CN114988963B - Preparation and application of potassium polyphosphate microalgae diatom compound fertilizer with soil acidification reducing function - Google Patents
Preparation and application of potassium polyphosphate microalgae diatom compound fertilizer with soil acidification reducing function Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
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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
- C05G3/80—Soil conditioners
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- 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
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Abstract
The application discloses a poly (ethylene-propylene) with the function of reducing soil acidificationThe preparation method of the potassium polyphosphate microalgae diatom compound fertilizer comprises the following steps of: s1, adding a potassium hydroxide solution into a polymerization reaction kettle, S2, adding polyphosphoric acid, microalgae diatom complex liquid and molasses, and S3: to treat K in the product 2 The content of O is 33-35%, P 2 O 5 The content is 10 percent, and the reaction is finished; and S4, regulating the pH of the potassium polyphosphate to 9-9.5 to obtain the potassium polyphosphate microalgae diatom compound fertilizer. Such alkaline fertilizers themselves have the ability to neutralize the acidity of the soil; meanwhile, the polyphosphoric acid in the potassium polyphosphate microalgae diatom compound fertilizer has chelating capacity for metal ions; can form soluble complex with ineffective trace elements in soil to be absorbed by plants; the addition of the microalgae diatom compound liquid and the molasses enhances the buffer performance of the fertilizer, more effectively provides the capability of adjusting the pH value of soil, and further improves the quality and stability of the fertilizer.
Description
Technical Field
The application belongs to the technical field of fertilizers, and particularly relates to preparation and application of a potassium polyphosphate microalgae diatom compound fertilizer with a soil acidification reducing effect.
Background
The fertilizer is a substance which provides nutrient elements necessary for plants and can improve soil properties and increase soil fertility level, and is one of substance bases for agricultural production. The phosphorus and the potassium are a great amount of nutrient elements necessary for plant growth and development, the influence of the phosphorus and the potassium is inferior to that of nitrogen, and the phosphorus and the potassium in the soil cannot meet the requirements of crop yield in many cases because the phosphorus and the potassium in the soil are influenced by factors such as soil fertility, texture and the like, so that artificial phosphorus and potassium application is one of main effective ways for realizing crop yield increase.
On the other hand, the soil environment in which the growth of crops is affected by long-term application of chemical fertilizers is mainly represented by soil acidification and hardening. Soil acidification and heavy metal accumulation can seriously inhibit the propagation and survival of beneficial microorganism bacteria in soil, so that harmful bacteria are bred, root diseases are easy to occur, the spread of root nematode diseases is aggravated, the absorption and utilization of nutrient elements are inhibited, the fertilizer cost input is higher and higher, and the yield, quality and the like of crops are reduced.
The existing potassium polyphosphate fertilizer mainly focuses on the adjustment of nutritional ingredients and content, is not adjusted for the problem of soil acidification, cannot improve the soil acidification environment at the same time, and can influence the use effect of the potassium polyphosphate fertilizer.
Disclosure of Invention
The application aims to provide a preparation and application of a potassium polyphosphate microalgae diatom compound fertilizer with a soil acidification reducing effect, so that the defect that the existing potassium phosphate fertilizer cannot improve the soil acidification environment and influence the use effect is overcome.
In order to achieve the aim, the application provides a preparation method of a potassium polyphosphate microalgae diatom compound fertilizer with a soil acidification reducing effect, which comprises the following steps:
s1, adding potassium hydroxide solution with the mass fraction of more than 65% into a polymerization reaction kettle;
s2, slowly dripping 70-80% polyphosphoric acid into a potassium hydroxide solution while stirring, and simultaneously adding microalgae diatom complex liquid and molasses, wherein the reaction temperature is controlled between 25-46 ℃;
s3: detection of K in the product 2 O and P 2 O 5 In weight percent of K in the product 2 The content of O is 33-35%, P 2 O 5 The content is 10 percent, and the potassium polyphosphate is prepared after the reaction is finished;
s4, adjusting the pH of the potassium polyphosphate to 9-9.5 to obtain the potassium polyphosphate microalgae diatom compound fertilizer;
in the reactants, the volume ratio of the potassium hydroxide solution, the polyphosphoric acid, the microalgae diatom complex liquid and the molasses is as follows: 55-60:20-23:10-15:10-15, obtaining the potassium polyphosphate microalgae diatom complex.
