CN108774533B - Oyster shell soil conditioner, preparation method thereof and application thereof in shaddock planting - Google Patents
Oyster shell soil conditioner, preparation method thereof and application thereof in shaddock planting Download PDFInfo
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Abstract
The invention relates to an oyster shell soil conditioner, a preparation method thereof and application thereof in shaddock planting, wherein the oyster shell soil conditioner comprises step calcined oyster shells and organic matters, wherein the step calcined oyster shells account for 70-80% of the total weight, the oyster shell soil conditioner is applied to the soil in which shaddock is planted, the volume weight of the soil is reduced, and the pH value, available phosphorus, quick-acting potassium, total nitrogen, organic matters and carbon nitrogen ratio of the soil are improved.
Description
Technical Field
The invention relates to the technical field of soil improvement, in particular to an oyster shell soil conditioner, a preparation method thereof and application thereof in shaddock planting.
Background
The oyster cultivation amount in China is the first in the world. According to statistics, the yield of the oyster nationwide in 2016 reaches 483.50 ten thousand tons, and the oyster accounts for 81.50% of the total world yield. The oyster shells in coastal areas are rich in resources, and only an Anxian county in Zhangzhou city is taken as an example, 9.2 ten thousand tons of oyster are produced in the same year as the largest oyster hanging culture base in Fujian province, but more than 8 ten thousand tons of oyster shells are left, and once the oyster shells are not effectively treated, the oyster shells become solid waste and severely pollute the environment. At present, the oyster shell treatment mode still stays at the stage of pouring the oyster shell into the sea, which causes great pollution to the marine environment.
According to statistics, the area of acidified soil in China reaches 2 hundred million hectares, which is about 23% of the total area of China, and the acidified soil is mainly distributed in 14 provinces in the south of Yangtze river, wherein the proportion of soil with pH of <6.5 is increased from 52% to 65% before 30 years, the proportion of soil with pH of <5.5 is increased from 20% to 40%, and the proportion of soil with pH of <4.5 is increased from 1% to 4%. Soil acidification can lead to loss of nutrient elements in soil, increase of solubility of toxic heavy metal compounds, reduction of soil fertility, deterioration of soil structure, influence on growth and development of crops on the ground, and serious restriction on grain safety and sustainable development of agriculture in China. The large-scale grapefruit planting field in Pinghe county of Fujian province is the largest in China, and has serious soil acidification problem due to long-term unreasonable fertilization of farmers, meanwhile, the problems of soil hardening, leaf yellowing and the like are accompanied with the soil acidification problem, and even if the problems of soil hardening and yellowing cannot be solved by adopting the traditional soil fattening (such as using a nitrogen-potassium-containing compound fertilizer), the serious soil acidification is caused, so that the yield and quality of the grapefruits are influenced, and the problem of long-term puzzling of the farmers for planting the grapefruits is formed.
In the prior art, oyster shells can be used for improving soil, one is directly crushed and added into the soil, valuable elements in the oyster shells are utilized, but the plant absorption effect is poor, and the load of soil conditioning is increased by multiple applications, so that the oyster shells are generally used as ingredients, and the dosage in a soil conditioner is not large; the other is that the mixture is mixed into wet soil after calcination, the content of harmful elements is reduced by utilizing the adsorption effect, the problem of high calcination temperature and high energy consumption exists, and the method is fresh and useful for improving dry soil.
Disclosure of Invention
The invention aims to solve the problems of the prior art and provide an oyster shell soil conditioner, a preparation method thereof and application thereof in shaddock planting.
Based on the problems occurring in grapefruit planting, the problems in planting cannot be solved by adopting the traditional method for applying chemical fertilizers. Because the soil capacity is large, the distribution is wide, the soil difference is large, the fluidity is poor, and the absorption of the shaddock plants is not only selective, but also is greatly related to the comprehensive performance of the soil, so that the shaddock planting soil is difficult to obtain a good effect by correspondingly adding elements lacking according to the plants, and the comprehensive performance of the shaddock planting soil needs to be improved.
In the preparation method of the oyster shell soil conditioner, the step 1) of the step-type high-temperature calcination has the effects that the oyster shell is enabled to form a large number of micropore structures with uniform size distribution and pore size of about 5 mu m, the calcium oxide content of the oyster shell soil conditioner is obviously increased, the calcination time is short, the temperature is low, and the energy is saved. Preferably, the first calcination temperature is 450-530 ℃, and the second calcination temperature is 980-1030 ℃, so that the obtained micropore structure is more dense and has more micropores; more preferably, the first calcination temperature is 500 ℃, and the second calcination temperature is 1000 ℃, so that the obtained pore size and organic matter are better combined.
