CN211240745U - Saline-alkali soil salt elimination and prevention ecological structure - Google Patents

Abstract

The utility model relates to a saline and alkaline land salt elimination, salt prevention ecological structure, including the saline and alkaline land, be provided with the salt elimination blind ditch in the saline and alkaline land, the subaerial metalling of grading, straw isolation layer, the planting soil layer of having laid in proper order from bottom to top of saline and alkaline land, the first thick bamboo tube that a plurality of interval is the same has been laid at the top of straw isolation layer, and the second thick bamboo tube that a plurality of interval is the same has been laid on the upper strata of first thick bamboo tube, and every second thick bamboo tube is located two adjacent first thick bamboo tube interval regions. Setting a graded crushed stone layer and a straw isolation layer to prevent underground saline-alkali water in the saline-alkali soil from entering a planting soil layer through capillary action; arranging a first bamboo tube and a second bamboo tube for storing rainwater or irrigation water seeped from the planting soil for plants planted in the planting soil to absorb and utilize; the first bamboo tube, the second bamboo tube and the straw forming the straw isolation layer are all obtained by natural plants, artificial chemical materials are not introduced, chemical pollution to soil is avoided, and the straw can be used as fertilizer after rotting.

Description

A saline-alkali soil discharge and salt control ecological structure

technical field

The utility model relates to the technical field of ecological restoration of saline-alkali land, in particular to an ecological structure for discharging salt and preventing salt in saline-alkali land.

Background technique

Coastal saline-alkali land greening technology is currently an important research hotspot in the fields of landscaping and ecological environment restoration. There are about 18,000 kilometers of coastal areas and islands along the coastal provinces, municipalities and autonomous regions of my country, and various types of coastal saline-alkali soils are widely distributed, with a total area of 50,000 square kilometers. The coastal area is one of the most economically developed areas in my country. The coastal areas such as Tianjin Binhai New Area, Liaoning Coastal Economic Belt, Shanghai Pudong New Area and Jiangsu Coastal Economic Belt have all been included in the national development strategy. The rapid development of cities has made the problem of greening in coastal areas particularly prominent. .

The coastal area has high soil salinity and high groundwater level. Plants can not survive by conventional methods, and greening is extremely difficult. With the existing physical, chemical and biological improvement measures, artificial chemical materials are generally introduced to cause land pollution.

Utility model content

The purpose of the utility model is to overcome the above problems existing in the prior art, and to provide an ecological structure for discharging salt and preventing salt in saline-alkali land.

In order to realize the above-mentioned technical purpose and achieve the above-mentioned technical effect, the present invention realizes through the following technical solutions:

A salt-discharging and salt-preventing ecological structure of a saline-alkali land, comprising a saline-alkali land, a salt-discharging underdrain is arranged in the saline-alkali land, and a graded gravel layer, a straw isolation layer, and a planting soil layer are sequentially laid on the ground of the saline-alkali land from bottom to top. Several first bamboo tubes with the same interval are laid on the top of the straw isolation layer, and several second bamboo tubes with the same interval are laid on the upper layer of the first bamboo tube, and each second bamboo tube is located between two adjacent first bamboo tubes. Above the area, the surface of the planting soil layer is piled up to form a raised arbor planting area, and one side of the arbor planting area is piled up to form a plurality of stepped shrub planting areas.

Further, both the first bamboo tube and the second bamboo tube are obtained by cutting a bamboo having a diameter of 5 to 8 cm in half along its axial direction, and the cut surfaces of the first bamboo tube and the second bamboo tube are upward.

Further, the surface of the shrub planting area is inclined from the side away from the nearest tree planting area to the side close to the nearest tree planting area.

Further, the surfaces of the tree planting area and the shrub planting area are covered with turf.

Further, the salt drain underdrain is filled with a filler mixed with graded crushed stone and coarse sand.

Further, the salt drain underdrain is located above the highest groundwater level.

The beneficial effects of the utility model are as follows: a graded gravel layer and a straw isolation layer are arranged to prevent the underground saline-alkali water in the saline-alkali land from entering the planting soil layer through capillary action; the first bamboo tube and the second bamboo tube are arranged for storing the seepage from the planting soil The rainwater or irrigation water under the planting soil is absorbed and utilized by the plants planted in the planting soil; the first bamboo tube, the second bamboo tube, and the straw constituting the straw isolation layer set in the planting structure are all obtained from natural plants, and no artificial chemical materials are introduced. Not only will it not cause soil chemical pollution, but it can also be used as fertilizer after decay.

Description of drawings

The accompanying drawings described here are used to provide further understanding of the present invention and constitute a part of the present application. The schematic embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

FIG. 1 is a schematic structural diagram of an embodiment of the present invention.

Detailed ways

The present utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "surrounding" It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, are constructed and operated in a specific orientation, and therefore cannot be understood as a reference to the present utility model. New type of restriction.

