Optical carbon chelate fertilizer, preparation method and application thereof

Abstract

The application belongs to the field of fertilizers, and particularly relates to a photo-carbon chelate fertilizer, a preparation method and application thereof. The photo-carbon chelate fertilizer comprises the following raw materials in parts by weight: 20-40 parts of organic matter, 10 parts of trace elements, 0.5-2 parts of polyglutamic acid or a derivative thereof, 1-3 parts of oligopeptide, 1-2 parts of modified adsorbent, 5-15 parts of chitooligosaccharide, 0.5-1 part of NKP fertilizer and 1-2 parts of water. The application has the advantages of simple preparation process, easily available raw materials, effectively increased fertilizer residence time, ensured fertilizer efficiency, improved fertilizer efficiency utilization rate, and good rooting, disease resistance, stress resistance and yield increasing effects for economic crops such as corn and rice.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of fertilizers, and particularly relates to a photo-carbon chelate fertilizer as well as a preparation method and application thereof. BACKGROUND

[0002] Fertilizer is a substance added to soil to supply nutrients for plants, and through the addition of fertilizer, the soil can be improved, and the agricultural production efficiency is improved, which is one of the material foundations of agricultural production. With the development of fertilization technology and agricultural production, more and more fertilizer products with the advantages of fast absorption, strong effect, small dosage, high efficiency and the like are selected in the market, which also leads to various fertilizers to meet various needs. During the growth period of plants, photosynthesis needs to be continuously carried out to provide sufficient energy for normal growth and development, so as to synthesize various enzymes required for its own function. In addition to nitrogen, phosphorus and potassium fertilizer, trace elements are also important nutrient elements necessary for plant organisms, and play an important role in the life activities of organisms. When a certain trace element is deficient, the growth and development of crops are obviously affected, the yield is reduced, the quality is decreased, and even withered and dead. The trace element chelate fertilizer is a fertilizer in which an organic chelating agent is reacted with zinc, copper, manganese, iron and other trace elements in a certain proportion, so that the elements are in a chelated state, and a fertilizer which is convenient for being absorbed and utilized by crops is formed.

[0003] The invention patent with the publication number CN118026775A discloses a trace element chelate fertilizer, a preparation method, application and fertilization method thereof. The trace element chelate fertilizer disclosed by the invention comprises the following components: urea 10-30 parts, potassium dihydrogen phosphate 10-20 parts, monoammonium phosphate 10-20 parts, potassium nitrate 10-20 parts, anhydrous magnesium sulfate 1-3 parts, zinc sulfate heptahydrate 1-2 parts, chelating agent 5-10 parts, and adhesive 3-5 parts. The trace element chelate fertilizer has the advantages of low production cost, being suitable for large-scale industrial production, and good chelation effect. However, the function of the chelate fertilizer is relatively single, and the universality is poor. When a plurality of special functional fertilizers are simply mixed and used in the prior art, the problem of poor utilization rate of fertilizer efficiency caused by the incompatibility of fertilizer components and poor durability of fertilizer efficiency release is often faced. SUMMARY

[0004] In view of the existing technical problems, the purpose of the present application is to provide a photo-carbon chelate fertilizer as well as a preparation method and application thereof. The preparation process of the present application is simple, the raw materials are easy to obtain, the residence time of the fertilizer is effectively increased, the fertilizer efficiency is ensured, the utilization rate of the fertilizer efficiency is improved, and the economic crops such as corn and rice have good rooting, disease resistance, stress resistance and yield increasing effects.

[0005] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows:

[0006] The present application provides a photo-carbon chelate fertilizer, which comprises the following raw materials in parts by weight: 20-40 parts of organic matter, 10 parts of trace elements, 0.5-2 parts of polyglutamic acid or a derivative thereof, 1-3 parts of oligopeptide, 1-2 parts of modified adsorbent, 5-15 parts of chitooligosaccharide, 0.5-1 part of NKP fertilizer and 1-2 parts of water.

[0007] In some embodiments of the present application, the organic matter is corn fermentation organic matter.

[0008] Preferably, the corn fermentation organic matter is obtained according to the preparation steps of humic liquid disclosed in CN103044144B Example II.

