CN110679354A - Water and fertilizer recycling system and water and fertilizer recycling method - Google Patents
Water and fertilizer recycling system and water and fertilizer recycling method Download PDFInfo
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- CN110679354A CN110679354A CN201911040937.0A CN201911040937A CN110679354A CN 110679354 A CN110679354 A CN 110679354A CN 201911040937 A CN201911040937 A CN 201911040937A CN 110679354 A CN110679354 A CN 110679354A
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/14—Greenhouses
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/24—Devices or systems for heating, ventilating, regulating temperature, illuminating, or watering, in greenhouses, forcing-frames, or the like
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/25—Greenhouse technology, e.g. cooling systems therefor
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Abstract
The invention provides a water and fertilizer recycling system and a water and fertilizer recycling method, and relates to the technical field of desert planting. Compared with the prior art, the water and fertilizer recycling system provided by the invention can provide a water and fertilizer recycling technology for desert facility agriculture on the basis of a conventional planting technical mode, and greatly improves the utilization efficiency of water and fertilizer.
Description
Technical Field
The invention relates to the technical field of desert planting, in particular to a water and fertilizer recycling system and a water and fertilizer recycling method.
Background
As the population is continuously and rapidly increased and the per capita cultivated land area is reduced, in order to realize economic development and social stability, the desert area in China starts to build the greenhouse in the desert area on a large scale. The greenhouse is built on a sand dune with a flattened periphery of an oasis, the culture medium is quicksand with the soil clay content lower than 5%, and the quicksand cannot provide a function of improving normal soil, so that the phenomenon of greenhouse vegetable growth nutrition barrier caused by the quicksand soil medium is very common. The sandy soil has poor water and fertilizer conservation capacity, water and fertilizer leakage, vegetables are easy to affect growth under the stress of water and fertilizer in production, a typical expression is that the vegetables have obvious water shortage symptoms when the irrigation interval time exceeds 3 days, and the irrigation interval time of normal soil is usually 10-15 days. In situations where the water supply is unstable, water shortage due to poor water and fertilizer holding capacity often has disastrous consequences for local facility agriculture. The cation exchange amount of sandy soil is low, the buffering capacity is poor, the fertilizer applied to the soil is easy to cause the leaching loss of the fertilizer under unreasonable irrigation conditions, the fertilizer is leached into the deep layer of the soil by irrigation water, root systems cannot be absorbed and utilized, and the vegetable nutrition obstacle is still common despite large fertilizing amount. Therefore, poor water and fertilizer conservation capacity caused by the sand culture medium is one of the important problems facing the development of local facility agriculture.
The existing method for improving the water and fertilizer utilization efficiency of the sandy soil mainly comprises the steps of improving the water and fertilizer storage capacity of the desert soil and taking a water and fertilizer integrated drip irrigation measure. The main common method for improving the water and fertilizer storage capacity of desert soil is the soil-bearing method, namely a method for replacing quicksand in a plough layer with high-quality soil. However, the method has the problems of difficult source of high-quality soil, large engineering quantity and high transportation and labor cost. And a method for preventing seepage sand is also adopted, namely a layer of seepage preventing sand is paved below a pure sand plough layer, and the seepage preventing sand is used for preventing the water from seeping downwards, so that the purpose of improving the utilization efficiency of the water and the fertilizer is achieved, but the method has the problems of high cost, high construction difficulty and non-ideal effect of the seepage preventing sand. Although the water and fertilizer integrated drip irrigation measures can improve the utilization efficiency of the water and fertilizer, the lifting range is limited, especially, the irrigation water with high salinity easily causes the problem of the salt accumulation of the cultivated layer under the drip irrigation condition, so that the water and fertilizer management in production faces the risk that the single irrigation amount is reduced, the utilization rate of the water and fertilizer can be improved, the risk of the salt accumulation of the soil of the cultivated layer and the risk of uneven irrigation are caused, and the single irrigation amount is increased, and the large amount of waste of the water and fertilizer resources is inevitably caused. The balance is difficult to grasp. The water and fertilizer recycling mode is commonly used in soilless matrix cultivation facility agriculture, and has the technical mode that environment control facilities and water and fertilizer automatic control equipment are extremely high in investment, the water quality requirement is high, reverse osmosis water purification equipment needs to be equipped, the operation cost is high, the technical requirement on operators is high, the technical level of the operators is seriously depended, timely diagnosis of PH, conductivity and the like is needed, the irrigation quantity and the supplied nutrient components are regulated and controlled, and the implementation possibility is avoided under the current economic level of desert facility agriculture areas and the current situation of the quality of workers.
