CN113994785A - Method for transforming desert soil by simulating natural geological process of saline-alkali occurrence in arid region - Google Patents

Abstract

The invention relates to a method for reforming desert soil by simulating a natural geological process of saline-alkali occurrence in an arid region, which comprises the steps of building a high-level reservoir in an oasis-desert transition zone, and artificially introducing ecological water to form a fresh water tower water head; constructing a gentle slope land according to the terrain, doping sand, and applying organic fertilizer heavily to improve the soil of a plough layer; dividing suitable farmland and saline soil boundary lines according to the diving salt return critical depth and gradient, and improving soil by ridge culture, under-film drip irrigation and halophyte segmentation; repairing an alkali ditch, digging a dry salt removal pit, and driving soil water and salt to collect in a slope bottom drainage area; reasonably allocating halophyte windproof sand-fixing forest, reducing salt and improving soil, recovering vegetation and maintaining biological diversity of the system. A rural area-periodic salt return soil area-dry salt discharge and leakage separation belt system is constructed, a sustainable cultivated land is created for an extremely arid area, demonstration is provided for rebuilding an ecological barrier for preventing wind and fixing sand of oasis, and the production and ecological problems that the land is subjected to salt return and abandoned after the south transfer and reclamation of Xinjiang army are abandoned and the weather hazards of natural oasis degeneration, sand storm, sand raising and dust floating are serious are solved.

Description

Method for transforming desert soil by simulating natural geological process of saline-alkali occurrence in arid region

Technical Field

The invention belongs to the field of planting for improving saline-alkali soil in arid regions, and particularly relates to a method for modifying desert soil into a region suitable for farmland and oasis ecological barrier recovery.

Background

When the Xinjiang troops enter the south and the population moves, saline-alkali wasteland needs to be reclaimed, and the land development economy and the population stability are increased. However, due to serious salt return, a part of newly-cultivated land is forced to be abandoned, a northern technician with production experience cannot solve the problem of saline soil in southern Xinjiang with the successful experience of many years of abandonment and soil improvement of a stone river course field, and the subject group finds that the newly-cultivated land is mostly in the periphery of a reservoir with good water condition, along the riverway and in the low flood area due to the fact that water resources in southern Xinjiang are deficient compared with northern Xinjiang, and is all low-level land in the aspect of terrain, so that the saline-alkali return problem cannot be solved by the existing technologies such as alkali discharge ditches, hidden pipe salt discharge, vertical shaft salt discharge and the like under the influences that the exploitation of underground water and underground water level are continuously caused by surface water irrigation and the diving critical water level period is upwards. The land cultivated for years must be abandoned in the fields, which not only hits the economic confidence of the war group, but also brings ecological problems. Original vegetation damage, natural oasis degradation, perennial sand blown and floating weather brought by original and recent land development seriously affect the production and ecological environment of people in south Xinjiang.

Although the saline-alkali soil is spread over in the artificial oasis in Xinjiang, no matter the farmland or the green land, the crops or trees with low and flat land are better grown in the mountain land, the saline-alkali degree of the land is changed by the topography on the surface, and the natural geological process law of saline-alkali occurrence in arid regions is essentially included: the Xinjiang arid region has a special inland landform rule, mountain snow melt water is used as a water source, salt (salt rock weathered salt, soil residual salt and modern salt deposit) is continuously admitted to flow into the depression according to the slope on the way of forming runoff from a mountain region to flow to a basin, a landform unit of a mountain region, a Gobi, a mountain front inclined plain, a flung and surging fine soil plain (oasis, desert), a marsh and a salt lake is formed, and a saline-alkali gradient of a natural geological process is also formed.

Along with the development of the economic society of Xinjiang, the water resource demand is increased day by day, the natural ecological water is occupied, and the ecological environment problem caused by the water is prominent day by day. At present, in combination with the research results of the related subjects, experts generally consider that water consumption in ecological environment and social economy in northwest arid regions is preferably 50% each. The southern Xinjiang river runoff is characterized in that: the method has the advantages that the flood season is late, the summer water is concentrated, the winter water is large, and the ecological water in the rest season flows into the desert drainage areas at the periphery of the oasis area and the desert ecological areas at the downstream of the former river courses in a large amount, so that runoff in arid areas naturally fails and dissipates, and the disordered and low-efficiency management causes low and single vegetation coverage and is not beneficial to biodiversity.

