A new type of saline-alkali land improver

Abstract

The present invention provides a novel saline-alkali land conditioner, comprising agricultural waste, pine needle soil, vermiculite, leaf mold, chlorella, bone meal, and EM bacterial agent, and the present invention relates to a green soil conditioner with innovative significance. The conditioner has a unique formula, and the raw materials are not only natural and environmentally friendly, but also easy to obtain. The advantage is that it can improve soil quality from multiple angles simultaneously, including adjusting pH value, increasing fertility, optimizing soil structure, improving water retention and permeability, and improving microbial environment.

Description

Technical Field

[0001] The invention relates to the field of land improvement, and in particular to a novel saline-alkali land improver. Background Art

[0002] There have been extensive studies on the management of saline-alkali land, and there are many mature management methods, including physical and chemical modifiers, agricultural engineering restoration technology, water and salt migration control measures, salt-tolerant plant breeding, and supporting technologies for efficient utilization of agricultural resources. At present, among the many saline-alkali soil improvement measures, water conservancy engineering measures, agricultural farming measures, halophytes, chemical modifiers and other methods have been widely used, but the results are not ideal.

[0003] The patent with patent number CN202410092169.8 proposes a saline-alkali soil conditioner and a preparation method thereof. The patent proposes a preparation method of a saline-alkali soil conditioner, which is characterized in that it includes the following steps: mixing humic acid with water; adding ethanolamine and stirring; adding alkyl halogen silane and stirring; adding diatomaceous earth, drying and granulating; and mixing with brown sugar, amino oligosaccharides, sodium alginate, Bacillus licheniformis and Bacillus jelly-like.

[0004] However, it is a chemical amendment. Although chemical amendment can quickly change the soil structure, it may cause secondary pollution. Agricultural measures require a lot of manpower, material and financial resources, and biological amendment measures are slow to take effect and have a long cycle. Summary of the invention

[0005] According to the above technical problems, the present invention provides a novel saline-alkali land improver, which is characterized by comprising agricultural waste, pine needle soil, vermiculite, leaf mold, chlorella, bone meal, and EM bacterial agent, and the mass ratio thereof is:

[0006] 1-13:1-13:1-5:1-5:8-13:0.1-0.6:8-13.

[0007] The Chlorella was prepared by the Marine Biotechnology Company of the present application.

[0008] The agricultural waste includes plant waste, animal waste and crop residues.

[0009] Plant waste includes corn stalks, rice straw, cotton stalks, wheat straw, and the remaining parts of bean pods.

[0010] Animal waste includes livestock and poultry manure, livestock and poultry carcasses, and veterinary waste.

[0011] Crop residues include peels, cores, shells, leaves, roots, and branches.

[0012] The present invention has carefully designed a novel saline-alkali land improver, whose ingredients include agricultural waste, pine needle soil, vermiculite, leaf mold, chlorella, bone meal and EM bacterial agent. The ingredients work synergistically through precise mass ratio to achieve multiple effects of improving the soil quality of saline-alkali land.

[0013] Agricultural waste plays multiple roles in this formula: it not only prevents soil permeability and salt return, but also provides organic matter during the decomposition process, thereby improving soil structure. The use of this raw material realizes the resource utilization of agricultural waste and embodies the concept of environmental protection and sustainable development.

[0014] Pine needle soil, with its large particles and good water permeability, effectively prevents the problem of salt return in saline-alkali land. At the same time, the organic matter it provides during the decomposition process further enriches the fertility of the soil. The price of pine needle soil is relatively low, making it an economical and affordable amendment.

[0015] The special flake structure of vermiculite gives it excellent water holding capacity while also ensuring good air permeability. This makes vermiculite an ideal carrier of soil nutrients and microbial communities, helping to improve soil water retention and aeration.

[0016] Leaf humus effectively prevents water evaporation and salt precipitation through its water retention. At the same time, the organic matter and organic acid it provides during the decomposition process help alleviate the problem of soil alkalinization. Leaf humus is inexpensive, making it an economical choice in this formula.

