Soil conditioner for desert and preparation method thereof

Abstract

The invention discloses a desert soil conditioner and a preparation method thereof, and relates to the technical field of soil improvement. The desert soil conditioner is prepared from the following raw material components in parts by mass: 1 to 2 parts of compound bacteria, 8 to 10 parts of silkworm chrysalis meal, 20 to 35 parts of humic acid, 15 to 23 parts of stipa capillata leavening, 8 to 20 parts of turf, 15 to 25 parts of soybean meal, 5 to 7 parts of yarrow root extract, 8 to 10 parts of sawdust, 25 to 30 parts of water absorbent and 15 to 28 parts of diatomite. The compound bacteria are mixed bacteria of candida utilis and bacillus megatherium in a mass ratio of 1: (1.5-2). The soil conditioner for the desert is simple in preparation method, green and environment-friendly, has remarkable sand stabilization and desert soil improvement effects, and has important application in the aspects of improving the survival rate of desertification plants and improving the desert greening effect.

Description

Technical Field

[0001] The invention relates to the technical field of soil improvement, in particular to a desert soil improver and a preparation method thereof. Background Art

[0002] Desertification has become a global environmental governance problem. Due to the special geographical environment of desert areas, desertified soil has poor water holding capacity and is somewhat sandy, making prevention and control very difficult. Desert soil improvement is complex and challenging.

[0003] Desert greening is a common technology for desert soil improvement. It is to plant sand-loving plants in the desert to fix sand and green the land. As the plants grow, their roots continue to grow in the soil, thus achieving the effect of desert soil improvement. However, due to the dry and rainy climate conditions in desert areas, coupled with soil sandification and low fertility, the effect of desert greening is not ideal.

[0004] Using soil conditioners to improve desertified soil, while fixing sand, improving soil fertility and thus ensuring the survival rate of plants is an advantageous means of improving desert soil. Summary of the invention

[0005] The purpose of the present invention is to provide a desert soil conditioner and a preparation method thereof, so as to solve the problems existing in the above-mentioned prior art and realize the improvement of desert soil while achieving sand fixation.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] The present invention provides a desert soil conditioner, the raw materials of which include the following components in parts by weight:

[0008] 1-2 parts of composite bacteria, 8-10 parts of silkworm pupa powder, 20-35 parts of humic acid, 15-23 parts of Stipa fermentation product, 8-20 parts of peat, 15-25 parts of soybean meal, 5-7 parts of Achillea root extract, 8-10 parts of sawdust, 25-30 parts of water absorbent, and 15-28 parts of diatomaceous earth;

[0009] The composite bacteria is a mixed bacteria of Candida utilis and Bacillus megaterium in a mass ratio of 1:1.5-2.

[0010] As a further preferred embodiment of the present invention, the water absorbing agent is sodium polyacrylate.

[0011] Furthermore, the method for preparing the Stipa fermentation product comprises the following steps:

[0012] The Stipa was crushed, and Bacillus amyloliquefaciens was added for fermentation. The obtained fermentation liquid was concentrated under reduced pressure, centrifuged and dried to obtain the Stipa fermentation product.

[0013] Furthermore, the fermentation temperature is 36-37.5°C, and the fermentation time is 48-72h.

[0014] Furthermore, the preparation method of the Achillea millefolium root extract comprises the following steps:

[0015] The Achillea millefolium root is decocted with water, and the obtained decoction is concentrated and dried to obtain the Achillea millefolium root extract.

[0016] The present invention also provides a method for preparing the above-mentioned desert soil conditioner, comprising the following steps: mixing the raw materials according to a mass ratio to obtain the desert soil conditioner.

[0017] The present invention uses a compound of Candida utilis and Bacillus megaterium as desert soil improving bacteria, mixes a fermentation product obtained by fermenting the forage plant Stipa grass and an Achillea millefolium root extract with desert soil improving raw material components, and on the basis of meeting the metabolic requirements of the compound bacteria, utilizes the improvement effects of the metabolic products and nutritional components of the compound bacteria to achieve significant desert soil fixation and soil improvement effects.

[0018] Different compound strains combined with different nutrients produce different microbial metabolites. The present invention combines desert soil improvement components with specific compound strains to comprehensively achieve the technical effects of sand fixation and desert soil improvement, thereby ensuring the survival rate of plants in desert areas.

[0019] The present invention further provides application of the above-mentioned desert soil improver in desert soil improvement.

[0020] Furthermore, the desert soil conditioner is spread on desert soil, accompanied by water spraying during the spreading process.