Aiming at the problems, the subject group reasonably guides ecological water by combining the practice of improving soil by halophyte and applies the natural geological process rule of saline-alkali occurrence in arid regions to transform desert soil into a wind-proof and sand-fixing barrier which is sustainable and suitable for farmlands and oases, thereby providing demonstration for the development of desert soil into long-acting fertile farmlands, wind-proof and sand-fixing and maintaining the diversity of ecological systems in the south of the military community.

Disclosure of Invention

The invention aims to provide a method for reforming desert soil by simulating a natural geological process of saline-alkali occurrence in an arid region, which is characterized in that a high-level reservoir is built in a transition zone of a oasis desert, and ecological water is artificially introduced to form a 'fresh water tower' water head; constructing a gentle slope land according to the terrain, doping sand, and applying organic fertilizer heavily to improve the soil of a plough layer; dividing suitable farmland and saline soil boundary lines according to the diving salt return critical depth, and improving soil by ridge culture, drip irrigation under a film and saline plants in sections; repairing an alkali ditch, digging a dry salt removal pit, and driving soil water and salt to collect in a slope bottom drainage area; the halophyte windproof sand fixation forest is built, the evaporation of fresh water is reduced, salt is reduced, soil is improved, and an ecological system is maintained. A rural area-periodic salt return soil area-dry salt discharge capacity and leakage area zoning system is constructed, sustainable cultivated land is created for an extremely arid area, an ecological barrier for preventing wind and fixing sand of oases is reconstructed, and the problems of salt return and abandoned land after south transfer and wasteland reclamation of Xinjiang army and serious production and ecological problems of natural oasis degradation, sand storm, sand raising and dust floating weather hazards are solved.

The invention relates to a method for reconstructing desert soil by simulating a natural geological process of saline-alkali occurrence in an arid region, which comprises the following steps:

building a gentle slope land:

a. selecting desert soil at the periphery of the oasis, constructing a 10-degree gentle slope land (2) by machinery according to the terrain, doping 20% of sand by volume percent on the slope surface of 40cm, uniformly turning over and harrowing, applying 3000kg of decomposed cattle and sheep manure in each mu of rotary tillage, and implementing permeable and fertilized plough layer matrix improvement;

constructing a high-position reservoir at the top of the slope:

b. 1 water reservoirs (1) with the length of 300m, the width of 100m and the depth of 1.5m are built at the top of a gentle slope (2) every 300 mu, and a composite geomembrane is paved on the whole reservoir plate of each water reservoir (1); storing water in the flood discharge period during rest, supplementing the water by seasonal runoff ecological water, covering 1/3 on the water surface of the reservoir (1) with mutually connected carbonized bamboo chips, and dragging the carbonized bamboo chips along with seasons or sunlight;

planting in a gentle slope land by zones:

c. planning the gentle slope land (2) into a strip field with the length of 300 meters and the width of 150 meters;

in the first year, halophyte salt transfer: laying drip irrigation belts according to parallel contour lines with the spacing of 0.6m, and broadcasting the suaeda salsa along the drip irrigation belts; irrigating water immediately after sowing, irrigating water for 1 time every 2 days in the seedling emergence period, and the irrigation water is measured by the degree that a wetting peak reaches the central line of two adjacent drip irrigation belts; after seedling stage, water is supplemented when soil humidity is 15%, and irrigation amount is controlled at 150m each time³/hm²(ii) a In the vigorous growth period of the plants in 7-8 months, the irrigation amount is increased to wash the salt; harvesting Suaeda salsa in the late 10 months, and preparing silage rich in plant salt with feed corns;

in the second year, the gentle slope land (2) is improved in a subarea way: dividing a salinized area (5) and an agricultural area (4), calculating according to the submergence salt return critical depth of 3m and the slope of 10 degrees, wherein the salinized area (5) is a slow slope land and a dry salt removal pit (6) which are 15m below a boundary (3), and the agricultural area (4) is from the boundary (3) to the top of the slope;

planting halophytic green manure and salt-tolerant forage grass in the agricultural area (4): carrying out drip irrigation planting under a parallel contour line ridging film, wherein the ridge width is 50cm, the ridge height is 20cm, the ridge distance is 30cm, 1 row of feed corns and 1 row of sweet clovers are dibbled on the film, the corns are left to be high in stubble and harvested for silage, and the corn stubble and the sweet clovers are ground by a stalk-breaking machine and then are subjected to rotary tillage and returned to the field;

