Tobacco stalk biochar soil conditioner and improvement method for tobacco field soil

Abstract

The invention discloses a tobacco stalk biochar soil conditioner capable of reducing the content of heavy metals in tobacco, improving the tobacco quality and improving the soil environment, as well as an improvement method for tobacco field soil. The tobacco stalk biochar soil conditioner is prepared by mixing the following raw materials in parts by weight: 40-60 parts of tobacco stalk biochar and 40-60 g of a passivant. The tobacco stalk biochar soil conditioner is easy to obtain raw materials, simple in preparation method and low in cost, can effectively reduce the content of heavy metals in tobacco, and can improve the quality of tobacco field soil; a large number of waste tobacco stalks generated in tobacco growing areas are adopted as the raw material, the resource recycling of waste materials is realized, the sustainable development of the tobacco industry is facilitated, and the tobacco stalk biochar soil conditioner is suitable for large-scale popularization and application in the field of tobacco growing.

Description

technical field [0001] The invention relates to the technical field of agricultural soil treatment, in particular to a tobacco stalk biochar-based soil conditioner and a tobacco field soil improvement method. Background technique [0002] Heavy metals are a class of pollutants that are relatively common on the earth and potentially harmful to ecology. Its main source is that with the mining, smelting, processing and commercial manufacturing of heavy metals by humans, many heavy metals such as lead, cadmium, mercury, etc. enter the atmosphere, water or soil, causing serious heavy metal pollution. Compared with other pollution, heavy metal pollution can be enriched in organisms and transform heavy metals into more toxic metal organic compounds. Tobacco is a plant that is easy to accumulate heavy metals, especially cadmium in the soil, which is enriched in the leaves, and the enrichment factor can reach 5-10 times. As a special demand product, various heavy metal elements con...

AI Technical Summary

Problems solved by technology

At present, the method to solve heavy metal pollution in tobacco is mainly to implement agricultural ecological engineering measures for the soil, and to apply various amendments on the soil polluted by heavy metals, such as the application of inorganic amendments such as attapulgite or organic fertilizers such as cow dung, but these methods It is only suitable for seriously polluted soil, and the operation is cumbersome, and it is easy to affect the soil quality. It has little effect on improving the tobacco planting soil in a large area.

There are also some phytoremediation methods, that is, planting some heavy metal hyper-accumulated plants on the polluted soil, such as ryegrass, etc., to purify the soil, but this method takes a long time to process and is slow to take effect, and it will also affect the planting cycle of tobacco , so that the productive value of the soil is affected

For some physical methods such as heat treatment and electrochemical method, the one-time investment is high, and it is difficult to popularize and apply them in daily operations

Images