A landscape greening method and landscape tree species planting structure of coastal saline-alkali land based on biochar interlayer

Abstract

The invention provides a coastal saline-alkali land landscape greening method based on a biochar interlayer with a small amount of engineering and a high tree species survival rate, comprising the following steps: excavating a planting hole; paving and filling a sand layer of a certain thickness at the bottom of the planting hole; The surface is covered with a layer of geotextile; the geotextile is filled with a biochar component composed of biochar along the inner circumference of the planting hole; the biochar component is filled with planting soil; suitable tree species are planted; a certain thickness of biochar layer is laid on the surface around the tree ; Plant turf on the biochar layer on the surface. The present invention simultaneously provides a landscape tree species planting structure suitable for coastal saline-alkali land with simple structure, low cost and high tree species survival rate, which is a sand layer at the bottom of the planting hole dug on the coastal saline-alkali land, and the surface of the sand layer is covered with a A layer of geotextile has a biochar member made of biochar on the inner periphery, and the biochar member is planting soil for planting landscape tree species, and the top of the planting soil and the surface around the planting hole are biochar layers.

Description

technical field [0001] The invention belongs to the technical field of coastal saline-alkali landscaping greening, and specifically relates to an efficient and fast landscape greening method for coastal saline-alkali land based on a biochar interlayer, and a landscape tree species planting structure suitable for coastal saline-alkali land. [0002] technical background [0003] Coastal saline-alkali land is an important land resource in my country. There are 1.4×10 7 hm 2 , accounting for nearly 40% of the total area of ​​saline soil in my country. High salinity in tidal flats is the most important limiting factor for the utilization of regional land resources. Soil improvement must first reduce the salinity. Currently, the most common method of salt reduction is salt washing. That is, with the help of engineering techniques, the soil is rinsed with fresh water until the salinity of the surface soil is reduced to a lower range. The soil with reduced salinity is generall...

AI Technical Summary

Problems solved by technology

The reported pit-type tree planting method, although supplemented with soil improvement measures such as organic fertilizers and nutrient soil, lacks effective technology to prevent the soil from returning to salt, and the plants grow normally after planting for 1-2 years, but then they are slowly threatened to die and die. Occasionally, the survival rate is greatly reduced

In addition, some scholars have tried to plant trees using the alien soil ridge method. The obvious disadvantages of this technology are that the surface is highly undulating, the aesthetics are poor, and it is easy to accelerate soil erosion.

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