[0017] Chlorella is an algae rich in nutrients and organic acids. It can improve soil structure, increase soil fertility and air permeability, facilitate the expansion of plant roots, and increase the support rate of crusted soil for plant germination and emergence. Related studies have also shown that improving soil can significantly improve the quality of vegetables.

[0018] Bone meal is rich in calcium, phosphorus and potassium. Calcium helps alleviate the toxicity of salt and sodium ions, while phosphorus and potassium can promote plant growth and development.

[0019] EM microbial agent is a beneficial microbial community that can solve the problem of reduced microbial diversity in saline-alkali land. Microorganisms such as ammonia-fixing bacteria, phosphate-solubilizing bacteria, photosynthetic bacteria and actinomycetes can help other materials in the amendment to restore the microbial flora of saline-alkali soil and effectively decompose nutrients in the soil that are difficult for plants to use, thereby improving the sustainability of saline-alkali land management.

[0020] In general, the improver formula provided by the present invention not only has natural raw materials and is environmentally friendly, but is also economical and affordable. It improves the soil quality of saline-alkali land through multi-angle effects, and provides strong technical support for the ecological restoration of saline-alkali land and sustainable agricultural development.

[0021] The beneficial effects of the present invention are:

[0022] The present invention relates to an innovative green soil conditioner. The conditioner has a unique formula, and the raw materials are natural and environmentally friendly, and are easy to obtain. The conditioner has the advantage of being able to improve soil quality from multiple angles simultaneously, including adjusting pH value, increasing fertility, optimizing soil structure, improving water retention and permeability, and improving microbial environment.

[0023] In response to a series of problems in saline-alkali land, such as poor water retention and permeability, low fertility and organic matter content, insufficient microbial activity, high alkalinity, high salinity, sodium poisoning of plants, and soil crusting, the present invention proposes a new ratio scheme. These schemes are carefully designed to overcome the inherent adverse conditions of saline-alkali land and create a more suitable environment for plant growth.

[0024] The raw materials used in the present invention are not only natural and green, but also low in price and highly economical and practical. Compared with traditional improvers and other saline-alkali land management technologies, the improver is more outstanding in restoring fertility and microbial activity, making the soil improvement effect more lasting, and providing a new solution for the ecological restoration of saline-alkali land and sustainable agricultural development. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is the flower bed soil data for mid-May 2024, the test result in an embodiment of the present invention.

[0026] Figure 2 This is the field soil data for mid-May 2024, the test results in the embodiment of the present invention.

[0027] Figure 3 This is the test result of Example 4 of the present invention.

[0028] Figure 4 This is the test result of Example 4 of the present invention.

[0029] Figure 5 These are the detection conditions of Example 4 of the present invention.

[0030] Figure 6 This is a schematic diagram showing the effect of the addition of the improver of the present invention on the pH value and conductivity of saline-alkali.

[0031] Figure 7 Schematic diagram showing the effect of adding the improver of the present invention on the exchangeable sodium and cation exchange capacity of the salt.

[0032] Figure 8 This is a schematic diagram showing the effect of adding the improver of the present invention on saline-alkali ESP and conductivity.

[0033] Fig. 9 This is a graph showing the results of the flower bed soil analysis of the present invention.

[0034] Fig.10 This is a schematic diagram showing the effect of adding the improver of the present invention on exchangeable potassium and exchangeable magnesium in salt-base.

[0035] Fig.11 This is the effect of adding the improver of the present invention on the total nitrogen and effective nitrogen indicators of the nutrients.

[0036] Fig.12 The effect of adding the improver of the present invention on the nutrient available phosphorus and exchangeable calcium indicators.

[0037] Fig.13 This is the effect of adding the improver of the present invention on the nutrient organic matter and bulk density indicators.

[0038] Fig.14 This is a diagram of field soil result analysis in an embodiment of the present invention.

[0039] Fig.15 This is a diagram of field soil result analysis in an embodiment of the present invention.

[0040] Fig.16 This is the effect of adding the improver of the present invention on the effective state of trace elements.

