Search

CN-122010643-A - Salinized sandy soil modifier and preparation method and application thereof

CN122010643ACN 122010643 ACN122010643 ACN 122010643ACN-122010643-A

Abstract

The invention discloses a salinized sandy soil modifier and a preparation method and application thereof, wherein the salinized sandy soil modifier comprises, by mass, 70-85 parts of industrial hemp degumming liquid concentrated solution, 5-8 parts of licorice extract, 8-15 parts of alfalfa extract, 8-15 parts of humus, 2-8 parts of calcium citrate and 3-10 parts of water-soluble compound fertilizer. Wherein the concentration of organic matters in the industrial hemp degumming liquid concentrated solution is not less than 12000 mg/L, and the glycyrrhizic acid content in the licorice extracting solution is not less than 7.0%. After the modifier for the salinized sand soil is applied to soil, sand grains can be quickly cemented to form aggregates, and nutrients and calcium ions can be slowly released, so that the four core problems of poor structure, low fertility, less organic matters and saline-alkali hazard of the Xinjiang saline-alkali sand soil are systematically solved, waste is changed into valuable, and the modifier is environment-friendly and is beneficial to popularization and application.

Inventors

  • SUN ZHE
  • LIU LIJUN
  • WANG ZUCHAO
  • YANG YING

Assignees

  • 石河子大学
  • 华中农业大学

Dates

Publication Date
20260512
Application Date
20260226

Claims (9)

  1. 1. The modifier for the salinized sandy soil is characterized by comprising the following preparation raw materials, by mass, 70-85 parts of industrial hemp degumming liquid concentrated solution, 5-8 parts of licorice root extract, 8-15 parts of alfalfa extract, 8-15 parts of humus, 2-8 parts of calcium citrate and 3-10 parts of water-soluble compound fertilizer; the concentration of organic matters in the industrial hemp degumming liquid concentrated solution is not less than 12000 mg/L; The glycyrrhizic acid content in the licorice extract is more than or equal to 7.0%; The concentration of free amino acid of the alfalfa extract is not less than 18 mg/mL, and the concentration of the alfalfa extract is not less than 1.5 mg/mL.
  2. 2. The modifier for salinized sandy soil according to claim 1, which comprises the following preparation raw materials, by mass, 80 parts of industrial hemp degumming liquid concentrated solution, 6 parts of licorice extract, 10 parts of alfalfa extract, 10 parts of humus, 6 parts of calcium citrate and 8 parts of water-soluble compound fertilizer.
  3. 3. The modifier for salinized sandy soil according to claim 1, wherein the water-soluble nitrogen-phosphorus-potassium compound fertilizer comprises at least one type of water-soluble compound fertilizer of 15-15-15 and 20-20-20.
  4. 4. The modifier for salinized sandy soil of claim 1, wherein the humus comprises at least one of potassium fulvate and brown humic acid as mineral source.
  5. 5. A method for preparing the modifier for salinized sandy soil according to any one of claims 1 to 4, comprising the following steps: S1, respectively preparing industrial hemp degumming liquid concentrated solution, licorice extract and alfalfa extract, and dry-mixing humus and a water-soluble compound fertilizer according to a proportion to obtain a dry mixed material; S2, mixing the dry mixed material, the industrial hemp degumming liquid concentrated solution, the liquorice extracting solution and the alfalfa extracting solution for the second time according to the proportion to obtain a blend material; And S3, slowly adding calcium citrate into the blend, and continuously stirring for 20-30 min to obtain the salinized sandy soil modifier.
  6. 6. The preparation method according to claim 5, wherein in the step S1, the specific preparation steps of the industrial hemp degumming liquid concentrate are as follows: immersing industrial hemp stalks in saline-alkali water, standing and soaking for 5-8 days at normal temperature, and stirring once a day; after the soaking is finished, solid-liquid separation is carried out by adopting a 100-mesh screen, and then the obtained liquid is decompressed and concentrated to 1/3-1/2 of the original volume under the conditions of 60-70 ℃ and minus 0.08 MPa, so that the concentrated solution of the industrial hemp degumming liquid is obtained.
  7. 7. The preparation method according to claim 5, wherein in the step S1, the specific preparation steps of the licorice extract are as follows: immersing the licorice slices in warm water at 45-50 ℃ for 2-3 hours, and carrying out countercurrent boiling extraction for 5-10 times after the immersing to obtain leaching liquid; Naturally settling the leaching solution for 2-5 hours, concentrating the supernatant into thick paste, adding ethanol to 65%, standing for 8-12 hours, and then washing with ethanol for 2-4 times to obtain a purified solution; And (3) adding water into the purified solution to dilute until the glycyrrhizic acid content is more than or equal to 7.0%, and adding ammonia solution to adjust the pH to 7.5-8.5 to obtain the licorice extract.
  8. 8. The preparation method according to claim 5, wherein in the step S1, the alfalfa extract is specifically prepared as follows: Crushing dried alfalfa with the water content less than or equal to 10% to 20-40 meshes to obtain alfalfa powder; And (3) stirring and mixing the alfalfa powder and water according to the mass ratio of 1 (10-20), wherein the stirring speed is 50-80 rpm, heating to 80-90 ℃ after uniform stirring, extracting for 1.5-2 h, and obtaining the alfalfa extract after standing and solid-liquid separation.
  9. 9. The use of the modifier for salinized sand as set forth in any one of claims 1 to 4, wherein the application amount of the modifier for salinized sand applied to the salinized sand is 6 to 10 g/kg.