[0009] In some embodiments of the present application, the trace elements are a mixture of Fe, Zn, Mn, Mo and B.

[0010] Preferably, the trace elements are FeSO4·7H2O, ZnSO4·7H2O, MnSO4·7H2O, (NH4)6Mo7O 24 4H2O and H3BO3, which are mixed in a mass ratio of (1-2):(2-4):(0.5-1):(0.1-0.3):1.

[0011] In some embodiments of the present application, the polyglutamic acid or a derivative thereof is γ-polyglutamic acid or sodium γ-polyglutamate.

[0012] In some embodiments of the present application, the preparation steps of the modified adsorbent are as follows:

[0013] (1) The mesoporous adsorbent is added to an organic solvent containing a modifier, and after stirring and mixing at room temperature, vacuum is applied for 30-60 min, and then air is introduced for 10-30 min, and the above-mentioned vacuum and air introduction operations are repeated 1-3 times, and then the pretreated adsorbent is obtained by washing and drying;

[0014] (2) The pretreated adsorbent of step (1), ethanol and deionized water are mixed, and then dopamine hydrochloride and tris-hydroxymethyl aminomethane are added, and then tetraethyl orthosilicate is added, and the temperature is raised to 30-35℃ for oil bath treatment for 1-1.5 d, and then the modified adsorbent is obtained by suction filtration, washing and drying.

[0015] In some embodiments of the present application, in step (1), the mesoporous adsorbent is activated carbon or molecular sieve.

[0016] Preferably, in step (1), the mesoporous adsorbent is activated carbon.

[0017] In some embodiments of the present application, in step (1), the modifier is a nanoscale mixture of magnesium oxide and zinc oxide, and the mass ratio of the adsorbent and the modifier is 1:(1-1.6).

[0018] Preferably, the particle size of the magnesium oxide and zinc oxide is 15-20 nm.

[0019] In some embodiments of the present application, in step (1), the mass ratio of the magnesium oxide and zinc oxide is (0.3-0.7):1.

[0020] In some embodiments of the present application, in step (2), the mass ratio of the pretreated adsorbent of step (1), dopamine hydrochloride and tetraethyl orthosilicate is 1:(0.1-0.4):(1-3).

[0021] In some embodiments of the present application, the oligopeptide is fish oligopeptide or soybean oligopeptide.

[0022] In some embodiments of the present application, the NKP fertilizer is a mixture of urea, ammonium phosphate and potassium sulfate.

[0023] Preferably, the mass ratio of the urea, ammonium phosphate and potassium sulfate is 1:(1.2-1.6):(1.1-1.4).

[0024] In some embodiments of the present application, the mass ratio of the modified adsorbent and polyglutamic acid or its derivative is (0.8-1.5):1.

[0025] The present application mixes raw materials such as organic matter, trace elements, polyglutamic acid or its derivative, oligopeptide and oligosaccharide through specific preparation steps, and there is a good synergistic effect between each raw material under specific selection and proportioning. The present application has good rooting, disease resistance, stress resistance and yield increasing effect for economic crops such as corn and rice. On the other hand, the adsorbent is added as an additive, and water and carbon dioxide in the air are adsorbed and enriched around the stems and leaves of crops, so that the photosynthesis and photosynthetic efficiency are further enhanced, and the light carbon chelate fertilizer is promoted to take effect quickly.

[0026] In the present application, the adsorbent in the prior art is further modified, magnesium oxide and zinc oxide are added to the mesoporous adsorbent, and repeated washing is performed to remove the magnesium oxide and zinc oxide attached to the outer wall of the mesoporous adsorbent, so that the magnesium oxide and zinc oxide are all loaded in the mesoporous adsorbent, and the controlled release of the magnesium oxide and zinc oxide in the fertilizer system is realized. At the same time, the surface loaded with dopamine hydrochloride is deposited with tetraethyl orthosilicate to form a dendritic micro-nano structure, which synergistically prolongs the time of carbon dioxide capture, and compared with the prior art, the fertilizer efficiency of the light carbon chelate fertilizer prepared by the present application is greatly enhanced.

