CN116283401A - Special water-soluble fertilizer for tropical and subtropical fruit trees and preparation method thereof - Google Patents

Special water-soluble fertilizer for tropical and subtropical fruit trees and preparation method thereof Download PDF

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Publication number
CN116283401A
CN116283401A CN202211611193.5A CN202211611193A CN116283401A CN 116283401 A CN116283401 A CN 116283401A CN 202211611193 A CN202211611193 A CN 202211611193A CN 116283401 A CN116283401 A CN 116283401A
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fertilizer
fruit trees
tropical
soluble fertilizer
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谭宏伟
温标堂
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    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05B—PHOSPHATIC FERTILISERS
    • C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
    • C05G3/60—Biocides or preservatives, e.g. disinfectants, pesticides or herbicides; Pest repellants or attractants
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
    • Y02P60/20—Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
    • Y02P60/21—Dinitrogen oxide [N2O], e.g. using aquaponics, hydroponics or efficiency measures

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Pest Control & Pesticides (AREA)
  • Plant Pathology (AREA)
  • Fertilizers (AREA)

Abstract

The invention relates to the technical field of agricultural fertilizers, and in particular discloses a special water-soluble fertilizer for tropical and subtropical fruit trees and a preparation method thereof, wherein the special water-soluble fertilizer for tropical and subtropical fruit trees comprises the following components in parts by weight: 2.2-2.6 parts of 30% Duzhanstele, 17-18 parts of potassium polyphosphate, 18-19 parts of potassium sulfate, 42-45 parts of urea, 18-19 parts of magnesium sulfate heptahydrate, 0.1-0.2 part of 10ppm inositol, 0.2-0.4 part of acetic acid and 0.2-0.3 part of citric acid. The inositol is chelated with nitrogen, phosphorus and potassium, toxic tombstone and the like, so that the utilization rate of the nitrogen, phosphorus and potassium fertilizer for the fruit trees can be improved, the utilization rate of the fertilizer reaches 55-60%, and the fertilizer is higher than that of the existing special fertilizer for various tropical and subtropical fruit trees. The water-soluble fertilizer is used for planting fruit trees such as mango and citrus, has a synergistic effect of the pesticide and fertilizer, can reduce the harm of diseases such as anthracnose, has the occurrence rate of the anthracnose less than 2.5%, is environment-friendly, and is convenient to popularize.

Description

Special water-soluble fertilizer for tropical and subtropical fruit trees and preparation method thereof
Technical Field
The invention belongs to the technical field of fertilizers, and particularly relates to a special water-soluble fertilizer for tropical and subtropical fruit trees and a preparation method thereof.
Background
Common tropical and subtropical fruits comprise oranges, mangoes, litchis, longans and the like, and the fruits are generally sweet and succulent, and are nutritional and delicious. Meanwhile, the fruit trees are very easy to generate diseases and insect pests. Wherein, anthracnose is a disease with high morbidity and heavy hazard, and is mainly represented by circular, multi-deformation and blackish brown spots on the positions of the leaves of the fruit trees, and finally, the leaves are wrinkled and distorted. As the disease deepens, fruit atrophy continues to spread, resulting in death of the entire fruit.
At present, a lot of fertilizers special for fruit trees in the market are available, but more places are focused on the supplement of nutritional ingredients, the utilization rate of the fertilizers is not high, meanwhile, efficient pesticide-fertilizer coordination cannot be achieved, and more demands of farmers cannot be met.
Disclosure of Invention
The invention aims to provide a special water-soluble fertilizer for tropical and subtropical fruit trees and a preparation method thereof, thereby overcoming the defects of low fertilizer utilization rate and incapability of drug fertilizer synergy of the existing water-soluble fertilizer for tropical and subtropical fruit trees. The invention provides a special water-soluble fertilizer for tropical and subtropical fruit trees, which comprises the following components in parts by weight:
2.2-2.6 parts of 30% Duzhanstele, 17-18 parts of potassium polyphosphate, 18-19 parts of potassium sulfate, 42-45 parts of urea, 18-19 parts of magnesium sulfate heptahydrate, 0.1-0.2 part of 10ppm inositol, 0.2-0.4 part of acetic acid and 0.2-0.3 part of citric acid.
