System and method for improving saline-alkali soil by functional area aggregates

Abstract

The invention provides a system and method for improving saline-alkali soil by functional area aggregates. The functional area aggregates are divided into three large functional areas, which are an anti-salt-return area, a saline-alkali soil salt elimination area and an auxiliary functional area respectively. The anti-salt-return area is mainly a plant planting area; a salt elimination ditch is mainly distributed in the saline-alkali soil salt elimination area; and the auxiliary functional area comprises a barley pest culture area, a recycled water area and a renewable energy area. The saline-alkali soil salt elimination area can effectively and integrally reduce the saline content of the saline-alkali soil, the anti-salt-return area can effectively prevent salt return of the saline-alkalisoil, and finally the auxiliary functional area not only can supply water and energy resources to another two functional areas, but also can supply organic fertilizer to the anti-salt-return area. The three functional areas work synergistically to form a whole, and the resources are shared mutually. The running cost of the saline-alkali soil is effectively reduced and the efficiency is improved.

Description

technical field

[0001] The invention relates to the fields of preventing saline-alkali land from returning to salt and multifunctional ecological areas, and provides a system and method for improving saline-alkali land through aggregates of functional areas. Background technique

[0002] China's coastal areas have a developed economy, a high level of urbanization, a large population density, and dense urban agglomerations, which are priority development and key development areas. Tidal flat reclamation and sea reclamation are important land reserve resources for economic and social development in coastal areas. However, its soil salt content is as high as 6.0g·kg -1 The above is not conducive to the growth of plants, which not only makes the reclamation of tidal flats and the greening of new land reclamation from the sea an internationally recognized "worldwide problem", but also the biggest "bottleneck" in the ecological environment construction and economic and social dev...

Examples

Embodiment 1

[0031] Such as figure 1 As shown, (1) Anti-return salt area 1:

[0032] Anti-salt return zone 1 is set at 10 meters from the sea, and a buffer zone of sand and soil is reserved to prevent backflow of seawater. Then, according to the size of the plant planting area, a water ditch with a width and depth of 0.5 m is set every 4 m in the horizontal and radial directions, and a drainage ditch 11 with a width and depth of 1 m is excavated outside the plant planting area. And drainage ditch 11 can be used to conserve water sources such as rainwater at ordinary times, and use as water inlet ecology. Suaeda salsa is planted in the planting area, and the number of plants planted in a single season per mu is controlled at 2,000 until the total soil salt is reduced to the target value. The stem parts of the planted Suaeda salsa are used to feed the barley worms in the auxiliary function area. The water inlet pump 12 is set to be connected with the sump 32 of the auxiliary function area ...

Embodiment 2

[0041] Such as figure 1 As shown, (1) Anti-return salt area 1:

[0042] Anti-salt return zone 1 is set 20 meters away from the sea, and a buffer zone of sand and soil is reserved to prevent backflow of seawater. Then according to the size of the plant planting area, a water ditch with a width and depth of 0.8 m is set at every interval of 6 m in the horizontal and radial directions, and a drainage ditch 11 with a width and depth of 1.2 m is excavated outside the plant planting area. Ditch and drainage ditch 11 can be used to conserve water sources such as rainwater at ordinary times, and use as water inlet ecology. Suaeda salsa is planted in the planting area, and the number of plants planted in a single season per mu is controlled at 2,500 until the total soil salt is reduced to the target value. The stem part of the planted Suaeda salsa is used to feed the barley worms in the auxiliary function area. The water inlet pump 12 is set to be connected with the sump 32 of the au...