[0027] The present application can effectively reduce the volatilization and flocculation of polyglutamic acid or its derivatives in the raw material components, improve the stability of the system components, and the possible reason is that the reaction product of dopamine hydrochloride and tetraethyl orthosilicate on the surface of the adsorbent plays a certain adhesion effect, which promotes the good dispersion of each component of the light carbon chelate fertilizer, and reduces the volatilization and flocculation of polyglutamic acid or its derivatives.

[0028] The second aspect of the present application provides a preparation method of a light carbon chelate fertilizer, comprising the following steps:

[0029] S1: mixing trace elements, polyglutamic acid or its derivatives, oligopeptides and chitooligosaccharides into organic matter, and stirring to obtain a mixture for standby;

[0030] S2: mixing NKP fertilizer and water, mixing with the mixture of step S1, and adding a modified adsorbent and stirring uniformly to obtain the light carbon chelate fertilizer.

[0031] The third aspect of the present application also provides the application of the light carbon chelate fertilizer obtained by the above technical solution in corn and rice planting.

[0032] Compared with the prior art, the present application has the following beneficial effects:

[0033] (1) The preparation process of the present application is simple, the raw materials are easy to obtain, the residence time of the fertilizer is effectively increased during use, the fertilizer efficiency is ensured, the fertilizer utilization rate is improved, and the economic crops such as corn and rice have good rooting, disease resistance, stress resistance and yield increasing effect.

[0034] (2) The present application realizes good synergistic effect by mixing organic matter, trace elements, polyglutamic acid or its derivatives, oligopeptides and oligochitosan, and has good rooting, disease resistance, stress resistance and yield increasing effect on economic crops such as corn and rice; at the same time, the adsorbent is added as an additive, which adsorbs and enriches water and carbon dioxide in the air around the stems and leaves of crops, further enhances the photosynthesis and photosynthetic efficiency, and promotes the rapid effect of the light carbon chelate fertilizer.

[0035] (3) The present application loads magnesium oxide and zinc oxide in the mesoporous adsorbent, and repeatedly washes to remove the magnesium oxide and zinc oxide attached to the outer wall of the mesoporous adsorbent, so that they are all loaded in the mesoporous adsorbent, realizes the controllable release of magnesium oxide and zinc oxide in the fertilizer system, prolongs the time of carbon dioxide capture, and greatly enhances the fertilizer efficiency of the light carbon chelate fertilizer.

[0036] (4) The application effectively reduces the volatilization and flocculation of polyglutamic acid or its derivatives in raw material components by further regulating the ratio of modified adsorbent and polyglutamic acid or its derivatives, improves the stability of system components, reduces the volatilization and flocculation of polyglutamic acid or its derivatives while promoting the good dispersion of each component of the photo carbon chelate fertilizer, and retains the efficacy. DETAILED DESCRIPTION

[0037] The application will be described below in conjunction with specific embodiments. It should be noted that the following examples are examples of the application and are only used to illustrate the application, but not to limit the application. Other combinations and various modifications within the concept of the application can be made without departing from the spirit or scope of the application.

[0038] Unless otherwise specified, the related raw materials used in the following preparation examples, examples and comparative examples can be purchased from the market.

[0039] Unless otherwise specified, the organic matter used in the following preparation examples, examples and comparative examples is corn fermentation organic matter, which is obtained according to the preparation steps of humic liquid disclosed in Example 2 of CN103044144B; the trace elements are FeSO4·7H2O, ZnSO4·7H2O, MnSO4·7H2O, (NH4)6Mo7O 24 ·4H2O and H3BO3 mixed in a mass ratio of 1.5:3:0.7:0.2:1; the oligopeptide used is soybean oligopeptide; the NKP fertilizer used is urea, ammonium phosphate and potassium sulfate mixed in a mass ratio of 1:1.4:1.3; the particle sizes of magnesium oxide and zinc oxide used are both 15-20 nm.

[0040] Unless otherwise specified, the “suction filtration”, “washing” and “drying” used in the following preparation examples, examples and comparative examples can be freely selected by those skilled in the art, and the application is not limited.

