity) 0.1-0.2 part and 20-25 part in acid-resistant reacting kettle is mixed into pasty state, adds zinc sulfate (ZnSO
27H
2o, Zn content 23%) 20-25 part, add water 25-30 part, heat and add 1-15 part EDTA (ethylenediamine tetraacetic acid (EDTA)) after 40 DEG C, stir while adding, stop when temperature reaches 60C heating, continue to stir 30-60 minute, make the aqueous solution of rare earth chelated zinc;
C, prepare rare earth Chelating state calcium magnesium phosphorus solution: the water adding rare-earth compound (being less than 75 microns of (μm) light rare earthss through process granularity) 0.3-0.5 part and 20-25 part in acid-resistant reacting kettle is mixed into pasty state, and (main component comprises Ca to add fused(calcium magnesium)phosphate
3(PO
4)
2, CaSiO
3, MgSiO
3; P
2o
5content 12-14%CaO content 25-30%SiO
2content about 40% content of MgO about 5%) 50-60 part, add water 25-30 part, heat and add 10-20 part EDTA (ethylenediamine tetraacetic acid (EDTA)) after 50 DEG C, stir while adding, stop heating when temperature reaches 80 DEG C, continue to stir 1-2 minor clock, make rare earth chelated multielement element (P
2o
5, CaO, SiO
2, MgO) the aqueous solution;
D, prepare rare earth Chelating state copper solutions: in acid-resistant reacting kettle, add rare-earth compound (being less than 75 microns of (μm) light rare earthss through process granularity) 0.3 part be mixed into pasty state with the water of 20-25 part, add copper sulfate (CuSO
45H
2o, Cu content 24-25%) 10-15 part, stir 30 minutes at normal temperatures, make rare earth, cupric oxide solution, add 10-20 part EDTA (ethylenediamine tetraacetic acid (EDTA)) after being warmed to 60 DEG C, stir while adding, stop heating when temperature reaches 100 DEG C, continue to stir 1-2 hour, make the aqueous solution of rare earth chelated copper;
E, prepare rare earth Chelating state manganese solution: in acid-resistant reacting kettle, add rare-earth compound (being less than 75 microns of (μm) light rare earthss through process granularity) 0.1 part be mixed into pasty state with the water of 20-25 part, add the manganous sulfate (MnSO of stoichiometric quantity
4h
2o, Mn scale 31%) 20-25 part, stir and add 5---20 part EDTA (ethylenediamine tetraacetic acid (EDTA)) after being warmed to 40 DEG C, stir while adding, stop heating when temperature reaches 90 DEG C, continue to stir 1-2 hour, make the aqueous solution of rare earth chelated copper;
F, prepare rare earth Chelating state molybdenum, B solution: in acid-resistant reacting kettle, add rare-earth compound (being less than 75 microns of (μm) light rare earthss through process granularity) 0.2 part be mixed into pasty state with the water of 20-25 part, add Ammonium Heptamolybdate ((NH4) 6Mo7024 of stoichiometric quantity, Mo scale 54%) 5-6 part, stir and add borax (Na after 20 minutes
2b
4o
710H
2o, B17.5%) 50-60 part, and after being warmed to 40 DEG C, add 5---20 part EDTA (ethylenediamine tetraacetic acid (EDTA)), stir while adding 30-50 minute, make the aqueous solution of rare earth chelating molybdenum and chelating boron;
(2) the how micro-chelating additive of synthesizing rare-earth:
Carrier using high-quality turfy soil as rare earth Chelating state medium trace element, by available nutrient cubage input amount in medium trace element and rare earth Chelating state solution, rare earth Chelating state solution is sprayed in high-quality turfy soil successively, then enters drum agitation, oven dry becomes the how micro-chelating additive of rare earth.
2. the preparation method of the how micro-chelating additive of rare earth according to claim 1, is characterized in that, the rare-earth compound effective constituent described in step (1) is (with R
2o
3for meter) content>=0.4%, than put intensity < 5 × 10-8 Curie/kilogram.
3. the preparation method of the how micro-chelating additive of rare earth according to claim 1, is characterized in that, the organic content of the high-quality turfy soil described in step (2) is 55-65%, amino acid is 30-40%, pH5.5-6.5, water content lower than 12%, fineness≤0.3 millimeter.
4. the preparation method of the how micro-chelating additive of rare earth according to claim 1, is characterized in that, described various medium trace element total content >=60%.
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| CN105461459A (en) * | 2015-12-31 | 2016-04-06 | 深圳市芭田生态工程股份有限公司 | Fertilizer synergist and preparation method and application thereof |
| CN107200668A (en) * | 2017-07-20 | 2017-09-26 | 沣田宝农业科技有限公司 | A kind of N P and K decrement type multi-element chelate Chemical Mixed Fertilizer |
| CN107285941A (en) * | 2016-04-01 | 2017-10-24 | 沣田宝农业科技有限公司 | A kind of preparation technology of double more micro- additives of chelating |
| CN110419635A (en) * | 2019-08-05 | 2019-11-08 | 宁夏大田新天地生物工程有限公司 | A kind of additive widening beef cattle skeleton and its application method |
| CN111592386A (en) * | 2020-06-10 | 2020-08-28 | 河南中之州植保有限公司 | Preparation method of chelated rare earth |
| CN115417721B (en) * | 2022-09-16 | 2024-04-19 | 南昌常茂新材料有限公司 | Preparation method of high-purity chelated rare earth fertilizer |
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| CN107285941A (en) * | 2016-04-01 | 2017-10-24 | 沣田宝农业科技有限公司 | A kind of preparation technology of double more micro- additives of chelating |
| CN107200668A (en) * | 2017-07-20 | 2017-09-26 | 沣田宝农业科技有限公司 | A kind of N P and K decrement type multi-element chelate Chemical Mixed Fertilizer |
| CN110419635A (en) * | 2019-08-05 | 2019-11-08 | 宁夏大田新天地生物工程有限公司 | A kind of additive widening beef cattle skeleton and its application method |
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