CN108298702A - A kind of tea place concentration development zone runoff treatment system - Google Patents

A kind of tea place concentration development zone runoff treatment system Download PDF

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Publication number
CN108298702A
CN108298702A CN201810343141.1A CN201810343141A CN108298702A CN 108298702 A CN108298702 A CN 108298702A CN 201810343141 A CN201810343141 A CN 201810343141A CN 108298702 A CN108298702 A CN 108298702A
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China
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ecological
water
ditch
outlet canal
denitrification
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CN201810343141.1A
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Chinese (zh)
Inventor
马书占
陈开宁
李恒鹏
黄蔚
古小治
刘成
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Nanjing Institute of Geography and Limnology of CAS
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Nanjing Institute of Geography and Limnology of CAS
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Priority to CN201810343141.1A priority Critical patent/CN108298702A/en
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/34Biological treatment of water, waste water, or sewage characterised by the microorganisms used
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/32Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/001Runoff or storm water
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2203/00Apparatus and plants for the biological treatment of water, waste water or sewage
    • C02F2203/006Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2203/00Apparatus and plants for the biological treatment of water, waste water or sewage
    • C02F2203/008Mobile apparatus and plants, e.g. mounted on a vehicle
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00Controlling or monitoring parameters in water treatment
    • C02F2209/16Total nitrogen (tkN-N)

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  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Engineering & Computer Science (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Biotechnology (AREA)
  • Botany (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)

Abstract

The present invention relates to a kind of tea places to concentrate development zone runoff treatment system, including denilrification system and ecological purification system;Denilrification system includes four sides wall denitrification ditch made of, is equipped with packing layer and outlet canal in denitrification ditch, is separated by the second wall between packing layer and outlet canal;Outlet canal forms difference in height along the external and internal wall upper surface of water (flow) direction, and rainwash is made to be flowed out from outlet canal;The ecological purification system includes the ecological purification pool;Ecological floating island, ecological revetment and water purification plant are equipped in the ecological purification pool;Rainwash flows into water body after the ecological purification pool purifies.The system of the present invention can make full use of tea place that the existing feature in development zone and the self-purification capacity of plant, adaptation to local conditions is concentrated to realize the double goal of pollutant fluxes and landscape grace;And system structure is simple, and it is easy to implement, significant effect is cut down, maintenance cost is low.