[0021] Furthermore, during the application process, the spreading amount of the desert soil conditioner is 140-160 kg / mu, and the water spraying amount is 5-6 t / mu.

[0022] The present invention discloses the following technical effects:

[0023] The desert soil conditioner of the present invention has a simple preparation method, is green and environmentally friendly, has significant sand fixation and desert soil improvement effects, and has important applications in improving the survival rate of desertified plants and desert greening effects. DETAILED DESCRIPTION

[0024] Various exemplary embodiments of the present invention will now be described in detail. This detailed description should not be considered as limiting the present invention, but should be understood as a more detailed description of certain aspects, features, and embodiments of the present invention.

[0025] It should be understood that the terms described in the present invention are only for describing a particular embodiment and are not intended to limit the present invention. In addition, for the numerical range in the present invention, it should be understood that each intermediate value between the upper and lower limits of the scope is also specifically disclosed. The intermediate value in any stated value or stated range, and each smaller range between any other stated value or intermediate value in the described range is also included in the present invention. The upper and lower limits of these smaller ranges can be independently included or excluded in the scope.

[0026] Unless otherwise indicated, all technical and scientific terms used herein have the same meanings as those generally understood by those skilled in the art. Although the present invention describes only preferred methods and materials, any methods and materials similar or equivalent to those described herein may also be used in the implementation or testing of the present invention. All documents mentioned in this specification are incorporated by reference to disclose and describe the methods and / or materials associated with the documents. In the event of a conflict with any incorporated document, the content of this specification shall prevail.

[0027] It will be apparent to those skilled in the art that various modifications and variations may be made to the specific embodiments of the present invention description without departing from the scope or spirit of the present invention. Other embodiments derived from the present invention description will be apparent to those skilled in the art. The present invention description and examples are exemplary only.

[0028] The words “include,” “including,” “have,” “contain,” etc. used in this document are open-ended terms, meaning including but not limited to.

[0029] In the following examples and comparative examples of the present invention, Candida utilis was purchased from China Center for Type Culture Collection with a collection number of CCTCC NO: M 2015694; Bacillus megaterium was purchased from China General Microbiological Culture Collection Center with a collection number of CGMCC No. 23477; and Bacillus amyloliquefaciens was purchased from China General Microbiological Culture Collection Center with a collection number of CGMCC No. 10727.

[0030] Example 1

[0031] The mass proportions of the raw materials of the desert soil conditioner in this embodiment are as follows:

[0032] 1 part of composite bacteria, 9 parts of silkworm pupa powder, 35 parts of humic acid, 20 parts of Stipa fermentation product, 16 parts of peat, 20 parts of soybean meal, 6 parts of Achillea root extract, 9 parts of sawdust, 28 parts of sodium polyacrylate, and 25 parts of diatomaceous earth.

[0033] The composite bacteria is a mixture of Candida utilis and Bacillus megaterium in a mass ratio of 1:2.

[0034] Preparation of soil conditioner for desert:

[0035] (1) crushing Stipa, adding Bacillus amyloliquefaciens, fermenting at 37.5° C. for 3 days, concentrating the obtained fermentation liquid under reduced pressure, centrifuging and drying to obtain Stipa fermentation product;

[0036] (2) The washed Achillea millefolium root was dried and crushed, and 10 times the weight of water was added and boiled for 3 times, each time for 30 min. The decoction was collected, concentrated and dried to obtain the Achillea millefolium root extract.

[0037] (3) After diatomaceous earth sodium polyacrylate and sawdust are mixed, peat, silkworm pupa powder, humic acid and soybean meal are added, and after the mixture is evenly mixed, Stipa fermentation product and Achillea millefolium root extract are added, and then composite bacteria are added, and after the mixture is evenly mixed, a desert soil conditioner is obtained.

[0038] Example 2

[0039] The mass proportions of the raw materials of the desert soil conditioner in this embodiment are as follows:

[0040] 2 parts of composite bacteria, 10 parts of silkworm pupa powder, 22 parts of humic acid, 15 parts of Stipa fermentation product, 20 parts of peat, 22 parts of soybean meal, 7 parts of Achillea millefolium root extract, 10 parts of sawdust, 28 parts of sodium polyacrylate, and 22 parts of diatomaceous earth.

[0041] Among them, the composite bacteria is a mixed bacteria of Candida utilis and Bacillus megaterium in a mass ratio of 1:1.8.

