Sylvicultural method on argillaceous saline soil

Abstract

The invention discloses a muddy saline soil forestation method. The method comprises the following steps: 1) digging drainage ditches (1) and building platform fields(15); 2) digging plant pits (3) for land preparation; 3) setting salt insulating layers (4) and basal discs (9) in the plant pits; 4) preparing sand loam soil; 5) filling the pits and transplanting the nursery stock; and 6) carrying out the fostering management. The method solves the problem of muddy saline soil forestation and greening. Through the measures of salt discharge and blockage, the method reduces the salt content in the range of the plant root system. The basal disc orientated rootage technology promotes the development of the root system, facilitates the nutrients and water absorption and unilateral salt discharge of the root system, and creates a soil environment benefiting the growth of the plant. The forestation method improves the survival rate and preservation rate of the nursery stock, and has lower cost than that of pure alien soil forestation. The method is suitable for the forestation and greening and vegetation restoration projects in the muddy saline alkali land, and can be applied to the artificial construction mixed with manual work and mechanical work.

Description

technical field [0001] The invention relates to a forestation method, in particular to a saline-alkali soil forestation method. Background technique [0002] The muddy saline soil has heavy sticky texture, large bulk density, small porosity, poor air permeability, poor water permeability, and high salt content. The argillaceous saline soil is mainly distributed in the northern coastal area. The coastal saline-alkali soil is rich in soluble salt. The salt content of the soil layer within one meter is generally above 0.4%, and the highest can reach 2-3%. Even if it develops into Various coastal salinized soils still maintain a salt content of more than 0.3% in the subsoil at different depths. [0003] At present, most of the muddy salt land has not been cultivated, and reed beaches are mostly formed. Only in the higher parts of the terrain are washed and planted with dry crops, or improved and utilized by methods such as paddy and dry rotation and jujube intercropping. Often...

AI Technical Summary

Problems solved by technology

Poor water and fertilizer supply capacity affects the absorption of water and nutrients by the root system;

[0007] (3) The water in muddy saline soil evaporates strongly, and the soluble salt often rises with the soil moisture, and will return to salt after evaporation, causing poor plant growth, or the root system grows to the soil layer with a salt content > 0.3%, causing plant damage and poor growth or die;

[0008] (4) The survival rate of muddy saline soil afforestation is low, the preservation rate is low, and the tree growth is slow;

[0009] (5) The engineering cost of afforestation in muddy saline soil is very high

Although the rain-collecting bed and salt-separating layer built in this afforestation method have the function of salt resistance, they cannot prevent the "salt return phenomenon" in which the salt moves upward to the water, and the soil salinity in the tree root system of the afforestation is greater than 0.3%. It is beneficial to the normal growth of trees, or even harmful to the growth of trees

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