Preferably, the volume ratio of the potassium hydroxide solution, the polyphosphoric acid, the microalgae diatom complex liquid and the molasses is as follows: 60:20:10:10.
diatom is widely distributed in the earth's water environment, and is one of the most "successful" planktonic photosynthetic organisms on the earth. The biomass carbon sequestration amount of photosynthesis exceeds one fifth of the global ecosystem and exceeds the total carbon sequestration amount of tropical rain forests. Diatom is also a representative aquatic organism which can ingest silicon to build own cell wall (the mineral component is A-type opal), so the vital activity and the returning trend of siliceous remains form the main links of the global silicon-carbon co-circulation.
Microalgae are autotrophic plants which are widely distributed on land and in the ocean and have rich nutrition and high photosynthetic availability. The microalgae is added in the polyphosphoric acid fertilizer, so that the capability of degrading heavy metals of the fertilizer can be improved, and meanwhile, the microalgae can absorb NOx, SOx and H with certain concentration 2 S, the pH value of the soil can be regulated together with diatom.
The microalgae diatom compound liquid and molasses are added into the reaction raw materials of the polyphosphoric acid fertilizer, and the reaction processes such as reaction temperature and the like are adjusted, so that the pH of the finally obtained polyphosphoric acid potassium microalgae diatom compound fertilizer is 9-9.5, the quality of the fertilizer is stable, the soil structure can be adjusted in the use process, the soil acidification degree is reduced, the absorption and the utilization of crops to the fertilizer are facilitated, and the fertilizer efficiency is further improved.
Preferably, in step S4, a 1% sodium tetraborate buffer solution is added to potassium polyphosphate to adjust the pH of potassium phosphate.
Preferably, in step S4, the pH of the potassium polyphosphate is adjusted to 9.3.
Preferably, in step S2, each milliliter of the microalgae-diatom composite solution contains more than 100 tens of thousands of microalgae and diatoms.
Preferably, in step S2, the preparation method of the microalgae diatom composite liquid comprises the following steps: inoculating microalgae mother liquor into clear water, introducing air to proliferate for 20-30 hours to obtain microalgae liquor, inoculating diatom mother liquor into clear water, introducing air to proliferate for 40-60 hours to obtain diatom liquor, and mixing the microalgae liquor and the diatom liquor to obtain the microalgae diatom composite liquor.
Preferably, in step S2, the brix of the molasses is 45 degrees.
Preferably, in the step S2, the reaction time is 130-190 minutes, and the potassium polyphosphate microalgae diatom complex is obtained.
Another technical scheme of the application is as follows: the application of the potassium polyphosphate microalgae diatom compound fertilizer in red soil areas.
Preferably, the dosage of the potassium polyphosphate is 30-50 liters/mu.
Further, the potassium polyphosphate is mixed with an organic fertilizer and then applied as a base fertilizer.
Compared with the prior art, the application has the following beneficial effects:
1. the polyphosphoric acid in the potassium polyphosphate microalgae diatom compound fertilizer has chelating ability to metal ions; can form soluble complex with ineffective trace elements in soil to be absorbed by plants; meanwhile, the chelation of the polyphosphate can prevent metal impurities in the suspension fertilizer from forming precipitation, so that the quality of the fertilizer is stable.
2. The application is characterized in thatThe microalgae and diatom compound liquid and molasses are added into the potassium polyphosphate microalgae and diatom compound fertilizer, wherein diatom is widely distributed in the earth water environment and is one of the most successful plankton photosynthetic organisms on the earth. The biomass carbon sequestration amount of photosynthesis exceeds one fifth of the global ecosystem and exceeds the total carbon sequestration amount of tropical rain forests. Diatom is also a representative aquatic organism which can ingest silicon to build own cell wall (the mineral component is A-type opal), so the vital activity and the returning trend of siliceous remains form the main links of the global silicon-carbon co-circulation. The microalgae diatom compound liquid is added in the polyphosphoric acid fertilizer, so that the capability of degrading heavy metals of the fertilizer can be improved, and meanwhile, the microalgae can absorb NOx, SOx and H with certain concentration 2 S, the pH value of the soil can be regulated together with diatom. The molasses is added to provide nutrition for microalgae and diatom, is beneficial to propagation of microalgae and diatom, can form a package, is beneficial to composite synergism of microalgae and diatom and potassium polyphosphate, prolongs fertilizer efficiency, and is beneficial to regulating pH value of soil.