Step 3) mixing oyster shell and organic matter component, compared with the prior art, the function is that organic matter component is contained in oyster shell micropore structure, is difficult to run off, better plays the effect of improving soil fertility. 70-80 parts of oyster shell, 20-30 parts of organic matter components and 100 parts in total, so that the organic matter components can be maximally ensured to be contained in the microporous structure of the oyster shell while the soil fertility is improved. Organic components exceeding 30 parts may have excessive organic components, so that some organic components cannot be contained in the oyster shell microporous structure.
In the step 3), the superfine pulverizer is preferably adopted for pulverizing oyster shell and organic matter components, so that superfine powder with smaller particle size can be formed, the organic matter components are contained in the oyster shell microporous structure and are not easy to run off, the soil fertility is provided for a long time, and the technical defects of poor fertility effect and poor durability of the existing oyster shell soil conditioner are overcome.
In the step 4), the mixture is preferably input into a rotary drum granulator for steam granulation, the granules are dried by blowing hot air into a dryer after the grain size is 1-2mm, the dried granules are further subjected to steam granulation, and the granules are dried by blowing hot air into the dryer after the grain size is 4-5 mm.
The application amount of the oyster shell soil conditioner applied to the soil for planting the grapefruits is 2.5-7.5kg per grapefruit tree, the application amount is less than 2.5kg per plant, the soil improvement effect is not obvious, the fertilization amount is more than 7.5kg per plant, and the soil is excessively improved.
The specific scheme is as follows:
the application of the oyster shell soil conditioner in shaddock planting, the oyster shell soil conditioner comprises stepwise calcined oyster shells and organic matters, wherein the stepwise calcined oyster shells account for 70% -80% of the total weight.
Further, the application amount of the oyster shell soil conditioner applied to the soil planted with the grapefruits is 2.5-7.5kg per grapefruit tree.
Further, the oyster shell soil conditioner is used for reducing the soil volume weight of the soil for planting the grapefruits and improving at least one of pH, available phosphorus content, quick-acting potassium content, total nitrogen content, organic matter content and carbon nitrogen ratio of the soil for planting the grapefruits.
The invention also provides a preparation method of the oyster shell soil conditioner, which comprises the following steps:
step 1) carrying out stepwise calcination on oyster shells, wherein the stepwise calcination at least comprises two calcination temperatures: the method comprises the steps of (1) a first calcination temperature and a second calcination temperature, wherein the first calcination temperature is 300-550 ℃, the second calcination temperature is 900-1200 ℃, and cooling to obtain step-type calcined oyster shells;
step 2) taking one or more than one of the wastes generated in the breeding or processing process of fish, shrimp, shellfish, algae or livestock and poultry animals, and drying to obtain organic matters;
step 3) mixing the step calcined oyster shell in the step 1) with the organic matters in the step 2), and crushing to prepare a mixture, wherein the step calcined oyster shell accounts for 70% -80% of the total weight of the mixture;
and 4) granulating the mixture obtained in the step 3) to obtain the oyster shell soil conditioner.
Further, in the step 1), the first calcining temperature is 450-530 ℃ and the second calcining temperature is 980-1030 ℃.
Further, in the step 1), the step calcination is performed by heating to 500 ℃ at a heating rate of 20 ℃/min, preserving heat for 10min, heating to 1000 ℃ at a heating rate of 20 ℃/min, and preserving heat for 10min.
Further, step calcined oyster shell in step 3) accounts for 73% or 75% of the total weight of the mixture.
Further, in the step 3), a superfine pulverizer is adopted for the pulverization.
And further, the granulating mode in the step 4) is that the mixture is input into a rotary drum granulator for steam granulation, the granules are dried by blowing hot air into a dryer after the particle size is 1-2mm, the dried granules are subjected to steam granulation again, and the granules are dried by blowing hot air into the dryer after the particle size is 4-5 mm.
The invention also protects the oyster shell soil conditioner prepared by the preparation method of the oyster shell soil conditioner.