[0042] Preparation of soil conditioner for desert:

[0043] (1) crushing Stipa, adding Bacillus amyloliquefaciens, fermenting at 37.5° C. for 3 days, concentrating the obtained fermentation liquid under reduced pressure, centrifuging and drying to obtain Stipa fermentation product;

[0044] (2) The washed Achillea millefolium root was dried and crushed, and 10 times the weight of water was added and boiled for 3 times, each time for 30 min. The decoction was collected, concentrated and dried to obtain the Achillea millefolium root extract.

[0045] (3) After diatomaceous earth sodium polyacrylate and sawdust are mixed, peat, silkworm pupa powder, humic acid and soybean meal are added, and after the mixture is evenly mixed, Stipa fermentation product and Achillea millefolium root extract are added, and then composite bacteria are added, and after the mixture is evenly mixed, a desert soil conditioner is obtained.

[0046] Example 3

[0047] The mass proportions of the raw materials of the desert soil conditioner in this embodiment are as follows:

[0048] 1 part of composite bacteria, 9 parts of silkworm pupa powder, 30 parts of humic acid, 23 parts of Stipa fermentation product, 16 parts of peat, 23 parts of soybean meal, 7 parts of Achillea millefolium root extract, 8 parts of sawdust, 28 parts of sodium polyacrylate, and 18 parts of diatomaceous earth.

[0049] The composite bacteria is a mixture of Candida utilis and Bacillus megaterium in a mass ratio of 1:1.5.

[0050] Preparation of soil conditioner for desert:

[0051] (1) crushing Stipa, adding Bacillus amyloliquefaciens, fermenting at 37.5° C. for 3 days, concentrating the obtained fermentation liquid under reduced pressure, centrifuging and drying to obtain Stipa fermentation product;

[0052] (2) The washed Achillea millefolium root was dried and crushed, and 10 times the weight of water was added and boiled for 3 times, each time for 30 min. The decoction was collected, concentrated and dried to obtain the Achillea millefolium root extract.

[0053] (3) After diatomaceous earth sodium polyacrylate and sawdust are mixed, peat, silkworm pupa powder, humic acid and soybean meal are added, and after the mixture is evenly mixed, Stipa fermentation product and Achillea millefolium root extract are added, and then composite bacteria are added, and after the mixture is evenly mixed, a desert soil conditioner is obtained.

[0054] Example 4

[0055] The mass proportions of the raw materials of the desert soil conditioner in this embodiment are as follows:

[0056] 2 parts of composite bacteria, 9 parts of silkworm pupa powder, 32 parts of humic acid, 18 parts of Stipa fermentation product, 19 parts of peat, 24 parts of soybean meal, 7 parts of Achillea millefolium root extract, 8 parts of sawdust, 25 parts of sodium polyacrylate, and 26 parts of diatomaceous earth.

[0057] The composite bacteria is a mixture of Candida utilis and Bacillus megaterium in a mass ratio of 1:2.

[0058] Preparation of soil conditioner for desert:

[0059] (1) crushing Stipa, adding Bacillus amyloliquefaciens, fermenting at 37.5° C. for 3 days, concentrating the obtained fermentation liquid under reduced pressure, centrifuging and drying to obtain Stipa fermentation product;

[0060] (2) The washed Achillea millefolium root was dried and crushed, and 10 times the weight of water was added and boiled for 3 times, each time for 30 min. The decoction was collected, concentrated and dried to obtain the Achillea millefolium root extract.

[0061] (3) After diatomaceous earth sodium polyacrylate and sawdust are mixed, peat, silkworm pupa powder, humic acid and soybean meal are added, and after the mixture is evenly mixed, Stipa fermentation product and Achillea millefolium root extract are added, and then composite bacteria are added, and after the mixture is evenly mixed, a desert soil conditioner is obtained.

[0062] Comparative Example 1

[0063] The only difference from Example 1 is that no composite bacteria are added to the raw materials of the desert soil conditioner, and the composite bacteria are replaced by an equal amount of sodium polyacrylate.

[0064] Comparative Example 2

[0065] The only difference from Example 1 is that the Candida utilis is replaced by Bacillus megaterium (CGMCC No. 23477) of the same mass.

[0066] Comparative Example 3

[0067] The only difference from Example 1 is that the Achillea root extract is replaced with an equal mass of Stipa root extract, that is, during the Achillea root extraction process, the Achillea root is replaced with Stipa root, and the extraction process remains unchanged.

