Method of preparing regenerated humic acid (HA) pollution modifier

A humic acid and improver technology, applied in botany equipment and methods, chemical instruments and methods, organic fertilizers, etc., can solve the problems of pathogenic bacteria invasion, high cost investment, long research cycle, etc., to alleviate the carrying capacity and low cost , the effect of a wide range of sources

Inactive Publication Date: 2011-06-08
HEILONGJIANG ACAD OF SCI INST OF NATURAL RESOURCES
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Problems solved by technology

This method is often realized by transgenic technology, which has the disadvantages of long research period and high input cost; (2) reapplying organic fertilizer
Although the use of organic fertilizer can reduce the content of nitrate in vegetables, the incomplete decomposition of organic fertilizer will lead to the invasion of pathogenic bacteria. At the same time, excessive organic fertilizer will bring secondary pollution; (3) balanced fertilization
A reasonable combination of nitrogen, phosphorus, and potassium can prevent and control the accumulation of nitrate in vegetables, but there are also problems of high cost input and difficulty in controlling the amount of application; other methods such as foliar spraying of trace elements or application of nitrogen fertilizer inhibitors are easy to cause environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] 1. Raw materials: regenerated humic acid (HA50%, pH6.1, ash (dry basis) 15%), urea (N≥46.6%), dipotassium hydrogen phosphate (industrial grade), dicyandiamide (industrial grade).

[0014] 2. Preparation:

[0015] (1) Take 40 ml of regenerated humic acid raw material with 50% humic acid and dissolve in 300 ml of water; (2) Reconstitute: heat to 50℃, first add 78.7 g of urea, then add 117.7 g of dipotassium hydrogen phosphate, stir to dissolve 5 Add 58.4 grams of dicyandiamide and stir quickly for 5 minutes. (3) Constant volume: After dissolving completely, cool and dilute to 500ml. In this embodiment, in the compounding process, urea and dipotassium hydrogen phosphate are first dissolved at low heat; then dicyandiamide is added to dissolve. This is because dicyandiamide is easily soluble in water, so first heat urea and potassium dihydrogen phosphate to dissolve it. If the order of addition is not correct, it will cause precipitation in the product and affect the applicatio...

Embodiment 2

[0017] Comprehensive control technology of regenerated humic acid. The product of step (2) and step (3) of applying regenerated humic acid modifier without changing the amount of base fertilizer can replace chemical fertilizer. The specific technical measures are as follows:

[0018] (1) Applicable varieties: roots and stems of greenhouse vegetables that are easy to accumulate nitrates. (2) Application period: irrigate the modifier twice during the slow seedling stage of stem vegetables and the strong seedling stage of root vegetables. (3) How to use: 2500 ml / mu·time of improver is applied in irrigation, and the irrigation concentration is 1:700-1:800. (4) Agronomic measures: increase the amount of irrigation during the irrigation period or increase the irrigation twice a month, and increase the light time by one hour a day. (5) Application effect: This control technology can effectively reduce the nitrate content of greenhouse vegetables by 32.75-57.94%; meanwhile, the increas...

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Abstract

The invention relates to a method of preparing regenerated humic acid (HA) pollution modifier. The gegenerated HA which is prepared from the raw material of the rice straw which contains 30-38 percent of cellulose and has the concentration of 50-85 percent, the dry ash of 10-18 percent the pH value of 4.5-6.5. The invention discloses a comprehensive and applicable technology aiming at preveting the gegenerated HA pollution to the greenhouse vegetable by combing various measures of preventing the gegenerated HA pollution, in particular the nitrate pollution to the greenhouse vegetable according to the accumulation mechanism and the accumulation reason of the nitrate. The invention has the advantage that the regenerated HA pollution modifier has reasonable formula, can effectively prevent the nitrate pollution to the greenhouse vegetable so as to improve the quality of the greenhouse vegetable, can reduce the nitrate pollution to the greenhouse vegetable by 32.75-57.94 percent and ensure that the greenhouse vegetable is up to the pollution-free standard (GB19338-2003) and can increase the yield of the greenhouse vegetable by 9.45-21.6 percent.

Description

Technical field [0001] The invention relates to a preparation method of a regenerated humic acid pollution improver. technical background [0002] The prevention and control measures of nitrate pollution in greenhouse vegetables at home and abroad are mainly through the following methods: (1) Cultivating low-nitrate accumulation vegetable varieties. This method is often realized by genetically modified technology, which has the disadvantages of long research period and high input cost; (2) Reapplying organic fertilizer. Although the use of organic fertilizer can reduce the content of nitrate in vegetables, the incomplete decomposition of organic fertilizer will lead to the invasion of pathogens. At the same time, excessive organic fertilizer will cause secondary pollution; (3) Balanced fertilization. A reasonable combination of nitrogen, phosphorus, and potassium can prevent the accumulation of nitrate in vegetables, but there are also problems with high cost input and difficult...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01G1/00C09K17/40
Inventor 吕品于志民沈光周琳马献发王立民张继舟曹宏杰张洪运王宏韬袁磊
Owner HEILONGJIANG ACAD OF SCI INST OF NATURAL RESOURCES
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