[0041] Fig.17 This is a diagram of field soil result analysis in an embodiment of the present invention. DETAILED DESCRIPTION

[0042] Example 1

[0043] Take 200g of raw materials: agricultural waste, 200g of pine needle soil, 100g of vermiculite, 200g of leaf mold, 0.8L of Chlorella, 37g of bone meal, and 0.8L of EM bacterial agent, mix the agricultural waste, pine needle soil, vermiculite, leaf mold, and bone meal, add water to Chlorella to prepare Chlorella liquid, after the ratio is completed, spray EM bacteria to avoid direct contact between EM bacterial agent and saline-alkali soil, which may cause the bacteria to be killed by salt, apply the improver and mix it with the saline-alkali soil, and then pour in the Chlorella liquid.

[0044] Example 2

[0045] Take 600g of raw materials: agricultural waste, 600g of pine needle soil, 150g of vermiculite, 150g of leaf mold, 1.1L of Chlorella, 37g of bone meal, and 1.1L of EM bacterial agent. Mix the agricultural waste, pine needle soil, vermiculite, leaf mold, and bone meal in proportion. Add water to Chlorella to prepare Chlorella liquid. After the proportioning is completed, spray EM bacteria to prevent the EM bacterial agent from directly contacting the saline-alkali soil and causing the bacteria to be killed by salt. After applying the improver and mixing it with the saline-alkali soil, pour in the Chlorella liquid.

[0046] Example 3

[0047] Take the raw materials of agricultural waste 1300g, pine needle soil 1300g, vermiculite 500g, leaf mold 500g, Chlorella 1.3L, bone meal 60g, and EM bacterial agent 1.3L, mix the agricultural waste, pine needle soil, vermiculite, leaf mold, and bone meal in proportion, add water to Chlorella to prepare Chlorella liquid, after the proportion is completed, spray EM bacteria to prevent the EM bacterial agent from directly contacting the saline-alkali soil and causing the bacteria to be killed by salt, apply the improver and mix it with the saline-alkali soil, and then pour in the Chlorella liquid.

[0048] Example 4

[0049] Take the raw materials of agricultural waste 1000g, pine needle soil 1000g, vermiculite 500g, leaf mold 500g, Chlorella 0.9L, bone meal 40g, and EM bacterial agent 0.9L, mix the agricultural waste, pine needle soil, vermiculite, leaf mold, and bone meal in proportion, add water to Chlorella to prepare Chlorella liquid, after the proportion is completed, spray EM bacteria to prevent the EM bacterial agent from directly contacting the saline-alkali soil and causing the bacteria to be killed by salt, apply the improver and mix it with the saline-alkali soil, and then pour in the Chlorella liquid.

[0050] The improver is used to improve saline-alkali land. The improver improves soil quality from multiple angles, including adjusting pH value, increasing fertility, optimizing soil structure, improving water retention and permeability, and improving microbial environment. The applicant tested the improved soil and tested the content of "exchangeable calcium, exchangeable magnesium; total nitrogen; total effective molybdenum; effective boron". To ensure the comprehensiveness of the improvement, the applicant tested multiple soils at different depths and locations. The testing conditions were as follows: Figure 5 :

[0051] The specific detection structure is as follows Figure 3 , Figure 4 .

[0052] Example 6

[0053] Take 37g of bone meal, 1200g each of pine needles and agricultural waste straw, 300g each of leaf mold and vermiculite, stir and mix well, spray 1 liter of diluted EM-1 bacterial agent, and water with 1 liter of OD680 Chlorella liquid.

[0054] Example 7

[0055] Take 37g of bone meal + pine needles and 750g of agricultural waste; weigh 750g of leaf mold and vermiculite respectively, stir and mix well, spray 1L of diluted EM-1 bacterial agent, and water with 1L of OD680 Chlorella liquid.

[0056] Example 8

[0057] Take 37g of bone meal, 300g of pine needles and agricultural waste, 1200g of leaf mold and vermiculite, stir and mix well, spray 1L of diluted EM-1 bacterial agent, and water with 1L of OD680 Chlorella liquid.

[0058] Example 9

[0059] 1. In order to study the effects of different treatment methods on saline-alkali land improvement and sea asparagus growth, the applicant conducted 6 experimental treatments in flower beds and fields, with 3 replicates for each treatment. The specific contents are as follows:

[0060] 1. Control 1

[0061] No treatment: This treatment group received no treatment, did not plant sea asparagus, and was irrigated only with fresh water. This served as a blank control to observe the effect of fresh water irrigation alone on saline-alkali land leaching.