3. Tests show that the soil acid neutralization agent has the capability of neutralizing soil acid; meanwhile, the polyphosphoric acid in the potassium polyphosphate microalgae diatom compound fertilizer has chelating capacity for metal ions; can form soluble complex with ineffective trace elements in soil to be absorbed by plants; the addition of the microalgae diatom compound liquid and the molasses enhances the buffer performance of the fertilizer, can more effectively provide the pH value adjusting capability of the fertilizer, and further improves the quality and stability of the fertilizer. The potassium polyphosphate microalgae diatom compound fertilizer provided by the application is applied to crops in acid soil cultivation areas and soil acidification areas, and has the effects of increasing yield and income.
Detailed Description
The following detailed description of specific embodiments of the application is, but it should be understood that the application is not limited to specific embodiments.
Example 1
The vegetable garden field is experimentally located in the West county area of Guangxi nan Ning, and the planted crop is water spinach. Soil pH 4.5 prior to testing. In the embodiment, the potassium polyphosphate microalgae diatom compound fertilizer is applied, and the rest is planted according to a conventional method. Meanwhile, in contrast to potassium dihydrogen phosphate, the potassium dihydrogen phosphate is obtained from commercial sources.
The preparation method of the potassium polyphosphate microalgae diatom compound fertilizer applied in the embodiment comprises the following steps:
s1, adding 65% potassium hydroxide solution in a polymerization reaction kettle;
s2, slowly dripping 80% polyphosphoric acid into the potassium hydroxide solution while stirring, and simultaneously adding the microalgae diatom composite liquid and molasses, wherein the reaction temperature is controlled between 25 ℃ and 46 ℃ and the reaction time is 130-190 minutes, so as to obtain the polyphosphoric acid fertilizer.
In the reactants, the volume ratio of the potassium hydroxide solution, the polyphosphoric acid, the microalgae diatom complex liquid and the molasses is as follows: 60:20:10:10.
the preparation method of the microalgae diatom composite liquid comprises the following steps: inoculating microalgae mother liquor into clear water, introducing air into the clear water, and proliferating for 24 hours to obtain microalgae liquor; inoculating the diatom mother liquor into clear water, introducing air into the clear water, and proliferating for 48 hours to obtain diatom liquor; mixing the microalgae solution with the diatom solution to obtain the microalgae diatom composite solution. The microalgae and diatom composite liquid contains more than 100 thousands of microalgae and more than 100 thousands of diatoms per milliliter.
Preferably, the molasses has a brix of 45 degrees.
S3: detection of K in the product 2 O and P 2 O 5 In weight percent of K in the product 2 The content of O is 33-35%, P 2 O 5 The content is 10 percent, and the potassium polyphosphate is prepared after the reaction is finished;
and S4, adding a 1% sodium tetraborate buffer solution into the potassium polyphosphate, and adjusting the pH of the potassium polyphosphate to 9.3 to obtain the potassium polyphosphate microalgae diatom compound fertilizer.
The treatment of applying the potassium polyphosphate with the effect of reducing the soil acidification and the treatment of applying the potassium dihydrogen phosphate are equivalent phosphorus potassium, namely 18 kg of potassium polyphosphate with the effect of reducing the soil acidification is applied per mu, and 21 kg of nitrogen (N) is applied per mu. The specific effects are shown in Table 1.
Table 1 comparative Table of effects of planting Water spinach with different fertilizers of example 1
As can be seen from the comparison of the data in the table, the yield of the water spinach is increased by 2363 kg/mu by applying the potassium polyphosphate microalgae diatom compound fertilizer with the effect of reducing the soil acidification and the potassium dihydrogen phosphate with the same phosphorus and potassium amount, and the yield is increased by 106.5% by applying the potassium polyphosphate water spinach with the effect of reducing the soil acidification. Before the test, the pH value of the soil is 4.5, and the pH value of the potassium polyphosphate microalgae diatom compound fertilizer with the effect of reducing the soil acidification produced by the method is 6.1 when the soil is applied for three years continuously, so that the effect of reducing the soil acidification is remarkable.
Example 2
The test was located at sugarcane planting sites in the Guangxi nan Ning, longan Ancounty. Soil ph4.2 prior to testing. In the embodiment, the potassium polyphosphate microalgae diatom compound fertilizer is applied, and the rest is planted according to a conventional method. Meanwhile, the method is compared with a potassium polyphosphate microalgae diatom compound fertilizer without adding microalgae diatom compound liquid and molasses.
