Preparation method of graft copolymer crop nutrient solution containing tryptophan

A graft copolymer, tryptophan technology, applied in liquid fertilizers, fertilizer mixtures, animal carcass fertilizers, etc., can solve problems such as affecting convenience, increasing costs, etc., achieving safe and efficient use, promoting crop growth, and easy equipment investment. Effect

Inactive Publication Date: 2017-06-20
YANTAI GOODLY BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Patent CN201610589592.4 relates to the preparation of a slow-release orchid rooting agent. The sodium carboxymethylcellulose in the component plays the role of thickening and slow-release; patent CN201410144280.3 uses sodium-based bentonite as a slow-release agent, aluminum sulfate (Al 2 (SO 4 ) 3 ) as a strengthening agent to prepare a rooting agent with a slow-release effect. The addition of a slow-release agent improves the fertilizer utilization rate, but also increases the cost and affects the convenience of use to a certain extent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) Add 20 times the volume of water to 50 kg of chitosan with a molecular weight of 600,000, add acid to adjust the pH value to 3.5, stir evenly, add 3 kg of liquid high-temperature amylase with an enzyme activity of 12,000 U / ml, heat the water bath to 80 ° C, and stir for 1 hour. Adjust the pH value to 7, and filter to obtain 1000L of enzymatic hydrolysis solution;

[0026] 2) Add 50kg of tryptophan, 250g of sodium bisulfite and 250g of ammonium persulfate to the enzymatic hydrolysis solution in step 1, control the reaction temperature to 70°C, the reaction time is 2.5h, cool to room temperature, take the supernatant as the reaction solution, About 950L;

[0027] 3) The reaction liquid in step 2) is subjected to nanofiltration treatment, the pore size of the nanofiltration membrane is 1000 Dalton molecular weight, and the conductivity of the permeate is lower than 3000 μs / cm, stop adding water for top washing, and collect 830 L of concentrated solution;

[0028] 4) Th...

Embodiment 2

[0032] 1) Add 25 times the volume of water to 40kg of chitosan with a molecular weight of 800,000, add acid to adjust the pH value to 4.0, stir evenly, add 2.0kg of liquid high-temperature amylase with an enzyme activity of 12,000U / ml, heat the water bath to 100°C, and stir for 1 hour , adjust the pH value to 8, and filter to obtain about 1000L of enzymolysis solution;

[0033] 2) Add 52kg of tryptophan, 182g of sodium bisulfite and 182g of ammonium persulfate to the enzymolysis solution in step 1), control the reaction temperature to 80°C, the reaction time is 3h, cool to room temperature, take the supernatant as the reaction solution, About 970L;

[0034] 3) The reaction solution in step 2) is subjected to nanofiltration treatment, the pore size of the nanofiltration membrane is 800 Dalton molecular weight, and the conductivity of the permeate is lower than 3000 μs / cm, stop adding water for top washing, and collect 780 L of concentrated solution;

[0035] 4) The concentrate...

Embodiment 3

[0039] 1) Add 30 times the volume of water to 40kg of chitosan with a molecular weight of 700,000, add acid to adjust the pH value to 5.0, stir evenly, add 3.2kg of liquid high-temperature amylase with an enzyme activity of 15,000U / ml, heat the water bath to 100°C, and stir for 1 hour , adjust the pH value to 7.5, and filter to obtain about 1200L of enzymolysis solution;

[0040] 2) Add 60kg of tryptophan, 150g of sodium bisulfite and 150g of ammonium persulfate to the enzymolysis solution in step 1), control the reaction temperature to 65°C, the reaction time is 3h, cool to room temperature, take the supernatant as the reaction solution, About 1150L;

[0041] 3) The reaction solution in step 2) is subjected to nanofiltration treatment, the pore size of the nanofiltration membrane is 900 Dalton molecular weight, and the conductivity of the permeate is lower than 3000 μs / cm, stop adding water for top washing, and collect 1030 L of concentrated solution;

[0042] 4) The concent...

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Abstract

The invention relates o a preparation method of a graft copolymer crop nutrient solution containing chitosan oligosaccharide and tryptophan. The preparation method comprises following steps: chitosan is subjected to enzymatic hydrolysis with amylase under acidic conditions, appropriate amounts of tryptophan and a initiator are added into an obtained enzymatic hydrolysate, reaction is carried out for 2 to 3h at a reaction temperature controlled to be 60 to 80 DEG C, an obtained reaction liquid is subjected to nanofiltration so as to obtain a concentrate, the concentrate is subjected to nanofiltration so as to obtain a dialysate, the dialysate is mixed with other nutrient components so as to obtain a finished product via filling. The obtained finished product is diluted with water of 100 to 500 volume times, and an obtained diluted solution is capable of promoting the growth of crop root systems obviously, and increasing crop yield.

Description

technical field [0001] The invention relates to a preparation method of a crop nutrient solution of tryptophan and chitosan oligosaccharide graft copolymer, belonging to the technical field of fertilizer production. Background technique [0002] The root-soil interface is the main channel for soil moisture and nutrients to enter the plant. The root system is the core content and material basis of the root-soil interface. Its distribution and function directly or indirectly affect the growth of the aboveground part and the survival and development of the entire plant. In the farmland soil environment where crops depend on, water and fertilizer are the factors that most frequently affect crop roots and are also the most easily controlled by humans. The development of functional fertilizers that promote root development has broad market prospects. [0003] Patents CN201510113264.2 and CN201410175483.9 relate to a preparation method of a rooting agent. The main components of the...

Claims

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Application Information

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IPC IPC(8): C05G3/00C08B37/08
CPCC05C3/00C05G5/23C08B37/003C05C11/00C05D9/00C05F1/002C05F11/00C05F11/08
Inventor 常晓菲常大勇高筱莎
Owner YANTAI GOODLY BIOTECH
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