Preferably, the 30% toxic tombstone and acetic acid are made into a compound, and the citric acid and the magnesium sulfate heptahydrate are made into the compound.
Preferably, the potassium polyphosphate contains P 2 O 5 45%, K-containing 2 O 45％。
Preferably, the potassium sulfate contains K 2 O 50％。
Preferably, the urea contains N46% and the magnesium sulfate heptahydrate contains MgO 11%.
Preferably, the weight ratio of nitrogen, phosphorus and potassium of the water-soluble fertilizer special for the tropical and subtropical fruit trees is 20:8:17, and contains MgO 2%. .
Another technical scheme of the application:
the preparation method of the special water-soluble fertilizer for the tropical and subtropical fruit trees comprises the following steps:
step S1: preparing 30% toxic tombstone and P-containing 2 O 5 45% and K 2 45% of O potassium polyphosphate containing K 2 50% of O potassium sulfate, 46% of urea containing N, 11% of magnesium sulfate heptahydrate containing MgO, 10ppm of inositol, 10% of acetic acid and 15% of citric acid;
step S2: spraying 10% acetic acid solution onto 100 kg of 30% tombstone to obtain acetic acid and tombstone compound for later use; spraying 15% citric acid solution onto 100 kg of magnesium sulfate heptahydrate to obtain a citric acid and magnesium sulfate heptahydrate compound for later use;
step S3: and uniformly mixing the acetic acid and the Duzhuiqi compound, potassium sulfate, urea, potassium polyphosphate, citric acid and magnesium sulfate heptahydrate compound in proportion to obtain a mixture of the special water-soluble fertilizer for the tropical and subtropical fruit trees.
Step S4: and (3) uniformly spraying 10ppm of inositol into the mixture of the special water-soluble fertilizer for the tropical and subtropical fruit trees, which is obtained in the step (S3), so as to obtain the required special water-soluble fertilizer for the tropical and subtropical fruit trees.
The special fertilizer and pesticide synergistic efficient water-soluble fertilizer for tropical and subtropical fruit trees is mainly used in mangoes and oranges. The application amount is 150-200 kg/mu, and the application is divided into 3-5 times.
Compared with the prior art, the invention has the following beneficial effects:
1. the special water-soluble fertilizer for tropical and subtropical fruit trees is used for planting fruit trees such as mango and citrus, has a synergistic effect of the pesticide and fertilizer, can reduce the damage of diseases such as anthracnose and the like, and has the occurrence rate of the anthracnose less than 2.5%. Meanwhile, the utilization rate of the nitrogen, phosphorus and potassium fertilizer reaches 55 to 60 percent, which is higher than that of the existing special fertilizer for various tropical and subtropical fruit trees.
2. The inositol of the water-soluble fertilizer special for tropical and subtropical fruit trees contains 6 hydroxyl groups, has certain chelation, can phosphorylate all 6 hydroxyl groups, can theoretically form at least 64 different types of inositol derivatives-inositol phosphates, and is considered to provide an important phosphorus source for biological groups in the absence of existing inorganic phosphate. The complex ligand of nitrogen, phosphorus, potassium, inositol, acetic acid and toxic tombstone is chelated, so that the growth of the root system of the fruit tree is effectively promoted, and the anthracnose resistance effect is improved.
3. The special fertilizer and pesticide synergistic efficient water-soluble fertilizer for tropical and subtropical fruit trees effectively improves the yield and production benefit of mangoes and oranges, realizes fertilizer and pesticide synergy, protects the environment and is convenient to popularize.
Detailed Description
The following detailed description of specific embodiments of the invention is, but it should be understood that the invention is not limited to specific embodiments.
Example 1
A special fertilizer and pesticide synergistic efficient water-soluble fertilizer for tropical and subtropical fruit trees, wherein nitrogen, phosphorus and potassium are as follows: 20-8-17 (containing MgO 2%). The preparation method of the water-soluble fertilizer comprises the following steps:
2.2 parts of 30% Duzhui tablet, 17 parts of potassium polyphosphate, 18 parts of potassium sulfate, 45 parts of urea, 18 parts of magnesium sulfate heptahydrate, 0.1 part of 10ppm inositol, 0.3 part of acetic acid and 0.3 part of citric acid.
