Comprehensive matching technology for constructing road shelter forests in heavy saline-alkali soil sections of coastal areas

Abstract

The invention discloses a comprehensive matching technology for constructing road shelter forests in heavy saline-alkali soil sections of coastal areas, which is characterized in that after high-specification platform field forming and soil preparation, plant materials of the shelter forests are planted after one year of land baring, field drying, freezing and soil improvement as well as one year of deep tillage, mature tillage and green manure planting. The comprehensive matching technology comprises the following concrete steps of: (1) constructing a trinity of forest network, road network and water network and integrating soil preparation measures of unit module platform field ditch engineering; (2) baring land, drying field, freezing and improving soil; (3) carrying out deep tillage and mature tillage and planting green manure; and (4) planting the plant materials of the shelter forests. By adopting the technology disclosed by the invention, the problems that plant materials of the road shelter forests is low in survival rate, the accumulation of salt in the surface soil is serious, the structure and the function are unstable and the like can be effectively solved; the survival rate and the preserving rate of trees are greatly increased; better efficacies of decreasing the alkali, restraining the salt, retaining the water, preserving the soil moisture, improving the air and the water permeability and increasing the soil nutrient are provided; and proved by the monitoring for continuous three years, the technology disclosed by the invention is suitable for the road shelter forests construction in the heavy saline-alkali soil sections of the coastal areas.

Description

technical field [0001] The invention belongs to the field of saline-alkali land improvement and comprehensive supporting construction of road shelterbelts, and in particular relates to a comprehensive supporting construction technology of road shelterbelts in heavily saline-alkali areas in coastal areas. Background technique [0002] The construction of road protection forests in saline-alkali land is different from general road greening and afforestation in saline-alkali lands. Due to factors such as secondary salinization of soil, insufficient natural precipitation, high evaporation ratio, and the cut-off of the Yellow River, the construction of road protection forests in this area has been at a low level. level, especially in areas above severe salinity, the construction of road shelterbelts in saline-alkali land has simple structure, single species, low survival rate, and low protective efficiency. The phenomenon of growth decline or even death makes it difficult to form...

AI Technical Summary

Problems solved by technology

[0002] The construction of road protection forests in saline-alkali land is different from general road greening and afforestation in saline-alkali lands. Due to factors such as secondary salinization of soil, insufficient natural precipitation, high evaporation ratio, and the cut-off of the Yellow River, the construction of road protection forests in this area has been at a low level. level, especially in areas above severe salinity, the construction of road shelterbelts in saline-alkali land has simple structure, single species, low survival rate, and low protective efficiency. The phenomenon of growth decline or even death makes it difficult to form an effective forest and cannot continuously and stably exert its protective effect

[0003] The current construction technology of road shelterbelts in saline-alkali land is relatively single, mainly based on deep plowing and land preparation, and then directly planting shelterbelt plant materials after flood irrigation and salt pressure

The existing problems are mainly as follows: (1) In the construction of traditional saline-alkali road protection forests, fresh water is used to press salt directly after deep plowing, and the drying time is short or even there is no drying process, which is prone to incomplete salt leaching, serious salt return and delayed soil maturation, etc. question

(2) In the construction of traditional road shelterbelts in saline-alkali land, after the fresh water depressurization of saline-alkali, most of the arbor tree species are directly planted. Due to the saline-alkali beach, the soil is alkalized and desertified, and the nutrient content is low, the arbor tree species are directly planted. It is easy to cause low underground vegetation coverage, large evaporation area, easy to return to salt, and soil nitrogen level and organic matter content are always at a low level. It is easy to cause low survival rate and poor growth of plant materials, and it is difficult to exert its protective effect

(3) Effective road protection forest construction in heavily saline-alkaline areas, such as the use of hidden pipes for alkali drainage and laying of salt barriers, requires high tree planting, high afforestation costs, cumbersome procedures, and difficult operation

(4) In the traditional method, the planting of plant materials is carried out directly after the land preparation of the terrace, and the trees can survive in a short period of time, but with the extension of time, secondary salinization is prone to occur, the soil fertility declines seriously, the survival rate of the trees decreases, and it is easy to A small old man tree is formed, and the protective effect is invalid

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