[0062] 2. Control 2

[0063] Single-plant sea asparagus: This treatment group only planted sea asparagus and irrigated with fresh water only to observe the effects of saline-alkali land leaching and halophytes.

[0064] 3. Control 3

[0065] Existing patented technology improver: The treatment group applied fermented pig manure, cow manure, and chicken manure (ratio 2:2:1) as organic fertilizer, 3 kilograms per square meter, and planted sea asparagus to observe the effect of this patented method on the improvement of saline-alkali land.

[0066] 4. Control 4 (Example 6 Ratio Improver)

[0067] The formula group materials of Example 6 were used as the improver, 80% water-retaining material + 20% water-permeable material + EM bacteria: 3 kg / m2 of the improver was mixed into the soil at a depth of 0-30 cm in the treatment group. The improver consisted of 80% water-retaining material, 20% water-permeable material and EM bacteria, and sea asparagus was planted in combination to observe the effect of this improver on the improvement of saline-alkali land and the growth of sea asparagus.

[0068] 5. Control 5 (Example 7 Ratio Improver)

[0069] The formula of Example 7 was used as an improver, 50% water-retaining material + 50% water-permeable material + EM bacteria: This treatment group was similar to Group 4, but the ratio of water-retaining material to water-permeable material in the improver was adjusted to 50:50, and sea asparagus was also planted.

[0070] 6. Control 6 (Example 8 Ratio Improver)

[0071] The formula of Example 8 was used as an improver, 20% water-retaining material + 80% water-permeable material + EM bacteria: This treatment group was similar to Group 4, but the ratio of water-retaining material to water-permeable material in the improver was adjusted to 20:80, and sea asparagus was also planted.

[0072] Through the above six different treatment methods, we can compare and analyze the effects of different treatments on the improvement of saline-alkali land and the growth of sea asparagus, thus providing a scientific basis for the management of saline-alkali land and the cultivation of sea asparagus.

[0073] Table 1 is the experimental treatment details

[0074]

[0075] Table 2 Focus indicators

[0076]

[0077]

[0078] 2. Test process

[0079] The experiment collected background values ​​of flower bed soil at the end of March, which was used to determine the soil type of this application and compare the differences in indicators of the native habitat of sea asparagus. Dry season samples of each treatment were collected in mid-May, and the flower bed soil samples were commissioned to Shipu Testing for measurement; and the test field samples were commissioned to Yijing Testing for measurement.

[0080] 3. Test results

[0081] Background value results in March

[0082]

[0083]

[0084] Field soil data in mid-May 2024

[0085]

[0086]

[0087]

[0088]

[0089] 4. Analysis of flower bed soil results

[0090] 1. The influence of modifier addition on saline-alkali related indicators

[0091] (1) pH value and conductivity

[0092] After planting sea asparagus alone, the soil pH value was lower than that without seedlings and the background value. Adding the amendment and the organic fertilizer of the present application further reduced the soil pH value, among which the permeable treatment and the permeable water retention treatment of 50% each had the best effect. The possible reason is that leaf mold and pine needle soil contain rich organic acids, which reduce the soil pH; in addition, the increase in permeability increases the elution of alkaline cations such as Na+, Mg2+, and K+ to a certain extent, and acidic cations such as H+ and Al3+ are more easily replaced, resulting in acidic soil.

[0093] Li Ming et al. (2015) pointed out that the addition of acidic organic matter such as pine needle soil can significantly reduce the soil pH. This is due to the acidity of these materials themselves and the organic acids produced during the decomposition process, which is consistent with the results of this experiment.

[0094] Cause analysis Source: Li Ming, Chen Li. (2015). Regulating effect of pine needle soil on soil pH. Soil and Fertilizer Science, 47(2), 34-40.