Disclosure of Invention
The invention aims to provide a water and fertilizer recycling system which can realize water and fertilizer recycling, so that the agricultural water and fertilizer utilization efficiency of desert facilities is greatly improved, the construction and operation cost is low, and the current conventional greenhouse management mode is not influenced.
In order to achieve the above object, the present invention is achieved by the following technical means.
A water and fertilizer recycling system comprises a cultivation foundation pit, a diversion trench and a water return pool, wherein the diversion trench is arranged on one side of the cultivation foundation pit and is communicated with the cultivation foundation pit in a penetrating manner, the water return pool is communicated with the diversion trench, used for collecting water and fertilizer flowing out of the diversion trench, the bottom surface of the cultivation foundation pit forms an engineering base surface, a first impermeable geotextile is laid on the engineering base surface, a water seepage planting layer is filled on the first impermeable geotextile, the water seepage planting layer is used for planting crops and permeating water and fertilizer downwards to the surface of the first seepage-proof geotextile, one side of the engineering basal plane close to the diversion trench is lower than one side of the engineering basal plane far away from the diversion trench so as to lead the engineering basal plane to be obliquely and downwards arranged towards the diversion trench, and the water and fertilizer which is permeated to the surface of the first impermeable geotextile is guided to the guide groove.
In a preferred embodiment of the invention, a water suction pump is arranged in the water return pool, and the water suction pump is connected with an external circulation pipeline and is used for conveying the water and fertilizer in the water return pool into the external circulation pipeline.
In a preferred embodiment of the invention, the slope of the engineering ground plane is 1% to 1.5%.
In a preferred embodiment of the invention, the cultivation foundation pit is provided with a plurality of side walls, one of the side walls is close to the diversion trench, and the other side walls except the side wall close to the diversion trench are paved with second impermeable geotextiles.
In a preferred embodiment of the present invention, the first impermeable geotextile extends outwards to the bottom of the diversion trench.
In a preferred embodiment of the invention, the water seepage planting layer comprises a stone layer, a non-woven fabric and a cultivated sandy soil layer, the stone layer is laid on the first seepage-proof geotextile, the non-woven fabric is laid on the stone layer, and the cultivated sandy soil layer is laid on the non-woven fabric and is used for planting crops.
In a preferred embodiment of the invention, the thickness of the cultivated sandy soil layer is 50cm and the thickness of the stone layer is 5 cm.
A water and fertilizer recycling method is suitable for the water and fertilizer recycling system and comprises the following steps:
building the water and fertilizer recycling system;
planting fruits and vegetables on the water seepage planting layer;
irrigating and fertilizing the water seepage planting layer;
and pumping out the water and fertilizer collected in the water return pool and re-filling the water seepage planting layer.
In a preferred embodiment of the present invention, the step of constructing the water and fertilizer recycling system includes:
excavating 60cm of plough layer sandy soil in a planting area in the greenhouse to form a plough foundation pit and an engineering base floor;
flattening the engineering ground plane, and enabling the engineering ground plane to have a slope of 1% -1.5% of the lighting side;
sprinkling water to the engineering base surface to relatively harden the flowing sand base surface of the engineering base surface in a flowing state;
laying a first impermeable geotextile on the engineering base surface;
paving a second impermeable geotextile on the side wall of the cultivation foundation pit except the side close to the lighting side;
building a diversion trench outside the cultivation foundation pit close to the lighting side, so that water on the first impermeable geotextile can freely flow into the diversion trench;
paving a 5cm thick stone layer on the first impermeable geotextile in the cultivation foundation pit;
paving non-woven fabrics on the stone layer, and backfilling a cultivated sandy soil layer;
and a water return pool is built outside the diversion trench, and a water suction pump is arranged.
