CN111233550A - Humic acid water-soluble fertilizer suitable for hickory planting and preparation method and application thereof - Google Patents
Humic acid water-soluble fertilizer suitable for hickory planting and preparation method and application thereof Download PDFInfo
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- 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
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C21/00—Methods of fertilising, sowing or planting
- A01C21/005—Following a specific plan, e.g. pattern
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G13/00—Protecting plants
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B1/00—Superphosphates, i.e. fertilisers produced by reacting rock or bone phosphates with sulfuric or phosphoric acid in such amounts and concentrations as to yield solid products directly
- C05B1/02—Superphosphates
Abstract
The invention belongs to the field of fertilizers and the field of hickory planting. A humic acid water-soluble fertilizer suitable for planting hickory nuts comprises 40-65% of humic acid and an inorganic compound fertilizer by weight percent. The water-soluble fertilizer is used for planting the pecans, so that a good effect is achieved.
Description
Technical Field
The invention belongs to the field of fertilizers and the field of pecan planting, and particularly provides a water-soluble fertilizer suitable for pecan planting, which contains sulfonated lignite potassium humate and a specific preparation method of the sulfonated lignite potassium humate.
Background
The hickory nut belongs to the genus hickory of the family juglandaceae, has high nutritive value and high economic value, and is an important economic crop in multiple areas of south and north China. According to the research of Zhejiang province agricultural academy of sciences, the problems of soil acidification, serious root rot and dry rot of fungal diseases and low potassium content commonly exist in Chinese hickory nut planting areas, the stability, the continuity and the high yield of the hickory nut are maintained, and the soil in the areas needs to be maintained and improved.
Humic acid is a complex network of macromolecules containing a large number of different functional groups as well as carbon, hydrogen, oxygen, nitrogen, sulfur and other metal elements. Humic acid is mainly formed by animal and plant remains in water bodies under the action of geological conditions and microorganisms, and a large amount of humic acid components exist in peat, weathered coal and lignite. Humic acid can improve soil properties, change soil nutrient composition and increase soil biological activity, and is widely applied to fertilizer preparation, desert greening and barren soil improvement. In order to improve the water solubility of the humic acid and further improve the application effect and convenience, the humic acid can be subjected to sulfonation modification, and the used sulfonating agent mainly comprises sulfuric acid, sulfur trioxide, sulfur dioxide, sulfite and the like; the sulfuric acid method has high sulfonation rate and low cost, but has the defects of wastewater treatment and subsequent alkalization processes; the raw materials and equipment components for treating sulfur trioxide and sulfur dioxide are high; the sulfite method has mild reaction conditions but poor sulfonation effect, and is less in application at present.
The soil in the pecan planting area is improved, and the method for preparing the potassium humate from lignite with higher economy and efficiency is needed.
Disclosure of Invention
In order to solve the problems, the inventor invents a humic acid water-soluble fertilizer suitable for pecan planting, the water-soluble fertilizer adopts sulfonated lignite humic acid products as main components, the sulfonated lignite humic acid products are sulfonated by using hydrogen peroxide and then using a small amount of sulfuric acid to match with sulfite, and the sulfonated lignite potassium humate with high water solubility/dispersibility can be prepared without using a dispersing agent. The sulfonated lignite potassium humate is used for planting the pecans, so that a good effect is achieved.
On one hand, the application provides a humic acid water-soluble fertilizer suitable for pecan planting, which comprises 40-65% of humic acid and an inorganic compound fertilizer by weight percent; the inorganic compound fertilizer comprises the following components:
the total nitrogen and P2O5、K2The humic acid is a sulfonated lignite humic acid product.
Further, the humic acid accounts for 45-60% by weight; the inorganic compound fertilizer comprises the following components:
the total nitrogen and P2O5、K2The humic acid is a sulfonated lignite humic acid product.
Further, the application also provides a preparation method of the sulfonated lignite humic acid product, which comprises the following steps:
(1) crushing lignite into fine particles by using a crusher; (2) optionally, adding the fine particles into an oxidant solution for oxidation; (3) adding the obtained mixture/fine particles into NaOH aqueous solution, and stirring; (4) centrifuging to remove solids, filtering, and adding concentrated HCI into the obtained filtrate with stirring to adjust pH until a large amount of black precipitate is separated out; (5) filtering and drying the precipitated precipitate to obtain lignite humic acid; (6) dissolving humic acid of lignite in water, adding H2SO4And/or K2SO3Reacting; (7) and drying the solution to obtain a sulfonated lignite humic acid product.