Step S1: preparing 30% toxic tombstone and P-containing 2 O 5 45% and K 2 45% of O potassium polyphosphate containing K 2 45% of O potassium sulfate, 46% of urea containing N, 11% of magnesium sulfate heptahydrate containing MgO, 10ppm of inositol, 10% of acetic acid and 15% of citric acid.
Step S2: spraying 1000 ml of 10% acetic acid solution onto 100 kg of 30% toxic tombstone to obtain acetic acid and toxic tombstone compound for later use; 1000 ml of 15% strength citric acid solution is sprayed onto magnesium sulfate heptahydrate to obtain a compound of citric acid and magnesium sulfate heptahydrate for later use.
Step S3: preparing 100 kg of special fertilizer and drug synergistic high-efficiency water-soluble fertilizer (containing MgO 2%) for tropical and subtropical fruit trees, and using 2.5 kg of acetic acid and potassium sulfate (containing K) as complex 2 O50%) at 18.0 kg, urea (N46%) at 43.5 kg, potassium polyphosphate (P) 2 O 5 45％、K 2 45% of O) and 17.8 kg of citric acid and magnesium sulfate heptahydrate compound 18.3 kg of magnesium sulfate compound; and uniformly mixing the acetic acid and the Duzhuiqi compound, potassium sulfate, urea, potassium polyphosphate, citric acid and magnesium sulfate heptahydrate compound in proportion to obtain a mixture of the special water-soluble fertilizer for the tropical and subtropical fruit trees.
Step S4: and (3) uniformly spraying 10ppm of inositol into the mixture of the special water-soluble fertilizer for the tropical and subtropical fruit trees, which is obtained in the step (S3), so as to obtain the required special water-soluble fertilizer for the tropical and subtropical fruit trees.
Control 1: the weight ratio of nitrogen, phosphorus and potassium of the common water-soluble fertilizer special for fruit trees is as follows: 25-10-15%, and contains MgO 3%.
Application test 1-1: 150 kg of the fertilizer special for the tropical and subtropical fruit trees in the embodiment 1 and 150 kg of the fertilizer special for the common fruit trees in the comparison 1 are applied per mu. The fertilizer is dissolved in water and irrigated to mango trees of six years of age. The fertilizer is respectively applied in the flower bud differentiation period, the young fruit growth period and the fruit picking period, and 50 kg/mu each time. The effect of different fertilizers on mango growth is shown in table 1. Meanwhile, the field test of different nitrogen, phosphorus and potassium fertilizer application amounts, common fertilizer application amounts and blank control treatment (no fertilizer application) is adopted, namely, the field actual measurement method is adopted to measure the utilization rate of the nitrogen, phosphorus and potassium fertilizer.
Figure SMS_1
As can be seen from the comparison of the data in table 1, the mango yield is increased by 167 kg/mu and the yield is increased by 13.7% when the special fertilizer for the tropical and subtropical fruit trees is applied to the mangoes and the synergistic efficient water-soluble fertilizer is compared with the same amount of the special fertilizer for the common fruit trees; the utilization rate of the fertilizer and the pesticide synergistic high-efficiency water-soluble fertilizer for the tropical and subtropical fruit trees is 56.1 percent higher than that of the fertilizer and the pesticide synergistic high-efficiency water-soluble fertilizer for the common fruit trees, which is 39.6 percent higher than that of the fertilizer and the pesticide synergistic high-efficiency water-soluble fertilizer for the tropical and subtropical fruit trees; the incidence rate of the mango anthracnose by the synergistic high-efficiency water-soluble fertilizer special for the tropical and subtropical fruit trees is reduced by 10.4 percent compared with the incidence rate of the mango anthracnose by 13.1 percent by the special fertilizer for the common fruit trees.
Application test 1-2: 150 kg of the fertilizer special for the tropical and subtropical fruit trees in the embodiment 1 and 150 kg of the fertilizer special for the common fruit trees in the comparison 1 are applied per mu. The fertilizer is dissolved in water and then is dripped to the citrus trees with six ages. The fertilizer is respectively applied in the flower bud differentiation period, the young fruit growth period and the fruit picking period, and 50 kg/mu each time. The effect of different fertilizers on citrus growth is shown in table 2.
