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CN-122010636-A - Organic fertilizer for promoting plant root growth and preparation method thereof

CN122010636ACN 122010636 ACN122010636 ACN 122010636ACN-122010636-A

Abstract

The invention discloses an organic fertilizer for promoting plant root growth and a preparation method thereof, and relates to the technical fields of agricultural planting and fertilizer processing. The organic fertilizer for promoting plant root growth comprises, by mass, 60-80 parts of a fermented organic matrix, 5-15 parts of mineral source potassium fulvate, 3-8 parts of an enzymatic seaweed extract, 5-10 parts of composite amino acid powder, 0.05-0.5 part of a root growth promoting factor, 0.5-2 parts of a microbial agent and 2-5 parts of a binder. According to the invention, the indole derivative with a specific structure is adopted as a core component, and the special side chain and functional group design in the molecule is utilized, so that the chemical stability is enhanced, and the indole derivative is not easy to thermally decompose in the processing procedures of fertilizer granulation, drying and the like.

Inventors

  • ZENG XIAOXIA
  • LI ZHI
  • YANG LIANFANG
  • PU KUI
  • LI JUE
  • ZHANG KEXU

Assignees

  • 四川中农润泽生物科技有限公司

Dates

Publication Date
20260512
Application Date
20260413

Claims (10)

  1. 1. The organic fertilizer for promoting plant root growth is characterized by comprising the following raw materials in parts by mass: 60-80 parts of fermented organic matrix; 5-15 parts of mineral source potassium fulvate; 3-8 parts of enzymatic hydrolysis seaweed extract; 5-10 parts of compound amino acid powder; 0.05-0.5 part of root growth promoting factor; 0.5-2 parts of microbial agent; 2-5 parts of a binder; The root growth promoting factor is 3- (3- ((carboxymethyl) amino) -3-oxo-propyl) -1H-indole-5-carboxylic acid.
  2. 2. The organic fertilizer for promoting plant root growth according to claim 1, wherein the fermented organic substrate is selected from one or more of fermented sheep manure, fermented soybean meal, fermented mushroom dregs, fermented cow manure, and fermented chicken manure, and has a water content of 20-30%.
  3. 3. The organic fertilizer for promoting plant root growth according to claim 1, wherein the mineral source potassium fulvate is mineral source potassium fulvate powder with a fulvic acid content of more than 50%; the enzymatic hydrolysis seaweed extract is selected from one or more of Ascophyllum nodosum enzymatic hydrolysis extract, sargassum enzymatic hydrolysis extract and kelp enzymatic hydrolysis extract.
  4. 4. The organic fertilizer for promoting plant root growth according to claim 1, wherein the compound amino acid powder is prepared by mixing glutamic acid, aspartic acid, leucine and lysine according to a mass ratio of 3-4:2-3:1-2:1-2.
  5. 5. The organic fertilizer for promoting plant root growth according to claim 1, wherein the microbial agent is one or more selected from the group consisting of bacillus subtilis powder, bacillus amyloliquefaciens powder, trichoderma harzianum powder and paenibacillus mucilaginosus powder, and the effective viable count is more than 20 hundred million per gram; the binder is one or more selected from bentonite, kaolin and sodium carboxymethyl cellulose.
  6. 6. A method for preparing an organic fertilizer for promoting plant root growth according to any one of claims 1 to 5, comprising the steps of: firstly, preparing a premix, namely mixing a root growth promoting factor with composite amino acid powder to obtain a primary premix, and then mixing the primary premix with an enzymatic hydrolysis seaweed extract and a mineral source potassium fulvate to obtain a secondary premix; step two, matrix treatment and mixing, namely crushing the fermented organic matrix, then sending the crushed fermented organic matrix into a mixer, adding the secondary premix and the binder prepared in the step one, and uniformly stirring to obtain a mixed material; Granulating and drying, namely granulating the mixed material obtained in the step two, and sending the prepared granules into a dryer for drying until the water content of the granules is 15-20%; cooling and inoculating, namely cooling the dried particles to normal temperature which is not higher than 35 ℃, attaching microbial agents to the surfaces of the particles in the cooling process or after cooling, and sieving to obtain the organic fertilizer for promoting plant root growth; wherein the adhesive is mixed with water of 0.8-1.2 times of the mass of the adhesive before being added, and the mixture is added after being prepared into wet powdery adhesive.
  7. 7. The method for preparing an organic fertilizer for promoting plant root growth according to claim 6, wherein in the first step, the root growth promoting factor and the compound amino acid powder are put into a high-speed mixer and mixed for 10-15 minutes at a rotation speed of 500-800 rpm, and when the primary premix is mixed with the enzymatic seaweed extract and the mineral source potassium fulvate, the primary premix is mixed for 15-20 minutes at a rotation speed of 300-500 rpm.
  8. 8. The method for preparing organic fertilizer for promoting plant root growth according to claim 6, wherein in the second step, the fermented organic substrate is crushed to 40-60 mesh sieve, and the mixing time is 20-30 minutes, and in the third step, the drying air inlet temperature is 60-80 ℃, and the discharging temperature is 40-50 ℃; in the third step, the microbial agent is sprayed and inoculated in a form of bacterial suspension when the particles are cooled to 25-35 ℃, wherein the bacterial suspension is obtained by mixing the microbial agent and sterile water according to the mass ratio of 1 (5-10), and the spraying amount is 5-10L per 100kg of particles.
  9. 9. The method for preparing an organic fertilizer for promoting plant root growth according to claim 6, wherein the preparation method of the fermented organic substrate comprises the steps of mixing raw materials, adjusting the carbon nitrogen ratio to 25-30:1, adjusting the water content to 50-60%, adding an organic material decomposition agent with the mass of 0.1-0.2% for composting fermentation, keeping the temperature of the composting fermentation for 5-7 days when the temperature of the composting fermentation rises to 55-65 ℃, turning the composting fermentation once every 2-3 days, aging for 5-7 days after the fermentation is finished, and crushing to obtain the organic fertilizer.
  10. 10. The method for preparing the organic fertilizer for promoting plant root growth according to claim 6, wherein the preparation method of the enzymatic hydrolysis seaweed extract is characterized in that seaweed is washed, decontaminated, crushed, added with water, ground into slurry, pH is adjusted to 6.5-7.5, a complex enzyme preparation containing cellulase, algin lyase and protease is added, enzymatic hydrolysis is carried out for 3-5 hours at 45-50 ℃, and enzymatic hydrolysis liquid is obtained by 90 ℃ enzyme deactivation, filtration, centrifugation and spray drying.