Further, step (2) of adding the fine particles to 0.6 times by mass of 20% H2O2The solution was stirred at 50 ℃ for 30 minutes.
Further, in step (3), the resultant mixture was added to 1.5 times by mass of a 1.5% aqueous solution of KOH, and stirring was continued at 60 ℃ for 30 minutes.
Further, in the step (6), the lignite humic acid is dissolved in water with the mass being 10 times that of the lignite humic acid, and the reaction is carried out for 2 hours at the temperature of 50 ℃.
Further, 0.5% by mass of H was used in the step (6)2SO4And/or 4% by mass of K2SO3。
Further, 0.5% by mass of H was used in the step (6)2SO4And 4% by mass of K2SO3。
In another aspect, the present application provides a method of preparing a water-soluble fertilizer, the method comprising the steps of:
(1) crushing lignite into fine particles by using a crusher;
(2) optionally, adding the fine particles into an oxidant solution for oxidation;
(3) adding the obtained mixture/fine particles into NaOH aqueous solution, and stirring;
(4) centrifuging to remove solids, filtering, and adding concentrated HCI into the obtained filtrate with stirring to adjust pH until a large amount of black precipitate is separated out;
(5) filtering and drying the precipitated precipitate to obtain lignite humic acid;
(6) dissolving humic acid of lignite in water, adding H2SO4And/or K2SO3Reacting;
(7) drying the solution to obtain a sulfonated lignite humic acid product;
(8) grinding the sulfonated lignite humic acid product prepared in the step (7), adding phosphoric diamine, calcium superphosphate, borax, sodium sulfate,
And mixing and stirring carbamide, magnesium sulfate, potassium sulfate and zinc sulfate to obtain the water-soluble fertilizer.
On the other hand, the application provides the application of the water-soluble fertilizer in the planting of the hickory, and the application is used for inhibiting the occurrence of dry rot disease spots of the hickory, accelerating the rapid scab healing of the existing disease spots and inhibiting the occurrence of root rot.
Further, the air conditioner is provided with a fan,the water soluble fertilizer is applied 2 times in the germination period and the initial fruiting period before Qingming, and the application amount is 14kg/667m2And pouring liquid with the concentration of 160 times.
The lignite can be produced in various production places, and the indexes of humic acid, water and carbon content of the lignite can be different as long as the lignite conforms to the general definition of the lignite in the industry.
Agents of the invention, e.g. sulfonating agent H2SO4、K2SO3Qualified products of various purities can be selected according to conditions, and are not limited to individual brands or standards.
The fertilizer in the invention comprises fertilizers of various application modes, wherein the fertilizer can contain known fertilizer components which do not conflict with the sulfonated lignite humic acid, including but not limited to trace elements, other organic fertilizers and the like.
The hickory nut in the present invention includes various varieties of the genus hickory of the family juglandaceae, including but not limited to varieties derived from america and native to china.
According to the humic acid water-soluble fertilizer efficiency test, the cast-in-place humic acid test fertilizer can improve the immunity of the hickory nut, inhibit the occurrence of disease spots of hickory nut dry rot, and enable existing disease spots to quickly scar and heal; inhibiting the occurrence of root rot and promoting the growth of root systems; the seed setting rate is improved; the seed-shriveling rate is reduced (from 25% to 11%); the leaf color is dark green, and the leaves are large and thick; the drought resistance is strong, and the diseases are obviously reduced; the fruit size is uniform, and the commodity is excellent.
Drawings
FIG. 1 is a chart illustrating the effect of dry rot after the application of water-soluble fertilizer.
Detailed Description
The main raw materials and reagents used in the examples are as follows:
lignite sample: purchased from enterprises under the Jinzao coal group, and the production place is Shanxi Lingqiu (the experimental batch is detected to contain 45.5 percent of total humic acid, 25.4 percent of water and 22.1 percent of fixed carbon);
sulfonating agent K2SO3And H2SO4Produced by the chemical reagent factory of Xian;
surface tension meter: germany Sita SITA t-100 surface tension meter;
the rest reagents and instruments are all conventional domestic models and types
Only a portion of representative results are shown in the examples and a number of methodological/performance-analogous experiments are not shown.