The preparation method of the potassium polyphosphate microalgae diatom compound fertilizer applied in the embodiment comprises the following steps:
s1, adding potassium hydroxide solution with the mass fraction of more than 65% into a polymerization reaction kettle;
s2, slowly dripping 70% polyphosphoric acid into the potassium hydroxide solution while stirring, and simultaneously adding the microalgae diatom composite liquid and molasses, wherein the reaction temperature is controlled between 25 ℃ and 46 ℃ and the reaction time is 130-190 minutes, so as to obtain the potassium polyphosphate fertilizer.
In the reactants, the volume ratio of the potassium hydroxide solution, the polyphosphoric acid, the microalgae diatom complex liquid and the molasses is as follows: 60:23:12:12.
the preparation method of the microalgae diatom composite liquid comprises the following steps: inoculating microalgae mother liquor into clear water, introducing air to proliferate for 24 hours to obtain microalgae liquor, inoculating diatom mother liquor into clear water, introducing air to proliferate for 48 hours to obtain diatom liquor, and mixing the microalgae liquor and the diatom liquor to obtain the microalgae diatom composite liquor. The microalgae and diatom contained in each milliliter of microalgae and diatom compound liquid are respectively more than 100 ten thousand.
Preferably, the molasses has a brix of 45 degrees.
S3: detection of K in the product 2 O and P 2 O 5 In weight percent of K in the product 2 The content of O is 33-35%, P 2 O 5 The content is 10 percent, and the potassium polyphosphate is prepared after the reaction is finished;
and S4, adding a 1% sodium tetraborate buffer solution into the potassium polyphosphate, and adjusting the pH of the potassium polyphosphate to 9.3 to obtain the potassium polyphosphate microalgae diatom compound fertilizer.
The preparation method of the potassium polyphosphate fertilizer without adding microalgae diatom complex liquid and molasses for the control group comprises the following steps:
(1) Adding potassium hydroxide solution with the mass fraction of more than 65% into a polymerization reaction kettle,
(2) Slowly dripping 70-80% polyphosphoric acid into potassium hydroxide solution, stirring while dripping, controlling the reaction temperature between 25-46 ℃,
(3) Detection of K in the product 2 O and P 2 O 5 In weight percent of K in the product 2 The content of O is 33-35%, P 2 O 5 The content is 10%, and the reaction is finished to prepare the potassium polyphosphate fertilizer without adding microalgae diatom complex liquid and molasses.
The treatment of applying the potassium polyphosphate microalgae diatom compound fertilizer with the effect of reducing soil acidification and the treatment of applying the potassium polyphosphate fertilizer without adding the microalgae diatom compound liquid and molasses are equal amounts of phosphorus and potassium, namely 20 kg of the potassium polyphosphate microalgae diatom compound fertilizer applied per mu or the potassium polyphosphate fertilizer without adding the microalgae diatom compound liquid and molasses and 20 kg of nitrogen (N) applied per mu. The effect of planting sugarcane in example 2, which was performed in a conventional manner, is shown in Table 2.
Table 2 example 2 comparison of effects of different fertilizers on sugarcane planting
As can be seen from the comparison of the data in the table, the yield of the sugarcane with the potassium polyphosphate with the soil acidification reduction effect is increased by 1909 kg/mu compared with that of the sugarcane with the control potassium polyphosphate by 47.9% when the sugarcane with the potassium polyphosphate with the soil acidification reduction effect is compared with that of the control potassium polyphosphate without the microalgae diatom compound solution and molasses. Before the test, the pH value of the soil is 4.2, and the pH value of the potassium polyphosphate microalgae diatom compound fertilizer with the effect of reducing the soil acidification produced by the method is 5.9 when the soil is applied for three years continuously, so that the effect of reducing the soil acidification is remarkable. The microalgae and diatom compound liquid and molasses are added into the potassium polyphosphate microalgae and diatom compound fertilizer, so that the heavy metal degradation capability of the fertilizer can be improved, and meanwhile, the microalgae and the diatom regulate the pH value of the soil together, so that the quality and stability of the fertilizer are further improved.
Example 3
And (3) an orchard which is experimentally positioned in Wuming region of Guangxi nan Ning, wherein the planted crops are citrus. Soil pH 4.1 prior to testing. In the embodiment, the potassium polyphosphate microalgae diatom compound fertilizer is applied, and the rest is planted according to a conventional method. Meanwhile, the method is compared with the potassium polyphosphate microalgae compound fertilizer with different pH values and without adding diatom.