salinization area (5): planting suaeda salsa, laying drip irrigation belts according to parallel contour lines with the spacing of 0.6m, and broadcasting the suaeda salsa along the drip irrigation belts; irrigating water immediately after sowing, irrigating water for 1 time every 2 days in the seedling emergence period, and the irrigation water is measured by the degree that a wetting peak reaches the central line of two adjacent drip irrigation belts; after seedling stage, water is supplemented when soil humidity is 15%, and irrigation amount is controlled at 150m each time³/hm²(ii) a In the vigorous growth period of the plants in 7-8 months, the irrigation amount is increased to wash the salt; harvesting Suaeda salsa in the late 10 months, and preparing silage rich in plant salt with feed corns;

in the third year: cotton is planted in the suitable farming area (4), and the parallel contour lines are integrally carried out by ridging, drip irrigation tape laying, film mulching and sowing of a cotton seeder; planting halophytic vegetables in the salinized area (5), carrying out drip irrigation on the halophytic vegetables in parallel contour lines, broadcasting the halophytic vegetables in a saline land, harvesting fresh vegetables after leaving stubble 15cm away from the seedling height of about 35cm, and picking the fresh vegetables for multiple times before flowering;

after 3 years of improvement of salt absorption-salt eluviation of halophyte, salt eluviation of halophyte green manure fertilizer field and salt eluviation of pioneer crop radix rehmanniae preparata-salt eluviation, the suitable farming area (4) can realize high and stable yield field by implementing conventional crop rotation; the salinization area (5) selects halophyte for rotation according to the diving backwater range, and continuous desalting cultivation of soil is carried out;

constructing a dry salt discharge leakage area:

d. building alkali discharge ditches at intervals of 150m in the slope direction, wherein the alkali discharge ditches are parallel to the slope surface and have the depth of 2 m; a dry salt discharge pit (6) is dug at the bottom of the slope, the depth is 3 meters, the salt water of the alkali discharge ditch is collected, and the drawn salt water can be re-poured into the surrounding saline soil to form a saline soil agricultural mode for recycling the halophytes, the saline soil and the salt water;

building a windproof sand-fixation forest to maintain an ecological system:

e. fresh water tank forest belt: selecting local desert plants, vertically guiding the wind, and carrying out drip irrigation on mixed planting populus diversifolia and elaeagnus angustifolia forest belts at intervals of 3 meters from the front edge, along the slope and the bank of the reservoir (1);

dry salt removal pit (6) forest belt: according to the salt and drought resistance of succulent haloxylon plants, salt paw, haloxylon, tamarix hispida and haloxylon forest belts are built from inside to outside in a dry salt discharge pit (6), each belt is 5m wide and 3m apart, wind prevention, sand fixation, salt reduction and soil improvement are performed, and the diversity of ecological systems of a salinization area (5) and a farming area (4) is maintained.

The invention relates to a method for reconstructing desert soil by simulating a natural geological process of saline-alkali occurrence in an arid region, which is characterized by comprising the following steps:

in order to build an agricultural land applicable and wind and sand prevention and fixation barrier, an agricultural land applicable, a saline soil improvement area and a slope bottom dry salt discharge area are built by using fresh water and halophytes for sloping fields and ecology according to the diving salt return critical depth. A water head is provided by the high-level fresh water pool; the sloping field topography and the drip irrigation system provide driving force for water and salt migration; salt-shifting halophyte → green manure of halophyte → 3-5 rotation of pioneer crops, and can cultivate high-yield and stable-yield field suitable for farming; the fresh water pool is impervious, covered on the water surface and used for preventing the ineffective loss of fresh water by desert plants and windbreak forests; saline water in a dry salt discharge area at the slope bottom, a saline soil area and a halophyte forest belt form a recyclable saline soil agricultural system. Provides a technical scheme for preventing and treating natural oasis degradation, comprehensively utilizing water and soil natural resources, protecting environment and restoring ecology.