The invention has the following beneficial effects:
according to the water and fertilizer recycling system provided by the invention, the first anti-seepage geotextile is laid on the engineering base surface, the engineering base surface is obliquely and downwards arranged towards the diversion trench, the diversion trench is communicated with the cultivation foundation pit in a penetrating manner, and meanwhile, the diversion trench is communicated with the water return pool. When crops are planted actually, crops such as fruits and vegetables are planted on the water seepage planting layer, water and fertilizer are poured into the water seepage planting layer for fertilization, the water and fertilizer downwards seeps to the surface of the first anti-seepage geotextile along with the water seepage planting layer, the water and fertilizer on the surface of the first anti-seepage geotextile flows towards the diversion trench, the diversion trench collects the water and fertilizer and then sends the collected water and fertilizer into the water return pool for collection, the water and fertilizer collected in the water return pool can be reused in a manual or automatic mechanical extraction mode, for example, the water and fertilizer is poured into the water seepage planting layer again, and therefore cyclic utilization of the water and fertilizer is achieved. Compared with the prior art, the water and fertilizer recycling system provided by the invention can provide a water and fertilizer recycling technology for desert facility agriculture on the basis of a conventional planting technical mode, and greatly improves the utilization efficiency of water and fertilizer. Meanwhile, the greenhouse is good in compatibility with the existing greenhouse production mode, a greenhouse manager does not need to additionally learn a complex management technology, and leaked water and fertilizer can be sent into other greenhouses manually or mechanically to be reused. The operation cost is low, the fertilizer can be used for a long time of decades, and the continuous water and fertilizer synergistic benefit is obtained.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below.
Fig. 1 is a schematic view of a first perspective structure of a water and fertilizer recycling system provided in an embodiment of the present invention;
fig. 2 is a schematic view of a second perspective structure of the water and fertilizer recycling system provided in the embodiment of the present invention;
fig. 3 is a schematic view of a partial structure of the water and fertilizer recycling system in fig. 1.
Icon: 100-a water and fertilizer recycling system; 1-engineering ground plane; 2-a first impermeable geotextile; 3-a diversion trench; 4-a stone layer; 5-non-woven fabrics; 6-ploughing a sandy soil layer; 7-a water return pool; 8-a water pump; 9-cultivating the foundation pit; 10-water seepage planting layer; 11-a second impermeable geotextile; 12-plastic greenhouse; 13-external circulation line.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Some embodiments of the invention are described in detail below with reference to the accompanying drawings. Features in the embodiments described below may be combined with each other without conflict.
Examples
The embodiment provides a liquid manure cyclic utilization system, combines together with conventional big-arch shelter planting, can realize the cyclic utilization of liquid manure with the liquid manure of following planting soil layer seepage and collect again and utilize to promote desert facility agricultural liquid manure utilization efficiency by a wide margin.
Referring to fig. 1 to 3 in combination, the water and fertilizer recycling system 100 provided by the invention comprises a cultivation foundation pit 9, a diversion trench 3 and a water return tank 7, wherein the diversion trench 3 is arranged on one side of the cultivation foundation pit 9 and is communicated with the cultivation foundation pit 9 in a penetration manner, the water return tank 7 is communicated with the diversion trench 3, used for collecting water and fertilizer flowing out of the diversion trench 3, an engineering base surface 1 is formed on the bottom surface of the cultivation foundation pit 9, a first impermeable geotextile 2 is paved on the engineering base surface 1, a water seepage planting layer 10 is filled on the first impermeable geotextile 2, the water seepage planting layer 10 is used for planting crops and permeating the water and fertilizer downwards to the surface of the first impermeable geotextile 2, one side of the engineering base surface 1 close to the diversion trench 3 is lower than one side of the engineering base surface 1 far away from the diversion trench 3, so that the engineering base surface 1 is obliquely and downwards arranged towards the diversion trench 3 and is used for guiding the water and fertilizer which are permeated to the surface of the first impermeable geotextile 2 to the diversion trench 3.
