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Flue-cured tobacco cadmium-reducing organic fertilizer based on cow dung and preparation method and application thereof

A technology of organic fertilizer and cow dung, applied in the direction of organic fertilizer, application, inorganic fertilizer, etc., can solve the problems of uneven and uncommon effects, and achieve the effect of reducing heavy metal content, expanding functions and performance

Inactive Publication Date: 2018-08-07
GUIZHOU TOBACCO SCI RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Cow dung is the most common organic fertilizer. It should be an economical and practical organic material soil heavy metal passivator, but it is not common in practical application. Even if it is applied, its effect is uneven.

Method used

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  • Flue-cured tobacco cadmium-reducing organic fertilizer based on cow dung and preparation method and application thereof
  • Flue-cured tobacco cadmium-reducing organic fertilizer based on cow dung and preparation method and application thereof
  • Flue-cured tobacco cadmium-reducing organic fertilizer based on cow dung and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A cadmium-reducing organic fertilizer for flue-cured tobacco with cow dung as the substrate, which is formulated by weight from the following raw materials:

[0054]

[0055] Described cow dung: on an air-dried basis, organic carbon (C) 33.5%, total nitrogen (N) 1.5%, total phosphorus (P) 0.3%, total potassium (K) 1.0%, total cadmium (Cd) 2.4mg / kg, total arsenic (As) 10.5mg / kg, total mercury (Hg) 0.6mg / kg, total lead (Pb) 22.6mg / kg, total chromium (Cr) ≤ 53.8mg / kg, moisture (H 2 O) 10.6%;

[0056] The slag: its silicon dioxide (SiO 2 ) content of 58.3%, and trace metal nutrient oxides (Fe 2 o 3 +MnO 2 +CaO+MgO+ZnO+CuO, etc.) the total amount is 26.5%, the total cadmium (Cd) content is 2.7mg / kg, the total arsenic (As) content is 3.9mg / kg, the total mercury (Hg) content is 0.6mg / kg kg, the total lead (Pb) content is 32.5mg / kg, the total chromium (Cr) content is 68.8mg / kg, the moisture (H 2 O) content was 2.4%.

[0057] A method for preparing a flue-cured tobacco ...

Embodiment 2～ Embodiment 13

[0063] A cadmium-reducing organic fertilizer for flue-cured tobacco with cow dung as the substrate, which is formulated by weight from the following raw materials:

[0064] raw material

[0065] The parameters of the cow dung and slag are the same as in Example 1, and the preparation steps are the same as in Example 1.

Embodiment 14

[0067] In this example, the organic fertilizer prepared from the formula described in Example 8 is taken as an example to illustrate the application steps of the product.

[0068] A kind of flue-cured tobacco cadmium-reducing organic fertilizer with cow dung as the substrate is used in the production (planting) of 1.52mg / kg (severely polluted) tobacco area in which the total cadmium content of soil is 1.52mg / kg. The steps are:

[0069] A. According to the flue-cured tobacco production (planting) habits in this area, carry out normal field operations such as soil preparation, ditching, and ridging according to its conventional cultivation mode and production mode.

[0070] B. According to the application level of 150kg / mu, use this organic fertilizer product to replace the original base fertilizer for planting flue-cured tobacco, and open a small row ditch 2.5cm wide and 3.5cm deep on the tobacco planting row, and spread the fertilizer evenly in the small row ditch Then carry o...

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Abstract

The invention discloses flue-cured tobacco cadmium-reducing organic fertilizer based on cow dung and a preparation method and application thereof. The flue-cured tobacco cadmium-reducing organic fertilizer comprises cow dung, potassium dihydrogen phosphate, sodium selenite, furnace slag, calcium carbonate, magnesium sulfate and sulfuric acid according to a certain ratio. The preparation method comprises A, stack retting decomposition of cow dung, potassium dihydrogen phosphate and sodium selenite, B, furnace slag preparation, and C, preparation of enough amounts of other three commodity raw materials and furnace slag raw materials prepared through the step B based on the mass of the cow dung matrix in step A, and uniform stirring of the raw materials and a stack retting decomposition raw material prepared through the step A so that the flue-cured tobacco cadmium-reducing organic fertilizer is obtained. The flue-cured tobacco cadmium-reducing organic fertilizer has a simple formula. Thepreparation method is easy and is easy to operate. The product satisfies the national organic fertilizer standards, significantly passivates the soil cadmium activity, reduces flue-cured tobacco cadmium accumulation, reduces the soil active cadmium by 28.8-44.9% and flue-cured tobacco cadmium content by 18.8-50.3%, especially reduces the cadmium in the upper leaves by 42.9-50.3% and has a large promotion and application value in the heavy metal-polluted tobacco areas such as cadmium-polluted tobacco areas.

Description

technical field [0001] The invention belongs to the technical field of agricultural environment conservation and restoration, and more specifically relates to a cadmium-reducing organic fertilizer for flue-cured tobacco with cow dung as a substrate. The invention discloses a method for preparing flue-cured tobacco cadmium-reducing organic fertilizer with cow dung as a substrate, and the application of the organic fertilizer, which is suitable for the production of flue-cured tobacco in areas polluted by heavy metals, especially in areas polluted by cadmium. Background technique [0002] According to the results of the "National Soil Pollution Survey Bulletin" published in early 2014, about 300 million mu of cultivated land in my country has been polluted by heavy metals, of which about 50 million mu of cultivated land has reached moderate and severe levels of pollution. Agricultural environmental pollution, especially soil heavy metal pollution has become an important factor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/02C05G3/04A01G22/45A01B79/02C05G3/60C05G3/80
CPCA01B79/02C05B7/00C05G3/60C05G3/80C05D3/02C05D5/00C05D9/00C05D9/02C05F3/00
Inventor 商胜华朱奇宏黄道友夏海乾朱捍华许超饶中秀
Owner GUIZHOU TOBACCO SCI RES INST
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