CN108147920B - Conditioner for reducing pH value of calcareous sandy soil and preparation method and application thereof - Google Patents
Conditioner for reducing pH value of calcareous sandy soil 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
- C05G3/80—Soil conditioners
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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
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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
- C05B1/04—Double-superphosphate; Triple-superphosphate; Other fertilisers based essentially on monocalcium phosphate
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/02—Soil-conditioning materials or soil-stabilising materials containing inorganic compounds only
- C09K17/06—Calcium compounds, e.g. lime
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- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09K2101/00—Agricultural use
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- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2109/00—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE pH regulation
Abstract
The conditioner for reducing the pH value of the calcareous sandy soil comprises a conditioner adhesive film-clay material and a chemical fertilizer, wherein the conditioner adhesive film-clay material and the chemical fertilizer are in a mass ratio of 7: 3-9: 1, and the conditioner adhesive film-clay material comprises, by weight, 50-70 parts of clay material and at least one of 10-15 parts of goethite powder, 10-15 parts of hematite powder, 2-10 parts of aluminum sulfate and 3-6 parts of ferrous sulfate; the chemical fertilizer comprises 2-3 of 4-8 parts of urea, 6-10 parts of ammonium phosphate nitrate, 10-20 parts of calcium superphosphate, 4-20 parts of triple superphosphate, 4-8 parts of potassium chloride, 5-10 parts of potassium sulfate and 4-8 parts of potassium nitrate; the invention has low improvement cost and simple and convenient operation method, and the improved calcareous sandy soil can be used for directly planting or transplanting plants and has good improvement effect. The fertility of the calcareous sandy soil is rapidly cultivated in situ, the construction procedures are reduced, the engineering investment is reduced, and the ecological environment of the calcareous sandy soil is improved.
Description
Technical Field
The invention belongs to the technical field of agriculture, and particularly relates to an improved conditioner for reducing the pH value of calcareous sandy soil, and a preparation method and application thereof.
Background
The saline soil and alkaline earth distributed in continental areas of China have high pH values generally, the pH value of the saline soil is about 8.5 generally, and the saline soil belongs to alkaline soil according to the soil pH value judgment standard; the pH value of the alkaline earth is higher and is 8.5-11.0. According to the soil pH value classification, the pH value is 7.5-8.5 alkaline, the pH value is 8.5-9.5 strong alkaline, and the pH value is>9.5 are very basic. The reason for the high pH of alkaline earth is mainly the high content of exchangeable sodium ions (Na) in the soil colloid+) Is one of the most critical factors forming the problem of soil barrier. At present, the existing technology for improving saline-alkali soil at home and abroad has a mature technology, and the basic principle is that the technology is applied to soilAdding calcium-containing material, such as gypsum (CaSO)4) Etc. by modifying the calcium ion (Ca) in the material2+) Removing Na on the surface of soil colloid+Irrigating with fresh water to remove Na in soil+The concentration of the saline-alkali soil is reduced to a proper range, and the pH value of the saline-alkali soil can be reduced to below 8.5 after the saline-alkali soil is improved.
The calcareous sandy soil has some basic properties of soil, thick texture, more than 95 percent of particles with the particle size of more than 0.25mm, extremely poor water and fertilizer retention property and extremely easy leaching loss of nutrients. The main chemical component of the calcareous sandy soil is calcium carbonate (CaCO)3) Its pH value is up to about 9.6, and it is very strong alkaline, and its Ca element is rich, and its Si, Fe and Al elements are deficient. Due to the extremely strong alkaline environment of the calcareous sandy soil, the applied nitrogen fertilizer is extremely easy to volatilize and lose, and phosphorus is extremely easy to fix and is difficult to be absorbed and utilized by plants. If vegetation is directly planted on the calcareous sandy soil or nursery stocks are transplanted, the survival rate of the vegetation is very low due to the overhigh alkalinity, even if some tree species can survive reluctantly, the annual growth biomass is very low, the plants are difficult to grow and develop, and the plants are even more unlikely to grow vigorously.
