Corn soil conditioner

Abstract

The invention belongs to the technical field of soil conditioners, and particularly relates to a corn soil conditioner. The invention relates to a corn soil conditioner. The corn soil conditioner is prepared by mixing potassium humate and bacillus velezensis. The corn soil conditioner is formed by mixing potassium humate and bacillus velezensis according to the mass ratio of (1-5): (5-1), when the corn soil conditioner is used, the content of water-stable large aggregates of soil can be increased, meanwhile, the average weight diameter of the water-stable large aggregates of the soil can be increased, and it is indicated that the corn soil conditioner can promote formation of the soil aggregates and improve the soil quality. The soil stability and the water erosion resistance are improved, so that the soil fertility is favorably maintained, and the soil degradation is restrained.

Description

Technical Field

[0001] The present invention belongs to the technical field of soil conditioners, and particularly relates to a corn soil conditioner. Background Art

[0002] Soil aggregates are the basic units and material basis for the composition of soil structure, which determine the quality of soil structure and directly affect soil quality and production performance. Soil aggregates are the result of the synthesis of many biological, chemical, and physical processes. The relationship between the distribution ratio and size of different particle sizes of soil aggregates and soil quality is very close.

[0003] The stability of soil aggregates is commonly measured by the average weight diameter (WMD) of soil aggregates and the mass fraction of large soil aggregates (R>0.25mm). Among them, WMD can better reflect the particle size distribution characteristics of soil aggregates. The larger its value, the higher the degree of soil aggregation and the stronger the stability of aggregates. During the production process, the application of exogenous organic matter such as humate can promote the formation of large soil aggregates through its cementing effect, thereby improving soil structure, but the effect of a single exogenous organic matter is limited.

[0004] The prior art CN112979390B discloses a composition for promoting the formation of soil aggregates, which is composed of a water-soluble carbon mixture, a sugar alcohol mixture, and a liquid vegetable oil. The water-soluble mixture is a combination of humate and fulvate; the sugar alcohol mixture is a combination of mannitol and sorbitol, and the liquid vegetable oil is soybean oil. However, vegetable oil is a hydrophobic substance and cannot form a homogeneous solution with water. Even if it is temporarily mixed by stirring, it will still stratify after standing. When the oil-containing mixture passes through the drip irrigation pipeline, the oil phase is easily separated and enriched on the inner wall of the pipeline or at the drip head, hindering the flow of water and reducing the drip irrigation uniformity. Moreover, vegetable oil is rich in unsaturated double bonds and is prone to oxidative cross-linking reaction with dissolved oxygen in water. When the field temperature rises, it will accelerate the oxidation and polymerization of oil, forming a viscous sediment-like substance, resulting in drip head blockage. Summary of the Invention

[0005] The purpose of the present invention is to provide a corn soil conditioner to solve the problems existing in the prior art in the background art.

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

[0007] A corn soil conditioner is composed of potassium humate and Bacillus velezensis.

[0008] Specifically, the Bacillus velezensis is Bacillus velezensis CGMCC No.14384 with 100 billion cfu / g.

[0009] Specifically, the mixing mass ratio of potassium humate to Bacillus velezensis is 1-5:5-1.

[0010] Specifically, the mixing mass ratio of potassium humate to Bacillus velezensis is 1:3.

[0011] The present invention also provides the application of the corn soil conditioner in promoting the formation of soil aggregates.

[0012] The present invention also provides a method for promoting the formation of soil aggregates, specifically: mixing the corn soil conditioner into the soil at a ratio of 0.5-1.5% of the soil weight, and soil aggregates are formed after 15 days.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] (1) The corn soil conditioner of the present invention is composed of potassium humate and Bacillus velezensis mixed in a mass ratio of 1-5:5-1. When used, it can increase the content of water-stable large soil aggregates and at the same time increase the average weight diameter of water-stable large soil aggregates. This shows that the corn soil conditioner of the present invention can promote the formation of soil aggregates, improve soil stability and anti-hydrodynamic erosion ability, which helps to maintain soil fertility and curb soil degradation.

[0015] (2) The corn soil conditioner of the present invention has simple components and can avoid the problems brought by the use of vegetable oil. Specific embodiments

[0016] The technical solutions of the present invention patent will be described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0017] 1. Materials and methods

[0018] 1.1 Test components

[0019] 98% potassium humate (commercially available), 100 billion cfu / g Bacillus velezensis CGMCC No. 14384 (Sichuan Baishi Dongwang Biotechnology Co., Ltd.)

[0020] 1.2 Test soil conditioner

[0021] See Table 1.

[0022] Table 1 Test soil conditioner

[0023]

[0024] Mix potassium humate and Bacillus velezensis CGMCC No. 14384 evenly according to the above mass ratio to obtain the two-component soil conditioner.

[0025] 1.3 Soil samples

[0026] The soil samples were collected from the fields where corn was planted in the Mingyang Base, Guangxi Zhuang Autonomous Region. Multiple sampling points were set according to the "S" shape distribution, and the surface soil of 0 - 20 cm was collected, mixed evenly, and sieved to remove the large aggregates with a diameter of more than 2 mm. Only the soil aggregates with a diameter ≤ 5 mm, which are valuable in agriculture, were retained as the test soil.

