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CN-121990853-A - Carbon nano fertilizer and preparation method and application thereof

CN121990853ACN 121990853 ACN121990853 ACN 121990853ACN-121990853-A

Abstract

The invention relates to the technical field of biofertilizers, in particular to a carbon nano-fertilizer which is spherical particles with surface modified porous structures, has the particle size of 3-8 nm and the surface potential of-10 to-25 mV, contains C, O, N, ca, P elements in the composition, wherein the mass ratio of Ca element is 1.5-3%, the mass ratio of P element is 0.8-1.5%, realizes synchronous improvement of foliar nutrient absorption efficiency, plant stress resistance and fruit quality, has the comprehensive advantages of strong environmental adaptability, less consumption and low cost, and provides an innovative solution for green efficient agriculture.

Inventors

  • HUANG ZHENGYI
  • HUO WENHUI
  • JIANG XINYU
  • CHEN QI
  • Zhao Yangke
  • CAI HONGYU
  • JIANG XILI
  • SHEN YING
  • WANG YAQIN

Assignees

  • 江苏怡秾怡业生态农业有限公司

Dates

Publication Date
20260508
Application Date
20250416

Claims (9)

  1. 1. The carbon nano fertilizer is characterized by being spherical particles with surface modified porous structures, the particle size is 3-8 nm, the surface potential is-10 to-25 mV, the composition of the fertilizer comprises C, O, N, ca, P elements, wherein the mass ratio of Ca elements is 1.5-3%, and the mass ratio of P elements is 0.8-1.5%.
  2. 2. The method for preparing the carbon nano fertilizer according to claim 1, comprising the following steps: s1, mixing citric acid, ethylenediamine, calcium salt and phosphorus salt with ultrapure water, and performing hydrothermal reaction for 10-14 hours at 160-220 ℃ to generate calcium-phosphorus co-doped carbon nano-cores; S2, adding polyacrylic acid, sodium alginate and chitosan into the product obtained in the step S1, and heating and modifying for 3-5 hours at 70-90 ℃; S3, adding ammonium bicarbonate, performing ultrasonic treatment, and then dialyzing and purifying; S4, loading chlorophyll derivatives and superoxide dismutase SOD into the purified solution, and freeze-drying to obtain a final product.
  3. 3. The method for preparing a carbon nano fertilizer according to claim 2, wherein the calcium salt in S1 is calcium nitrate, the phosphorus salt is monopotassium phosphate, and the molar ratio of the calcium salt to the phosphorus salt is 1.5:1-2.5:1.
  4. 4. The method for preparing the carbon nano fertilizer according to claim 2, wherein the mass ratio of the polyacrylic acid to the sodium alginate to the chitosan in the S2 is (1.2-1.8) (0.15-0.25) (0.08-0.12).
  5. 5. The method for preparing a carbon nano fertilizer according to claim 2, wherein the power of the ultrasonic treatment in S3 is 300-500W for 30-60 minutes, and the system temperature is maintained at 0-10 ℃ during the ultrasonic treatment.
  6. 6. The method for preparing the carbon nano fertilizer according to claim 2, wherein the chlorophyll derivative in S4 is sodium copper chlorophyllin, the load is 0.5% -1.5% of the total mass of the carbon nano material, and the load of the SOD enzyme is 500-1500 active units per gram of the carbon nano material.
  7. 7. The use of the carbon nano fertilizer as defined in claim 1 in melon and fruit plant cultivation.
  8. 8. The method according to claim 7, wherein the melon and fruit plant is cucumber.
  9. 9. Use according to claim 7, characterized in that it is applied during cucumber planting in any one of the following ways: (a) Preparing a carbon nano material into 0.05% -0.2% aqueous dispersion, and spraying on leaf surfaces in a cucumber flowering period for Shi Jiange-10 days; And/or (b) compounding the carbon nanomaterial and humic acid according to a mass ratio of 1:2-1:4, and applying the mixture to root soil through a drip irrigation system.