The preparation method of the potassium polyphosphate microalgae diatom compound fertilizer applied in the embodiment comprises the following steps:
s1, adding potassium hydroxide solution with the mass fraction of more than 65% into a polymerization reaction kettle;
s2, slowly dripping 70-80% of polyphosphoric acid into the potassium hydroxide solution while stirring, and simultaneously adding the microalgae diatom composite liquid and molasses, wherein the reaction temperature is controlled between 25-46 ℃ and the reaction time is 130-190 minutes.
In the reactants, the volume ratio of the potassium hydroxide solution, the polyphosphoric acid, the microalgae diatom complex liquid and the molasses is as follows: 60:20:15:15.
the preparation method of the microalgae diatom composite liquid comprises the following steps: inoculating microalgae mother liquor into clear water, introducing oxygen into the clear water, and proliferating for 24 hours to obtain microalgae liquor; inoculating the diatom mother liquor into clear water, introducing oxygen into the clear water, and proliferating for 48 hours to obtain diatom liquor; mixing the microalgae solution with the diatom solution to obtain the microalgae diatom composite solution. The microalgae and diatom composite liquid contains more than 100 thousands of microalgae and more than 100 thousands of diatoms per milliliter.
The brix of the molasses was 45 degrees.
S3: detection of K in the product 2 O and P 2 O 5 In weight percent of K in the product 2 The content of O is 33-35%, P 2 O 5 The content is 10 percent, and the potassium polyphosphate is prepared after the reaction is finished;
and S4, adding a 1% sodium tetraborate buffer solution into the potassium polyphosphate, and adjusting the pH of the potassium polyphosphate to 9.5 to obtain the potassium polyphosphate microalgae diatom compound fertilizer.
The preparation method of the potassium polyphosphate microalgae compound fertilizer with different pH applied by the control group and without adding diatom is similar to the preparation method of the potassium polyphosphate with the effect of reducing soil acidification in the embodiment 3, and the difference is that: in the step S2, the microalgae diatom composite liquid is replaced by microalgae liquid (i.e. the fertilizer does not contain diatom), and the step S4 is not needed, i.e. the fertilizer is not added with sodium tetraborate buffer solution to adjust the pH value. The pH of the control fertilizer was 7.5.
The microalgae liquid contains more than 100 ten thousand microalgae per milliliter.
The treatment of applying the potassium polyphosphate microalgae diatom compound fertilizer with the effect of reducing the soil acidification and the treatment of applying the potassium polyphosphate microalgae compound fertilizer with different pH values and without adding diatoms are respectively equal amounts of phosphorus and potassium, namely 30 kg of the potassium polyphosphate microalgae diatom compound fertilizer with the effect of reducing the soil acidification or 30 kg of the potassium polyphosphate microalgae compound fertilizer without adding diatoms are applied to each mu, and 28 kg of nitrogen (N) is applied to each mu. The effect of example 3 on the planting of citrus fruit (4-age tree citrus orchard) was shown in Table 3 by conventional planting.
Table 3 example 4 comparison of effects of different fertilizers on citrus planting
As can be seen from the comparison of the data in the table, the citrus yield of the potassium polyphosphate and citrus with the soil acidification reduction effect is increased by 604 kg/mu and the yield is increased by 27.3% when the citrus is applied with the potassium polyphosphate and citrus with the soil acidification reduction effect and the potassium polyphosphate and microalgae compound fertilizer with different pH values and without diatom is compared with the citrus with the potassium polyphosphate and microalgae compound fertilizer with different pH values and without diatom. Before the test, the pH value of the soil is 4.1, and the pH value of the soil of the potassium polyphosphate microalgae compound fertilizer with the effect of reducing the soil acidification is 6.0 when the method is applied for three years continuously, so that the effect of reducing the soil acidification is obvious. Therefore, the alkaline fertilizer is beneficial to reducing the acidity of soil, and the diatom is added into the fertilizer, so that the soil heavy metal can be adsorbed, the soil acidity is regulated, and the diatom and microalgae together have a compound synergistic effect in reducing the pH of the soil.
Example 4
The test is located in Longan An county in Guangxi nan Ning, and the planted crop is sugarcane. Soil pH 4.1 prior to testing. In the embodiment, the potassium polyphosphate microalgae diatom compound fertilizer is applied, and the rest is planted according to a conventional method. Meanwhile, the method is compared with the method for applying the monopotassium phosphate and the diatomite-based silicon fertilizer.