The beneficial effects are that: the invention adopts the step calcining technology, the obtained oyster shell has a unique micropore structure, the improvement effect on the planting of the shaddock tree is obvious after the combination of organic matters, 70-80 parts of the step high-temperature calcined oyster shell and 20-30 parts of organic matters are mixed, the fertility of the oyster shell soil conditioner can be obviously improved, and the superfine pulverizing technology is adopted, so that the organic matters are contained in the oyster shell micropore structure, the loss is difficult, the soil fertility is provided for a long time, and the technical defects of poor fertility effect and durability of the existing oyster shell soil conditioner are overcome. The oyster shell soil conditioner prepared by adopting the intermittent fractional granulation can be slowly released in soil, and the effect is better. The oyster shell soil conditioner disclosed by the invention can obviously reduce the volume weight of soil, obviously improve the pH value, available phosphorus, quick-acting potassium, total nitrogen, organic matters and carbon nitrogen ratio of the soil, has a good improvement effect on the soil for planting the pomelo, and can also obviously improve the yellowing condition of the pomelo leaves.
Drawings
FIG. 1 is a scanning electron micrograph (magnification 5000) of uncalcined oyster shell according to example 1 of the present invention;
fig. 2 is a scanning electron microscope (magnification: 5000 times) of a stepwise high temperature calcined oyster shell according to example 1 of the present invention.
Detailed Description
The technical scheme of the invention is further described below by combining examples. The specific techniques or conditions are not identified in the examples and are performed according to techniques or conditions described in the literature in this field or according to the product specifications. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention.
Example 1
(1) The oyster shell is sent into a high temperature furnace, firstly heated to 500 ℃ at a heating rate of 20 ℃/min, then kept warm for 10min, then heated to 1000 ℃ at a heating rate of 20 ℃/min, kept warm for 10min, naturally cooled to room temperature, and then taken out of the high temperature furnace.
(2) And (5) preparing the wastes in the processing process of the fish and the shrimp into dry organic matter components.
(3) Mixing 70 parts of oyster shell taken out of a high-temperature furnace with 30 parts of the dry organic matter component, crushing by a superfine crusher, and uniformly mixing to prepare a mixture.
(4) And (3) inputting the crushed oyster shell and organic matter component mixture into a rotary drum granulator for steam granulation, blowing hot air into a rotary dryer to dry the particles after the particle size of the particles is 1-2mm, continuing steam granulation, and blowing hot air into the rotary dryer to dry the particles after the particle size of the particles is 4-5mm, thereby obtaining the oyster shell soil conditioner.
Example 2
(1) The oyster shell is sent into a high temperature furnace, firstly heated to 530 ℃ at a heating rate of 20 ℃/min, kept warm for 10min, then heated to 980 ℃ at a heating rate of 20 ℃/min, kept warm for 10min, naturally cooled to room temperature, and then taken out of the high temperature furnace.
(2) And (5) preparing dried organic matter components from shrimp, shellfish and algae processing wastes.
(3) Mixing 75 parts of oyster shells taken out of a high-temperature furnace with 25 parts of the dry organic matter components, crushing by a superfine crusher, and uniformly mixing to prepare a mixture.
(4) And (3) inputting the crushed oyster shell and organic matter component mixture into a rotary drum granulator for steam granulation, blowing hot air into a rotary dryer to dry the particles after the particle size of the particles is 1-2mm, continuing steam granulation, and blowing hot air into the rotary dryer to dry the particles after the particle size of the particles is 4-5mm, thereby obtaining the oyster shell soil conditioner.
Example 3
(1) The oyster shell is sent into a high temperature furnace, firstly heated to 450 ℃ at a heating rate of 20 ℃/min, then kept for 10min, then heated to 1030 ℃ at a heating rate of 20 ℃/min, kept for 10min, naturally cooled to room temperature, and then taken out of the high temperature furnace.
(2) And (5) taking waste generated by chicken and duck breeding to prepare a dry organic matter component.
(3) Mixing 80 parts of oyster shell taken out of a high-temperature furnace with 20 parts of the dry organic matter component, crushing by a superfine crusher, and uniformly mixing to prepare a mixture.
(4) And (3) inputting the crushed oyster shell and organic matter component mixture into a rotary drum granulator for steam granulation, blowing hot air into a rotary dryer to dry the particles after the particle size of the particles is 1-2mm, continuing steam granulation, and blowing hot air into the rotary dryer to dry the particles after the particle size of the particles is 4-5mm, thereby obtaining the oyster shell soil conditioner.
Example 4
(1) And (3) sending the oyster shells into a high-temperature furnace, heating to 300 ℃ at a heating rate of 20 ℃/min, preserving heat for 10min, heating to 1200 ℃ at a heating rate of 20 ℃/min, preserving heat for 10min, and naturally cooling to room temperature to obtain the step-type calcined oyster shells.
