Greening method for dredger fill

Abstract

The invention relates to a greening method for dredger fill, which is characterized by comprising the following steps of: reforming a planting zone; paving a percolating layer; paving a blind pipe, paving sand or stove ash on the periphery of the blind pipe, and leading to a drainage sump or a drainage ditch; blending and mixing 1 / 4 to 1 / 3 of cow dung or straw with the dredged dredger fill, and refilling; performing irrigating and saline drainage, namely irrigating by flood water to reduce the salinity of soil; and regulating and controlling a microzone, namely dredging a planting cave or a planting ditch, and blending and mixing original soil and river sand, the cow dung and turfy soil in a ratio of 4:2:2:1 to improve the environment of the microzone in which nursery stocks grow and improve the survival rate of the nursery stocks. The greening method has the advantages that: the percolating layer and the blind pipe are paved, and the original soil and the straw or the cow dung are blended and mixed to be refilled so as to improve the voidage and permeability of the dredger fill and provide the possibility for further desalination; the salinity of the soil can be reduced effectively by flood-water irrigating, so that saline water is discharged from the percolating layer and the blind pipe; the regulation and control of the microzone is favorable for desalination and salt restraint, and can provide the environment and nutrient substances which are required by plant growth, so that the survival rate of the nursery stocks is over 90 percent.

Description

technical field [0001] The invention belongs to coastal saline-alkali land greening technology, in particular to a greening method for coastal saline-alkali land vegetation construction by blowing and filling soil. Background technique [0002] Dredger fill soil is new land soil such as dredging port construction, beach dredging fill, and salt pan dredging fill. There is no soil forming process, and the salt content is high. Generally, the salt content is above 10.0g / kg. The texture is heavy and the structure is poor. , the specific gravity and bulk density are large, the porosity and permeability coefficient are small, and the natural desalination rate is extremely poor. The surface is generally devoid of vegetation. Afforestation on dredger fill with no grass growing has always been an internationally recognized "worldwide problem". At present, most of the research reports on dredger fill are focused on how to find a more reasonable and economical reinforcement technolog...

AI Technical Summary

Problems solved by technology

[0003] The present invention is to overcome the deficiencies in the prior art and provide a greening method of dredger fill soil, aiming at high salt content, heavy texture, Poor structure, small porosity and permeability coefficient, extremely low natural desalination rate, difficult greening, and unsustainable existing greening methods. It is proposed to use technologies such as planting area transformation, irrigation salt washing, and micro-area regulation to reduce soil salinity and improve Porosity, inhibit soil anti-salt, improve the survival rate of seedlings, and achieve the purpose of efficient greening of the original soil