The preparation method of the potassium polyphosphate microalgae diatom compound fertilizer applied in the embodiment comprises the following steps:
s1, adding potassium hydroxide solution with the mass fraction of more than 65% into a polymerization reaction kettle;
s2, slowly dripping 70-80% of polyphosphoric acid into the potassium hydroxide solution while stirring, and simultaneously adding the microalgae diatom composite liquid and molasses, wherein the reaction temperature is controlled between 25-46 ℃ and the reaction time is 130-190 minutes.
In the reactants, the volume ratio of the potassium hydroxide solution, the polyphosphoric acid, the microalgae diatom complex liquid and the molasses is as follows: 58:20:10:10.
the microalgae and diatom contained in each liter of microalgae and diatom compound liquid are respectively more than 100 ten thousand.
Preferably, the molasses has a brix of 45 degrees.
S3: detection of K in the product 2 O and P 2 O 5 In weight percent of K in the product 2 The content of O is 33-35%, P 2 O 5 The content is 10 percent, and the potassium polyphosphate is prepared after the reaction is finished;
and S4, adding a 1% sodium tetraborate buffer solution into the potassium polyphosphate, and adjusting the pH of the potassium polyphosphate to 9.2 to obtain the potassium polyphosphate microalgae diatom compound fertilizer.
The monopotassium phosphate and the diatomite-based silicon fertilizer applied by the control group are purchased and mixed for use respectively in the market. Wherein, the potassium dihydrogen phosphate and the potassium polyphosphate of the example 4 are equivalent phosphorus potassium, and the weight ratio of the diatomite-based silicon fertilizer to the potassium dihydrogen phosphate is the weight ratio of the polyphosphoric acid and the microalgae diatom complex liquid of the reference example 4.
The treatment of applying potassium polyphosphate with the effect of reducing soil acidification and applying potassium dihydrogen phosphate and diatom fertilizer is equivalent to that of phosphorus and potassium, namely 30 kg of potassium polyphosphate with the effect of reducing soil acidification is applied per mu, and 29 kg of nitrogen (N) is applied per mu. The effect of planting sugarcane in example 4, which was performed in a conventional manner, is shown in Table 4.
Table 4 example 4 comparison of effects of different fertilizers for sugarcane planting
As can be seen from the comparison of the data in the table, the citrus application of the potassium polyphosphate microalgae diatom compound fertilizer with the effect of reducing the soil acidification and the comparison of the same pH of the same amount of phosphorus and potassium but without adding the microalgae diatom compound solution and molasses, and the citrus application of the potassium polyphosphate with the effect of reducing the soil acidification has the yield increased by 1712 kg/mu compared with the yield of control sugarcane, and the yield increased by 40.9%. Before the test, the pH value of the soil is 4.1, and the pH value of the potassium polyphosphate microalgae diatom compound fertilizer with the effect of reducing the soil acidification produced by the method is 5.9 when the soil is applied for three years continuously, so that the effect of reducing the soil acidification is remarkable. Therefore, the diatomite has poorer effects than the diatomite microalgae compound liquid in the aspects of regulating the pH of soil, improving the crop yield and the like.
Example 5
The vegetable garden field is experimentally located in the West county area of Guangxi nan Ning, and the planted crop is water spinach. Soil pH 4.1 prior to testing. In the embodiment, the potassium polyphosphate microalgae diatom compound fertilizer and the organic fertilizer are applied, and the rest are planted according to a conventional method. Meanwhile, the method is compared with the method for applying monopotassium phosphate and organic fertilizer.
The preparation method of the potassium polyphosphate microalgae diatom compound fertilizer applied in the embodiment comprises the following steps:
s1, adding potassium hydroxide solution with the mass fraction of more than 65% into a polymerization reaction kettle;
s2, slowly dripping 70-80% of polyphosphoric acid into the potassium hydroxide solution while stirring, and simultaneously adding the microalgae diatom composite liquid and molasses, wherein the reaction temperature is controlled between 25-46 ℃ and the reaction time is 130-190 minutes, so as to obtain the potassium polyphosphate fertilizer.