Example 1 basic Performance test method
And (3) measuring the sulfonation degree:
weighing by an analytical balance, heating and dissolving to accurately prepare a CTAB solution of 0.001M;
weighing 0.2g of sulfonated humic acid sample, adding the sulfonated humic acid sample into 500mL of distilled water, swelling for 12 hours, and fixing the volume to 1L;
diluting 10mL of sulfonated humic acid sample solution with 30mL of distilled water, and titrating by using a 0.001M CTAB solution;
measuring the conductivity in the titration by using a conductivity meter until the conductivity is terminated when a volume curve of the CTAB solution is obviously bent;
and calculating the sulfonation degree of 103CV/m multiplied by 100 percent, C is CTAB concentration (mol/L), V is the volume (L) of turning point CTAB, and m is the mass (g) of the lignite sulfonated humic acid.
Surface tension measurement
1% (w/v) of humic acid/sulfonated humic acid was prepared accurately and measured using a SITA t-100 surface tension meter.
Suspended matter determination
Adding 1g of dried humic acid/sulfonated humic acid into 50mL of distilled water, stirring for 10 minutes, and standing for 10 minutes;
centrifuging, and drying the precipitate in a drying oven for 1 hour;
weighing the mass of the dried precipitate;
the suspension percentage was calculated to be 1 g-mass of precipitate after drying (g)/1g × 100%
Example 2 preparation of potassium humate from lignite
Crushing the lignite into fine particles with the particle size of below 15 meshes by using a crusher;
adding fine particles to 0.6 times the mass of 20% H2O2Stirring the solution for 30 minutes at 50 ℃;
adding the obtained mixture into 1.5 times of KOH aqueous solution with the mass of 1.5%, and continuously stirring for 30 minutes at the temperature of 60 ℃;
centrifuging to remove solids, filtering, and adding concentrated HCI into the obtained filtrate with stirring to adjust pH until a large amount of black precipitate is separated out;
and filtering and drying the separated precipitate to obtain a filter cake, namely the potassium humate of lignite.
Further, upon verification by the applicant, H2O2Oxidation is not an essential step, removal of which reduces the yield by about 10%; in practice, this step may be omitted depending on the composition of the starting materials, or other known oxidation methods, such as nitric acid oxidation, may be used instead as necessary.
Example 3 preparation of sulfonated lignite potassium humate
Dissolving potassium humate of lignite in 10 times of water by mass, and adding 1% of H by mass2SO4And 4% by mass of K2SO3Reacting for 2 hours at 50 ℃;
and drying the solution to obtain a sulfonated lignite potassium humate product (1).
Use 8% H2SO4And (3) sulfonating under similar conditions to obtain a sulfonated potassium montanate product (2).
Using 5% K2SO3And (3) sulfonating under similar conditions to obtain a sulfonated potassium montanate product (3).
Use of 3% H2SO4And 3% of K2SO3And (4) sulfonating under similar conditions to obtain a sulfonated potassium montanate product (4).
Example 4 sulfonated lignite potassium humate Performance test results
Sulfonation degree test results:
| product(s) | Product (1) | Product (2) | Product (3) | Product (4) |
| Degree of sulfonation (%) | 18.88 | 18.59 | 6.91 | 10.22 |
Surface tension test results
| Product(s) | Product (1) | Product (2) | Product (3) | Product (4) |
| Surface tension mN/m | 50.74 | 52.36 | 65.56 | 70.21 |
Results of suspension test
In addition, the product (4) is supplemented with 5% of lignosulfonate as a dispersant, and the result shows that the suspension performance of the product reaches only 90.4%, and the introduction of the lignosulfonate not only increases the cost, but also has potential damage to soil or plants.
Using 1% by mass of H2SO4And 4% by mass of K2SO3The sulfonation effect is optimal, although the sulfonation degree, the surface tension and the suspension performance are slightly over 8 percent of sulfuric acid, the alkalization step (or the time/alkali addition amount used in the alkalization step) in the preparation of the fertilizer by using the sulfuric acid sulfonation product is omitted, and the problems of local dehydration and the like in the sulfuric acid sulfonation are avoided. The product has good water solubility/dispersibility and is suitable for preparing water-soluble fertilizers. The potassium ion content of the product is high, and the product is suitable for the common situation of Chinese hickory planting areas.
Example 5
The water-soluble fertilizer comprises humic acid and inorganic compound fertilizer, and the humic acid product of the sulfonated lignite accounts for 50 percent by weight; the inorganic compound fertilizer comprises the following components:
grinding the sulfonated lignite humic acid product (1), adding phosphoric diamine, calcium superphosphate, borax, carbamide, magnesium sulfate, potassium sulfate and zinc sulfate according to the formula, and mixing and stirring to obtain the water-soluble fertilizer.