In this embodiment, the cultivation foundation pit 9 is formed by directly digging a regular foundation pit on the ground, and a vinyl house 12 is provided outside the cultivation foundation pit 9. The specific structure, materials and the like of the plastic greenhouse 12 are the same as those of the existing fruit and vegetable planting greenhouse, and are realized by paving a plastic film on a steel frame, which can be referred to as the existing greenhouse structure.
It should be noted that, in this embodiment, one side of the cultivation foundation pit 9 is a lighting side, and the height of the plastic film on the lighting side is lower and is set according to the actual sunshine condition of the setting place, so that the fruits and vegetables on the water seepage planting layer 10 can receive the sunlight to the maximum extent. In the present embodiment, the diversion trench 3 is opened outside the cultivation foundation 9 on the side close to the lighting side.
The water and fertilizer recycling system 100 provided by this embodiment is not only suitable for desert areas, but also suitable for areas lacking fresh water, such as arid water-deficient areas like gobi, and has soil with strong leakage.
In this embodiment, the guiding gutter 3 is built for the brick-concrete structure, and the guiding gutter 3 comprises the barricade that two brick-concrete structures were built, and one of them inboard barricade has constituted a lateral wall that cultivates foundation ditch 9 and is close to the daylighting side simultaneously to a plurality of water conservancy diversion clearances have been seted up in the bottom, make cultivateing foundation ditch 9 and guiding gutter 3 can permeate the intercommunication, and then the liquid manure in the infiltration planting layer 10 can flow into the guiding gutter 3 along the water conservancy diversion clearance in cultivateing foundation ditch 9. The bottom of the other retaining wall on the outer side is provided with a diversion hole, and the water and fertilizer in the diversion trench 3 is introduced into the water return pool 7 through the diversion hole and collected. Of course, the diversion trench 3 may also use a pipeline to implement the diversion function, and the specific structure is not described herein again.
It should be noted that the term "permeate communication" in this embodiment means that the liquid manure can slowly flow through by means of permeate, and the liquid manure can flow from a high place to a low place although having a certain resistance. The term "communicating" as used in this embodiment refers to a flow with particularly little or no resistance.
In this embodiment, a water suction pump 8 is disposed in the water return pool 7, and the water suction pump 8 is connected to the external circulation pipeline 13 and is used for feeding the water and fertilizer in the water return pool 7 into the external circulation pipeline 13. Specifically, the external circulation pipes 13 are connected with each greenhouse or directly led into the water permeable planting layers 10. Through setting up suction pump 8, can send into the big-arch shelter of lack of water again with the water in the return water pond 7 automatically, it is very convenient.
In the present embodiment, the slope of the work bed 1 is 1% to 1.5%. Specifically, the slope of the work base surface 1 is 1.2%, and of course, the slope of the work base surface 1 may be adjusted according to actual conditions, and is not limited herein.
In this embodiment, the cultivation foundation pit 9 has a plurality of side walls, one of the side walls is close to the diversion trench 3, and the other side walls except the side wall close to the diversion trench 3 are paved with second impermeable geotextile 11. Specifically, the retaining wall of the diversion trench 3 forms the side wall of the cultivation foundation pit 9, the other side walls are all paved with second impermeable geotextile 11, and the water and fertilizer are prevented from running off through the other side walls through the second impermeable geotextile 11.
In this embodiment, the first impermeable geotextile 2 extends outwards to the bottom of the diversion trench 3. Specifically, the brick-concrete structure forming the diversion trench 3 is directly built and molded on the first impermeable geotextile 2, so that the first impermeable geotextile 2 extends to the diversion trench 3 from the bottom of the cultivation foundation pit 9, and the water and fertilizer leaking from the cultivation foundation pit 9 can flow into the reflux pool through the diversion trench 3.