In the reactants, the volume ratio of the potassium hydroxide solution, the polyphosphoric acid, the microalgae diatom complex liquid and the molasses is as follows: 56:22:10:12.
inoculating microalgae mother liquor into clear water, introducing air into the clear water, and proliferating for 24 hours to obtain microalgae liquor; inoculating the diatom mother liquor into clear water, introducing air into the clear water, and proliferating for 48 hours to obtain diatom liquor; mixing the microalgae solution with the diatom solution to obtain the microalgae diatom composite solution. The microalgae and diatom composite liquid contains more than 100 thousands of microalgae and more than 100 thousands of diatoms per milliliter.
Preferably, the molasses has a brix of 45 degrees.
S3: detection of K in the product 2 O and P 2 O 5 In weight percent of K in the product 2 The content of O is 33-35%, P 2 O 5 The content is 10 percent, and the potassium polyphosphate is prepared after the reaction is finished;
and S4, adding a 1% sodium tetraborate buffer solution into the potassium polyphosphate, and adjusting the pH of the potassium polyphosphate to 9.5 to obtain the potassium polyphosphate microalgae diatom compound fertilizer.
The treatment of applying potassium polyphosphate+organic fertilizer and potassium dihydrogen phosphate+organic fertilizer with soil acidification reducing effect is equivalent to that of phosphorus potassium, potassium dihydrogen phosphate and organic fertilizer (straw organic fertilizer) are purchased in the market, and mixed according to the weight ratio of 1:2, and the organic fertilizer prepared by the two fertilizers is equivalent. Namely 30 kg of potassium polyphosphate or potassium dihydrogen phosphate with the effect of reducing soil acidification is applied to each mu, and 60 kg of organic fertilizer is applied to each mu. The effect of planting the water spinach of example 5 according to the conventional method is shown in Table 5.
Table 5 example 5 comparison of effects of different fertilizers for planting Water spinach
As can be seen from the comparison of the data in the table, the yield of the water spinach by applying the potassium polyphosphate microalgae diatom compound fertilizer with the soil acidification reducing effect and the organic fertilizer with the same amount of phosphorus potassium is increased by 2501 kg/mu compared with the yield of the water spinach by applying the potassium polyphosphate with the organic fertilizer with the soil acidification reducing effect, and the yield is increased by 98.8%. Before the test, the pH value of the soil is 4.1, and the pH value of the potassium polyphosphate microalgae diatom compound fertilizer with the effect of reducing the soil acidification produced by the method is 6.1 when the soil is applied for three years continuously, so that the effect of reducing the soil acidification is remarkable. The potassium polyphosphate microalgae diatom compound fertilizer and the organic fertilizer are applied together, so that the synergistic effect is achieved.
In conclusion, the polyphosphoric acid in the potassium polyphosphate microalgae diatom compound fertilizer has chelating ability to metal ions; can form soluble complex with ineffective trace elements in soil to be absorbed by plants; meanwhile, the chelation of the polyphosphate can prevent metal impurities in the suspension fertilizer from forming precipitation, so that the quality of the fertilizer is stable. The microalgae diatom compound liquid is added in the polyphosphoric acid fertilizer, so that the capability of degrading heavy metals of the fertilizer can be improved, and meanwhile, the microalgae can absorb NOx, SOx and H with certain concentration 2 S, the pH value of the soil can be regulated together with diatom. The molasses is added to provide nutrition for microalgae and diatom, is beneficial to propagation of microalgae and diatom, can form a package, is beneficial to composite synergism of microalgae and diatom and potassium polyphosphate, prolongs fertilizer efficiency, and is beneficial to regulating pH value of soil. The potassium polyphosphate microalgae diatom compound fertilizer has the effect of reducing soil acidification, the quality of the fertilizer is improved, and the fertilizer has the effects of increasing yield and income when being applied to crops in acid soil cultivation areas and soil acidification areas.
The foregoing descriptions of specific exemplary embodiments of the present application are presented for purposes of illustration and description. It is not intended to limit the application 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 application and its practical application to thereby enable one skilled in the art to make and utilize the application in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the application be defined by the claims and their equivalents.