Table 2 the citrus effect comparison table (six years of age) of the fertilizer and pesticide synergistic high-efficiency water-soluble fertilizer special for tropical and subtropical fruit trees and the fertilizer special for common fruit trees produced by the method
Figure SMS_2
As can be seen from the comparison of the data in Table 2, the citrus yield is increased by 231 kg/mu and the yield is increased by 14.3% when the special fertilizer for the tropical and subtropical fruit trees is applied to the citrus and the synergistic high-efficiency water-soluble fertilizer is compared with the same amount of special fertilizer for the common fruit trees; the utilization rate of the fertilizer and the pesticide synergistic high-efficiency water-soluble fertilizer for the tropical and subtropical fruit trees is 55.4 percent higher than that of the fertilizer and the pesticide and the potash fertilizer for the common fruit trees, which are 37.1 percent higher than that of the fertilizer and the pesticide and the potash fertilizer for the common fruit trees; the occurrence rate of the anthracnose of the citrus with the synergistic high-efficiency water-soluble fertilizer for the tropical and subtropical fruit trees is reduced by 11.5 percent compared with the occurrence rate of the anthracnose of the mango with the common fruit tree special fertilizer by 13.7 percent.
Example 2
The special fertilizer and pesticide synergistic efficient water-soluble fertilizer for the tropical and subtropical fruit trees comprises the following components in parts by weight: 2.5 parts of 30% Duzhui tablet, 17.5 parts of potassium polyphosphate, 18.5 parts of potassium sulfate, 43.5 parts of urea, 18.5 parts of magnesium sulfate heptahydrate, 0.15 part of 10ppm inositol, 0.3 part of acetic acid and 0.2 part of citric acid. Preparing the 30% toxic tombstone and acetic acid into a compound, preparing the citric acid and the magnesium sulfate heptahydrate into the compound, and uniformly mixing all the components to obtain the required special fertilizer and pesticide synergistic efficient water-soluble fertilizer for the tropical and subtropical fruit trees.
Control 2: the water-soluble fertilizer of control 2 is similar to that of example 2, and differs in that: no inositol was added.
Control 3: the water-soluble fertilizer of control 3 is similar to that of example 2, and differs in that: inositol, citric acid and magnesium sulfate heptahydrate were not added.
Application test 2-1: special fertilizer and pesticide synergistic high-efficiency water-soluble fertilizer for tropical and subtropical fruit trees applied per mu and 200 kg of control water-soluble fertilizer. The foliar application of the mango tree is respectively carried out in the flower bud differentiation period and the young fruit growth period, and 100 kg/mu of the mango tree is carried out each time. The growth of mango tree is shown in table 3.
Table 3 mango effect comparison table (six years of age) of special fertilizer and pesticide synergistic high-efficiency water-soluble fertilizer for tropical and subtropical fruit trees produced by the method and control water-soluble fertilizer
Figure SMS_3
As can be seen from the comparison of the data in table 3, the mango yield is increased by 341 kg/mu and the yield is increased by 28.2% by applying the special fertilizer for tropical and subtropical fruit trees to mango and combining the efficient water-soluble fertilizer with the water-soluble fertilizer without inositol in control 2; the utilization rate of the nitrogen, phosphorus and potassium fertilizer is improved by 22.6 percent. Compared with the water-soluble fertilizer without inositol, citric acid and magnesium sulfate heptahydrate in the control 3, the special fertilizer and pesticide synergistic efficient water-soluble fertilizer for the tropical subtropical fruit trees has the mango yield of 402 kg/mu and the yield of 35%; the utilization rate of the nitrogen, phosphorus and potassium fertilizer is improved by 25.4 percent.
Application test 2-2: the fertilizer applied per mu in the example 2, the fertilizer applied per mu in the control 2 and the control 3 are 200 kg. The foliar application of the mango tree is respectively carried out in the flower bud differentiation period and the young fruit growth period, and 100 kg/mu of the mango tree is carried out each time. The fertilizer is applied to six-year-old citrus trees in combination with drip irrigation. The effect of different fertilizers on citrus growth is shown in table 4.