Example 6
The water-soluble fertilizer comprises humic acid and inorganic compound fertilizer, and the humic acid product of the sulfonated lignite accounts for 50 percent by weight; the inorganic compound fertilizer comprises the following components:
grinding the sulfonated lignite humic acid product (3), adding phosphoric diamine, calcium superphosphate, borax, carbamide, magnesium sulfate, potassium sulfate and zinc sulfate according to the formula, and mixing and stirring to obtain the water-soluble fertilizer.
Example 6 practical Effect of humic acid containing sulfonated lignite for Carya cathayensis
The partial research is carried out by the institute of environmental resources and soil fertilizers of agricultural science institute of Zhejiang province, and the following data are provided by the institute except for product number.
1.1 test site and test crop, variety
The test sites are set in Wangliping peasant of Bingzhen village of Ginkgo of Cool mountain town in Linan city of Zhejiang province and Yangjun peasant of Yanggu village of Yangguo city of south Pole county of Ningguo city of Anhui province. The test variety is hickory.
1.2 basic conditions of the test
The southern foot of Tianmu mountain at the northwest of Zhejiang province and the northern foot of Tianmu mountain at the southeast of Anhui province at the test point belong to the semitropical monsoon area of China and subtropical province, and are warm and humid, clear in four seasons, abundant in rainfall, excellent in climate environment, and strong in production technology capability, and the hickory industry develops for many years. The soil to be tested is gravelly loam and soil clay, the soil nutrient content is similar, and the fertility level difference is small. The soil physical and chemical properties of each test point are as follows:
1.3 design of test treatment
The test was conducted with two treatments, respectively:
treatment 1: and (2) conventionally applying fertilizers (60 kg of compound fertilizer (15-15-15) in Bombay fields per mu, the compound fertilizer is produced by Shenzhen ecological engineering Co., Ltd. the fertilizer dosage is 40% of base fertilizer and 60% of 2 times of topdressing), and applying the water-soluble fertilizer of the embodiment 6 for 2 times in the germination period before clearness and in the early stage of fruiting, wherein the total dosage is 14kg/667 square meter, and the application concentration is 160 times of liquid.
And (3) treatment 2: and (2) conventionally applying fertilizers (60 kg of compound fertilizer (15-15-15) in Bombay fields per mu, the compound fertilizer is produced by Shenzhen ecological engineering Co., Ltd. the fertilizer dosage is 40% of base fertilizer and 60% of 2 times of topdressing), and applying the water-soluble fertilizer of the embodiment 5 for 2 times in the germination period before clearness and in the early stage of fruiting, wherein the total dosage is 14kg/667 square meter, and the application concentration is 160 times of liquid.
Each test is repeated for 3 times, the area of each cell is 335 square meters (12-14 years old, 10 plants), the cells are randomly arranged, and protection rows are arranged.
1.4 test application time:
the Bingzhen ginkgo village with cool peaks in Linan city: the tree ages are 12-14 years, the base fertilizer is applied in 2016, 10 and 18 months, and the additional fertilizer (conventional fertilizer and experimental fertilizer) is applied in the last 4 and 6 months in 2017. The method is picked in 9 months and 20 days, and the harvest is finished in 10 months and 8 days, so that no serious natural disasters occur in the whole test process.
Ningguo city, Antarctic county Yongning village: the tree ages are 12-14 years, the base fertilizer is applied in 2016, 10 and 20 days, and the additional fertilizer (conventional fertilizer and experimental fertilizer) is applied in the last 4 and 6 months in 2017. The method is picked in 9 months and 22 days, the harvest is finished in 10 months and 15 days, and no serious natural disasters occur in the test process.
2.1 statistics of yield
TABLE 1 influence of humic acid water-soluble fertilizer on hickory nut yield traits
Performing significance analysis by adopting DPS statistical analysis software, wherein the P value of the temporary market point is 0.006 and less than 0.05, which indicates that the significance level is reached; the P value of the Yongning village point of the south Pole county in Ningguo city is 0.0008 and is less than 0.05, which indicates that the significant level is reached.
The critical point statistical analysis is as follows:
the Ningguo point statistical analysis is as follows:
in addition, the incidence of dry rot in hickory plants using both sulfonated humic acid products was lower compared to plants not applied with potassium humate.