[0041] Preparation Example 1

[0042] The preparation steps of the modified adsorbent are as follows:

[0043] (1) 2 g of activated carbon is added to 40 mL of acetone containing 0.8 g of magnesium oxide and 2 g of zinc oxide, kept at 25℃, stirred and mixed, vacuumed for 40 min, then air is introduced for 20 min, the above vacuuming and air introduction operations are repeated twice, and the pretreated adsorbent is obtained after washing and drying;

[0044] (2) 1 g of the pretreated adsorbent of step (1), 10 mL of ethanol and 5 mL of deionized water are mixed, 0.3 g of dopamine hydrochloride and 0.5 g of tris-hydroxymethyl aminomethane are added, and then 2 g of tetraethyl orthosilicate is added, the temperature is increased to 33℃ for oil bath treatment for 1.5 d, and the modified adsorbent is obtained after suction filtration, washing and drying.

[0045] Preparation Example 2

[0046] The preparation steps of the modified adsorbent are the same as those in Preparation Example 1, except that 3.6 g of magnesium oxide and zinc oxide with a mass ratio of 0.4:1 are added in step (1).

[0047] Preparation Example 3

[0048] The preparation steps of the modified adsorbent are the same as those in Preparation Example 1, except that the amount of dopamine hydrochloride added in step (2) is 0.5 g.

[0049] Preparation Example 4

[0050] The preparation steps of the modified adsorbent are the same as those in Preparation Example 1, except that the amount of tetraethyl orthosilicate added in step (2) is 3.5 g.

[0051] Preparation Example 5

[0052] The preparation steps of the modified adsorbent are as follows:

[0053] 2 g of activated carbon is added to 40 mL of acetone containing 2.6 g of magnesium oxide and 1 g of zinc oxide, and the mixture is stirred at 25°C. After stirring, the mixture is vacuumed for 40 min, and then air is introduced for 20 min. The vacuuming and air introduction are repeated twice. After washing and drying, the modified adsorbent is obtained.

[0054] Example 1

[0055] A photo-carbon chelate fertilizer comprises the following raw materials by weight: 30 parts of organic matter, 10 parts of trace elements, 1.3 parts of γ-polyglutamic acid, 2 parts of oligopeptide, 1.5 parts of a modified adsorbent, 12 parts of chitooligosaccharide, 0.7 parts of NKP fertilizer, and 1.5 parts of water.

[0056] The preparation method of the photo-carbon chelate fertilizer in this example is as follows:

[0057] S1: The trace elements, γ-polyglutamic acid, oligopeptide, and chitooligosaccharide are mixed and added to the organic matter, and the mixture is stirred to obtain a mixture for standby use;

[0058] S2: The NKP fertilizer and water are mixed, and then mixed with the mixture in step S1. The modified adsorbent is added and stirred uniformly to obtain the photo-carbon chelate fertilizer.

[0059] The modified adsorbent used in this example is obtained from Preparation Example 1.

[0060] Example 2

[0061] A photo-carbon chelate fertilizer comprises the following raw materials by weight: 20 parts of organic matter, 10 parts of trace elements, 0.5 parts of γ-polyglutamic acid, 1 part of oligopeptide, 1 part of a modified adsorbent, 5 parts of chitooligosaccharide, 0.5 parts of NKP fertilizer, and 1 part of water.

[0062] The preparation method of the light carbon chelate fertilizer of the present embodiment is as follows:

[0063] S1: Mix trace elements, γ-polyglutamic acid, oligopeptide and chitooligosaccharide into organic matter, stir and obtain a mixture for standby;

[0064] S2: Mix NKP fertilizer and water, then mix with the mixture of step S1, and then add modified adsorbent and stir uniformly to obtain the light carbon chelate fertilizer.

[0065] The modified adsorbent used in the present embodiment is obtained from Preparation Example 1.

[0066] Example 3

[0067] A light carbon chelate fertilizer, comprising the following raw materials by weight: 40 parts of organic matter, 10 parts of trace elements, 2 parts of γ-polyglutamic acid, 3 parts of oligopeptide, 2 parts of modified adsorbent, 15 parts of chitooligosaccharide, 1 part of NKP fertilizer and 2 parts of water.

[0068] The preparation method of the light carbon chelate fertilizer of the present embodiment is as follows:

[0069] S1: Mix trace elements, γ-polyglutamic acid, oligopeptide and chitooligosaccharide into organic matter, stir and obtain a mixture for standby;

[0070] S2: Mix NKP fertilizer and water, then mix with the mixture of step S1, and then add modified adsorbent and stir uniformly to obtain the light carbon chelate fertilizer.