Table 4 citrus effect comparison table (six years old) of special fertilizer and pesticide synergistic high-efficiency water-soluble fertilizer for tropical and subtropical fruit trees and control fertilizer produced by the method
Figure SMS_4
As can be seen from the comparison of the data in table 4, the yield of mangoes is increased by 357 kg/mu and the yield is increased by 21.9% by comparing the special fertilizer and the pesticide synergistic high-efficiency water-soluble fertilizer for the tropical and subtropical fruit trees applied to the oranges with the water-soluble fertilizer without inositol added in the control 2; the utilization rate of the nitrogen, phosphorus and potassium fertilizer is improved by 22.7 percent. Compared with the water-soluble fertilizer without inositol, citric acid and magnesium sulfate heptahydrate in the control 3, the yield of citrus is increased by 436 kg/mu, and the yield is increased by 28.2%; the utilization rate of the nitrogen, phosphorus and potassium fertilizer is improved by 25.6 percent.
Example 3
The special fertilizer and pesticide synergistic efficient water-soluble fertilizer for the tropical and subtropical fruit trees comprises the following components in parts by weight: 2.6 parts of 30% Dupuzhi tablet, 18 parts of potassium polyphosphate, 19 parts of potassium sulfate, 44.5 parts of urea, 19 parts of magnesium sulfate heptahydrate, 0.2 part of 10ppm inositol, 0.4 part of acetic acid and 0.3 part of citric acid. Preparing the 30% toxic tombstone and acetic acid into a compound, preparing the citric acid and the magnesium sulfate heptahydrate into the compound, and uniformly mixing all the components to obtain the required special fertilizer and pesticide synergistic efficient water-soluble fertilizer for the tropical and subtropical fruit trees.
Control 4: the water-soluble fertilizer of control 4 is similar to that of example 3, except that: no 30% toxic tombstone was added.
Control 5: the water-soluble fertilizer of control 5 is similar to that of example 3, except that: no 30% toxic tombstone, acetic acid, citric acid and magnesium sulfate heptahydrate were added.
Application test 3-1: the application object is a six-year-old mango tree. The fertilizer and pesticide synergistic high-efficiency water-soluble fertilizer special for the tropical and subtropical fruit trees applied per mu is 200 kg, and the control fertilizer is 200 kg/mu. Wherein 50 kg/mu of each of the flower bud differentiation period, the flowers-falling period, the young fruit growth period and the fruit picking period is applied, and the rest are managed according to a normal method. The effect of the different fertilizers is shown in table 5.
Table 5 mango effect comparison table (six years of age) of special fertilizer and pesticide synergistic high-efficiency water-soluble fertilizer for tropical and subtropical fruit trees produced by the method and control water-soluble fertilizer
Figure SMS_5
As can be seen from the comparison of the data in Table 5, the occurrence rate of anthracnose of mango is reduced by 13.2% when the special fertilizer and pesticide for tropical and subtropical fruit trees are applied to mango and the synergistic efficient water-soluble fertilizer is compared with the water-soluble fertilizer without adding 30% of toxic tombstone in control 4. Compared with the control 5, the special fertilizer and pesticide synergistic high-efficiency water-soluble fertilizer for the tropical and subtropical fruit trees has the advantages that the occurrence rate of anthracnose of mangoes is reduced by 13.9%, and the yield of the mangoes is increased by 195 kg/mu.
Application test 2-2: the fertilizer applied per mu in example 3 and the fertilizer applied in control 4 and control 5 are 200 kg. Wherein, 50 kg/mu of fertilizer is applied to six-year-old citrus trees in the bud differentiation period, the flowers-off period, the young fruit increasing period and the fruit picking period respectively, and the fertilizer is applied to the six-year-old citrus trees in combination with drip irrigation. The rest are managed according to the conventional method. The effect of different fertilizers on citrus growth is shown in table 6.