The improvement of the high pH value of the calcareous sandy soil is a new problem in the situation of optimizing national soil resources in China. The calcareous sandy soil formed after natural drying and rainfall desalination can be subjected to ecological improvement in a vegetation natural succession mode, but the period required by the natural improvement is too long, and the soil suitable for vegetation growth can be formed only after hundreds of years or even thousands of years, and the natural succession mode cannot meet the requirements of rapid fertility cultivation and vegetation construction of the calcareous sandy soil in China. In order to rapidly afforest vegetation on calcareous sandy soil, the most common method is soil dressing improvement, and vegetation planting and transplanting on the calcareous sandy soil are mainly improved by a traditional soil dressing method. The soil-covering method is to add soil covering to lime sandy soil to make the pH value of the mixture reach the range suitable for vegetation growth. However, the soil dressing method has many problems, if the required soil dressing amount is large, the existing soil dressing method improvement results show that the transplanted vegetation can survive and grow well only by using the brick red soil accounting for more than 50% of the volume of the sandy soil, and the soil dressing improvement method is not beneficial to the sustainable development of soil resources due to high transportation cost, damage to the natural ecological environment of the soil dressing and soil taking place. The pH value of soil suitable for common plants is generally 5.0-8.5, and until now, no related improvement technology for reducing the pH value of calcareous sandy soil by specially aiming at the extremely strong alkalinity of the calcareous sandy soil exists.
Disclosure of Invention
The technical problem to be solved is as follows: in order to overcome the defects of the prior art, rapidly cultivate and construct the fertility of the calcareous sandy soil, and rapidly reduce the fertility barriers of strong basicity and the like of the calcareous sandy soil in situ, the invention provides a conditioner for reducing the pH value of the calcareous sandy soil, and a preparation method and application thereof.
The technical scheme is as follows: the conditioner for reducing the pH value of the calcareous sandy soil consists of an adhesive film-clay material and a chemical fertilizer, wherein the mass ratio of the adhesive film-clay material to the chemical fertilizer is 7: 3-9: 1, and the adhesive film-clay material comprises 50-70 parts of clay material and at least one of 10-15 parts of goethite powder, 10-15 parts of hematite powder, 2-10 parts of aluminum sulfate and 3-6 parts of ferrous sulfate; the chemical fertilizer comprises 4-8 parts of urea, 6-10 parts of ammonium phosphate nitrate, 10-20 parts of calcium superphosphate, 4-20 parts of triple superphosphate, 4-8 parts of potassium chloride, 5-10 parts of potassium sulfate and 4-8 parts of potassium nitrate, wherein any 2-3 of nitrogen, phosphorus and potassium are necessary elements, and N is P2O5:K2And O is an element component calculation unit, and the mass ratio of any two of the elements is (1-3) to (3-1).
The conditioner for reducing the pH value of the calcareous sandy soil preferably comprises 54 parts of clay material, 10 parts of aluminum sulfate, 6 parts of ferrous sulfate, 6 parts of urea, 16 parts of triple superphosphate and 8 parts of potassium nitrate.
The preparation method of the conditioner for reducing the pH value of the calcareous sandy soil comprises the steps of grinding the materials, processing the materials by passing through a 100-mesh sieve, and uniformly mixing the materials in proportion.
The conditioner is applied to reducing the pH value of the calcareous sandy soil.
The application steps are as follows: raking the surface of the calcareous sandy soil to be improved, then uniformly scattering the prepared conditioner on the surface of the calcareous sandy soil, turning and uniformly mixing the conditioner and the calcareous sandy soil according to the depth to be improved, and spraying fresh water until the mixture is saturated; after the mixture is placed for 24 hours, the mixture is turned over and mixed again, and the mixture is placed for 24 hours again to finish the process.
The application amount of the conditioner is 2-3% of the mass of the calcareous sandy soil.
