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Chitosan coated sustained release fertilizer special for corns, and preparation method thereof

A chitosan-coated, corn-specific technology, applied in the direction of layered/coated fertilizers, application, nitrogen fertilizers, etc., can solve problems such as difficult to handle, large quantities, and secondary pollution, reduce toxicity and solubility, and improve planting Environment, the effect of increasing the content of heavy metals

Inactive Publication Date: 2017-05-10
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of chemical method, biological method, phytoremediation method and incineration method are: removing heavy metals from soil not only requires a lot of financial and material resources, but also it is obviously unrealistic to adopt this method in the face of soil, and those who absorb and enrich heavy metals Plants are also difficult to further process, and may cause secondary pollution problems

Method used

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  • Chitosan coated sustained release fertilizer special for corns, and preparation method thereof
  • Chitosan coated sustained release fertilizer special for corns, and preparation method thereof
  • Chitosan coated sustained release fertilizer special for corns, and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Formula: 12 parts of potassium nitrate, 13 parts of ammonium sulfate, 40 parts of urea, 7 parts of superphosphate, 16 parts of potassium dihydrogen phosphate, 9 parts of admixture, 8 parts of reaction aid, 23 parts of modified montmorillonite, chitosan 53 parts of sugar.

[0023] The preparation method of modified montmorillonite:

[0024] (1) Pulverization: the montmorillonite is ball-milled into a fine powder with a fineness≤0.04mm with a ball mill to obtain montmorillonite powder;

[0025] (2) Activation: Put the montmorillonite powder into the ultrasonic equipment, process it at an ultrasonic power of 600w for 20min, then send it into the calcination tower for 90min at a high temperature of 300°C, add the montmorillonite powder into absolute ethanol after cooling, and ultrasonically Centrifuge after dispersing for 10 minutes, repeat ultrasonic dispersion and centrifugation twice, then add distilled water, ultrasonically disperse for 10 minutes, then centrifuge, rep...

Embodiment 2

[0029] Formula: 18 parts of potassium nitrate, 19 parts of ammonium sulfate, 60 parts of urea, 13 parts of superphosphate, 22 parts of potassium dihydrogen phosphate, 15 parts of admixture, 14 parts of reaction aid, 29 parts of modified montmorillonite, chitosan 59 parts of sugar.

[0030] The preparation method of modified montmorillonite:

[0031] (1) Pulverization: the montmorillonite is ball-milled into a fine powder with a fineness≤0.04mm with a ball mill to obtain montmorillonite powder;

[0032] (2) Activation: Put the montmorillonite powder into the ultrasonic equipment, process it for 40min under the ultrasonic power of 1000w, then send it into the calcination tower and calcine it at a high temperature of 600°C for 120min, after cooling, add the montmorillonite powder into absolute ethanol, and ultrasonically Centrifuge after dispersing for 18 minutes, repeat ultrasonic dispersion and centrifugation for 3 times, then add distilled water, ultrasonically disperse for 1...

Embodiment 3

[0036] Formula: 14 parts of potassium nitrate, 15 parts of ammonium sulfate, 45 parts of urea, 9 parts of superphosphate, 18 parts of potassium dihydrogen phosphate, 11 parts of admixture, 10 parts of reaction aid, 25 parts of modified montmorillonite, chitosan 55 parts of sugar.

[0037] The preparation method of modified montmorillonite:

[0038] (1) Pulverization: the montmorillonite is ball-milled into a fine powder with a fineness≤0.04mm with a ball mill to obtain montmorillonite powder;

[0039] (2) Activation: Put the montmorillonite powder into the ultrasonic equipment, process it for 20min at an ultrasonic power of 600w, then send it into the calciner tower and calcinate it at a high temperature of 300-℃ for 90min, add the montmorillonite powder into absolute ethanol after cooling, After ultrasonic dispersion for 10 minutes, centrifuge, repeat ultrasonic dispersion and centrifugation twice, then add distilled water, ultrasonic dispersion for 10 minutes, centrifugal s...

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Abstract

The invention discloses a chitosan coated sustained release fertilizer special for corns, and a preparation method thereof. The chitosan coated sustained release fertilizer special for corns is prepared from the following raw materials in parts by weight: 12 to 18 parts of potassium nitrate, 13 to 19 parts of ammonium sulfate, 40 to 60 parts of urea, 7 to 13 parts of calcium superphosphate, 16 to 22 parts of monopotassium phosphate, 9 to 15 parts of additives, 8 to 14 parts of a reaction promoter, 23 to 29 parts of modified montmorillonite and 53 to 59 parts of chitosan. The chitosan coated sustained release fertilizer special for the corns contains various nutritional ingredients and can meet the requirements of the corns on various nutrients; the raw materials such as the thio-sulfide, a plant growth regulator and herbicide are added into the raw materials of the sustained release fertilizer, so when being used in the cultivation process of the corns, the sustained release fertilizer can not only effectively solve the problems of soil heavy metal pollution and toxic and harmful substance residues, but also improve the planting environment, inhibit growth of weed and improve the growth situation of the corns.

Description

technical field [0001] The invention relates to the technical field of fertilizer preparation, in particular to a special slow-release fertilizer for chitosan-coated corn and a preparation method thereof. Background technique [0002] Corn is an annual herbaceous plant of the grass family Zea genus. Alias: corn, cob, corn, corn, millet, corn, corn, pearl rice, bract reed, big milo. The proportion of total corn consumption in rations is about 5%, but with the development of the times, this proportion has increased. gradually decreasing trend. In Mexico, the "hometown of corn", the annual consumption of "national dish" tortillas reaches as much as 12 million tons; in developed countries and regions, corn is also used as a source of iron, magnesium and other minerals necessary for the human body. It is widely eaten; in some poor countries and regions, corn is still a cheap food for people to eat. Although the nutritional value of corn is lower than that of other grains, isoma...

Claims

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Application Information

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IPC IPC(8): C05G3/00
CPCC05B1/02C05G3/00C05G5/30C05B7/00C05C3/00C05C5/02C05C9/00C05D9/00C05F11/00
Inventor 陈肖虎鲁圣军刘利金会心唐道文赵平原王丽远
Owner GUIZHOU UNIV