Example 7 Effect of Water-soluble fertilizers of the present application (example 5) on factors such as growth and disease resistance of Carya cathayensis
1. Influence on growth potential of hickory
Tests show that the growth potential of the hickory nut is obviously different when the water-soluble fertilizer is applied and when the water-soluble fertilizer is not applied. The pecan trees using the water-soluble fertilizer have strong growth potential, dark green leaves, thick and glossy leaves, and the leaves of the pecan which are not used are light green, and have no luster which is obviously compared with the leaves which are used.
2. Influence on the yield and quality of hickory
After the water-soluble fertilizer is used, the pecan grows better, and the flowering and fruiting are good, and the yield is high. The Wangliping flat family in 350 mu of production base in two years obtains high yield every year. 6.35 ten thousand jin in 2016 years; 6.62 jin in 2017 (a small year), which is increased by 4.3% compared with 2016 (a big year), and 12-13 jin in 2018 (a big year), which is expected to be increased by about 50% compared with 2016 (a big year). The empty seed rate of the pecan is also reduced after the water-soluble fertilizer is used, 320 jin of wet materials are detected in 370 jin in 2017, while 50 jin of wet materials are detected, the empty seed rate is 13.5%, while the empty seed rate reaches 17.2% after the water-soluble fertilizer is not used, 240 jin of wet materials are detected, 50 jin of empty seeds are detected, and the percentage of the used water-soluble fertilizer is reduced by 3.7% compared with the unused water-soluble fertilizer; the plumpness of the water-soluble fertilizer pecan particles is determined, 2 jin of kernels are added for every 100 jin of pecan dry seeds, and the plumpness is improved by about 2 percent.
3. The effect on the pH of the soil.
The test plants are in slightly alkaline forest lands, and the original pH values are all 6.0. After the soil wobbe is used for two years, the pH value of 5 test trees is averagely 6.3 and reaches 6.5-6.6 at most, the change is not great as before the test, but the pH value is obviously improved after the water-soluble fertilizer is used in forest lands with serious root rot.
4. Effect on control of rot
Marking the position of the test tree with the trunk height of 1.5 meters, and checking the number of new disease spots and the number of relapse of old disease spots in the current year in the range below 1.5 meters to examine the influence of the water-soluble fertilizer on the hickory nut dry rot. The trunk rot of the tree bodies of 35 g of test groups is not serious and representative, only 1 tree of 350 g of test groups is less representative, and two groups are not examined for effects, and 200 g is taken as a standard. The number of new scabs of 5 test trees in the current year before the test of the test group is averagely 9.6, and the number of old scabs is averagely 16. After the test, the average number of new scabs of 5 test trees in 2017 is 8.6, and the recurrence number of old scabs is 15.2; in 2018, the number of new scabs of 5 test trees is 3.6 on average, and the number of relapse of old scabs is 34.4. There was no significant difference between the pre-and post-test comparisons (FIG. 1).
In summary, the water-soluble fertilizer of the present application has the following effects.
1. The use of the water-soluble fertilizer is beneficial to enhancing the growth potential of the hickory, and the output and the quality of the hickory are improved.
2. The difference of the control effect of the water-soluble fertilizer on the dry rot of the hickory nut is not obvious when the water-soluble fertilizer is used, the direct control effect is not realized, the soil is improved, the growth potential of the hickory nut is good, the self disease resistance of the hickory nut is naturally improved, and new disease spots are reduced year by year.
3. The use of the water-soluble fertilizer and the non-use of the fertilizer have influence on the fallen leaves of the hickory. The use of the water-soluble fertilizer can prolong the leaf falling time, the natural dormancy of the fallen leaves is generally 10 months, while the use of the water-soluble fertilizer can prolong the 10-15 days of 11 months, which is about 10-15 days longer than the use of the water-soluble fertilizer.
4. After the water-soluble fertilizer is used, the growth heat of the hickory trees is obviously improved, the generated effect has influenced surrounding farmers, and forest farmers of many households are actively appreciating and applying the fertilizer.
Attached: survey table for influence condition of water-soluble fertilizer on dry rot
Claims (10)
1. A humic acid water-soluble fertilizer suitable for pecan planting comprises 40-65% of humic acid and an inorganic compound fertilizer by weight percent; the inorganic compound fertilizer comprises the following components:
total nitrogen 10-25%
P2O52.0-5.0%
K2O 2.0-5.0%
Calcium 1.0-5.0%
0.5 to 1.0 percent of zinc
0.5 to 1.0 percent of magnesium
0.5 to 1.0 percent of boron;
the total nitrogen and P2O5、K2The humic acid is a sulfonated lignite humic acid product.