Has the advantages that: the pH value conditioner for the calcareous sandy soil prepared by the invention comprises inorganic materials as material components, and the main functions of the iron-aluminum oxide and the clay material are to form a layer of indissolvable iron-aluminum oxide adhesive film on the surface of the calcareous sandy soil particles and reduce the ionic activity on the surface of the calcareous sandy soil particles, thereby achieving the purpose of reducing the pH value of the calcareous sandy soil in situ, quickly and efficiently. The chemical fertilizer component in the conditioner is mainly used for adjusting the exchange performance and the buffering performance of the surface of the calcareous sandy soil particle, and simultaneously provides some nutrient components and trace elements necessary for plant growth, thereby being beneficial to the growth and development of vegetation. The invention has low improvement cost and simple and convenient operation method. According to the method, the on-site calcium carbonate sandy soil is directly utilized, the acid-base conditioner is scattered on the surface of the on-site calcium carbonate sandy soil or in the growth range of a plant root system according to the vegetation greening requirement for in-situ improvement, the required improvement material only accounts for 2-3% of the mass of the sandy soil, the improved calcareous sandy soil can be used for directly planting or transplanting plants, the improvement effect is good, the fertility of the calcareous sandy soil is rapidly cultivated in situ, the construction procedures are reduced, the engineering investment is reduced, and the ecological environment of the calcareous sandy soil is improved.
Drawings
FIG. 1 is a comparison graph of the results of the growth monitoring of Bermuda grass sowed before and after improvement of calcareous sandy soil;
FIG. 2 is a graph showing the dynamic comparison of the growth of transplanted small green vegetables treated differently; the first row is unmodified undisturbed calcareous sandy soil treatment (control); the second row is a modified treatment with the addition of an acid-base conditioner.
Detailed description of the preferred embodiment
The following examples are only for illustrating the technical idea and features of the present invention, and are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Example 1
The influence of the addition amount of the acid-base conditioner on the reduction of the pH value of the calcareous sandy soil. Respectively weighing 10 parts of goethite powder, 5 parts of ferrous sulfate, 70 parts of clay material, 6 parts of ammonium phosphate nitrate, 4 parts of calcium superphosphate and 5 parts of potassium sulfate by weight of the acid-base conditioner, respectively grinding the 6 weighed materials, sieving the ground materials through 100-mesh sieve holes, and fully and uniformly mixing the materials to prepare about 270g of pH value conditioner powder for an improvement effect test.
And (3) collecting a calcareous sandy soil sample from a site in situ, and carrying back to a laboratory for an improvement effect test of the addition amount of the conditioner on the reduction of the pH value of the calcareous sandy soil. The test was run for a total of 7 treatments (see conditioner addition ratio in table 1), each treatment was repeated 3 times. Of the 7 treatments, 6 improved treatments with no conditioner added as a control, the conditioner added amounts accounted for 0.5%, 1.0%, 2.0%, 2.5%, 3.0%, and 3.5% of the mass of the soil, respectively (see table 1).
21 pots for test having a volume of 2L were prepared, and each pot was filled with 1kg of dry soil as it is. And (3) treating according to the addition amount of the 5 conditioners, respectively weighing the prepared acid-base conditioners by 5g, 10g, 20g, 25g, 30g and 35g, respectively scattering the three parts into 15 flowerpots treated differently, and fully stirring and uniformly mixing the three parts with sandy soil in the flowerpots. Secondly, spraying water to sandy soil in each flowerpot until the sandy soil is nearly saturated, standing for 24 hours, collecting soil samples, measuring the pH value, standing for 2 days, 1 week, 2 weeks and 1 month, respectively sampling for 2 nd time, 3 rd time, 4 th time and 5 th time, measuring the pH value, and measuring the average result of each treatment and measurement as shown in table 1.