Description

Organic fertilizer for promoting plant root growth and preparation method thereof Technical Field The invention relates to the technical field of agricultural planting and fertilizer processing, in particular to an organic fertilizer for promoting plant root growth and a preparation method thereof. Background The plant root system serves as a core organ for crop growth, not only bears the mechanical function of a fixed plant, but also is a main portal for soil moisture and mineral nutrition absorption. The development of root architecture is directly related to the overground growth vigor, stress resistance and final yield and quality of crops. In the modern agricultural production practice, organic fertilizers are widely adopted because of their ability to improve soil physicochemical properties and regulate rhizosphere microecological environments. The traditional organic fertilizer is usually compounded by fermenting an organic matrix, humic acid substances, amino acids, microbial agents and the like, and can provide nutrients and improve soil environment to a certain extent, but has a mild germination induction effect on plant roots, particularly lateral roots and adventitious roots, and a long acting period, so that the urgent requirement of crops on rapid construction of the roots in a transplanting period or a seedling period is often difficult to meet. To remedy this drawback, prior art solutions often attempt to add exogenous root growth promoting factors to organic fertilizers, mainly involving synthetic auxin modulators or analogues thereof, such as indoleacetic acid, indolebutyric acid or naphthylacetic acid, etc. Although these conventional growth regulators show the function of promoting cell division and elongation in laboratory environments, they have revealed significant technical drawbacks in fertilizer industrial production and field applications. Firstly, the traditional indole auxin has relatively unstable chemical property and poor thermal stability, and is extremely easy to be subjected to oxidative decomposition in the processing procedures of high-temperature granulation, drying and the like of the organic fertilizer, so that the content of active ingredients in the finished fertilizer is greatly attenuated. Secondly, when such fertilizers are applied to the soil, conventional regulators are susceptible to rapid degradation by the pH value of the soil, light and oxidase secreted by rhizosphere microorganisms, have short half-life in the soil, and are difficult to maintain long-acting and stable stimulation concentration around the root system. In addition, the biological activity threshold of some general-purpose regulators is narrow, and if the dosage is increased in order to pursue quick-acting property, imbalance of hormone balance in plants is extremely easy to cause negative effects such as inhibition of growth and even phytotoxicity. In summary, the organic fertilizer for promoting plant root growth in the prior art is limited by the chemical structure characteristics of the active factors adopted, and generally has the problems of poor processing stability, short field duration and low bioavailability. Therefore, developing a novel root growth promoting component which has stable chemical property, high processing temperature resistance, soil enzymolysis resistance and high biological activity, and scientifically compounding the novel root growth promoting component with an organic nutrient matrix to realize efficient and durable induction of plant root growth is a technical problem to be solved in the field at present. Disclosure of Invention The invention aims to provide an organic fertilizer for promoting plant root growth and a preparation method thereof, and aims to solve the technical problems that in the prior art, the root growth promoting factors are unstable in chemical property, easy to oxidize and decompose, short in lasting period and low in bioavailability, so that the effect of the fertilizer for promoting the growth of crop root system is not obvious and durable. In order to achieve the above purpose, the present invention adopts the following technical scheme: The invention provides an organic fertilizer for promoting plant root growth, which comprises the following raw materials in parts by mass: 60-80 parts of fermented organic matrix; 5-15 parts of mineral source potassium fulvate; 3-8 parts of enzymatic hydrolysis seaweed extract; 5-10 parts of compound amino acid powder; 0.05-0.5 part of root growth promoting factor; 0.5-2 parts of microbial agent; 2-5 parts of binder. Further, the root growth promoting factor is 3- (3- ((carboxymethyl) amino) -3-oxopropyl) -1H-indole-5-carboxylic acid. Further, the fermentation organic matrix is selected from one or more of fermented sheep manure, fermented soybean meal, fermented mushroom fungus dreg, fermented cow manure and fermented chicken manure, and the water content is controlled at 20-30%. Further, the preparat