In the embodiment, the water seepage planting layer 10 comprises a stone layer 4, a non-woven fabric 5 and a cultivated sandy soil layer 6, wherein the stone layer 4 is laid on the first seepage-proof geotextile 2, the non-woven fabric 5 is laid on the stone layer 4, and the cultivated sandy soil layer 6 is laid on the non-woven fabric 5 and is used for planting crops. The impermeable geotextile in the embodiment is a film-shaped fabric with a water blocking function, so that water permeation and soil erosion can be avoided.
It should be noted that the depth of the side of the cultivation foundation pit 9 close to the diversion trench 3 is 60cm, the thickness of the cultivated sandy soil layer 6 is 50cm, and the thickness of the pebble layer 4 is 5 cm. Specifically, the maximum depth of the cultivation foundation pit 9 is 60cm, and of course, the depth of the cultivation foundation pit 9 here may also be determined according to the requirement of the actual planted crop, for example, may be 70cm or 80cm, and the thickness of the stone layer 4 may also be determined according to the requirement of the actual planted crop. The cultivated sandy soil layer 6 is used for directly planting fruit and vegetable crops, and serves as a bearing main body for irrigation and fertilization, the pebble layer 4 serves as a base and plays a supporting role, meanwhile, in the process that water and fertilizer leak downwards through the non-woven fabric 5, the pebble layer 4 also plays a diversion role, and the water and fertilizer permeating into the pebble layer 4 can flow into the diversion trench 3 without resistance. The non-woven fabric 5 is used for isolating the stone layer 4 and the cultivated sandy soil layer 6, so that the two layers are prevented from being mixed with each other, and the water and soil loss of the cultivated sandy soil layer 6 is avoided.
The embodiment also provides a water and fertilizer recycling method, which is suitable for the water and fertilizer recycling system 100, reasonably utilizes the water and fertilizer recycling system 100, and realizes the recycling of the water and fertilizer, and specifically, the water and fertilizer recycling method comprises the following steps:
s1: a water and fertilizer recycling system 100 is constructed.
Specifically, before irrigation and fertilization, the water and fertilizer recycling system 100 is built in a greenhouse, cultivation is carried out according to a conventional planting method, the water and fertilizer recycling system is used for recycling irrigation and fertilization, and the utilization rate of water and fertilizer is improved.
S2: and planting fruits and vegetables on the water seepage planting layer 10.
Specifically, the water seepage planting layer 10 comprises a stone layer 4, a non-woven fabric 5 and a cultivated sandy soil layer 6, the stone layer 4 is laid on the first anti-seepage geotextile 2, the non-woven fabric 5 is laid on the stone layer 4, and the cultivated sandy soil layer 6 is laid on the non-woven fabric 5 and used for planting crops. And (3) taking soil from the cultivated sandy soil layer 6 on site, and directly planting fruits and vegetables on the cultivated sandy soil layer, wherein the planting method is consistent with the conventional planting method.
S3: and (5) irrigating and fertilizing the water-permeable planting layer 10.
Specifically, water is pumped by a water pump or is conveyed by a pipeline to the cultivated sandy soil layer 6, and meanwhile, fertilizer is applied, wherein the fertilizer can be chemical fertilizer or biological fertilizer.
S4: and pumping out the water and fertilizer collected in the water return pool 7 and re-filling the water-seepage planting layer 10.
Particularly, a water suction pump 8 is arranged in the water return pool 7, so that water and fertilizer collected in the water return pool 7 are pumped out and sent into the water-deficient greenhouse again through an external circulating pipeline 13, or the water-deficient greenhouse is directly refilled into the water seepage planting layer 10 in the current greenhouse.
In the present embodiment, step S1 includes the following sub-steps:
s11: and excavating 60cm of plough layer sandy soil in a planting area in the greenhouse to form a cultivation foundation pit 9 and an engineering base surface 1.
S12: and (3) flattening the engineering ground plane 1, and enabling the engineering ground plane 1 to have a slope of 1% -1.5% facing the lighting side.
S13: and (3) sprinkling water to the engineering base surface 1 to relatively harden the flowing sand base surface of the engineering base surface 1 in a flowing state.
