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Organic fertilizer for reducing nitrate content of lettuce leaves and preparation method thereof

A technology of nitrate content and organic fertilizer, applied in the preparation of organic fertilizer, organic fertilizer, biological organic part treatment and other directions, to achieve the effects of shortening the growth period, saving labor, and convenient operation

Active Publication Date: 2022-06-03
NANCHANG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved in the present invention is how to reduce the nitrate content of lettuce leaves to a greater extent while promoting the growth of lettuce, thereby providing an organic fertilizer for reducing the nitrate content of lettuce leaves and its preparation method

Method used

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  • Organic fertilizer for reducing nitrate content of lettuce leaves and preparation method thereof
  • Organic fertilizer for reducing nitrate content of lettuce leaves and preparation method thereof
  • Organic fertilizer for reducing nitrate content of lettuce leaves and preparation method thereof

Examples

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Effect test

Embodiment 1

[0032] The present embodiment provides an organic fertilizer for reducing the nitrate content of lettuce leaves, and the preparation method of the organic fertilizer comprises the following steps:

[0033] (1) Take the dried linden branches and leaves and pulverize, add 55% (volume percent) ethanol aqueous solution according to the material-to-liquid ratio of 1g:2ml, extract by ultrasonic for 20min, and filter to obtain the supernatant and the residue. The residue was repeatedly extracted three times, the supernatants were combined, the extract was concentrated at 45° C. by a rotary evaporator, and then freeze-dried to obtain a dry extract powder.

[0034] (2) get 630kg biogas slurry, 30kg peat and 20kg bean cake to mix, add 500ml fermented bacteria solution (fermented bacteria solution adopts the aqueous solution of 5% fermented bacteria in mass percentage, wherein, fermented bacteria is a mass ratio of 1:1:1 The compound fermentation bacteria of yeast, Bacillus subtilis and ...

Embodiment 2

[0038] The present embodiment provides an organic fertilizer for reducing the nitrate content of lettuce leaves, and the preparation method of the organic fertilizer comprises the following steps:

[0039] (1) get the dried linden branches and leaves and pulverize, add the mixed solvent of methanol and dichloromethane with a volume ratio of 1:1 according to the material-to-liquid ratio of 1g:2ml, extract by ultrasonic for 20min, and filter to obtain the supernatant and the residue. The residue was repeatedly extracted three times, the supernatants were combined, the extract was concentrated at 45° C. by a rotary evaporator, and then freeze-dried to obtain a dry extract powder.

[0040] (2) get 630kg biogas slurry, 30kg peat and 20kg bean cake and mix, add 500ml fermented bacteria solution (fermented bacteria solution adopts the aqueous solution of 5% fermented bacteria in mass percentage, wherein, fermented bacteria is a mass ratio of 1:1:1 The compound fermentation bacteria o...

Embodiment 3

[0044] The present embodiment provides an organic fertilizer for reducing the nitrate content of lettuce leaves, and the preparation method of the organic fertilizer comprises the following steps:

[0045] (1) get the dried Cinnamomum camphora branches and leaves and pulverize, be 1g: 2ml according to the material-to-liquid ratio, add the mixed solution (the mixed solution includes dichloromethane, water and methanol whose volume ratio is 1:1:1), ultrasonically extract 20min, filter Obtain supernatant and residue. The residue was repeatedly extracted three times, the supernatants were combined, the extract was concentrated at 45° C. by a rotary evaporator, and then freeze-dried to obtain a dry extract powder.

[0046] (2) get 630kg biogas slurry, 30kg peat and 20kg bean cake and mix, add 500ml fermented bacteria solution (fermented bacteria solution adopts the aqueous solution of 5% fermented bacteria in mass percentage, wherein, fermented bacteria is a mass ratio of 1:1:1 Th...

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Abstract

The invention provides an organic fertilizer capable of reducing nitrate content of lettuce leaves. The organic fertilizer comprises the following raw materials in parts by weight: 100 parts of biogas slurry leavening; 1-5 parts of a Lauraceae plant branch and leaf extract; the lauraceae plant extract and the biogas slurry leavening are used in a combined manner to achieve a synergistic effect, and growth of chemoautotrophic bacteria (including nitrite bacteria) can be inhibited to a great extent, so that ammonium salt or ammonia in soil is inhibited from being converted into nitrous acid and nitric acid under the action of the nitrite bacteria, and a better nitrification inhibition effect is further achieved; the quality of the lettuce leaves is improved; one-time fertilization can be achieved, topdressing is not needed later, labor is greatly saved, and the nitrate content of the lettuce leaves is remarkably reduced.

Description

technical field [0001] The invention relates to the field of fertilizers, in particular to an organic fertilizer for reducing the nitrate content of lettuce leaves and a preparation method thereof. Background technique [0002] Vegetables are essential plant foods for human survival, and the nitrate content in vegetables is higher than that of other plants. Nitrate itself is not harmful to the human body, but it can be reduced to nitrite under the action of bacteria, and nitrite can not only cause methemoglobinemia, but also combine with ammonia in the human body to form ammonium nitrite, which induces Digestive system cancer, thus seriously endangering human health. Fertilization, especially chemical nitrogen fertilizer, is an important cause of nitrate accumulation in vegetables. [0003] Biogas slurry has attracted more and more attention due to its rich organic carbon, nitrogen, phosphorus, potassium and other nutrients. Therefore, the organic fertilizer made from biog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/90C05G5/20C05F17/20C05F17/40C05F17/80
CPCC05G3/00C05G3/90C05G5/20C05F17/20C05F17/40C05F17/80C05B1/02C05C3/00C05C9/00C05D1/02C05D5/00C05D9/02C05F5/002C05F9/04C05F11/02Y02W30/40
Inventor 张杰侯杰希赵姣刘佳刘明张北红肖昌龙金志农
Owner NANCHANG INST OF TECH
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