Composite biological carbon-based carrier with pesticide slow release performance and preparation method and application

A slow-release performance, biochar technology, applied in the direction of botanical equipment and methods, applications, alkali metal compounds, etc., can solve the problems of poor adsorption capacity and selectivity, achieve large drug loading, save labor costs, and environmental compatibility Good results

Inactive Publication Date: 2017-09-22
HUAZHONG AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These types of carriers all have certain adsorption functions, but their adsorption capacity and selectivity are slightly poor.

Method used

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  • Composite biological carbon-based carrier with pesticide slow release performance and preparation method and application
  • Composite biological carbon-based carrier with pesticide slow release performance and preparation method and application
  • Composite biological carbon-based carrier with pesticide slow release performance and preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A composite biochar-based carrier with pesticide slow-release performance, which is made of the following raw materials in parts by weight:

[0044]

[0045]

[0046] A preparation method of a composite biochar-based carrier with pesticide slow-release performance, the steps are:

[0047] 1. Rapeseed stalks are washed and dried with water and processed into 3 or 4 cm pieces, ground in a grinder, passed through a 40-mesh sieve, and dried for later use.

[0048] 2. Take rape straw powder of a certain quality through a 40 or 50 or 60 or 70 or 80 mesh sieve in a 2000mL beaker, add a certain volume of phosphoric acid solution (concentration is 5-80%), fully stir to obtain a suspension, in a certain Under the conditions of temperature (25 or 27 or 29 or 30°C) and ultrasonic (power 100W-500W, 30 or 40 or 50 or 60min), continuous soaking treatment for 12h or 16 or 20 or 24 or 28 or 32 or 36h, constant temperature drying oven Dry at 60°C or 70°C or 80°C or 90°C or 100°C f...

Embodiment 2-6

[0057] A composite biochar-based carrier with pesticide slow-release performance, which is made of the following raw materials in parts by weight

[0058]

[0059] Its preparation steps are identical with embodiment 1.

[0060] The sodium carboxymethylcellulose is replaced with any one of sodium alginate, sodium alginate+sodium carboxymethylcellulose, etc.; the bentonite is replaced with montmorillonite, attapulgite, diatomaceous earth, etc. of any kind.

Embodiment 7

[0062] The application of a composite biochar-based carrier with pesticide slow-release performance in the cultivation of rapeseed comprises the following steps:

[0063] A. Take about 30 g of phosphoric acid-activated and modified biochar (PRS-BC) in a beaker, add 200 mL of deionized water, stir for 2 hours in a water bath at 80°C, and cool to room temperature.

[0064] B. Add 2 g of carbendazim at room temperature (25° C.) and continue stirring for 2 hours, then let stand for 1 hour, repeat the above operation three times, and let stand overnight.

[0065] C. Add 200g of bentonite and 10g of sodium carboxymethylcellulose, mix and age for 2 hours. Another 200g of bentonite was added for granulation, air-dried under natural conditions or dried at low temperature (30 or 35 or 41 or 46 or 50°C), and passed through a 40-mesh sieve. That is, the composite biochar-based carrier (biochar-based carbendazim slow-release agent) is obtained.

[0066] D. Rapeseed seeds and biochar-base...

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Abstract

The invention discloses a composite biological carbon-based carrier with pesticide slow release performance and preparation method and application. The composite biological carbon-based carrier is prepared from modified biological carbon, a pesticide solution, sodium carboxymethylcellulose and bentonite. The preparation method comprises the following steps: A, washing rape stalks with water, drying, treating, smashing, and screening for later use; C, performing pyrolysis on the rape stalks at a certain temperature under the condition of limited oxygen to obtain biological carbon, treating the biological carbon with sodium hydroxide, washing with treated biological carbon with deionized water till the pH is constant, drying in a drying oven, and smashing to obtain the modified biological carbon; D, mixing the modified biological carbon with the pesticide solution to obtain a suspension-loaded pesticide, stirring at room temperature, uniformly mixing the sodium carboxymethylcellulose with the bentonite according to weight parts, aging for a certain time, and drying a solid substance in an air blast drying oven at a low temperature to obtain the composite carrier. The invention further relates to application of the composite carrier to rape cultivation. A composite controlled-release substrate does not generate any side effect on soil, has high environment compatibility, and can prolong the release time of the pesticide in soil.

Description

technical field [0001] The present invention relates to the technical field of environmentally friendly pesticide slow-release carriers, more specifically to a composite biochar-based carrier with pesticide slow-release performance, and to a preparation method for a composite biochar-based carrier with pesticide slow-release performance. At the same time, it also relates to the use of a composite biochar-based carrier with pesticide slow-release performance. Background technique [0002] my country is a large agricultural country, and sufficient food supply is of great importance. Due to diseases, insect pests and weeds, crop production has been reduced or even failed, and agricultural losses have been huge. In order to reduce crop weed damage, disease and insect damage, a large number of pesticides are applied to farmland every year. While reducing crop diseases, insect pests and weed damage, these pesticides also have a huge negative impact on the environment and ecology. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/08A01N47/18B01J20/22B01J20/28B01J20/30
CPCA01N25/08A01N47/18B01J20/12B01J20/20B01J20/22B01J20/28064B01J20/28066B01J20/28083Y02A40/22Y02P60/21
Inventor 刘永红钟晓晓任奕林蒯婕周广生
Owner HUAZHONG AGRI UNIV
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