S14: and laying a first impermeable geotextile 2 on the engineering base surface 1.
S15: and laying a second impermeable geotextile 11 on the side wall of the cultivation foundation pit 9 except the side close to the lighting side.
S16: and constructing a diversion trench 3 outside the cultivation foundation pit 9 close to the lighting side, so that water on the first impermeable geotextile 2 can freely flow into the diversion trench 3.
S17: and paving a stone layer 4 with the thickness of 5 centimeters on the first impermeable geotextile 2 in the cultivation foundation pit 9.
S18: and paving non-woven fabrics 5 on the stone layer 4, and backfilling a cultivated sandy soil layer 6.
S19: and a water return pool 7 is built outside the diversion trench 3, and a water suction pump 8 is arranged.
The water and fertilizer recycling system 100 is built through the above steps, and of course, parameters involved in the above steps can be adjusted according to actual planting requirements.
The embodiment also provides the following test examples, which supplement and explain the water and fertilizer recycling system 100 and the water and fertilizer recycling method provided by the embodiment.
Experiments were carried out in a certain desert area in 2019, and the cultivation areas in the experimental greenhouse for the experiments are as follows: 60.0m × 8.0 ═ 480m2The cucumbers are planted in the greenhouse, and the alfalfa is planted outside the greenhouse by using circulating water, and the alfalfa can be planted in other greenhouses. Planting management: culturing cucumber seedlings in 2019, 2 and 25 days, 3 and 20-24 days, preparing soil, cutting the soil, ridging, planting in 3 and 26 days, and managing the cucumber seedlings according to a management method of a high-yield cultivation regulation in the growth period; the first cucumber is hung after 29 days in 4 months, the first cucumber is hung after 18 days in 5 months, and the operation is finished after 18 days in 7 months. Measurement items and methods: the water filling amount and the circulating water amount entering the water return tank 7 each time are measured by a water meter; 300 ml of water sample is sampled from each time of circulating water, and the water sample is sent back to a laboratory for analyzing the nutrient concentration in the water sample.
The test results show that when the water consumption of the cucumbers in the season is 330 cubic meters, the water flowing into the water return tank 7 and entering the circulating system is 126 cubic meters, the cucumbers are fertilized with 57.4 kilograms of pure nutrients in total, and the amount of the pure nutrients flowing into the water return tank 7 and entering the circulating system is 18.5 kilograms. Calculated, in one cultivation season, the water utilization rate calculated by the total available water consumption is improved by 38.2 percent and the fertilizer utilization rate calculated by the total available fertilizer amount is improved by 32.2 percent through one-time water and fertilizer recycling.
TABLE 1 influence of water and fertilizer cyclic utilization technology on water and fertilizer utilization
| Cucumber in greenhouse | Alfalfa outside shed | |
| Water consumption (m3/field) | 330 | 0 |
| Wherein the circulating water quantity (m3/field) | 0 | 126 |
| Using amount of fertilizer (pure kg/field) | 57.4 | 0 |
| Wherein the amount of the circulating fertilizer (pure kg/m2) | 0 | 18.5 |
| Improved water utilization rate | 0 | 38.20％ |
| Increase of fertilizer utilization rate | 0 | 32.20％ |
It is noted that the above detailed description of the embodiments of the invention presented in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships conventionally put on the products of the present invention when used, and are only used for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," "mounted," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A water and fertilizer recycling system is characterized by comprising a cultivation foundation pit, a diversion trench and a water return pool, the diversion trench is arranged at one side of the cultivation foundation pit and is communicated with the cultivation foundation pit in a penetrating way, the water return pool is communicated with the diversion trench, used for collecting water and fertilizer flowing out of the diversion trench, the bottom surface of the cultivation foundation pit forms an engineering base surface, a first impermeable geotextile is laid on the engineering base surface, a water seepage planting layer is filled on the first impermeable geotextile, the water seepage planting layer is used for planting crops and permeating water and fertilizer downwards to the surface of the first seepage-proof geotextile, one side of the engineering basal plane close to the diversion trench is lower than one side of the engineering basal plane far away from the diversion trench so as to lead the engineering basal plane to be obliquely and downwards arranged towards the diversion trench, and the water and fertilizer which is permeated to the surface of the first impermeable geotextile is guided to the guide groove.