TABLE 1 influence of different conditioner additions on the pH variation dynamics of calcareous sandy soil
As can be seen from the results of the measurements in Table 1, as the pH of the soil in the flowerpot is increased from 0.5% to 3.5%, the pH is rapidly decreased and kept stable within 24 hours after the addition of the acid-base conditioner. When the addition amount of the conditioner is less than 1.0 percent, the improvement effect is not ideal enough, and the requirement of stably reducing the pH value to be less than 8.5 cannot be met. When the concentration of the conditioner is 2%, the pH value of the improved soil can be stabilized below 8.2, and the pH value range suitable for the growth and development of most of vegetation is basically reached. As the application amount of the conditioner is increased to be more than 2.5%, the pH value of the soil can be basically stabilized to be less than 8.0. From the viewpoint of cost improvement, the addition amount of the acid-base conditioner is preferably 2 to 3% of the mass of the calcareous sandy soil.
Example 2
Influence of the calcareous sandy soil on the growth of ryegrass after being improved by a conditioner. The conditioner comprises, by weight, 10 parts of hematite powder, 5 parts of aluminum sulfate, 60 parts of clay materials, 5 parts of urea, 15 parts of calcium superphosphate and 5 parts of potassium chloride, wherein the 6 weighed materials are ground and sieved through a 100-mesh sieve, and are fully and uniformly mixed to prepare about 700g of pH value conditioner powder for a ryegrass growth test for improving effects of sandy soil.
The method comprises the steps of collecting calcareous sandy soil from a site as a culture medium, performing an improvement effect test of reducing the pH value of the calcareous sandy soil by using a conditioner in a greenhouse, wherein a plant sowed in a pot experiment is ryegrass, and performing two treatments of no improvement (control CK) and improvement (5G) by using an acid-base conditioner respectively, wherein each treatment is repeated for 3 times. The volume of the pot used for each control-treated pot test was 16L, and the pot was filled with 11 liters of dry sandy soil as it is, and the sandy soil weighed about 11.6 kg/pot. In the conditioning treatment, 230g of conditioning agent was applied per pot at a rate of 2% by weight of the soil. And uniformly stirring the conditioner and the calcareous sandy soil in the flowerpot, and spraying water, wherein the water spraying amount is preferably that the soil in the flowerpot is fully moistened. After each treatment is placed for 3 days, 540g of organic fertilizer and 15g of compound fertilizer are respectively applied to each pot, rye grass seeds are scattered in the pots, watering management is carried out regularly, the germination and growth dynamics of the seeds after the grass seeds are sowed are recorded, and the monitoring result of the growth condition of the rye grass after 168 days of sowing the seeds is shown in figure 1.
As can be seen from fig. 1, the lolium growth was significantly better for the acid and base conditioner modified treatments than for the control treatment. After the ryegrass seeds are sowed for 40 days, the ryegrass leaves treated in a contrast manner begin to yellow, and the newly formed vegetation biomass is almost absent in the later growth period, which indicates that the leakage and loss of nutrients of the fertilizer directly applied to the calcareous sandy soil are serious, and the nutrient supply of the soil in the later growth period of the vegetation is obviously insufficient; under the same fertilizing and irrigating conditions, after the soil is improved by an acid-base conditioner, the sandy soil water and fertilizer retention performance is obviously better than that of a control, the biomass of vegetation formed by the soil is obviously increased in the later growth stage of the vegetation, and the vegetation growth condition is obviously better than that of the control. The post-harvest fresh weight monitoring results for each treated and sown ryegrass showed that the average fresh weight of ryegrass harvested per pot for the control treatment was 28 g/pot, while the average fresh weight of ryegrass harvested after the conditioning treatment was added was 316 g/pot, which increased the biomass by 10.3 times over the control.
Example 3
The calcareous sandy soil is improved by an acid-base conditioner to influence the growth of the small green vegetables. The acid-base conditioner is prepared by respectively weighing 10 parts of aluminum sulfate, 6 parts of ferrous sulfate, 54 parts of clay material, 6 parts of urea, 16 parts of calcium superphosphate and 8 parts of potassium nitrate by weight parts, grinding the weighed materials respectively, sieving the ground materials through 100-mesh sieve holes, and fully and uniformly mixing the ground materials to prepare about 1050g of pH value conditioner powder for a small green vegetable growth test with a soil improvement effect.