[0095] The conductivity of the dry season samples collected in May was significantly higher than the background value in March. The addition of the organic fertilizer and the test modifier reduced the soil conductivity, and the modifier reduced it by a larger margin. This may be because the decomposition of rice straw, leaf mold, pine needle soil, etc. releases organic acids, increases soil organic matter, improves soil structure, and promotes salt movement and leaching, thereby reducing conductivity.

[0096] Qadir's research found that adding organic matter can significantly reduce soil conductivity by improving soil structure and enhancing salt leaching capacity, which is consistent with the results of this experiment.

[0097] Cause analysis source: Qadir, M., Noble, AD, Schubert, S., Thomas, RJ, & Arslan, A. (2006). Sodicity-induced land degradation and its sustainable management: Problems and prospects. Land Degradation & Development, 17 (6), 661-676.

[0098] (2) Exchangeable sodium, cation exchange capacity and ESP

[0099] After adding the amendment, the exchangeable sodium showed a downward trend. The speculated reason is that on the one hand, the calcium ions in bone meal can replace the sodium ions on the soil exchange sites. Since calcium ions carry two positive charges, they are more easily fixed by soil particles than sodium ions, which reduces the exchangeable sodium content of the soil and improves the stability of the soil structure. In addition, the added straw, leaf mold, pine needles and vermiculite increase the organic matter in the soil, decompose and release organic acids, and promote the dissolution and leaching of sodium ions.

[0100] Su et al. (2014) used bone meal as a calcium source in a study on saline-alkali land management and proved that calcium ions effectively reduced the exchangeable sodium content in the soil through the ion exchange mechanism and improved the pH and conductivity of the soil, which is consistent with the results of this experiment.

[0101] Cause analysis source: Su, J., Zhang, W., & Gao, Y. (2014). Effects of bonemeal application on oil properties and crop yield in saline-sodic oils. Journal of Environmental Management, 144, 7-14.

[0102] After adding the amendment, the cation exchange capacity showed an upward trend compared with the control. It is speculated that the organic matter-rich materials such as rice straw, leaf mold and pine needle soil in the amendment have high cation exchange capacity, and the calcium ions in the bone meal have strong cation exchange capacity; secondly, there are a large number of negative charge sites in the large number of layered silicate minerals in vermiculite, which can significantly increase the soil CEC. The research of Qadir (2006) and Li (2008) showed that the addition of organic matter significantly increased the cation exchange capacity of the soil; the addition of organic matter and mineral materials can improve the soil structure and increase the cation exchange capacity of the soil.

[0103] Source of cause analysis: ①Qadir, M., Noble, AD, Schubert, S., Thomas, RJ, & Arslan, A. (2006). Sodicity-induced land degradation and its sustainable management: Problems and prospects. Land Degradation & Development, 17 (6), 661-676.

[0104] ②Li, S., Zhang, B., & Wang,

[0105] Alkalinity ESP is the ratio of exchangeable sodium to cation exchange capacity. Through calculation, the change trend of ESP is consistent with that of exchangeable sodium. The organic fertilizer of this application and the improver of this test can reduce the ESP of the soil of this application to less than 20%, among which the permeable treatment can reduce the ESP to less than 15%. Combined with the conductivity analysis and the saline-alkali land classification standard, the treatments without seedlings and single sea asparagus belong to severe (III) grade salinized sodium soil; after adjustment, the organic fertilizer control of this application belongs to moderate (II) grade salinized sodium soil; this water-retaining improver belongs to moderate (II) grade saline soil; this permeable improver belongs to mild (I) grade salinized-sodium soil; the improver with 50% permeability and water retention belongs to mild (I) grade sodium soil, and the sustainability of the results still needs to be observed in the future.

[0106] (3) Exchangeable potassium and magnesium

[0107] After adding the amendments, there was no obvious pattern in the changes of exchangeable potassium; after planting sea asparagus and combining sea asparagus with various amendments, the exchangeable magnesium in the soil showed an increasing trend. No relevant research and mechanism have been found yet, and samples will be collected later to conduct a comprehensive analysis of the situation.