2. The water and fertilizer recycling system of claim 1, wherein a water pump is arranged in the water return pool, and the water pump is connected with an external circulation pipeline and used for sending the water and fertilizer in the water return pool into the external circulation pipeline.
3. The water and fertilizer recycling system of claim 1, wherein the slope of the project floor surface is 1% -1.5%.
4. The liquid manure recycling system of claim 1, wherein the cultivation foundation pit has a plurality of side walls, one of the side walls is adjacent to the diversion trench, and a second impermeable geotextile is laid on the other side walls except the side wall adjacent to the diversion trench.
5. The liquid manure recycling system of claim 1, wherein the first impermeable geotextile extends outward to the bottom of the diversion trench.
6. The water and fertilizer recycling system of claim 1, wherein the water seepage planting layer comprises a stone layer, a non-woven fabric and a cultivated sandy soil layer, the stone layer is laid on the first seepage-proof geotextile, the non-woven fabric is laid on the stone layer, and the cultivated sandy soil layer is laid on the non-woven fabric and is used for planting crops.
7. The water and fertilizer recycling system of claim 6, wherein the thickness of the cultivated sandy soil layer is 50cm and the thickness of the stone layer is 5 cm.
8. A water and fertilizer recycling method suitable for the water and fertilizer recycling system as claimed in any one of claims 1 to 7, comprising the steps of:
building the water and fertilizer recycling system;
planting fruits and vegetables on the water seepage planting layer;
irrigating and fertilizing the water seepage planting layer;
and pumping out the water and fertilizer collected in the water return pool and re-filling the water seepage planting layer.
9. The method of claim 8, wherein the step of constructing the water and fertilizer recycling system comprises:
excavating 60cm of plough layer sandy soil in a planting area in the greenhouse to form a plough foundation pit and an engineering base floor;
flattening the engineering ground plane, and enabling the engineering ground plane to have a slope of 1% -1.5% of the lighting side;
sprinkling water to the engineering base surface to relatively harden the flowing sand base surface of the engineering base surface in a flowing state;
laying a first impermeable geotextile on the engineering base surface;
paving a second impermeable geotextile on the side wall of the cultivation foundation pit except the side close to the lighting side;
building a diversion trench outside the cultivation foundation pit close to the lighting side, so that water on the first impermeable geotextile can freely flow into the diversion trench;
paving a 5cm thick stone layer on the first impermeable geotextile in the cultivation foundation pit;
paving non-woven fabrics on the stone layer, and backfilling a cultivated sandy soil layer;
and a water return pool is built outside the diversion trench, and a water suction pump is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911040937.0A CN110679354A (en) | 2019-10-30 | 2019-10-30 | Water and fertilizer recycling system and water and fertilizer recycling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911040937.0A CN110679354A (en) | 2019-10-30 | 2019-10-30 | Water and fertilizer recycling system and water and fertilizer recycling method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113973558A (en) * | 2021-09-16 | 2022-01-28 | 昆明学院 | Facility agriculture pollution prevention and control type water and fertilizer recycling technology |
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| CN110249849A (en) * | 2019-07-30 | 2019-09-20 | 福建省农业科学院土壤肥料研究所 | A kind of liquid manure recycling device system |
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| CN101849453A (en) * | 2009-04-04 | 2010-10-06 | 高清 | Earth surface planting desert reforming technology |
| CN203675767U (en) * | 2014-01-03 | 2014-07-02 | 通海锦海农业科技发展有限公司 | Flower seedbed circulating sprinkling irrigation system |
| CN204163062U (en) * | 2014-09-25 | 2015-02-18 | 王营杰 | Farmland circulating utilization device |
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| CN113973558A (en) * | 2021-09-16 | 2022-01-28 | 昆明学院 | Facility agriculture pollution prevention and control type water and fertilizer recycling technology |
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