Claims (5)
1. The preparation method of the potassium polyphosphate microalgae diatom compound fertilizer with the effect of reducing soil acidification is characterized by comprising the following steps of:
s1, adding potassium hydroxide solution with the mass fraction of more than 65% into a polymerization reaction kettle;
s2, slowly dripping 70-80% polyphosphoric acid into a potassium hydroxide solution while stirring, and simultaneously adding microalgae diatom complex liquid and molasses, wherein the reaction temperature is controlled between 25-46 ℃;
the preparation method of the microalgae diatom composite liquid comprises the following steps: inoculating microalgae mother liquor into clear water, introducing air to proliferate for 20-30 hours to obtain microalgae liquor, inoculating diatom mother liquor into clear water, introducing air to proliferate for 40-60 hours to obtain diatom liquor, and mixing the microalgae liquor and the diatom liquor to obtain the microalgae diatom composite liquor;
each milliliter of microalgae and diatom composite liquid contains more than 100 tens of thousands of microalgae and diatom respectively;
s3: detection of K in the product 2 O and P 2 O 5 In weight percent of K in the product 2 The content of O is 33-35%, P 2 O 5 The content is 10 percent, and the potassium polyphosphate is prepared after the reaction is finished;
s4, adding 1% sodium tetraborate buffer solution into potassium polyphosphate, and adjusting the pH of the potassium polyphosphate to 9-9.5 to obtain the potassium polyphosphate microalgae diatom compound fertilizer;
in the reactants, the volume ratio of the potassium hydroxide solution, the polyphosphoric acid, the microalgae diatom complex liquid and the molasses is as follows: 55-60:20-23:10-15:10-15.
2. The method for preparing a potassium polyphosphate microalgae diatom compound fertilizer according to claim 1, wherein in the step S4, the pH of potassium polyphosphate is adjusted to 9.3.
3. The method for preparing a potassium polyphosphate microalgae diatom compound fertilizer according to claim 1, wherein in step S2, the brix of molasses is 45 degrees.
4. The method for preparing the potassium polyphosphate microalgae diatom compound fertilizer according to claim 1, wherein in the step S2, the reaction time is 130-190 minutes.
5. The use of the potassium polyphosphate microalgae diatom compound fertilizer according to any of claims 1 to 4 in red soil areas.
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| JPH0680490A (en) * | 1991-05-23 | 1994-03-22 | Ebara Res Co Ltd | Method for soil modification using soil algae |
| DE202005006625U1 (en) * | 2005-04-12 | 2005-08-18 | Tilco Biochemie Gmbh | Composition for controlling soil pH and increasing soil fertility comprises brown and/or red seaweed and an inorganic component |
| EP1712535A1 (en) * | 2005-04-12 | 2006-10-18 | Tilco Biochemie GmbH | Preparation for regulating the pH factor of the soil in combination with an improvement of soil fertility |
| EP1798212A2 (en) * | 2005-12-19 | 2007-06-20 | Tilco Biochemie GmbH | Soil conditioning and fertilizing formulation containing pyrophosphate |
| CN110868861A (en) * | 2017-05-10 | 2020-03-06 | 萨卡帕·瓦达卡库塔 | Agricultural compositions |
| CN111362747A (en) * | 2020-03-24 | 2020-07-03 | 高光林 | Hydrocarbon diatom photonuclear fertilizer and preparation method thereof |
| WO2022011298A1 (en) * | 2020-07-10 | 2022-01-13 | Heliae Development Llc | Microalgae and fertilizer mixtures and methods of use thereof to enhance plant characteristics |
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0680490A (en) * | 1991-05-23 | 1994-03-22 | Ebara Res Co Ltd | Method for soil modification using soil algae |
| DE202005006625U1 (en) * | 2005-04-12 | 2005-08-18 | Tilco Biochemie Gmbh | Composition for controlling soil pH and increasing soil fertility comprises brown and/or red seaweed and an inorganic component |
| EP1712535A1 (en) * | 2005-04-12 | 2006-10-18 | Tilco Biochemie GmbH | Preparation for regulating the pH factor of the soil in combination with an improvement of soil fertility |
| EP1798212A2 (en) * | 2005-12-19 | 2007-06-20 | Tilco Biochemie GmbH | Soil conditioning and fertilizing formulation containing pyrophosphate |
| CN110868861A (en) * | 2017-05-10 | 2020-03-06 | 萨卡帕·瓦达卡库塔 | Agricultural compositions |
| CN111362747A (en) * | 2020-03-24 | 2020-07-03 | 高光林 | Hydrocarbon diatom photonuclear fertilizer and preparation method thereof |
| WO2022011298A1 (en) * | 2020-07-10 | 2022-01-13 | Heliae Development Llc | Microalgae and fertilizer mixtures and methods of use thereof to enhance plant characteristics |
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