Description

A kind of tea place concentration development zone runoff treatment system
Technical field
The present invention relates to field of surface source pollution control technology, and in particular to a kind of tea place concentration development zone runoff treatment System.
Background technology
Tea place is one of important sources of pollution of area source, and the nitrogen discharge intensity in studies have shown that tea place is arable land, builds and use 2 times of ground, 3 times of bare area, be 8.8 times of nature forest land;Phosphorus loss intensity is 8 times of nature forest land, therefore natural forest land is opened Hair, which will be tea place, to cause nitrogen and phosphorus pollution to increase considerably, this is that the serious major reason of development zone nitrogen and phosphorus pollution is concentrated in tea place. Tea place concentrate exploitation area surface source pollution irrigation canals and ditches are mainly entered by seepage flow in surface erosion and earth, eventually enter into lake, reservoir or It is pond.Development zone rainwash specific features are concentrated to be mainly shown as in tea place:1. nitrogen and phosphorus content is exceeded, confluence enters apart from short River, lake or reservoir ratio are high;2. tea place coverage is low, especially rainy season coverage is low, and fertilizer conservation, water holding capacity are poor, runoff Pollution is lost in serious;3. the tea hill gradient is larger, rain drop erosion great efforts, silt and phosphorus pollution are lost in seriously.Therefore, it effectively removes It is the major issue of current urgent need to resolve that the pollutant in the rainwash of development zone is concentrated in tea place.
Currently, the control technology for rainwash is focused primarily upon to rural and agricultural rainwash, city overland runoff With forest rainwash etc..A kind of Landscape Park formula runoff treatment is proposed in patent document 201210050879.1 System is made of the landscape ecological pool, runoff treatment landscape soil, ecology shunting irrigation canals and ditches and park affiliated facility, is primarily adapted for use in Rural and agricultural runoff and urban runoff;A kind of city overland runoff filtering system is proposed in patent document 201510316974.5 System, including three mud chamber, filtering type and drip chamber parts;A kind of utilize is proposed in patent document 201510844719.8 to give birth to The method that state ditch intercepts forest rainwash, means are to intercept rainwash using ecological ditch to conserve water and soil;Patent document A kind of small watershed agricultural surface runoff pollutant control system tea is proposed in 201611050884.7, mainly by diversion system, Four setting pot, artificial swamp and oxidation pond parts form.In conclusion existing control technology is more directed to agricultural runoff And city overland runoff, lack the reduction that rainwash pollution in development zone is concentrated to tea place, meanwhile, existing control technology cannot expire Interception and processing of the foot to tea place concentration development zone rainwash pollution, therefore, exploitation are a kind of for tea place concentration development zone Table runoff treatment technique is particularly important.
Based on above-mentioned technical background, present invention is generally directed to tea places to concentrate development zone rainwash, concentrate and open according to tea place Area differently band Eco-hydrological condition and source, Distribution Pattern of converging are sent out, tea place is made full use of to concentrate the existing feature in development zone and plant Self-purification capacity, adaptation to local conditions combines existing various technological means, to reach the dual purpose of pollutant fluxes and landscape grace, Meet the growing environmental requirement of people.
Invention content
To solve to lack the process problem for concentrating tea place development zone rainwash in prior art, the purpose of the present invention exists In providing a kind of tea place concentration development zone runoff treatment system, it can effectively intercept tea place and concentrate development zone rainwash Pollutant mitigates tea place and concentrates the pollution of development zone rainwash.
What the above-mentioned purpose of the present invention was realized in:
A kind of tea place concentration development zone runoff treatment system, including denilrification system and ecological purification system;
The denilrification system includes denitrification ditch, and the denitrification ditch is rectangle ditch, is surround and is formed by four sides wall;
It is equipped with packing layer and outlet canal in denitrification ditch, is separated by the second wall between packing layer and outlet canal;Outlet canal is along water The external and internal wall upper surface for flowing direction forms difference in height, and rainwash is made to be flowed out from outlet canal;
Described filler layer is three-decker, and underfilling is haydite;Middle filler is corncob, sawdust and rice husk, and adulterates pottery Grain;Upper layer is nylon wire and covering with new soil;The second wall bottom opening so that underfilling is connected to outlet canal;Earth's surface Runoff flows into after packing layer enters outlet canal through underfill layer, enters ecological purification system after outlet canal outflow;
The ecological purification system includes the ecological purification pool;Ecological floating island, ecological revetment and net are equipped in the ecological purification pool Water plant;Rainwash flows into water body after the ecological purification pool purifies.The ecological purification pool is related to ecological revetment, water plant Restore and three kinds of technological means of ecological floating island carry out coupling purification and pollute water quality, can also be other technological means to purify water, Improve ditch pool system water ecological condition by various suitable means, promotes the system delay of the ditch pool, precipitation, nitrogen and phosphorus pollution of degrading Ability realizes that runoff pollution intercepts purification, and the pollution of development zone rainwash is concentrated in final tea place of cutting down.