[0071] The modified adsorbent used in the present embodiment is obtained from Preparation Example 1.

[0072] Example 4

[0073] A light carbon chelate fertilizer and its preparation method, the specific implementation manner is same as that of Example 1, the difference lies in that the modified adsorbent used in the present embodiment is obtained from Preparation Example 2.

[0074] Example 5

[0075] A light carbon chelate fertilizer and its preparation method, the specific implementation manner is same as that of Example 1, the difference lies in that the modified adsorbent used in the present embodiment is obtained from Preparation Example 3.

[0076] Example 6

[0077] A light carbon chelate fertilizer and its preparation method, the specific implementation manner is same as that of Example 1, the difference lies in that the modified adsorbent used in the present embodiment is obtained from Preparation Example 4.

[0078] Example 7

[0079] A light carbon chelate fertilizer and its preparation method, the specific implementation manner is same as that of Example 1, the difference lies in that the modified adsorbent used in the present embodiment is obtained from Preparation Example 5.

[0080] Example 8

[0081] A light carbon chelate fertilizer and a preparation method thereof, the specific implementation manner is the same as that of Example 1, except that the mass ratio of the modified adsorbent and gamma-polyglutamic acid in the raw materials of this embodiment is 1.7:1.

[0082] Comparative Example 1

[0083] A light carbon chelate fertilizer and a preparation method thereof, the specific implementation manner is the same as that of Example 1, except that in this embodiment, an equal amount of activated carbon is used to replace the modified adsorbent.

[0084] Performance testing:

[0085] The light carbon chelate fertilizers prepared in Examples 1-8 and Comparative Example 1 were subjected to the following application tests. The specific results are shown in Table 1.

[0086] Farmland Experiment

[0087] The field test method was adopted. The test corn variety was Jidan 33. The light carbon chelate fertilizer prepared in Examples 1-8 and Comparative Example 1 was used as a base fertilizer for corn planting. Ten days before sowing, it was applied 13 cm deep. 50 kg was used per mu of land. 2 mu of land was treated. 3 points were randomly arranged. Each point contained 30 m 2 After the corn matured, all the corn ears were broken off and weighed on site. The total weight was recorded as the yield of the experimental group. At the same time, 10 ears of corn were randomly collected from each site, and the length and weight of the ears were measured. The average value was taken. After natural air drying, the seeds were tested and the yield of corn with a moisture content of 14% was converted. The 100-kernel weight was measured and the average value was taken. The same method was used to apply conventional fertilizer to corn (CO(NH2)2150kg·hm 2 、P2O5 75kg·hm 2 、K2O 45kg·hm 2 ) was used as the blank control group, and the yield, ear length, ear weight, and 100-grain weight of the blank control group were measured respectively. The average values ​​were taken and substituted into the following formula to calculate the yield increase rate, where: yield increase rate = (yield of experimental group - yield of blank control group) / yield of blank control group × 100%.

[0088] Table 1

[0089] No. Cluster length (cm) Cluster thickness (cm) Average weight of 100 grains (g) Yield increase rate (%) Blank control group 18.76 16.05 36.50 - Example 1 20.17 17.14 40.12 25.03 Example 2 20.06 17.03 40.07 24.37 Example 3 20.02 16.99 39.97 23.94 Example 4 19.86 16.81 39.78 21.70 Example 5 19.81 16.79 39.87 21.53 Example 6 19.76 16.84 39.91 21.31 Example 7 19.53 16.62 39.47 19.16 Example 8 19.88 16.93 39.95 22.29 Comparative Example 1 18.65 15.81 38.83 16.83

[0090] From the test results of Examples 1-3 disclosed in Table 1, it can be seen that the light-carbon chelate fertilizer can maintain a relatively high ear length and ear weight of corn, and has an excellent yield-increasing effect.