(2) And (5) drying wastes in the pig farm to obtain organic matters.
(3) 73 parts of step-calcined oyster shell and 27 parts of organic matter are mixed, crushed by a superfine crusher and uniformly mixed to prepare a mixture.
(4) And (3) inputting the mixture obtained in the step into a rotary drum granulator for steam granulation, blowing hot air into the dryer to dry the granules after the particle size of the granules is 1-2mm, and then continuously performing steam granulation, and blowing hot air into the dryer to dry the granules after the particle size of the granules is 4-5mm, thus obtaining the oyster shell soil conditioner.
Example 5
(1) And (3) sending the oyster shells into a high-temperature furnace, heating to 550 ℃ at a heating rate of 20 ℃/min, preserving heat for 10min, heating to 900 ℃ at a heating rate of 20 ℃/min, preserving heat for 10min, and naturally cooling to room temperature to obtain the step-type calcined oyster shells.
(2) And drying wastes in the poultry processing process to obtain organic matters.
(3) Mixing 80 parts of step calcined oyster shell and 20 parts of organic matters, crushing by using an ultra-fine crusher, and uniformly mixing to prepare a mixture.
(4) And (3) inputting the mixture obtained in the step into a rotary drum granulator for steam granulation, blowing hot air into the dryer to dry the granules after the particle size of the granules is 1-2mm, and then continuously performing steam granulation, and blowing hot air into the dryer to dry the granules after the particle size of the granules is 4-5mm, thus obtaining the oyster shell soil conditioner.
Comparative example 1
This example is essentially the same as example 1, except that step (1) is replaced with: and (3) sending the oyster shells into a high-temperature furnace, heating to 1000 ℃, preserving heat for 30min, and naturally cooling to room temperature, wherein the oyster shells are used for replacing the step-type calcined oyster shells in the step (3) and mixing with organic matters.
After calcination at 1000 ℃ for 30min, there was a pore structure in the oyster shell, but the pores were not dense, relatively dispersed, and sparser compared to the stepwise high temperature calcined oyster shell in example 1.
Field test 1
The oyster shell soil conditioner prepared by the method of the embodiment 1 is subjected to field test in a shaddock test field of Qingzhen, zhangzhou, fujian, and Qingzhen, the application amount is 2.5 kg/plant, the geographic coordinates of the test field are 24 DEG 18 '45' North latitude, 117 DEG 12 '52' east longitude and 210+/-6 m altitude.
The fertilizer application amount test of the oyster shell soil conditioner is divided into a control group (a non-fertilizer application group) and a fertilizer application group, and 6 trees are taken from each group by adopting a random sampling design, and the total number of the trees is 12.
Soil sampling is carried out on each tree before fertilization, and the sampling mode is as follows: removing 1-2 cm of floating soil on the surface, collecting soil samples with the depth of 2-15 cm by using a soil sampling ring cutter, and taking 3 200cm of soil samples from each tree 3 Sites and 2 100cm 3 A site. 3 trees of 200cm each were grown 3 Uniformly mixing soil samples at the sites, bagging, taking the soil samples back to a laboratory to detect the pH, organic matters, total nitrogen, available phosphorus, quick-acting potassium and carbon nitrogen ratio of the soil, and taking 2 trees of 100cm each 3 Respectively bagging soil samples and bringing the soil samples back to a laboratory for detecting the volume weight of the soil.
After soil sampling, respectively applying oyster shell soil conditioner to each tree according to the amount of test design, and then applying the same amount of base fertilizer (boron fertilizer, silicon fertilizer and magnesium fertilizer). And (5) field management is carried out according to the conventional management.
And (3) after three months of field management, collecting soil samples again by adopting the same method, and detecting the pH value, organic matters, total nitrogen, available phosphorus, quick-acting potassium, carbon-nitrogen ratio and volume weight of the soil.
The detection method of the soil pH adopts the determination of the soil pH of the national agricultural industry standard NY/T1377-2007 of the people's republic of China. The detection method of the volume weight adopts the soil detection part 4 of the agricultural industry standard NY/T1121.4-2006 of the people's republic of China: determination of soil volume weight. The detection method of the available phosphorus and the available potassium adopts the combined leaching-colorimetric method for determining the ammonium nitrogen, the available phosphorus and the available potassium of the acid soil of the agricultural industry standard NY/T1849-2010 of the people's republic of China. The detection method of the organic matters adopts the soil detection part 6 of the agricultural industry standard NY/T1121.6-2006 of the people's republic of China: soil organic matter measurement. The soil carbon-nitrogen ratio detection method adopts the forest industry standard LY/T1237-1999 of forest soil organic matter determination and carbon-nitrogen ratio calculation of the people's republic of China.