2. The humic acid water-soluble fertilizer suitable for pecan planting according to claim 1, wherein the humic acid is 45-60% by weight; the inorganic compound fertilizer comprises the following components:
total nitrogen 15-20%
P2O54.0-5.0%
K2O 3.0-5.0%
2.0 to 4.0 percent of calcium
0.5 to 1.0 percent of zinc
0.5 to 1.0 percent of magnesium
0.5 to 1.0 percent of boron;
the total nitrogen and P2O5、K2The humic acid is a sulfonated lignite humic acid product.
3. The humic acid water-soluble fertilizer applicable to pecan planting according to claim 1 or 2, wherein the preparation method of the sulfonated lignite humic acid product comprises the following steps:
(1) crushing lignite into fine particles by using a crusher;
(2) optionally, adding the fine particles into an oxidant solution for oxidation;
(3) adding the obtained mixture/fine particles into NaOH aqueous solution, and stirring;
(4) centrifuging to remove solids, filtering, and adding concentrated HCI into the obtained filtrate with stirring to adjust pH until a large amount of black precipitate is separated out;
(5) filtering and drying the precipitated precipitate to obtain lignite humic acid;
(6) dissolving humic acid of lignite in water, adding H2SO4And/or K2SO3Reacting;
(7) and drying the solution to obtain a sulfonated lignite humic acid product.
4. The humic acid water-soluble fertilizer applicable to pecan planting according to claim 3, wherein the fine particles added in the step (2) are 0.6 times of 20% H by mass2O2The solution was stirred at 50 ℃ for 30 minutes.
5. The humic acid water-soluble fertilizer applicable to pecan planting according to claim 3 or 4, wherein the mixture obtained in step (3) is added into 1.5 times of KOH aqueous solution with the mass of 1.5%, and the mixture is continuously stirred for 30 minutes at 60 ℃.
6. A humic acid water-soluble fertilizer suitable for hickory nut planting according to any one of claims 3 to 5 wherein in step (6) lignite humic acid is dissolved in 10 times the mass of water and reacted at 50 ℃ for 2 hours.
7. The humic acid water-soluble fertilizer applicable to pecan planting according to claim 6, wherein 0.5% by mass of H is used in step (6)2SO4And/or 4% by mass of K2SO3。
8. The humic acid water-soluble fertilizer applicable to pecan planting according to claim 7, wherein 0.5% by mass of H is used in the step (6)2SO4And 4% by mass of K2SO3。
9. A method of producing a water-soluble fertilizer as claimed in any one of claims 1 to 8, the method comprising the steps of:
(1) crushing lignite into fine particles by using a crusher;
(2) optionally, adding the fine particles into an oxidant solution for oxidation;
(3) adding the obtained mixture/fine particles into NaOH aqueous solution, and stirring;
(4) centrifuging to remove solids, filtering, and adding concentrated HCI into the obtained filtrate with stirring to adjust pH until a large amount of black precipitate is separated out;
(5) filtering and drying the precipitated precipitate to obtain lignite humic acid;
(6) dissolving humic acid of lignite in water, adding H2SO4And/or K2SO3Reacting;
(7) drying the solution to obtain a sulfonated lignite humic acid product;
(8) and (4) grinding the sulfonated lignite humic acid product prepared in the step (7), adding phosphoric acid diamine, calcium superphosphate, borax, carbamide, magnesium sulfate, potassium sulfate and zinc sulfate, mixing and stirring to obtain the water-soluble fertilizer.
10. The use of the water-soluble fertilizer according to any one of claims 1-8 in hickory planting for inhibiting the occurrence of dry rot spots of hickory and accelerating the rapid scar healing of existing spots and inhibiting the occurrence of root rot.
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| CN111217651A (en) * | 2020-02-13 | 2020-06-02 | 浙江丰瑜生态科技股份有限公司 | Humic acid-containing water-soluble fertilizer suitable for grapes and preparation method and use method thereof |
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Cited By (2)
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| CN111217651A (en) * | 2020-02-13 | 2020-06-02 | 浙江丰瑜生态科技股份有限公司 | Humic acid-containing water-soluble fertilizer suitable for grapes and preparation method and use method thereof |
| CN111217651B (en) * | 2020-02-13 | 2021-11-30 | 浙江丰瑜生态科技股份有限公司 | Humic acid-containing water-soluble fertilizer suitable for grapes and preparation method and use method thereof |
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