Description

Salinized sandy soil modifier and preparation method and application thereof Technical Field The invention relates to the field of agricultural technology and solid fertilizer, in particular to a salinized sandy soil modifier and a preparation method and application thereof. Background At present, in Xinjiang areas, especially in southern Xinjiang, large-area salinized sand areas are distributed. The soil has the dual disadvantages of extremely poor structure, lack of sticky particles and organic matters, incapability of forming a stable aggregate structure, serious water and fertilizer leakage, high salt content, unbalanced ion proportion, high sodium ion ratio in particular, further damage to the soil structure, generation of physiological drought stress and serious restriction to agricultural production and ecological restoration. The prior art has many limitations that firstly, chemical modifying agents such as gypsum and the like can only replace sodium ions, but have little effect on increasing organic matters and improving the physical structure of sand, secondly, the cost of independently applying organic fertilizers or commercial salinized sand modifying agents is high, the chemical modifying agents are not combined with the recycling of local wastes and are difficult to popularize in a large area, thirdly, the industrial hemp degumming liquid is used as a potential resource rich in organic matters and mineral elements, and is mostly abandoned at present, the high-value utilization way is lost, and particularly, a special compound product capable of solving the multiple problems of the Xinjiang saline-alkali sand is lacked. Therefore, the development of a special salinized sand modifier which can change waste into valuable, has low cost and can synergistically improve the geographic property of the saline-alkali sand is urgent. Disclosure of Invention The invention aims to provide a salinized sandy soil modifier and a preparation method and application thereof, which are used for solving the problems that the prior art lacks an effective means capable of simultaneously realizing the increase of soil organic matters, the improvement of soil fertility and the improvement of soil aggregate structure and effectively utilizing waste industrial hemp degumming liquid. The first solution provided by the invention is a salinized sandy soil modifier, which comprises, by mass, 70-85 parts of an industrial hemp degumming liquid concentrated solution, 5-8 parts of a licorice extract, 8-15 parts of an alfalfa extract, 8-15 parts of humus, 2-8 parts of calcium citrate and 3-10 parts of a water-soluble compound fertilizer. Wherein the concentration of organic matters in the industrial hemp degumming liquid concentrated solution is not less than 12000 mg/L, the glycyrrhizic acid content in the licorice extract solution is not less than 7.0%, the concentration of free amino acid in the alfalfa extract solution is not less than 18 mg/mL, and the concentration of the alfalfa extract solution is not less than 1.5 mg/mL. In some embodiments, the salinized sandy soil modifier comprises, by mass, 80 parts of an industrial hemp degumming liquid concentrated solution, 6 parts of a licorice extract, 10 parts of an alfalfa extract, 10 parts of humus, 6 parts of calcium citrate and 8 parts of a water-soluble compound fertilizer. In some embodiments, the water-soluble nitrogen-phosphorus-potassium compound fertilizer comprises at least one type of water-soluble compound fertilizer of 15-15-15, 20-20-20. In some embodiments, the humus comprises at least one of potassium fulvate, brown humic acid, which is a mineral source. In order to solve the technical problems, a second solution provided by the present invention is a preparation method of the modifier for salinized sandy soil in the first solution, which comprises the following steps: s1, respectively preparing industrial hemp degumming liquid concentrated solution, licorice extract and alfalfa extract, and dry-mixing humus and a water-soluble compound fertilizer according to a proportion to obtain a dry mixed material. S2, mixing the dry mixed material, the industrial hemp degumming liquid concentrated solution, the liquorice extracting solution and the alfalfa extracting solution for the second time according to the proportion to obtain a blend material. And S3, slowly adding calcium citrate into the blend, and continuously stirring for 20-30 min to obtain the salinized sandy soil modifier. In some embodiments, in the step S1, the industrial hemp degumming liquid concentrated solution is specifically prepared by immersing industrial hemp stalks in saline-alkali water, standing and soaking for 5-8 days at normal temperature while stirring once a day, performing solid-liquid separation by adopting a 100-mesh screen after soaking, and concentrating the obtained liquid to 1/3-1/2 of the original volume under the conditions of 60-70 ℃ and-0.08 MPa to obtain the industrial hemp d