[0068] Comparative Example 4

[0069] The only difference from Example 1 is that the Stipa fermented product is replaced by an equal mass of Achillea millefolium fermented product, that is, during the preparation of the Stipa fermented product, Stipa is replaced by Achillea millefolium, and the fermentation process remains unchanged.

[0070] Effect verification example 1:

[0071] Take 24 plastic boxes with a length × width × height = 80 cm × 50 cm × 50 cm, and then fill the desert soil from the Inner Mongolia desert area into each plastic box with a filling height of 40 cm. Mark them as treatment groups 1-4 and control groups 1-4, and set up 3 parallel groups in each group.

[0072] According to the application amount of 150kg / mu, the soil conditioners of Examples 1-4 were evenly spread in the plastic boxes of treatment groups 1-4, and the soil conditioners of Comparative Examples 1-4 were evenly spread in the plastic boxes of control groups 1-4, respectively, with stirring and water spraying during spreading, and the water spraying amount was 5t / mu. On the second day after treatment, the consolidation thickness of desert soil in each group was measured, and the soil water loss rate was determined at the same time, and the water loss rate was measured every 4 days thereafter. The results are shown in Tables 1 and 2.

[0073] Table 1

[0074]

[0075] Table 2

[0076]

[0077] Wherein, water loss rate = (soil weight on the nth day - soil weight on the n+1th day) / soil weight on the nth day * 100%.

[0078] Effect verification example 2:

[0079] Several equal-sized plots were divided in the desert area of ​​Inner Mongolia, which were respectively used as treatment group AD, control group AD and blank control group. According to the application amount of 150kg / mu, the soil improvers of Examples 1-4 were evenly spread in the treatment group AD plots, and the soil improvers of Comparative Examples 1-4 were evenly spread in the control group AD plots, accompanied by stirring and water spraying, and the water spraying amount was 5t / mu. The blank control group did not spread the soil improver, but sprayed the same amount of water. Three parallel groups were set for each group.

[0080] After the treatment of each group was completed, the seeds of Astragalus membranaceus were directly sown in each treatment group plot at a sowing rate of 1 kg / mu using the traditional forage sowing method, and the seed survival rate of each group was recorded 21 days after sowing. The statistical results are shown in Table 3.

[0081] Table 3

[0082] Survival rate Treatment Group A 96.2％ Treatment Group B 95.4％ Treatment Group C 95.9％ Treatment Group D 96.1％ Control group A 58.2％ Control group B 65.3％ Control group C 67.2％ Control group D 64.7％ Blank control group 17.5％

[0083] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A soil conditioner for deserts, It is characterized in that The raw materials include the following components in parts by weight: 1-2 parts of composite bacteria, 8-10 parts of silkworm pupa powder, 20-35 parts of humic acid, 15-23 parts of Stipa fermentation product, 8-20 parts of peat, 15-25 parts of soybean meal, 5-7 parts of Achillea root extract, 8-10 parts of sawdust, 25-30 parts of water absorbent, and 15-28 parts of diatomaceous earth; The composite bacteria is a mixed bacteria of Candida utilis and Bacillus megaterium in a mass ratio of 1:1.5-2.

2. The desert soil conditioner according to claim 1, It is characterized in that The water absorbing agent is sodium polyacrylate.

3. The desert soil conditioner according to claim 1, It is characterized in that The preparation method of the Stipa fermented product comprises the following steps: The Stipa was crushed, and Bacillus amyloliquefaciens was added for fermentation. The obtained fermentation liquid was concentrated under reduced pressure, centrifuged and dried to obtain the Stipa fermentation product.

4. The desert soil conditioner according to claim 3, It is characterized in that The fermentation temperature is 36-37.5°C, and the fermentation time is 48h-72h.

5. The desert soil conditioner according to claim 1, It is characterized in that The preparation method of the Achillea millefolium root extract comprises the following steps: The Achillea millefolium root is decocted with water, and the obtained decoction is concentrated and dried to obtain the Achillea millefolium root extract.

6. A method for preparing a desert soil conditioner according to any one of claims 1 to 5, It is characterized in that The method comprises the following steps: mixing the raw materials according to a mass ratio to obtain the desert soil improver.

7. Use of the desert soil conditioner according to any one of claims 1 to 5 in desert soil improvement.

8. The use according to claim 7, It is characterized in that The desert soil conditioner is spread on desert soil, accompanied by water spraying during the spreading process.

9. The use according to claim 7, It is characterized in that During the application process, the spreading amount of the desert soil conditioner is 140-160 kg / mu, and the water spraying amount is 5-6 t / mu.

Images