The results are shown in Table 1:
TABLE 1 results of field test with oyster shell soil conditioner applied at 2.5 kg/plant
The field test result shows that the oyster shell soil conditioner can obviously reduce the volume weight of soil, obviously improve the pH value, available phosphorus, quick-acting potassium, total nitrogen, organic matter and carbon nitrogen ratio of the soil, and has a good improvement effect on the grapefruit planting soil.
Before field test, a grapefruit tree with serious yellowing of the grapefruit leaves is selected as an observation object, the yellowing of the grapefruit leaves of the tree is observed, and the grapefruit tree is photographed, wherein the yellowing She Jiaoduo of the grapefruit tree mainly comprises that new leaves and most of leaves positioned in the middle of a supporting rod are obvious in yellowing, the old She Yanse is dark, and the whole grapefruit tree is poor in growth vigor. 2.5kg of oyster shell soil conditioner is applied to the tree, and after 3 months, observation and photographing are carried out, so that the yellowing of the shaddock leaves of the tree is obviously improved, the whole plant of the tree is a normal green leaf without yellowing leaves, the new leaves are luxuriant and light green, and the growth vigor of the shaddock tree is obviously better than that before 3 months, and the oyster shell soil conditioner has a good effect of improving the yellowing of the shaddock leaves.
Field test 2
Referring to the method in field test 1, the oyster shell soil conditioner prepared in example 2 of the present invention was used for field test with an application amount of 5 kg/plant, and the results are shown in Table 2:
TABLE 2 results of field trials with oyster shell soil conditioner applied at 5 kg/plant
The field test result shows that the oyster shell soil conditioner can obviously reduce the volume weight of soil, obviously improve the pH value, available phosphorus, quick-acting potassium, total nitrogen, organic matter and carbon nitrogen ratio of the soil, and has a good improvement effect on the grapefruit planting soil. From the aspect of growth vigor of the naringenin, the oyster shell soil conditioner of the invention has better improvement of growth vigor, mainly shows that the whole plant leaves are normal green leaves and do not serve as yellowing leaves, and the new leaves are luxuriant and bright light green and better vivid.
Comparing the data in table 2 and table 1 can find that the soil for planting the grapefruits has a wide distribution range, the soil has a difference, the soil which is also used as a control group has a difference in soil volume weight, soil pH, available phosphorus, quick-acting potassium, total nitrogen, organic matters, carbon nitrogen ratio and the like, which also shows that the idea of improving the lack of a certain element by adopting a traditional chemical fertilizer of a certain type is difficult to succeed, and the grapefruit planting needs to improve the comprehensive performance of the soil from the aspect of improving the soil.
Field test 3
Referring to the method in field test 1, the oyster shell soil conditioner prepared in example 3 of the present invention was used for field test with an application amount of 7.5 kg/plant, and the results are shown in Table 3:
TABLE 3 results of field test with oyster shell soil conditioner applied at 7.5 kg/plant
Field test 4
Referring to the method in field test 1, field test was conducted using the oyster shell soil conditioner prepared in comparative example 1 at a rate of 7.5 kg/plant, and the control group was identical to field test 3, and the results are shown in table 4:
table 4 comparative oyster shell soil conditioner field test results table
The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the scope of the technical concept of the present invention, and all the simple modifications belong to the protection scope of the present invention.
In addition, the specific features described in the above embodiments may be combined in any suitable manner without contradiction. The various possible combinations of the invention are not described in detail in order to avoid unnecessary repetition.
Moreover, any combination of the various embodiments of the invention can be made without departing from the spirit of the invention, which should also be considered as disclosed herein.