As shown in FIG. 1 , a saline-alkali land discharge and salt control ecological structure includes a saline-alkali land 1, and a salt-discharging underdrain 7 is provided in the saline-alkali land 1, and the salt-discharging underdrain 7 is located above the highest groundwater level, and the ground of the saline-alkali land 1 is from bottom to top. A graded gravel layer 2, a straw isolation layer 3, and a planting soil layer 6 are laid successively, and the top of the straw isolation layer 3 is laid with several first bamboo tubes 4 with the same interval, and the upper layer of the first bamboo tube 4 is laid with several Identical second bamboo tube 5 at interval, each second bamboo tube 5 is located in adjacent two first bamboo tube 4 interval area, and the arbor planting area 9 of a raised arbor planting area is formed by the accumulation of planting soil layer 6 surface, and one side of the arbor planting area 9 is piled up. A plurality of stepped shrub planting areas 10 are formed.

The graded gravel layer 2 and the straw isolation layer 3 are set to block the underground saline-alkali water in the saline-alkali land 1 from entering the planting soil layer 6 through capillary action; the first bamboo tube 4 and the second bamboo tube 5 are set for storage and seepage from the planting soil 6 The rainwater or irrigation water down is for the absorption and utilization of the plants planted in the planting soil 6; the first bamboo tube 4, the second bamboo tube 5, the straw that constitute the straw isolation layer 3 are all obtained by natural plants that are set in this planting structure, and do not introduce Artificial chemical materials not only do not cause soil chemical pollution, but also can be used as fertilizer after decay.

The first bamboo tube 4 and the second bamboo tube 5 are both obtained by cutting a bamboo having a diameter of 5 to 8 cm in half along its axial direction, and the cut surfaces of the first bamboo tube 4 and the second bamboo tube 5 are upward.

The surface of the shrub planting area 10 is inclined from the side away from the nearest arbor planting area 9 to the side close to the nearest arbor planting area 9 to avoid the confluence of rainwater or irrigation water to the low-lying area between two adjacent arbor planting areas 9 , causing rainwater or irrigation water to accumulate on the surface of the planting soil and volatilize and waste.

Arbors are planted in the tree planting area 9, and shrubs are planted in the shrub planting area 10. The surfaces of the tree planting area 9 and the shrub planting area 10 are paved with turf, and the turf plays a role in preventing soil erosion on the surface of the planting soil layer 6 on the one hand. , on the other hand to increase the level of planting plants.

The salt drain 7 is filled with a filler 8 mixed with graded crushed stone and coarse sand. First, the saline-alkali land 1 is first leveled, then a concave salt drain ditch is opened on the saline-alkali land 1, and then a filler 8 mixed with graded gravel and coarse sand is laid at the bottom of the salt drain ditch, and then the filler 8 Backfill the original soil from the excavation of the salt-draining ditch to the design elevation, and finally carry out the secondary leveling of the saline-alkali land to form a salt-draining underdrain 7 in the saline-alkali land.

In the description of this specification, description with reference to the terms "one embodiment", "example", "specific example", etc. means that a specific feature, structure, material or characteristic described in connection with the embodiment or example is included in the present invention. in at least one embodiment or example. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The basic principles, main features and advantages of the present invention are shown and described above. It should be understood by those skilled in the art that the present invention is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention The new model will also have various changes and improvements, which all fall within the scope of the claimed invention.

Claims (5)

1. The utility model provides a saline and alkaline land salt elimination, salt-proof ecological structure, includes saline and alkaline land, its characterized in that: be provided with the salt elimination underdrain in the saline and alkaline land, the subaerial graded broken stone layer, straw isolation layer, the planting soil layer of having laid in proper order from bottom to top of saline and alkaline land, the first thick bamboo tube that a plurality of interval is the same has been laid at the top of straw isolation layer, the second thick bamboo tube that a plurality of interval is the same has been laid on the upper strata of first thick bamboo tube, and every second thick bamboo tube is located two adjacent first thick bamboo tube interval regions, it piles up to form a bellied arbor kind district to plant the soil layer surface, and arbor kind one side in district is piled up and is formed the bush kind district of many step shapes.

2. The saline-alkali soil salt elimination and prevention ecological structure of claim 1, which is characterized in that: the first bamboo tube and the second bamboo tube are obtained by cutting bamboos with the diameters of 5-8 cm into halves along the axial direction of the bamboos, and the sections of the first bamboo tube and the second bamboo tube face upwards.

3. The saline-alkali soil salt elimination and prevention ecological structure of claim 1, which is characterized in that: the surface of the shrub planting area is inclined from a side away from the nearest tree planting area to a side close to the nearest tree planting area.

4. The saline-alkali soil salt elimination and prevention ecological structure of claim 1, which is characterized in that: turf is paved on the surfaces of the arbor planting area and the shrub planting area.

5. The saline-alkali soil salt elimination and prevention ecological structure of claim 1, which is characterized in that: the salt-removing underdrain is positioned above the highest underground water level.

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