[0091] From the comparison of Example 4, Example 5 and Example 6 with Example 1, it can be seen that when the adding amount of the mixture of magnesium oxide and zinc oxide in step (1) is changed, the adding amount of dopamine hydrochloride in step (2) is changed and the adding amount of tetraethyl orthosilicate in step (2) is changed respectively, the quality and yield of corn are reduced to different degrees when the modified adsorbent is prepared, Example 4 may inhibit the absorption of corn seeds to other nutrient elements, Example 5 may affect the balance of dispersion and agglomeration between the components of the photo-carbon chelate fertilizer, and Example 6 affects the time of carbon dioxide capture, which all affect the fertilizer efficiency of the photo-carbon chelate fertilizer; From the comparison of Example 7 with Example 1, it can be seen that when the modified adsorbent is not further surface modified when the modified adsorbent is prepared, the synergistic effect of the modified adsorbent on the components of the photo-carbon chelate fertilizer may be affected, resulting in a decrease in yield increase effect; From the comparison of Example 8 with Example 1, it can be seen that when the mass ratio of the modified adsorbent and γ-polyglutamic acid is changed, the problems of volatilization and flocculation of γ-polyglutamic acid may occur, which affect the fertilizer effect; From the comparison of Comparative Example 1 with Example 1, it can be seen that when activated carbon is used to replace the modified adsorbent in equal amount, the residence time and utility of the components of the fertilizer are affected, and the fertilization effect is not ideal.

[0092] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application is disclosed as above, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content without departing from the scope of the technical solution of the present application, and the equivalent embodiments are also included. Any simple modification, equivalent change and modification made according to the technical essence of the present application to the above embodiments are still within the scope of the technical solution.

Claims

1. A light carbon chelate fertilizer, characterized in that, The light carbon chelate fertilizer comprises the following raw materials in parts by weight: 20-40 parts of organic matter, 10 parts of trace elements, 0.5-2 parts of polyglutamic acid or its derivatives, 1-3 parts of oligopeptides, 1-2 parts of modified adsorbents, 5-15 parts of chitosan oligosaccharides, 0.5-1 parts of NKP fertilizer and 1-2 parts of water; The preparation steps of the modified adsorbent are as follows: (1) adding the mesoporous adsorbent to an organic solvent containing a modifier, maintaining room temperature, stirring and mixing, vacuuming for 30 to 60 minutes, and then introducing air for 10 to 30 minutes, repeating the above vacuuming and introducing air 1 to 3 times, washing, and drying to obtain a pretreated adsorbent; (2) mixing the pretreated adsorbent of step (1), ethanol and deionized water, adding dopamine hydrochloride and tris(hydroxymethyl)aminomethane, and then adding ethyl orthosilicate, heating to 30-35° C. in an oil bath for 1-1.5 days, filtering, washing and drying to obtain a modified adsorbent; In step (1), the mesoporous adsorbent is activated carbon; In step (1), the modifier is a nanoscale mixture of magnesium oxide and zinc oxide, and the mass ratio of the mesoporous adsorbent to the modifier is 1: (1-1.6); In step (1), the mass ratio of magnesium oxide to zinc oxide is (0.3-0.7):1; In step (2), the mass ratio of the pretreatment adsorbent, dopamine hydrochloride and tetraethyl orthosilicate in step (1) is 1:(0.1-0.4):(1-3); The mass ratio of the modified adsorbent to polyglutamic acid or its derivative is (0.8-1.5):1; The organic matter is corn fermented organic matter; The polyglutamic acid or its derivative is gamma-polyglutamic acid or sodium gamma-polyglutamate.

2. The light carbon chelate fertilizer according to claim 1, characterized in that The trace elements are a mixture of Fe, Zn, Mn, Mo and B.

3. A method for preparing the light carbon chelate fertilizer according to any one of claims 1 to 2, characterized in that: The following steps are involved: S1: adding trace elements, polyglutamic acid or its derivatives, oligopeptides and chitosan oligosaccharides to organic matter, stirring to obtain a mixture for later use; S2: Mixing the NKP fertilizer and water and then mixing with the mixture of step S1, then adding the modified adsorbent and stirring evenly to obtain the light carbon chelate fertilizer.

4. Use of the light-carbon chelate fertilizer according to any one of claims 1 to 2 or the light-carbon chelate fertilizer obtained by the preparation method according to claim 3 in corn and rice cultivation.