Method for planting Suaeda salsa in saturated heavily-salinized soil of arid area

Abstract

The invention relates to a method for planting Suaeda salsa in saturated heavily-salinized soil of an arid area, wherein a greening area and a drainage area are established according to terrains at first; plastic concealed conduits and an inverted filtering layer are laid and embedded in the greening area in order to reduce soil moisture and soil salinity; a drip irrigation zone is disposed; a shallow trench is excavated; grass charcoal soil is covered to provide a suitable matrix and a micro terrain environment for seed germination of the Suaeda salsa; and an intermittent low-salt environment is provided form germination of the Suaeda salsa and growth in a seedling period through drip irrigation. During a vegetative growth period, a ''Venturi'' drip fertigation device is used to apply water-soluble acid fertilizers, so that partial soil alkalinity is neutralized; available nutrients are provided; a breeding cycle can be completed in one year; and then the saturated salinized soil can be greened in a wild state in each later year. According to the method, a bald and heavily-salinized landscape with soil water saturation and ground surface salt encrustation can be changed; the ecologic environment is improved; and basically no reinvestment or maintenance is required at a later stage after one time of greening planting in order to realize natural greening. The method provides a technical model for the sustainable greening and beautification in an extreme environment of the arid area.

Description

technical field [0001] The invention provides a method for planting Suaeda salsa on saturated heavy saline soil in arid areas, relates to a method for greening saturated saline soil in arid areas by combining halophytes, drainage engineering, humus and drip irrigation, and belongs to the field of ecological planting. Background technique [0002] In an oasis in arid areas, water and salt are concentrated in low-lying places. These low-lying places are often located beside roads, parks, reservoirs, and edges of lakes. For landscaping, the selection and cultivation management of saline-alkali land greening materials are very important. Research on suitable plants and planting techniques is urgently needed. [0003] It is the wet halophytes that can be competent for the greening of saline soil. Suaeda salsa is resistant to salinity and barrenness, and can grow normally in a variety of environments when fresh or salt water is provided (salt content is less than 3.5% of seawater...

AI Technical Summary

Problems solved by technology

[0004] However, several greening practices have proved that the general method of this research group (CN102388730A, a method for planting Suaeda saline by drip irrigation in heavy saline-alkali land in arid areas) failed to be successfully planted in saturated saline soil, because the middle and upper layers of the soil Frequent or intermittent water stagnation, poor soil permeability, more water and less gas, accumulation of reducing substances, and insufficient available nutrients; soil surface condenses and light yellow salt crusts, making the germination of halophyte seeds face extreme environments exceeding seawater concentrations