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Functionalized straw with urease activity inhibition effect, preparation method thereof and determination method of urease inhibition effect

A technology of inhibition and urease activity, applied in the field of functionalized straw and its preparation, can solve the problems of obvious toxic and side effects, high price, short action time, etc., and achieve the effects of low energy consumption, low cost, and easy large-scale application.

Active Publication Date: 2022-04-05
HEBEI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] One of the purposes of the present invention is to provide a functionalized straw with urease activity inhibitory effect to solve the problems of poor stability, high price, short action time and obvious side effects of existing urease inhibitors

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Put 200g of crushed wheat straw powder of 60-180 mesh into a 5L laboratory rotary furnace, feed 200mL / min of oxygen into the rotary furnace, heat the rotary furnace to 240°C, and keep the temperature constant for 2 hours to obtain 90g of the product (product functionalized wheat straw 240 with an acid value of 3.3 mmol / g and a pH of 6.3.

[0037] Weigh 3 g of wheat straw 240 and urea in a weight ratio of 2:1, mix and grind uniformly, add 0.5 g soybean powder in a 150 ml beaker soaked in 20.00 ml distilled water for 15 hours, stir and mix; put 5 grains of diameter A glass bead with a diameter of about 5 mm supports a white rubber stopper with a diameter of 40 mm, and a small 40 mm × 25 mm open beaker with 1.0 ml of hydrochloric acid and 2.0 microliters of bromocresol green-methyl red indicator is placed on the rubber stopper. Then quickly seal the 150ml beaker with a parafilm, put it in a constant temperature water bath at 30±0.5°C; observe and record the time it takes f...

Embodiment 2

[0039] Put 200g of crushed wheat straw powder of 60-180 mesh into a 5L laboratory rotary furnace, feed 100mL / min oxygen into the rotary furnace, heat the rotary furnace to 220°C, and keep the temperature constant for 3 hours to obtain 104g of the product (product functionalized wheat straw 220 with an acid value of 3.3 mmol / g and a pH of 4.8.

[0040] Weigh 3 g of wheat straw 220 and urea in a weight ratio of 2:1, mix and grind uniformly, add 0.5 g soybean powder in a 150 ml beaker soaked in 20.00 ml distilled water for 15 hours, stir and mix; put 5 grains of diameter A glass bead with a diameter of about 5 mm supports a white rubber stopper with a diameter of 40 mm, and a small 40 mm × 25 mm open beaker with 1.0 ml of hydrochloric acid and 2.0 microliters of bromocresol green-methyl red indicator is placed on the rubber stopper. Then quickly seal the 150ml beaker with a parafilm, put it in a constant temperature water bath at 30±0.5°C; observe and record the time it takes for...

Embodiment 3

[0042] Put 200g of pulverized wheat straw powder of 60-180 mesh into a 5L laboratory rotary furnace, feed 600mL / min oxygen into the rotary furnace, heat the rotary furnace to 180°C, and keep the temperature constant for 3 hours to obtain 146g of the product (product functionalized wheat straw 180 with an acid value of 3.0 mmol / g and a pH of 4.50.

[0043] Weigh 3 g of wheat straw 180 and urea in a weight ratio of 2:1, mix and grind uniformly, add 0.5 g soybean powder in 20.00 ml distilled water soaked in 150 ml beaker for 15 hours, stir and mix; put 5 grains of diameter A glass bead with a diameter of about 5 mm supports a white rubber stopper with a diameter of 40 mm, and a small 40 mm × 25 mm open beaker with 1.0 ml of hydrochloric acid and 2.0 microliters of bromocresol green-methyl red indicator is placed on the rubber stopper. Then quickly seal the 150ml beaker with a parafilm, put it in a constant temperature water bath at 30±0.5°C; observe and record the time it takes f...

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Abstract

The invention relates to functionalized straw with a urease activity inhibition effect, a preparation method of the functionalized straw and a determination method of the urease inhibition effect. The preparation method comprises the following steps: putting crushed plant straws into a rotary furnace, raising the furnace temperature to 160-240 DEG C, introducing air or oxygen to carry out oxygen-controlled oxidation for 2-5 hours, and discharging to obtain a substance, namely the functionalized straws with the urease activity inhibiting effect. The functionalized straw can change the ecological environment of soil, reduce the activity of urease in the soil and prolong the retention time of a nitrogen fertilizer in the soil, has no damage to the soil environment, particularly can fertilize and improve the soil, is convenient for large-scale application, and has important practical significance for the sustainable development ecological environment.

Description

technical field [0001] The invention relates to a urease inhibitor, in particular to a functionalized straw with urease activity inhibitory effect, a preparation method thereof and a method for measuring the urease inhibitory effect. Background technique [0002] The theoretical nitrogen content of urea is 46.65%, which is the neutral quick-acting nitrogen fertilizer with the highest nitrogen content and the highest ratio of nitrogen content to price. It is suitable for base fertilizer and top dressing, and sometimes also used as seed fertilizer. Because of its high nitrogen content and large dosage, urea plays an important role in agricultural production. However, urea is molecular and cannot be directly absorbed by plants, nor can it be absorbed by soil. After ordinary urea is applied to the soil, it only takes a few hours to dissolve completely, a small part dissolves in the soil solution in a molecular state, and is absorbed by the soil through hydrogen bonding, and mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/90C05G3/40C05G3/80G01N21/78
Inventor 韩冰王献玲刘微陈国锋马志领焦运红
Owner HEBEI UNIVERSITY
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