[0027] 1.4 Test treatments

[0028] Mix the test soil and the test soil conditioner evenly according to the mass ratio of 100:1 to prepare a mixed sample with a soil conditioner addition of 1%. Take 250 g of the mixed sample in a glass bottle (diameter 9 cm), and set the treatment without adding the test soil conditioner as the blank control. Each treatment was set with 3 replicates, and each replicate had 4 glass bottles. Place the glass bottles containing the mixed samples in an incubator at 25 °C, and add sterile water during the incubation to keep the soil in the mixed samples moist. After 15 d, air-dry the mixed samples in a ventilated place for determining the soil aggregate composition.

[0029] 1.5 Determination of soil water-stable aggregates

[0030] The Elliot wet sieving method was adopted. Take 100 g of the air-dried soil sample and place it on the top layer of a set of sieves with pore sizes of 8 mm, 5 mm, 2 mm, 1 mm, 0.5 mm, and 0.25 mm in sequence. Hang the set of sieves on the oscillation rack of the soil water-stable aggregate analyzer, slowly add deionized water to submerge the soil sample, and after soaking for 5 min, set the amplitude of the instrument to 3.0 cm and vibrate vertically up and down 40 times / min for 15 min. Separate the water-stable aggregates of 5 - 2 mm, 2 - 1 mm, 1 - 0.5 mm, 0.5 - 0.25 mm, and < 0.25 mm. Wash each level of aggregates into an evaporating dish, dry to a constant weight, weigh and record, and calculate the mass percentage content of each level of aggregates.

[0031] 1.6 Calculation

[0032] Calculate the mass fraction of soil macro-aggregates (R > 0.25 mm) and the weighted mean diameter (WMD) of soil aggregates. The results are shown in Table 2 - Table 3.

[0033]

[0034] di - The average value of the upper and lower particle size limits of the i-th level of aggregates;

[0035] Wi - The particle size content of the i-th level of aggregates.

[0036] Table 2 Composition of soil water-stable aggregates after treatment with different soil conditioners (%)

[0037]

[0038] Table 3 Effects of different soil conditioners on soil structure stability

[0039]

[0040] Note: WR 0.25 is the content of soil water-stable aggregates with a diameter > 0.25; WMW is the average weight diameter of soil water-stable aggregates.

[0041] WR 0.25 The higher the value, the stronger the ability to resist water erosion; WMWD can reflect the particle size distribution characteristics of soil aggregates. The larger the value, the higher the degree of soil aggregation and the stronger the stability of aggregates.

[0042] Based on Tables 2 - 3, compared with the blank control, applying potassium humate or Bacillus velezensis alone can, to a certain extent, increase WR 0.25 and WMWD, indicating that applying potassium humate or Bacillus velezensis can promote the formation of soil aggregates, and potassium humate alone is superior to Bacillus velezensis alone.

[0043] When the two are mixed in a mass ratio of 1 - 7:7 - 1, within the range of 1 - 5:5 - 1, the effect is better than that of 1:7 or 7:1, and is significantly better than applying potassium humate or Bacillus velezensis alone. Especially when the mass ratio is 1:3, the effect is optimal. It shows that mixing potassium humate with Bacillus velezensis in a mass ratio of 1 - 5:5 - 1 in the present invention can significantly promote the formation of soil aggregates, improve soil stability, maintain soil fertility, and curb soil degradation.

[0044] In summary, mixing potassium humate with Bacillus velezensis in a mass ratio of 1 - 5:5 - 1 in the present invention can increase the content of large soil water-stable aggregates and at the same time increase the average weight diameter of large soil water-stable aggregates. This shows that the corn soil conditioner of the present invention can promote the formation of soil aggregates, improve soil stability and the ability to resist water erosion, which helps to maintain soil fertility and curb soil degradation.

[0045] The foregoing description of the specific exemplary embodiments of the present invention is for purposes of illustration and exemplification. These descriptions are not intended to limit the invention to the precise forms disclosed, and it is apparent that many modifications and variations are possible in light of the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical applications, so that those skilled in the art can implement and utilize the various different exemplary embodiments of the present invention, as well as various different selections and modifications. The scope of the present invention is intended to be defined by the claims and their equivalents.

Claims

1. A corn soil conditioner, characterized in that: The corn soil conditioner is prepared by mixing potassium humate and Bacillus Velez.

2. The corn soil conditioner according to claim 1, characterized in that The Bacillus Velez is Bacillus Velez CGMCC No.14384 with 100 billion cfu / g.

3. The corn soil conditioner according to claim 1, characterized in that The mixing mass ratio of the potassium humate to the Bacillus Velez subtilis is 1-5:5-1.

4. The corn soil conditioner according to claim 1, characterized in that The mixing mass ratio of the potassium humate to the Bacillus Velez subtilis is 1:

3.

5. Use of the corn soil conditioner according to any one of claims 1 to 4 in promoting the formation of soil aggregates.

6. A method for promoting soil aggregate formation, characterized in that: Specifically, the corn soil conditioner according to any one of claims 1 to 4 is mixed into the soil at a ratio of 0.5-1.5% of the weight of the soil, and soil aggregates are formed after 15 days.

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