Method for improving soil with sludge vermicompost

Abstract

The invention provides a method for improving soil by utilizing sludge earthworm casts. The method comprises the following steps: (1) uniformly mixing air-dried and screened dry sludge earthworm casts and farmland cultivated soil according to a certain mass ratio; planting same plants respectively at corresponding ratios; setting three equal rows for each ratio and recording a finally harvested plant biomass; determining an optimal application ratio of the sludge earthworm casts by the biomass; (2) applying the dry sludge earthworm casts to the farmland soil according to the optimal application ratio of the sludge earthworm casts, uniformly and artificially mixing, and collecting blank soil, the earthworm casts and a mixed matrix for physicochemical detection. According to the method, nutrient substances including organic matters, nitrogen, phosphorus and the like in the earthworm casts are utilized so that rapid improvement of the soil is improved; the method is economical and efficient, high in ecological safety and easy to operate.

Description

technical field [0001] The invention belongs to the technical field of plant ecological restoration, and relates to sludge biological treatment technology, in particular to a method for using sludge vermicompost on soil during the agricultural process of sludge vermicompost. Background technique [0002] In 2014, my country's annual output of sludge with a water content of 80% was 25 million tons, and less than a quarter of the established sewage treatment plants had sludge stabilization facilities. It is planned that the total production of sludge in 2015 will exceed 35 million tons It is estimated that by 2020, my country's sludge production will exceed 60 million tons. Therefore, as the sewage treatment process and technology have been perfected day by day, the importance of sludge treatment has become increasingly prominent, and it has become a difficulty and bottleneck in sewage treatment. The ways of sludge treatment mainly include reduction, harmlessness, stabilizatio...

AI Technical Summary

Problems solved by technology

[0003] With the continuous acceleration of my country's economic development, urban domestic and industrial sludge has become an important problem in my country's environment. At present, the research on the effect of heavy metals in sludge vermicompost on plant growth mainly focuses on the mechanism research under laboratory conditions. Under natural conditions, the research on land use of sludge vermicompost in the field is still relatively scarce, so from the perspective of application, we explore the scheme and technology of realizing the field application of sludge vermicompost, and provide a high-efficiency organic fertilizer for sludge vermicompost. Application provides theoretical basis and technical support

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