Embodiment 3

[0051] Such as figure 1 As shown, (1) Anti-return salt area 1:

[0052] The anti-salt return area 1 is set 30 meters away from the sea, and a buffer zone of sand and soil is reserved to prevent backflow of seawater. Then according to the size of the plant planting area, a water ditch with a width and depth of 1 m is set at every interval of 7 m in the horizontal and radial directions, and a drainage ditch 11 with a width and depth of 1.5 m is excavated outside the plant planting area. And drainage ditch 11 can be used to conserve water sources such as rainwater at ordinary times, and use as water inlet ecology. Suaeda salsa is planted in the planting area, and the number of plants planted in a single season per mu is controlled at 3,000 until the total soil salt is reduced to the target value. The stem parts of the planted Suaeda salsa are used to feed the barley worms in the auxiliary function area. The water inlet pump 12 is set to be connected with the sump 32 of the auxi...

technical field

[0001] The invention relates to the fields of preventing saline-alkali land from returning to salt and multifunctional ecological areas, and provides a system and method for improving saline-alkali land through aggregates of functional areas. Background technique

[0002] China's coastal areas have a developed economy, a high level of urbanization, a large population density, and dense urban agglomerations, which are priority development and key development areas. Tidal flat reclamation and sea reclamation are important land reserve resources for economic and social development in coastal areas. However, its soil salt content is as high as 6.0g·kg -1 The above is not conducive to the growth of plants, which not only makes the reclamation of tidal flats and the greening of new land reclamation from the sea an internationally recognized "worldwide problem", but also the biggest "bottleneck" in the ecological environment construction and economic and social dev...

Examples

Embodiment 1

[0031] Such as figure 1 As shown, (1) Anti-return salt area 1:

[0032] Anti-salt return zone 1 is set at 10 meters from the sea, and a buffer zone of sand and soil is reserved to prevent backflow of seawater. Then, according to the size of the plant planting area, a water ditch with a width and depth of 0.5 m is set every 4 m in the horizontal and radial directions, and a drainage ditch 11 with a width and depth of 1 m is excavated outside the plant planting area. And drainage ditch 11 can be used to conserve water sources such as rainwater at ordinary times, and use as water inlet ecology. Suaeda salsa is planted in the planting area, and the number of plants planted in a single season per mu is controlled at 2,000 until the total soil salt is reduced to the target value. The stem parts of the planted Suaeda salsa are used to feed the barley worms in the auxiliary function area. The water inlet pump 12 is set to be connected with the sump 32 of the auxiliary function area ...

Embodiment 2

[0041] Such as figure 1 As shown, (1) Anti-return salt area 1:

[0042] Anti-salt return zone 1 is set 20 meters away from the sea, and a buffer zone of sand and soil is reserved to prevent backflow of seawater. Then according to the size of the plant planting area, a water ditch with a width and depth of 0.8 m is set at every interval of 6 m in the horizontal and radial directions, and a drainage ditch 11 with a width and depth of 1.2 m is excavated outside the plant planting area. Ditch and drainage ditch 11 can be used to conserve water sources such as rainwater at ordinary times, and use as water inlet ecology. Suaeda salsa is planted in the planting area, and the number of plants planted in a single season per mu is controlled at 2,500 until the total soil salt is reduced to the target value. The stem part of the planted Suaeda salsa is used to feed the barley worms in the auxiliary function area. The water inlet pump 12 is set to be connected with the sump 32 of the au...

Embodiment 3

[0051] Such as figure 1 As shown, (1) Anti-return salt area 1:

[0052] The anti-salt return area 1 is set 30 meters away from the sea, and a buffer zone of sand and soil is reserved to prevent backflow of seawater. Then according to the size of the plant planting area, a water ditch with a width and depth of 1 m is set at every interval of 7 m in the horizontal and radial directions, and a drainage ditch 11 with a width and depth of 1.5 m is excavated outside the plant planting area. And drainage ditch 11 can be used to conserve water sources such as rainwater at ordinary times, and use as water inlet ecology. Suaeda salsa is planted in the planting area, and the number of plants planted in a single season per mu is controlled at 3,000 until the total soil salt is reduced to the target value. The stem parts of the planted Suaeda salsa are used to feed the barley worms in the auxiliary function area. The water inlet pump 12 is set to be connected with the sump 32 of the auxi...

Images