Claims (8)
1. The application of the oyster shell soil conditioner in shaddock planting is characterized in that: the oyster shell soil conditioner comprises stepwise calcined oyster shells and organic matters, wherein the stepwise calcined oyster shells account for 70% -80% of the total weight, and the application amount of the oyster shell soil conditioner applied to the soil for planting the grapefruits is 2.5-7.5. 7.5kg per grapefruit tree; the preparation method of the oyster shell soil conditioner comprises the following steps:
step 1) carrying out step-type high-temperature calcination on oyster shells, wherein the step-type high-temperature calcination at least comprises two calcination temperatures: the method comprises the steps of (1) a first calcination temperature and a second calcination temperature, wherein the first calcination temperature is 450-530 ℃, and the temperature is kept for 10min; the second calcination temperature is 980-1030 ℃, and the temperature is kept for 10min; cooling to obtain step calcined oyster shell;
step 2) taking one or more than one of the wastes generated in the breeding or processing process of fish, shrimp, shellfish, algae or livestock and poultry animals, and drying to obtain organic matters;
step 3) mixing the step calcined oyster shell in the step 1) with the organic matters in the step 2), and crushing to prepare a mixture, wherein the step calcined oyster shell accounts for 70% -80% of the total weight of the mixture;
step 4) granulating the mixture obtained in the step 3) to obtain the oyster shell soil conditioner; the granulating mode is that the mixture is input into a rotary drum granulator for steam granulating, the granules are dried by blowing hot air into a dryer after the grain size is 1-2mm, the dried granules are subjected to steam granulating again, and the granules are dried by blowing hot air into the dryer after the grain size is 4-5 mm.
2. Use of oyster shell soil conditioner according to claim 1 in grapefruit planting, characterized in that: the oyster shell soil conditioner is used for reducing the soil volume weight of the soil for planting the grapefruits and improving at least one of pH, available phosphorus content, quick-acting potassium content, total nitrogen content, organic matter content and carbon nitrogen ratio of the soil for planting the grapefruits.
3. The method for preparing the oyster shell soil conditioner in the use of the oyster shell soil conditioner in grapefruit planting as claimed in claim 1, which is characterized in that: the method comprises the following steps:
step 1) carrying out step-type high-temperature calcination on oyster shells, wherein the step-type high-temperature calcination at least comprises two calcination temperatures: the method comprises the steps of (1) a first calcination temperature and a second calcination temperature, wherein the first calcination temperature is 450-530 ℃, and the temperature is kept for 10min; the second calcination temperature is 980-1030 ℃, and the temperature is kept for 10min; cooling to obtain step calcined oyster shell;
step 2) taking one or more than one of the wastes generated in the breeding or processing process of fish, shrimp, shellfish, algae or livestock and poultry animals, and drying to obtain organic matters;
step 3) mixing the step calcined oyster shell in the step 1) with the organic matters in the step 2), and crushing to prepare a mixture, wherein the step calcined oyster shell accounts for 70% -80% of the total weight of the mixture;
and 4) granulating the mixture obtained in the step 3) to obtain the oyster shell soil conditioner.
4. The method for preparing oyster shell soil conditioner according to claim 3, wherein: the step high-temperature calcination in the step 1) is to heat up to 500 ℃ at a heating rate of 20 ℃/min, heat up to 1000 ℃ at a heating rate of 20 ℃/min, and heat up to 10min.
5. The method for preparing oyster shell soil conditioner according to claim 3, wherein: the step calcined oyster shell in step 3) accounts for 73% or 75% of the total weight of the mixture.
6. The method for preparing oyster shell soil conditioner according to claim 3, wherein: in the step 3), a superfine pulverizer is adopted for the pulverization.
7. The method for preparing oyster shell soil conditioner according to claim 3, wherein: and 4) the granulating mode in the step 4) is that the mixture is input into a rotary drum granulator for steam granulating, the granules are dried by blowing hot air into a dryer after the particle size is 1-2mm, the dried granules are subjected to steam granulating again, and the granules are dried by blowing hot air into the dryer after the particle size is 4-5 mm.
8. Oyster shell soil conditioner prepared by the method for preparing oyster shell soil conditioner of any one of claims 3-7.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810492965.5A CN108774533B (en) | 2018-05-22 | 2018-05-22 | Oyster shell soil conditioner, preparation method thereof and application thereof in shaddock planting |
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| CN201810492965.5A CN108774533B (en) | 2018-05-22 | 2018-05-22 | Oyster shell soil conditioner, preparation method thereof and application thereof in shaddock planting |
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| CN111394104A (en) * | 2020-04-16 | 2020-07-10 | 武汉市秀谷科技有限公司 | Soil conditioner and preparation and use methods thereof |
| CN111548801A (en) * | 2020-05-12 | 2020-08-18 | 集美大学 | Oyster shell soil conditioner and application method thereof in tomato planting |
| CN113940164A (en) * | 2020-07-15 | 2022-01-18 | 贵州金沙贡茶茶业有限公司 | Tea garden soil improvement method |
| CN113185368A (en) * | 2021-05-17 | 2021-07-30 | 厦门市江平生物基质技术股份有限公司 | Matrix for improving honey pomelo orchard soil and application |
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