And (3) collecting calcareous sandy soil on site as a culture medium, and carrying out a pot improvement effect test in a greenhouse, wherein the crops transplanted in the pot test are small green vegetables. The test is respectively provided with two treatments of unmodified undisturbed sandy soil (contrast) and modified by adding acid-base conditioning agent, and each treatment is respectively 3 times. The volume of each pot experiment was 16L, the volume of sand was 11L/pot, and the weight of the sand was about 11.6 kg/pot. Wherein 350g of acid-base conditioning agent is added into each basin in the improvement treatment, and the dosage of the acid-base conditioning agent accounts for 3% of the mass of the sandy soil. 2 parallel small ditches are dug in the long axis direction respectively for each treatment, the depth of each ditch is 6-7cm, base fertilizer is uniformly applied into the ditches, the application amount of the base fertilizer is 540g per basin of organic fertilizer and 15g per basin of compound fertilizer, small green vegetable seedlings with soil are planted into the base fertilizer, 8 small green vegetable seedlings are transplanted in each basin, sandy soil is covered on the base fertilizer, the thickness is about 2-3cm, and then water is poured thoroughly. And performing subsequent management such as fertilization and water spraying on each treatment, spraying water once every 2-3 days, wherein the water spraying amount is preferably that the soil matrix is saturated. The results of monitoring the growth conditions of the differently processed brassica chinensis are shown in fig. 2 after 5 days, 25 days and 45 days of brassica chinensis transplantation.
As can be seen from the monitoring effect shown in FIG. 2, when the small green vegetable transplanting test is carried out, after the small green vegetables are transplanted for 25 days, the leaves of the small green vegetables obviously turn yellow, the fertilizer deficiency phenomenon is serious, the biomass of the newly formed leaves is not obviously increased, and the phenomena of water leakage, fertilizer leakage and nutrient loss exist; in the improved treatment of adding the acid-base conditioner, the growth condition of the small green vegetables is obviously better than that of the control, the size and the thickness of the leaves are obviously increased, and the biomass of the newly formed leaves is obviously increased after 45 days of transplantation. Harvesting the fresh weight of the overground part after the small green vegetables are transplanted for two months, wherein the results of measuring the fresh weight of the small green vegetables subjected to different treatments and the pH value of a matrix show that the pH value of the soil subjected to control treatment is 9.4, and the average fresh weight of the small green vegetables harvested on the overground part is 68 g/pot; the pH value of the sandy soil improved by adding the conditioner is 7.2, the fresh weight of the small vegetables harvested on the ground is 595 g/pot, and the fresh weight of the small vegetables harvested after improvement is 7.8 times that of a control.
Compared with the existing soil dressing improvement method, the method has the advantage that the amount of the added conditioner material is less. According to the measured data of the sample, the volume weight of the brick red soil is 1.3g/cm3The volume weight of the calcareous sandy soil is 1.05g/cm3. If 1 hectare of calcareous sandy soil needs to be improved, the addition volume of the foreign soil and the sandy soil respectively account for 50 percent, and the amount of the foreign soil needed is 1000m3×1.3g/cm31300 tons; the dosage of the acid-base conditioner prepared by the invention is only about 2-3% of the sand soil weight, and the dosage per hectare is only 42 tons. And secondly, the improvement cost is low, 1300 tons of foreign soil need to be transported when the transport cost of the improved material is quite high, and the calcareous sandy soil acid-base conditioner only needs to transport 42 tons, so that the transport amount of the material can be reduced by 1258 tons per hectare of improvement, and the transport cost is greatly reduced. In another aspect, the inventionThe application amount of the prepared conditioner is greatly reduced compared with the amount of the soil, a large amount of manpower and material resources can be saved in the field improvement construction process, and the improvement cost is saved to a certain extent. In a word, the invention has the advantages of less material consumption, simple and convenient construction operation, low improvement cost, good improvement effect and the like.