Aiming at the problems of salt return and abandoned land cultivation and serious production and ecology caused by natural oasis degradation, sandstorms, raised sands and floating dust weather hazards after south transfer and reclamation of Xinjiang war groups, simulating the natural geological process of saline-alkali occurrence in arid regions, absorbing the experience of farming of the oasis, guiding ecological water, and building a high-level reservoir in the peripheral desert soil of the oasis to form a 'fresh water tower' water head; constructing a gentle slope land according to the terrain, doping sand, and applying decomposed organic fertilizer to improve the plough layer soil; dividing suitable farming areas and salinized areas by the saltation critical depth of a diving position, improving gentle slope soil by sections by utilizing ridge culture, drip irrigation under a film and rotation of classified halophytes, and changing the spatial and temporal distribution of salt; repairing an alkali ditch and a dry salt discharge pit, and combining drip irrigation planting of a sloping field to drive soil water and salt to be collected to a slope bottom drainage area; the method is characterized by constructing a halophyte windproof sand fixation forest, reducing fresh water evaporation, reducing salt, improving soil, reconstructing vegetation and maintaining an ecological system. A zonation system of an agro-friendly and sweet soil area, a periodic salt return soil area and a dry salt discharge and discharge area is formed, so that an agro-friendly farmland is built, desert vegetation is recovered, and a demonstration is provided for creating sustainable cultivated land for arid areas and reconstructing and recovering ecological barriers of wind prevention and sand fixation of oasis.

Drawings

FIG. 1 is a schematic plan view of the present invention, wherein 1, a water reservoir; 2. a gentle slope land; 3. a boundary line; 4. suitable agricultural areas; 5. a salting area; 6. and (5) dry draining the salt pit.

Detailed Description

Examples

In 1999 and 2021, the invention carries out desert soil reconstruction tests at the periphery of 33 and 31 oases of second schs of the military group for production and construction in Xinjiang:

building a gentle slope land:

a. selecting desert soil at the periphery of the oasis, constructing a 10-degree gentle slope land 2 by machinery according to the terrain, doping 20% of sand by 40cm of slope according to volume percentage, uniformly turning over and harrowing, applying 3000kg of thoroughly decomposed cattle and sheep manure in each mu of rotary tillage, and implementing permeable and fertilized plough layer matrix improvement;

constructing a high-position reservoir at the top of the slope:

b. 1 water reservoir 1 with the length of 300m, the width of 100m and the depth of 1.5m is built at the top of 2 slopes of a gentle slope land every 300 mu, and a composite geomembrane is paved on the whole pool plate of the water reservoir 1; storing water in a flood discharge period during rest, supplying the water by seasonal runoff ecological water, covering 1/3 on the water surface of the water storage tank 1 with mutually connected carbonized bamboo chips, and moving the carbonized bamboo chips along with seasons or sunlight so as to reduce ineffective evaporation;

planting in a gentle slope land by zones:

c. the gentle slope land 2 is planned to be a strip field with the length of 300 meters and the width of 150 meters;

in the first year, halophyte salt transfer: laying drip irrigation belts according to parallel contour lines with the spacing of 0.6m, and broadcasting the suaeda salsa along the drip irrigation belts; irrigating water immediately after sowing, irrigating water for 1 time every 2 days in the seedling emergence period, and the irrigation water is measured by the degree that a wetting peak reaches the central line of two adjacent drip irrigation belts; after seedling stage, water is supplemented when soil humidity is 15%, and irrigation amount is controlled at 150m each time³/hm²(ii) a In the vigorous growth period of the plants in 7-8 months, the irrigation amount is increased to wash the salt; harvesting Suaeda salsa in the late 10 months, and preparing silage rich in plant salt with feed corns;

in the second year, the gradual slope land 2 is improved in subareas: dividing a salinized area 5 and an agricultural area 4, calculating by using the submergence return salt critical depth of 3m and the slope of 10 degrees, wherein the salinized area 5 is a slow slope land and a dry salt pit 6 with the boundary of 3-15 m below, and the agricultural area 4 is from the boundary of 3-3 to the top of the slope;

and (3) planting halophytic green manure and salt-tolerant forage grass in the suitable farming area 4: carrying out drip irrigation planting under a parallel contour line ridging film, wherein the ridge width is 50cm, the ridge height is 20cm, the ridge distance is 30cm, 1 row of feed corns and 1 row of sweet clovers are dibbled on the film, the corns are left to be high in stubble and harvested for silage, and the corn stubble and the sweet clovers are ground by a stalk-breaking machine and then are subjected to rotary tillage and returned to the field;

and (5) a salting area: planting suaeda salsa, laying drip irrigation belts according to parallel contour lines with the spacing of 0.6m, broadcasting the suaeda salsa along the drip irrigation belts, irrigating water immediately after sowing, irrigating water for 1 time every 2 days in the seedling emergence period, and the irrigation takes the degree that a wetting peak reaches the center line of two adjacent drip irrigation belts; after seedling stage, water is supplemented when soil humidity is 15%, and irrigation amount is controlled at 150m each time³/hm²(ii) a In the vigorous growth period of the plants in 7-8 months, the irrigation amount is increased to wash the salt; harvesting Suaeda salsa in the late 10 months, and preparing silage rich in plant salt with feed corns;