[0108] 2. Effect of amendment addition on nutrient-related indicators

[0109] (1) Total nitrogen and available nitrogen

[0110] After adding the amendment, the total nitrogen index did not change significantly, but the effective nitrogen increased significantly. The possible reason is that although the addition of rice straw, pine needle soil, leaf humus, etc. is rich in organic matter and nitrogen, and can be decomposed by microorganisms through the added EM bacteria, the degree of decomposition in a short period of time has not yet reached the level that causes changes in the total amount of total nitrogen. It only promotes the mineralization and nitrification of nitrogen to a certain extent, converts organic nitrogen into inorganic nitrogen, and increases the content of effective nitrogen. The significant changes in total nitrogen caused by the decomposition of added organic matter take longer to appear.

[0111] The research of Li Wenhua (2012) and others showed that after adding organic matter amendments, the total nitrogen content of the soil did not change significantly, but the available nitrogen increased significantly; the research of Wang Lei et al. (2015) found that after applying organic fertilizer and returning straw to the field, the total nitrogen content did not change significantly, but the available nitrogen increased significantly, which is consistent with the results of this experiment.

[0112] Cause analysis Source: ① Li Wenhua, Wang Lei, Chen Min. (2012). Effects of organic matter amendments on soil nitrogen forms. Journal of Agro-Environment Science, 31(4), 45-50.

[0113] ②Wang Lei, Li Qiang, Zhang Wei. (2015). Effects of organic fertilizer and straw return on soil nitrogen availability. Soil and Fertilizer Science, 47(3), 67-73.

[0114] 2. Available phosphorus and exchangeable calcium

[0115] After adding the amendment, the available phosphorus in the control without seedlings was lower than the background value. The possible reason is that before sowing sea asparagus, the flower bed was watered and the available phosphorus was leached into the lower soil. After adding the amendment, the available phosphorus and exchangeable calcium showed an upward trend compared with the control, which is presumably due to the release of calcium and phosphorus in the bone meal.

[0116] The research by Wang Xue et al. (2015) showed that bone meal can significantly increase the calcium and phosphorus content in the soil, improve soil fertility and plant growth environment, which is consistent with the results of this experiment.

[0117] Cause analysis Source: Wang Xue, Zhang Wei, Li Chun. (2015). Research on the effect of bone meal on soil calcium and phosphorus content and its improvement Research .Soil and Fertilizer Science, 49(3), 67-72

[0118] 3. Organic matter and bulk density

[0119] After adding the amendment, the organic matter showed an upward trend, and the organic fertilizer control of this application also increased the soil organic matter. It is speculated that the rice straw, leaf mold, pine needle soil in this amendment and the organic fertilizer of this application (pig manure, cow manure, chicken manure 2:2:1) are all rich in organic matter.

[0120] The bulk density showed a downward trend compared with the control, and decreased with the increase in the proportion of permeable materials. The possible reason is that the density of organic materials such as straw, pine needle soil, and leaf mold in this amendment is relatively low. After mixing into the soil, it will reduce the overall density of the soil, thereby reducing the soil bulk density; in addition, the organic matter in the amendment increases the soil's granular structure, making the soil more loose and porous, thereby reducing the soil's bulk density.

[0121] Li Qiang et al. (2016) found that the addition of organic matter (such as straw and leaf mold) significantly increased the soil organic matter content, mainly due to the direct contribution of organic matter and the enhancement of microbial activity.

[0122] Research by Zhang Wei et al. (2018) showed that adding organic amendments (such as rice straw and pine needle soil) significantly reduced soil bulk density, improved water retention and aeration, and was conducive to increasing root and microbial activity.

[0123] Cause analysis Source: ① Li Qiang, Zhang Wei. (2016). Effect of organic matter on soil organic matter content. Agricultural Science Research, 34(2), 45-50.

[0124] ② Zhang Wei, Li Zhiqiang. (2018). Effects of organic amendments on soil physical properties. Soil and Fertilizer Science, 50(1), 34-39.

[0125] 4. Effective state of trace elements

[0126] After adding the amendment, the available boron, available iron and available manganese showed an increasing trend compared with the control, while the available molybdenum showed a decreasing trend; the possible reason is that leaf mold and pine needle soil lower the pH of the soil, and boron, manganese and iron elements are more active under acidic conditions, while molybdenum is unstable under acidic conditions and molybdate is easily fixed.

