A method for remediating barren compacted soil with slow release of air

Abstract

The invention discloses a method for remediating barren compacted soil with air overflow and slow release, which belongs to the field of soil restoration. It is a method for remediating impoverished compacted soil with air overflow and slow release. Through the combination of longitudinal slow release rods and biological mud, on the one hand, it can Effectively increase the content of organic matter in barren soil, increase the content and activity of microorganisms in it, and significantly remediate the efficiency. On the other hand, injecting water first during the remediation can not only form stomata channels in the surrounding soil, but also facilitate the subsequent water-soluble fertilizer to the soil. The uniform diffusion can also soak the surrounding soil in advance, improve the soil adhesion, and facilitate the improvement of the soil's adsorption capacity for water-soluble fertilizers when water-soluble fertilizers are introduced. The speed of overflow in the soil can effectively avoid the situation that the water-soluble fertilizer is too late to be absorbed and lost. Compared with the existing technology, the absorption of water and water-soluble fertilizer by the soil is significantly improved, thereby improving the repair efficiency and reducing the repair cost.

Description

technical field [0001] The invention relates to the field of soil remediation, and more specifically, relates to a method for remediating poor compacted soil with slow-release air. Background technique [0002] Soil compaction refers to the phenomenon that the surface layer of the soil is poor in structure due to the lack of organic matter, and the structure is destroyed and the soil material is dispersed under the action of external factors such as irrigation or rainfall, and the soil surface is hardened by the cohesive force after drying. There are about 7 main factors for soil compaction: 1. The soil texture of the farmland is heavy and the clay content in the shallow clay in the cultivated layer is relatively large. In addition, the average cultivated layer is less than 20cm, and the capillary pores in the soil are less, which is good for ventilation, water permeability, The warming performance is poor, resulting in crusting on the soil surface; 2. The input of organic m...

AI Technical Summary

Problems solved by technology

There are about 7 main factors for soil compaction: 1. The soil texture of the farmland is heavy and the clay content in the shallow clay in the cultivated layer is relatively large. In addition, the average cultivated layer is less than 20cm, and the capillary pores in the soil are less, which is good for ventilation, water permeability, The warming performance is poor, resulting in crusting on the soil surface; 2. The input of organic materials is small, no organic fertilizer is applied or straw is returned to the field, so that the organic matter in the soil is insufficiently supplemented, the organic matter content of the soil is low, and the physical and chemical properties are deteriorated. Affect the activity of microorganisms , thus affecting the formation of soil aggregate structure, causing the soil acidity and alkalinity to be too large or too small, resulting in soil compaction; 3. Plastic waste polluted by mulch and plastic bags, etc. have not been cleaned up, and cannot be completely decomposed in the soil, forming harmful 4. Long-term single partial application of chemical fertilizers is seriously insufficient, heavy nitrogen and light phosphorus and potassium fertilizers, soil organic matter declines, humus cannot be replenished in time, causing soil compaction and cracks; 5. Repression, plowing and other farming The measures lead to the destruction of the upper soil structure due to the impact of mechanical tillage, which destroys the soil aggregate structure, and only part of the fertilizer applied to the soil every year is absorbed and utilized by the crops of the season, and the rest is fixed by the soil, forming a large amount of salt deposits, resulting in soil compaction; 6. Accumulation of harmful substances. Groundwater and industrial waste water in some places have high levels of toxic substances. Long-term irrigation, excessive accumulation of toxic substances will cause surface soil compaction; 7. Soil erosion caused by heavy rains. The soil structure is destroyed; and the clay and small particles are easy to form compaction after sedimentation and drying in the water accumulation place or the slow flow place

[0003] For farmers in the south, the arable land area is limited, so the arable land area of ​​each household is small, and the supply is in short supply. However, the repeated use of arable land makes the soil contain less and less organic matter, making the soil that has been used for a long time very prone to compaction Phenomenon, after compaction occurs, the number of small clay particles in the soil decreases, and it is difficult to be absorbed when watering or applying water-soluble fertilizers, and it is easy to lose before it can be absorbed in the future, making soil restoration difficult. Less efficient while resulting in higher repair costs

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