in the third year: cotton is planted in the suitable farming area 4, and the parallel contour lines are integrally carried out by ridging, drip irrigation tape laying, film mulching and sowing of a cotton seeder; planting halophytic vegetables in the salinized area 5, carrying out drip irrigation on the halophytic vegetables in parallel contour lines, broadcasting suaeda salsa, picking fresh vegetables after leaving stubble 15cm away from the seedling with the height of about 35cm, and picking the fresh vegetables for multiple times before flowering;

after 3 years of improvement of salt absorption-salt leaching of halophyte, salt leaching of halophyte green manure fertilizer land-salt leaching and salt leaching of pioneer crop radix rehmanniae preparata-salt leaching, the suitable farming area 4 can realize high and stable yield by implementing conventional crop rotation; selecting halophyte for rotation according to the diving backwater range in the salinized area 5, and continuously desalting and cultivating soil;

constructing a dry salt discharge leakage area:

d. building alkali discharge ditches at intervals of 150m in the slope direction, wherein the alkali discharge ditches are parallel to the slope surface and have the depth of 2 m; a dry salt discharge pit 6 is dug at the bottom of the slope, the depth is 3m, the salt water of the alkali discharge ditch is collected, and the drawn salt water can be re-filled into the surrounding saline soil to form a saline soil agricultural mode for recycling the halophyte, the saline soil and the salt water;

building a windproof sand-fixation forest to maintain an ecological system:

e. fresh water tank forest belt: selecting local desert plants, vertically guiding the wind, and carrying out drip irrigation on mixed planting populus diversifolia and oleaster forest belts at intervals of 3 meters from the front edge of the water storage tank 1 along a slope and a bank;

dry salt removal pit 6 forest belt: according to the salt and drought resistance of succulent haloxylon plants, salt paw, haloxylon, tamarix hispida and haloxylon forest belts are built from inside to outside in a dry salt discharge pit 6, the width of each belt is 5m, the interval is 3m, wind prevention and sand fixation, salt reduction and soil improvement are performed, and the diversity of ecological systems in a salinization area 5 and an agricultural area 4 is maintained.

The method of the invention shows that the desert soil reconstruction test result shows that: the salt-absorbing and salt-leaching of the halophytes in 2019, the salt-leaching of the halophytes in 2020, the fertilizing and salt-leaching of the halophytes in 2021, the yield of the cotton obtained from the middle-land farmland is 280 plus 350 kg/mu, and the goal of desalination and development from the desert soil to the fertile farmland is achieved through the rotation of the halophytes. In 2019 and 2021, the annual coverage of the suaeda salsa in the saline soil area reaches more than 80 percent; the coverage of the oasis barrier-vegetation reconstruction area is increased from 30% in 2019 to 65% in 2021, and the vegetation coverage is improved year by year along with the development of trees and shrubs and the development of biodiversity. The ecological water guided by manpower is reasonably utilized, and the saline soil resource is scientifically developed, so that the vegetation coverage of the desert is increased, and a high-yield farmland is created.

Claims (1)

1. A method for reforming desert soil by simulating a natural geological process of saline-alkali occurrence in arid regions is characterized by comprising the following steps:

building a gentle slope land:

a. selecting peripheral desert soil of oasis, and constructing 10 by machine according to terrain^°Slowly sloping fields (2), wherein the slope surface is 40cm, 20 percent of sand is mixed according to the volume percentage, 3000kg of decomposed cattle and sheep manure is applied in each mu of rotary tillage after the raking is turned evenly, and the improvement of permeable and fertilized plough layer matrix is implemented;

constructing a high-position reservoir at the top of the slope:

b. 1 water reservoirs (1) with the length of 300m, the width of 100m and the depth of 1.5m are built at the top of a gentle slope (2) every 300 mu, and a composite geomembrane is paved on the whole reservoir plate of each water reservoir (1); storing water in the flood discharge period during rest, supplementing the water by seasonal runoff ecological water, covering 1/3 on the water surface of the reservoir (1) with mutually connected carbonized bamboo chips, and dragging the carbonized bamboo chips along with seasons or sunlight;

planting in a gentle slope land by zones:

c. planning the gentle slope land (2) into a strip field with the length of 300 meters and the width of 150 meters;

in the first year, halophyte salt transfer: laying drip irrigation belts according to parallel contour lines with the spacing of 0.6m, and broadcasting the suaeda salsa along the drip irrigation belts; irrigating water immediately after sowing, irrigating water for 1 time every 2 days in the seedling emergence period, and the irrigation water is measured by the degree that a wetting peak reaches the central line of two adjacent drip irrigation belts; after seedling stage, water is supplemented when soil humidity is 15%, and irrigation amount is controlled at 150m each time³/hm²(ii) a In the vigorous growth period of the plants in 7-8 months, the irrigation amount is increased to wash the salt; harvesting Suaeda salsa in the late 10 months, and preparing silage rich in plant salt with feed corns;

in the second year, the gentle slope land (2) is improved in a subarea way: dividing a salinized area (5) and an agricultural area (4), calculating according to the submergence salt return critical depth of 3m and the slope of 10 degrees, wherein the salinized area (5) is a slow slope land and a dry salt removal pit (6) which are 15m below a boundary (3), and the agricultural area (4) is from the boundary (3) to the top of the slope;

planting halophytic green manure and salt-tolerant forage grass in the agricultural area (4): carrying out drip irrigation planting under a parallel contour line ridging film, wherein the ridge width is 50cm, the ridge height is 20cm, the ridge distance is 30cm, 1 row of feed corns and 1 row of sweet clovers are dibbled on the film, the corns are left to be high in stubble and harvested for silage, and the corn stubble and the sweet clovers are ground by a stalk-breaking machine and then are subjected to rotary tillage and returned to the field;

salinization area (5): planting suaeda salsa, laying drip irrigation belts according to parallel contour lines with the spacing of 0.6m, broadcasting the suaeda salsa along the drip irrigation belts, irrigating water immediately after sowing, irrigating water for 1 time every 2 days in the seedling emergence period, and the irrigation takes the degree that a wetting peak reaches the center line of two adjacent drip irrigation belts; after seedling stage, water is supplemented when soil humidity is 15%, and irrigation amount is controlled at 150m each time³/hm²(ii) a In the vigorous growth period of the plants in 7-8 months, the irrigation amount is increased to wash the salt; harvesting Suaeda salsa in the late 10 months, and preparing silage rich in plant salt with feed corns;

in the third year: cotton is planted in the suitable farming area (4), and the parallel contour lines are integrally carried out by ridging, drip irrigation tape laying, film mulching and sowing of a cotton seeder; planting halophytic vegetables in the salinized area (5), carrying out drip irrigation on the halophytic vegetables in parallel contour lines, broadcasting the halophytic vegetables in a saline land, harvesting fresh vegetables after leaving stubble 15cm away from the seedling height of about 35cm, and picking the fresh vegetables for multiple times before flowering;

after 3 years of improvement of salt absorption-salt eluviation of halophyte, salt eluviation of halophyte green manure fertilizer field and salt eluviation of pioneer crop radix rehmanniae preparata-salt eluviation, the suitable farming area (4) can realize high and stable yield field by implementing conventional crop rotation; the salinization area (5) selects halophyte for rotation according to the diving backwater range, and continuous desalting cultivation of soil is carried out;

constructing a dry salt discharge leakage area:

d. building an alkali discharge ditch at an interval of 150m in the slope direction, wherein the alkali discharge ditch is parallel to the slope surface and has a depth of 2m, a dry salt discharge pit (6) is dug at the bottom of the slope and has a depth of 3m, salt water in the alkali discharge ditch is collected, and the salt water can be pumped and can be re-poured into the surrounding saline soil, so that a saline soil agricultural mode for recycling halophytes, the saline soil and the salt water is formed;

building a windproof sand-fixation forest to maintain an ecological system:

e. fresh water tank forest belt: selecting local desert plants, vertically guiding the wind, and carrying out drip irrigation on mixed planting populus diversifolia and oleaster forest belts at intervals of 3 meters from the front edge of the reservoir (1), along a slope and a bank;

dry salt removal pit (6) forest belt: according to the salt and drought resistance of succulent haloxylon plants, salt paw, haloxylon, tamarix hispida and haloxylon forest belts are built from inside to outside in a dry salt discharge pit (6), each belt is 5m wide and 3m apart, wind prevention, sand fixation, salt reduction and soil improvement are performed, and the diversity of ecological systems of a salinization area (5) and a farming area (4) is maintained.

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