Description

Carbon nano fertilizer and preparation method and application thereof Technical Field The invention relates to the technical field of biological fertilizers, in particular to a carbon nano fertilizer and a preparation method and application thereof. Background As one of important members of the nano material family, carbon Dots (CDs) are spherical particles with the particle size smaller than 10nm, have the characteristics of good water solubility, photoluminescence, easy regulation and control, low toxicity, biocompatibility and the like, and have good application prospects in the fields of biological imaging, metal-free RTP materials, LED devices, ion detection, energy storage, anti-counterfeiting, targeted drug delivery and the like. A large number of researches show that CDs have great potential in promoting plant growth and development, regulating plant photosynthesis and improving plant stress resistance. For example, professor of the university of agricultural science, china, ruiyuquin, on month 31, 2024 published a review paper titled Effects of nanofertilizers on THE MECHANISM of photosynthetic EFFICIENCY IN PLANTS:A review on PHYTON, outlining the effects of carbon nanofertilizers on plant photosynthesis, including increasing biomass, pigment and gas openness, photosynthetic efficiency, and plant stress resistance. Meanwhile, the Chinese patent of the document No. CN115259138B discloses a method for improving drought resistance and yield of crops based on a carbon nanomaterial, which is characterized in that the carbon nanomaterial is applied to roots or leaves of the crops as a plant fertilizer, and has the technical effects of remarkably reducing accumulation of ROS in the crops under drought, avoiding oxidative damage to the crops, improving the utilization efficiency of ultraviolet light by the crops, improving photosynthesis of the crops under drought, increasing absorption of nutrients and moisture by the roots, promoting normal growth of the crops under drought, reducing yield loss of the crops and guaranteeing the quality of the crops, and the preparation method of the carbon nanomaterial comprises the following steps: Mixing 20mL of ultrapure water, 2.2g of citric acid and 670 mu L of ethylenediamine uniformly, heating at 200 ℃ for 12 hours, adding 1mL of polyacrylic acid after heating is finished and heating at 80 ℃ for 4 hours, then performing ultrasonic treatment on the product for 30 minutes by using a CNC ultrasonic machine to disperse the product in an aqueous solution, purifying the solution for 48 hours by using a dialysis bag, and finally freeze-drying the obtained mixture to obtain the carbon nanomaterial. The carbon nanomaterial is beneficial to improving the utilization efficiency of ultraviolet light for crops (soybeans), improving photosynthesis of the crops under drought, increasing the absorption of nutrients and moisture by roots, promoting the normal growth of the crops under drought, reducing the yield loss of the crops and guaranteeing the quality of the crops. But the method Disclosure of Invention In order to solve the technical problems, the invention aims to provide the carbon nano fertilizer, the preparation method and the application thereof, wherein the carbon nano fertilizer realizes synchronous improvement of foliar nutrient absorption efficiency, plant stress resistance and fruit quality, has the comprehensive advantages of strong environmental adaptability, less consumption and low cost, and provides an innovative solution for green and efficient agriculture. In order to achieve the technical effects, the invention adopts the following technical scheme: In the first aspect, the invention provides a carbon nano fertilizer which is spherical particles with surface modified porous structures, has the particle size of 3-8 nm and the surface potential of-10 to-25 mV, and comprises C, O, N, ca, P elements, wherein the mass ratio of Ca element is 1.5-3%, and the mass ratio of P element is 0.8-1.5%. In a second aspect, the present invention also provides a method for preparing the carbon nano fertilizer, which comprises the following steps: s1, mixing citric acid, ethylenediamine, calcium salt and phosphorus salt with ultrapure water, and performing hydrothermal reaction for 10-14 hours at 160-220 ℃ to generate calcium-phosphorus co-doped carbon nano-cores; S2, adding polyacrylic acid, sodium alginate and chitosan into the product obtained in the step S1, and heating and modifying for 3-5 hours at 70-90 ℃; S3, adding ammonium bicarbonate, performing ultrasonic treatment, and then dialyzing and purifying; S4, loading chlorophyll derivatives and superoxide dismutase SOD into the purified solution, and freeze-drying to obtain a final product. Preferably, the calcium salt in the S1 is calcium nitrate, the phosphorus salt is monopotassium phosphate, and the molar ratio of the calcium salt to the phosphorus salt is 1.5:1-2.5:1. Preferably, the mass ratio of the polyacryli