[0127] There was no significant difference in available copper. The possible reason is that copper is easily adsorbed and fixed by organic matter in the soil and is not easy to move and dissolve.

[0128] The trend of available zinc was basically consistent with that of available phosphorus, showing a positive correlation. It is speculated that bone meal also contains a small amount of zinc.

[0129] Chen Li (2016), Wang Lei (2018), and Zhao Min (2017) investigated the effect of soil pH on the effectiveness of trace elements and explored the changing patterns of the above elements under different pH conditions, which is consistent with the results of this experiment.

[0130] Cause analysis Source: Chen Li, Zhao Min. (2016). Effects of soil pH on plant trace element absorption. Agricultural Science Research, 35(4), 67-73.

[0131] 5. Field Soil Results Analysis

[0132] Comprehensive analysis of electrical conductivity and ESP shows that the organic fertilizer of this application, the water-retention treatment of this amendment, and the water-retention and water-permeability treatment of 50% each can reduce the electrical conductivity to below 4; the water-permeability treatment of this amendment and the water-retention and water-permeability treatment of 50% each can reduce the soil ESP to below 20%, among which water-retention and water-permeability treatment of 50% each can reduce it to below 15%. According to the saline-alkali land classification standard, unplanted seedlings and single-planted sea asparagus belong to severe (III) grade salinization-sodic soil, the organic fertilizer control of this application belongs to moderate (II) grade sodic soil, water-retention treatment belongs to moderate (II) grade salinization-sodic soil, water-permeability treatment belongs to mild (I) grade saline soil, and water-retention and water-permeability treatment of 50% each can restore the saline-alkali land to non-saline-alkali soil. The sustainability of the improvement effect needs to be continuously observed in the future.

[0133] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. The various components mentioned in the present invention are common technologies in the existing field. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only to illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A new type of saline-alkali land improver, characterized in that Including agricultural waste, pine needle soil, vermiculite, leaf mold, chlorella, bone meal, EM bacterial agent, the mass ratio is: 1-13：1-13:1-5:1-5：8-13:0.1-0.6:8-13。 2. A novel saline-alkali land improving agent according to claim 1, characterized in that The agricultural waste includes plant waste, animal waste and crop residues.

3. A novel saline-alkali land improving agent according to claim 1, characterized in that Plant waste includes corn stalks, rice straw, cotton stalks, wheat straw, and the remaining parts of bean pods.

4. A novel saline-alkali land improving agent according to claim 1, characterized in that Animal waste includes livestock and poultry manure, livestock and poultry carcasses, and veterinary waste.

5. A novel saline-alkali land improving agent according to claim 1, characterized in that Crop residues include peels, cores, shells, leaves, roots, and branches.

6. A novel saline-alkali land improving agent according to claim 1, characterized in that Agricultural waste: water permeable to prevent salt return, decompose to provide organic matter to improve soil structure, easy to obtain, and realize resource utilization of agricultural waste; Pine needle soil: large particles, permeable and anti-salt, decomposes and provides organic matter; Vermiculite: It has good water holding capacity and permeable flake structure, and is a carrier of soil nutrients and flora, improving water retention and ventilation; Leaf mold: It has water retention, prevents evaporation and salt precipitation, decomposes to provide organic matter and organic acid, alleviates soil alkalinization, and has low price; Chlorella: The algae used in this application to extract compounds are rich in nutrients, organic acids, improve soil structure, fertility, increase soil permeability and looseness, are conducive to root expansion, and increase soil crusting, affecting plant germination and emergence rates; Bone meal: rich in calcium, phosphorus, and potassium. Calcium can alleviate the toxicity of salt and sodium ions; phosphorus and potassium promote plant growth and jointing; EM bacterial agent: beneficial microbial community, solves the problem of reduced microbial diversity in saline-alkali land, ammonia-fixing bacteria, phosphate-solubilizing bacteria, photosynthetic bacteria, actinomycetes, based on other materials of improvers to restore the soil microbial flora of saline-alkali land, effectively decompose nutrients in the soil that cannot be directly used by plants, and improve the sustainability of saline-alkali land management.

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