CN1785925A

CN1785925A - Chelated multielement composite fertilizer and its production

Info

Publication number: CN1785925A
Application number: CN 200410065449
Authority: CN
Inventors: 邵建华
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-12-06
Filing date: 2004-12-06
Publication date: 2006-06-14

Abstract

The present invention relates to a multicomponent complex fertilizer and its production method. It is characterized by that said production method includes the following steps: after the secondary and trace elements necessary for crops are chelated by amino acid, it uses organic fertilizer or silicon fertilizer as carrier, after the above-mentioned materials are mixed together and granulated, these granules and N,P,K fertilizer granules are mixed according to a certain ratio so as to obtain the invented complex fertilizer.

Description

Chelated multielement composite fertilizer and production thereof

The present invention relates to a kind of multi-element compound fertilizer and production method thereof.

The essential element of crop growth is 16 kinds of elements such as N, P, K, Ca, Mg, S, Fe, Zn, Mn, Cu, B, Mo, Cl, when lacking above-mentioned nutrition or nutrition supply imbalance, all can cause plant physiological disease treating, make stress resistance of plant poor, influence the output and the quality of agricultural-food.In order to address this problem, existing compound fertilizer be N, P, K are carried out after the granulation respectively composite, for farm crop provide the equilibrated macroelement.Because a large amount of chemical fertilizer that use, the natural circulation of trace element can't satisfy the needs of crop growth in the soil.Trace element in adding in fertilizer to solve the nutritional deficiency problem of farm crop, has caused the attention of agricultural science and technology circle.Composite fertilizer factory adds mixed granulation in N, P, the K fertilizer with the inorganic salt of middle trace element, it is that the trace element that plant is essential is allocated in N, P, the K fertilizer with inorganic salt that patent (number of patent application 93110957.4) has been introduced a kind of plant-physiology balancing agent, but owing to PO in the macroelement fertilizer ₄ ^3-With Ca ²⁺, Mg ²⁺, Fe ²⁺, Cu ²⁺, Mn ²⁺, Zn ²⁺Very easily generate water-fast inorganic salt and lose activity Deng metal ion, utilization ratio is very low.

Chinese patent application 97112535X discloses a kind of middle trace element compound fertilizer and preparation method thereof, nitrogen, phosphorus, potassium and moderate-element sulphur, magnesium, silicon that this compound manure is required with crop growth, trace elements iron, manganese, zinc, boron, and the housing of Crustacean and the residual body of part marine organisms are mixed forms.The middle trace element that this patent adds in the composite fertilizer all adds in the mode of inorganic salt, mixes the easy and PO in back with moderate-element ₄ ^3-Generate phosphoric acid salt and lost efficacy.Chinese patent application number 01125811.6 discloses a kind of method for preparing leaf fertilizer by chelating amino acids with trace elements, be characterized in the animal/vegetable protein being raw material, make aminoacid chelating microelement through processes such as hydrolysis, neutralization, desalination, chelating, spraying dryings.As sequestrant, trace element is in more stable state to this kind foliage fertilizer in making behind the trace element in the chelating, but only limits to foliage-spray with amino acid.Chinese patent (application number 96105618.5) effective amino-acid compound fertilizer and production method thereof, as sequestrant, the trace element back adds composite fertilizer in the chela, has effectively alleviated middle trace element and phosphatic reaction with amino acid, humic acids.But because the K stability of amino-acid chelate less than the phosphatic stability of middle trace element, still has quite a few to be converted into phosphoric acid salt and lost efficacy.

The present invention is granulation in the fertilizer such as the fertilizer that will add stable performance behind the organic acid chelatings such as the inorganic salt of middle trace element and amino acid, citric acid, tartrate, EDTA, siliceous fertilizer, add in N, P, the K particle fertilizer compositely after the granulation in proportion, effectively avoided middle trace element and PO ₄ ^3-Bad side reaction, kept the activity of middle trace element.

The present invention is achieved in that the moderate-element Ca that farm crop are essential, Mg and micro-Fe, Cu, Mn, Zn or beneficial element rare earth, Ni, Co, one or more of soluble inorganic salts such as Ti add sequestrant amino acid, citric acid, heat chelating in the solution such as EDTA, the concentration of sequestrant is 10-25%, middle trace element is 1 with the mol ratio of sequestrant: 2-3, the chelating time is 1-4h, temperature is 80-105 ℃, after the reaction solution sprayed into granulation in fertilizer or the siliceous fertilizer, add-on is counted 0.1-0.2% with middle trace element, after the granulation with N, P, K fertilizer is composite.The fertilizer of microelement chelate or siliceous fertilizer particle add-on account for the 10-30% of the fertile total amount of compound in containing.

