Special water and fertilizer retention fertilizer for tomatoes and preparation method of special water and fertilizer retention fertilizer

A technology for water and fertilizer retention and special fertilizer, applied in application, fertilization device, fertilizer mixture, etc., can solve the problems of poor quality, small tomato fruit, poor soil water absorption, etc.

Pending Publication Date: 2022-07-22
QINGDAO HEZIFEI BIOTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the slow-release fertilizer has poor water absorption to the soil in the dry season, and cannot meet

Method used

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  • Special water and fertilizer retention fertilizer for tomatoes and preparation method of special water and fertilizer retention fertilizer
  • Special water and fertilizer retention fertilizer for tomatoes and preparation method of special water and fertilizer retention fertilizer
  • Special water and fertilizer retention fertilizer for tomatoes and preparation method of special water and fertilizer retention fertilizer

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preparation example Construction

[0045] The invention provides a method for preparing a special fertilizer for tomato that retains water and fertilizer, comprising the following steps:

[0046] 1) mixing the modified bentonite and the water-absorbing polymerized monomer in an ice-water bath, and adjusting the reaction system to neutrality with a pH regulator to obtain a prepolymer;

[0047] 2) adding the inorganic fertilizer to the prepolymer for reaction, when the temperature of the reaction system drops to 30-45°C, adding a crosslinking agent and an initiator in sequence to continue the reaction to obtain a gel-like polymer;

[0048] 3) The gel polymer is dried and then crushed to obtain a special fertilizer for tomato that retains water and fertilizer.

[0049] In the present invention, the mixing temperature in the step 1) is 5-20°C, and the mixing time is 10-15min; preferably, the mixing temperature is 10-15°C, and the mixing time is 12-14min; more preferably , the mixing temperature is 12°C, and the mi...

Embodiment 1

[0056] Preparation of special fertilizer for tomato to retain water and fertilizer:

[0057] Soak 30 g of sodium bentonite powder with a particle size of 10 μm in 20 mL of 5 mol / L sulfuric acid solution, and obtain modified bentonite after the bentonite is swollen;

[0058] Mix 10 parts of modified bentonite and 15 parts of acrylamide in an ice-water bath at 5°C with a rotating speed of 80 rpm, and adjust the pH of the system to neutrality with 5 mol / L NaOH solution to obtain a prepolymer;

[0059] 50 parts of inorganic fertilizer and the above-mentioned prepolymer were reacted at 80°C for 10min, and when the reaction system was lowered to 40°C, 0.005 part of crown ether and 0.01 part of ammonium persulfate were added to continue the reaction for 10min, and the reaction was required to be stirred at 110rpm. A gelatinous polymer is obtained; wherein the mass ratio of potassium nitrate, magnesium sulfate, sodium hydrogen phosphate and ammonium molybdate in the inorganic fertiliz...

Embodiment 2

[0062] Preparation of special fertilizer for tomato to retain water and fertilizer:

[0063] 50g of sodium-based bentonite powder and calcium-based bentonite powder (the mass ratio of sodium-based bentonite powder and calcium-based bentonite powder is 1:1) with a particle size of 8 μm are soaked in the sulfuric acid solution of 20 mL of 10 mol / L, and obtained after the bentonite is swollen. Modified bentonite;

[0064] Mix 15 parts of modified bentonite with 10 parts of 2-acrylamido-2-methylpropanesulfonic acid and 10 parts of maleic acid in an ice-water bath at 10°C at a speed of 80 rpm, and adjust the pH of the system to 3 mol / L KOH solution. Neutral, get prepolymer;

[0065] 35 parts of inorganic fertilizer and the above prepolymer were reacted at 78°C for 10min, and when the reaction system dropped to 45°C, 0.010 parts of β-cyclodextrin and 0.15 parts of ammonium persulfate were added to continue the reaction for 10min, and the speed of rotation at 100rpm was required dur...

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Abstract

The invention provides a special water and fertilizer retention fertilizer for tomatoes and a preparation method of the special water and fertilizer retention fertilizer, and belongs to the technical field of fertilizers. Modified bentonite and a water-absorbing polymeric monomer are subjected to prepolymerization to obtain a prepolymer, then under the action of a cross-linking agent and an initiator, the prepolymer and an inorganic fertilizer are subjected to a copolymerization reaction to obtain a gelatinous material, and the gelatinous material is dried and then crushed into particles to obtain the special water and fertilizer retention fertilizer for tomatoes. Bentonite is modified, metal ions such as Al < 3 + >, Mg < 2 + > and Ca < 2 + > in a bentonite solid layer are dissolved out in a soluble salt mode, pore channels of the bentonite are promoted to be dredged, circulation of an adsorbate molecular structure is facilitated, after the modified bentonite and a water-absorbing polymeric monomer are subjected to a polymerization reaction, a polymer contains a porous structure, and the adsorption capacity of the adsorbent is improved. The water absorptivity of the fertilizer and the adsorption performance on inorganic nutrients are greatly improved, and the water and fertilizer retention performance on tomato plants is effectively improved.

Description

technical field [0001] The invention relates to the technical field of fertilizers, in particular to a special fertilizer for tomato that retains water and fertilizer and a preparation method thereof. Background technique [0002] Tomato is one of the crops with the most consumption at present. Tomato has a large growth volume, but its harvest period is long and requires a large amount of fertilizer. It must have sufficient water and nutrient supply to meet its growth needs. The vegetative growth and reproductive growth of tomato must be coordinated to achieve high yield and high quality. Otherwise, excessive nutrients, especially nitrogen, will lead to excessive plant growth, which will easily cause fruit drop and reduce yield; if nutrients are insufficient, stem and leaf growth and reproductive growth will occur. Competing for nutrients, the fruit is small and the quality is reduced. Tomato needs a balanced and sufficient supply of nutrients and water during the growth pr...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G3/80
CPCC05G3/00C05G3/80C05B7/00C05C3/00C05C5/02C05D5/00C05D9/00
Inventor 郭音孜朱贺源朱淞琳
Owner QINGDAO HEZIFEI BIOTECH CO LTD
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