Table 6 citrus effect comparison table (six years of age) of special fertilizer and pesticide synergistic high-efficiency water-soluble fertilizer for tropical and subtropical fruit trees and control fertilizer produced by the method
Figure SMS_6
As can be seen from the comparison of the data in Table 6, the occurrence rate of anthracnose of mango is reduced by 14.1% when the special fertilizer and pesticide for tropical and subtropical fruit trees are applied to citrus and the synergistic efficient water-soluble fertilizer is compared with the water-soluble fertilizer without adding 30% of toxic tombstone in control 4. Compared with the control 5, the special fertilizer and pesticide for the tropical subtropical fruit trees has the advantages that the occurrence rate of anthracnose of citrus is reduced by 14.5%, and the yield of mango is increased by 246 kg/mu.
In conclusion, the inositol is chelated with nitrogen, phosphorus and potassium, toxic tombstone and the like, so that the utilization rate of the nitrogen, phosphorus and potassium fertilizer for the fruit trees can be improved, and the utilization rate of the fertilizer reaches 55-60%, which is higher than that of the existing special fertilizer for various tropical and subtropical fruit trees. The water-soluble fertilizer is used for planting fruit trees such as mango and citrus, has a synergistic effect of the pesticide and fertilizer, can reduce the harm of diseases such as anthracnose, has the occurrence rate of the anthracnose less than 2.5%, is environment-friendly, and is convenient to popularize. The foregoing descriptions of specific exemplary embodiments of the present invention are presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application to thereby enable one skilled in the art to make and utilize the invention in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims (5)

1. The special water-soluble fertilizer for the tropical and subtropical fruit trees is characterized by comprising the following components in parts by weight:
2.2-2.6 parts of 30% Duzhanstele, 17-18 parts of potassium polyphosphate, 18-19 parts of potassium sulfate, 42-45 parts of urea, 18-19 parts of magnesium sulfate heptahydrate, 0.1-0.2 part of 10ppm inositol, 0.2-0.4 part of acetic acid and 0.2-0.3 part of citric acid.
2. The special water-soluble fertilizer for tropical and subtropical fruit trees according to claim 1, wherein 30% of toxic tombstone and acetic acid are made into a compound, and citric acid and magnesium sulfate heptahydrate are made into a compound.
3. The special water-soluble fertilizer for tropical and subtropical fruit trees, according to claim 1, wherein the weight ratio of nitrogen, phosphorus and potassium of the special water-soluble fertilizer for tropical and subtropical fruit trees is 20:8:17, and contains MgO 2%.
4. The method for preparing the special water-soluble fertilizer for the tropical and subtropical fruit trees, as claimed in any one of claims 1 to 3, is characterized by comprising the following steps:
step S1: preparing 30% toxic tombstone and P-containing 2 O 5 45% and K 2 45% of O potassium polyphosphate containing K 2 50% of O potassium sulfate, 46% of urea containing N, 11% of magnesium sulfate heptahydrate containing MgO, 10ppm of inositol, 10% of acetic acid and 15% of citric acid;
step S2: spraying acetic acid solution with the concentration of 10% onto 30% of the toxic tombstone to obtain a compound body of acetic acid and the toxic tombstone for later use; spraying citric acid solution with the concentration of 15% onto magnesium sulfate heptahydrate to obtain a citric acid and magnesium sulfate heptahydrate compound for later use;
step S3: uniformly mixing acetic acid and a complex of Duzhuiqi, potassium sulfate, urea, potassium polyphosphate, citric acid and a complex of magnesium sulfate heptahydrate in proportion to obtain a mixture of special water-soluble fertilizers for tropical and subtropical fruit trees;
step S4: and (3) uniformly spraying 10ppm of inositol into the mixture of the special water-soluble fertilizer for the tropical and subtropical fruit trees, which is obtained in the step (S3), so as to obtain the required special water-soluble fertilizer for the tropical and subtropical fruit trees.
5. The special fertilizer and pesticide synergistic efficient water-soluble fertilizer for tropical and subtropical fruit trees is mainly used in mangoes and oranges, and the application amount is 150-200 kg/mu, and the fertilizer and pesticide synergistic efficient water-soluble fertilizer is applied for 3-5 times.
CN202211611193.5A 2022-12-14 2022-12-14 Special water-soluble fertilizer for tropical and subtropical fruit trees and preparation method thereof Pending CN116283401A (en)

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