Liquid organic fertilizer for reducing heavy metal pollution of soil and production method of liquid organic fertilizer

Abstract

The invention discloses a liquid organic fertilizer for reducing heavy metal pollution of soil and a production method of the liquid organic fertilizer. The liquid organic fertilizer is prepared fromthe following components in parts by weight: 40-50 parts of animal viscera, 20-30 parts of chicken manure, 30-40 parts of pig manure, 20-30 parts of grape skins, 20-30 parts of coconut shell powder, 20-30 parts of shrimp and crab shell powder, 5-10 parts of a microbial agent, 5-10 parts of amino acid, 25-35 parts of charcoal, 4-8 parts of soybean lecithin, 5-10 parts of succinyl trehalose lipid, 5-10 parts of disaccharide single-lipid rhamnolipid and 2000-3500 parts of water. The liquid organic fertilizer disclosed by the invention has high affinity for various heavy metal ions, so that the content of heavy metals in the soil can be reduced, and thus accumulation of the heavy metals in the plants can be reduced. Meanwhile deficiency of beneficial trace elements cannot be caused, adsorptionforce is strong and durable, activation or desorption is not easy, and in-situ remediation on soil heavy metals is realized while nutrients are provided for crops.

Description

technical field [0001] The invention belongs to the technical field of fertilizer manufacture, and in particular relates to a liquid organic fertilizer for reducing soil heavy metal pollution and a production method thereof. Background technique [0002] Soil is an important part of the environment on which human beings live. Various pollutants that enter the soil will interact with soil particles, be absorbed and enter the soil, especially heavy metal pollutants that cannot be degraded and will accumulate in the soil. When the bearing capacity of the soil itself is exceeded, it will cause pollution. Among these heavy metals, elements with strong biological toxicity include Hg, Cd, Pb, Cr and As, collectively known as the "five poisons". Existing studies have confirmed that heavy metal pollution caused by fertilizer application and sewage irrigation, especially the application of chemical fertilizers, can no longer be ignored, and the accumulation of heavy metals in crops wi...

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Problems solved by technology

[0005] Since there are usually several heavy metals in polluted soil, it is difficult to find a suitable method to reduce the biological activity of most heavy metal ions for complex polluted soil where multiple heavy metals coexist. At the same time, existing methods can absorb heavy metal ions. It also has adsorption effect on trace elements required by crops such as Cu and Zn, which can easily lead to a shortage of nutrient elements. In addition, there are problems such as unstable adsorption of heavy metals, and heavy metals are reactivated or desorbed due to competition.

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