Embodiment 1

Using from the concentration of discharging in the Gelucystine production is 2000 liters in the mother liquor that rises of 150-180g/, adds ZnSO ₄7H ₂O 50kg, FeSO ₄7H ₂O 200kg, MnSO ₄7H ₂O50kg, in 3000 liters of enamel reaction stills, the passageway is heated to 110 ℃, chelatropic reaction 3 hours, blowing evenly is sprayed on granulation dish and fertilizer granulation with the pressure pump pressurization, fertilizer per ton sprays into 80-120 and rises liquid, and granulation oven dry back and N, P, K particle are composite, are multi-element compound fertilizer.

Embodiment 2

Add 1800 liters in water in 3000 liters of enamel reaction stills, adding 250kg citric acid is straight-through to be steam heated to boiling, adds ZnCl after the dissolving successively ₂60kg, FeCl ₂75kg, MnCl ₂35kg, rare earth chloride 25kg, CuCl ₂5kg dissolving post-heating kept 3 hours for 100 ℃; surplus heat is sprayed on powdery siliceous fertilizer surface; 100 liters per ton of consumption; granulation on disk or cylinder tablets press; be particle citric acid multielement siliceous fertilizer after the oven dry; with composite in its adding N, P, the K compound, additional proportion is the 20-25% of the fertile gross weight of compound.

Embodiment 3

Adding 2000 liters of content in 3000 liters of enamel reaction stills is the amino acid mother liquor that 150-180g/ rises, and adds the 50kg citric acid, 10kgEDTA, and steam heating dissolving in passageway adds ZnSO successively ₄7H ₂O 50kg, FeSO ₄7H ₂O 80kg, MnSO ₄H ₂O 50kg, CuSO ₄5H ₂O 4kg, the heating chelating was continued 4 hours in the dissolving back, and surplus heat is sprayed on the weathered coal surface with chelate solution, add-on is 80-100 liter/T, and adds 10% attapulgite granulation, oven dry, its particle and N, P, K fertiliser granulates is composite, and additional proportion is the 20-25% of the fertile total amount of compound.

The compound fertilizer that utilizes the present invention to produce, successfully solved the problem of trace element difficulty in compound fertilizer, adding, through testing: this fertilizer makes increasing crop yield 5-10% than with nutrient composite fertilizer, because the nutrient balance supply has improved the quality of utilization rate of fertilizer and farm crop.

Claims

A multi-element compound fertilizer be middle trace element that farm crop are essential behind citric acid EDTA chelating with fertilizer or siliceous fertilizer as the carrier granulation, mixed formulated in proportion after the granulation with N, P, the fertile particle of K.
2. trace element is the inorganic salt of elements such as the essential Ca of farm crop, Mg, Fe, Zn, Mn, Cu, B, Mo in according to claim 1, amino acid is the aminoacids complex with gained after the animal/vegetable protein hydrolysis, and with sequestrant such as amino acid, citric acid, EDTA and middle trace element in molar ratio 2: 1.5-3 preparation back chelating is made little fertilizer in the amino acid.
3. carrier fertilizer according to claim 1 can be that human and animal excreta, stalk, the peat composed of rotten mosses, weathered coal and other contain organic industrial residue, little fertile add-on is 1-10% in the amino acid, prilling process can be disk granulation, cylinder granulation, also can be extruder grain.
4. the carrier siliceous fertilizer of trace element fertilizer is the Water Quenching Slag that Calucium Silicate powder, Magnesium Silicate q-agent are contained in Steel Plant, yellow phosphorus factory, perhaps flyash and fertilizer in according to claim 1.
5. be to be little fertile particle in the amino acid of carrier with fertilizer or siliceous fertilizer according to the preparation of claim 1 compound fertilizer, with N, P, K particle compound, add-on is the 5-25% of compound fertilizer.
6. the add-on of middle trace element according to claim 2 and kind are to determine according to rich the lacking with the demand percentage of different crops centering trace element of the soil essential element of different areas.