Claims (5)
1. The conditioner for reducing the pH value of the calcareous sandy soil is characterized by comprising an adhesive film-clay material and a chemical fertilizer, wherein the mass ratio of the adhesive film-clay material to the chemical fertilizer is 7: 3-9: 1, and the adhesive film-clay material comprises 50-70 parts of clay material and at least one of 10-15 parts of goethite powder, 10-15 parts of hematite powder, 2-10 parts of aluminum sulfate and 3-6 parts of ferrous sulfate; the chemical fertilizer comprises 4-8 parts of urea, 6-10 parts of ammonium phosphate nitrate, 10-20 parts of calcium superphosphate, 4-20 parts of triple superphosphate, 4-8 parts of potassium chloride, 5-10 parts of potassium sulfate and 4-8 parts of potassium nitrate, wherein any 2-3 of nitrogen, phosphorus and potassium are necessary elements, and N is P2O5:K2And O is an element component calculation unit, and the mass ratio of any two of the elements is (1-3) to (3-1).
2. The conditioner for reducing the pH value of calcareous sandy soil according to claim 1, which is characterized by consisting of 54 parts of clay material, 10 parts of aluminum sulfate, 6 parts of ferrous sulfate, 6 parts of urea, 16 parts of triple superphosphate and 8 parts of potassium nitrate.
3. Use of the conditioner of claim 1 or 2 for reducing the ph of calcareous sandy soil.
4. Use according to claim 3, characterized by the steps of: raking the surface of the calcareous sandy soil to be improved, then uniformly scattering the prepared conditioner on the surface of the calcareous sandy soil, turning and uniformly mixing the conditioner and the calcareous sandy soil according to the depth to be improved, and spraying fresh water until the mixture is saturated; after the mixture is placed for 24 hours, the mixture is turned over and mixed again, and the mixture is placed for 24 hours again to finish the process.
5. Use according to claim 4, characterized in that the conditioner application amount is between 2% and 3% of the mass of the calcareous sandy soil.
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| CN101456777A (en) * | 2008-12-30 | 2009-06-17 | 仲元(北京)绿色生物技术开发有限公司 | Soil fertility amendment and preparation method thereof |
| CN101624523A (en) * | 2009-08-03 | 2010-01-13 | 张炳辉 | Saline-alkali soil amendment |
| CN104355943A (en) * | 2014-11-12 | 2015-02-18 | 山西省农业科学院农业环境与资源研究所 | Special saline-alkali-soil improvement fertilizer prepared by modification with flue gas desulfurization gypsum and preparation method thereof |
| CN104388098A (en) * | 2014-09-30 | 2015-03-04 | 广西博白县琼达农业科技有限公司 | Saline alkali soil amendment |
| CN104694134A (en) * | 2015-03-24 | 2015-06-10 | 湖南美鑫隆生态环保科技有限公司 | Soil conditioner and preparation method thereof |
| CN105368453A (en) * | 2014-08-27 | 2016-03-02 | 沈阳信达信息科技有限公司 | Saline-alkaline land improver |
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- 2017-12-13 CN CN201711326552.1A patent/CN108147920B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101456777A (en) * | 2008-12-30 | 2009-06-17 | 仲元(北京)绿色生物技术开发有限公司 | Soil fertility amendment and preparation method thereof |
| CN101624523A (en) * | 2009-08-03 | 2010-01-13 | 张炳辉 | Saline-alkali soil amendment |
| CN105368453A (en) * | 2014-08-27 | 2016-03-02 | 沈阳信达信息科技有限公司 | Saline-alkaline land improver |
| CN104388098A (en) * | 2014-09-30 | 2015-03-04 | 广西博白县琼达农业科技有限公司 | Saline alkali soil amendment |
| CN104355943A (en) * | 2014-11-12 | 2015-02-18 | 山西省农业科学院农业环境与资源研究所 | Special saline-alkali-soil improvement fertilizer prepared by modification with flue gas desulfurization gypsum and preparation method thereof |
| CN104694134A (en) * | 2015-03-24 | 2015-06-10 | 湖南美鑫隆生态环保科技有限公司 | Soil conditioner and preparation method thereof |
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