Further, the denitrification ditch is built in tea hill hillside slope foot according to terrain;Denitrification ditch side wall Close to the ecological purification pool, other side wall is close to tea hill.According to the extreme terrain of tea place concentration zones, in tea hill hillside slope foot and life Denitrification ditch is built between state purifying pond, the feature that slope foot soil water content can be utilized high supplements carbon by denitrification ditch Source promotes the ability of denitrification degradation polluted by nitrogen.
Further, in the wall, inlet end wall and close tea hill side wall are Nylon ring ligaton;Close to raw The side wall and outlet canal wall of state purifying pond are that concrete is brick;Thickness of wall body is 25-30cm.
Further, described filler layer depth is 1.0-1.2m;Underfilling is haydite, depth of cracking closure 10-15cm;Middle level Filler is corncob, sawdust, rice husk, wherein adulterating a small amount of haydite, corncob, sawdust, rice husk and haydite filling proportion are 5:1, Middle filler depth of cracking closure 80-100cm, upper layer are nylon wire and covering with new soil, and nylon wire is laid on middle filler, depth 5- 10cm, covering with new soil is on nylon wire, depth 5-10cm.Middle filler corncob, sawdust, rice husk provide organic carbon source, doping A small amount of haydite increases porosity, makes to be not easy to plug inside denitrification ditch;Upper layer is after covering with new soil prevents rain drop erosion and is convenient for Phase serike.It is free water layer in described filler layer, Free water layer height is 15-20cm.
Further, the ecological revetment is that the earthwork generated using structure denitrification ditch is built in ecological purification pool bank band Bank slope forms, and slope is than 1:2-1:3, width 3-5m.
Further, the water purification plant includes the emergent aquactic plant being planted on shore protection and emergent aquactic plant outer phytal zone The submerged plant planted at the 0.5-2.0m depth of waters;The emergent aquactic plant be selected from reed, hay grass, cattail, 10-15 plants of planting density/ m2;Submerged plant is selected from water caltrop, eel grass, black algae, water buttercup, cover degree 50-60%.Emergent aquactic plant water preferably on the bank slope of build It is planted within deep 0.5m.Emergent aquactic plant planting patterns is seedling replanting;Submerged plant planting mode is that gemma broadcasts sowing and seedling skewer It inserts.
Further, the building mode of the ecological floating island is:Circular frame is surrounded using PE pipes or pvc pipe, with one layer Polythene net covers;Fluitante is placed above in polythene net;The elastic filler of 1 ~ 1.5m long of polythene net underhung, is used for Hang biomembrane;The fluitante selects copper coin grass, water standing grain, green watermifoil and the yellow flag of 30 ~ 50cm.Ecological floating island is fabricated to Circle is to reduce resistance to water-flow, and size is fabricated to diameter of phi 7-10m, and the interval water surface is laid, and the density of laying will make its coverage Reach the 30%-50% of water surface area, considers that aesthstic element is arranged to certain shape, such as star or diamond shape;PE or pvc pipe diameter Φ80;Polythene net mesh is 3cm;Using 3 moso bamboo stakes, by triangular shaped fixed ecological floating island, moso bamboo stake bottom end is secured It is inserted into river bottom mud, the above length of bed mud is higher than river peak level, is allowed to expose the surface.
Tea place concentration zones rainwash nitrogen and phosphorus content is high, and it is high to enter river, lake or reservoir ratio;Rainy season run-off is big, flows Fast fast, fertilizer conservation, water holding capacity are poor;Rain drop erosion is serious, and silt and phosphorus pollution are lost in seriously.The system of the present invention can make full use of The existing feature in development zone and the self-purification capacity of plant, adaptation to local conditions are concentrated in tea place, realize pollutant fluxes pair graceful with landscape Weight target;And system structure is simple, and it is easy to implement, significant effect is cut down, maintenance cost is low.
Description of the drawings
Fig. 1 is the treatment process figure of the present invention.
Fig. 2 is denitrification ditch schematic top plan view.
Fig. 3 a, b are denitrification ditch diagrammatic cross-sections.
Fig. 4 is ecological purification pool structural schematic diagram.
Fig. 5 is ecological floating island structural schematic diagram.
In figure:1 is denitrification ditch;2 be the ecological purification pool;3 be wall;4 be free water layer;5 be outlet canal;6 be haydite; 7 be corncob, sawdust, rice husk;8 be nylon wire;9 be covering with new soil;10 be ecological revetment;11 be emergent aquactic plant;12 be heavy water Plant;13 be ecological floating island;14 be fluitante;15 be fixed moso bamboo stake;16 be PE or pvc pipe;17 be polythene net;18 are Elastic filler;19 be bed mud.
Specific implementation mode
Explanation and specific implementation mode are further elaborated technical scheme of the present invention below in conjunction with the accompanying drawings.
Embodiment 1
Concentrate development zone runoff treatment system, including denilrification system and ecological purification system in tea place as shown in Figs. 1-5; The denilrification system includes denitrification ditch 1, and the denitrification ditch 1 is rectangle ditch, is surround and is formed by four sides wall 3;Denitrification Ditch 1 is built in tea hill hillside slope foot according to terrain;1 side wall of denitrification ditch is close to the ecological purification pool 2, other side wall Close to tea hill.
In the wall, inlet end wall and close tea hill side wall are Nylon ring ligaton;Close to the ecological purification pool Side wall and outlet canal wall be concrete it is brick;Thickness of wall body is 25-30cm.
It is equipped with packing layer and outlet canal 5 in denitrification ditch, packing layer is three-decker, depth 1.0-1.2m, and bottom is filled out Material is haydite 6, and depth of cracking closure 10-15cm, middle filler is corncob, sawdust, rice husk 7, wherein adulterating a small amount of haydite, corn Core, sawdust, rice husk 7 and haydite filling proportion are 5:1, depth of cracking closure 80-100cm, upper layer are nylon wire 8 and a small amount of covering with new soil 9, nylon wire 8 is laid on middle filler, depth 5-10cm, and covering with new soil 9 is on nylon wire 8, depth 5-10cm;On packing layer For free water layer 4,4 height 15-20cm of free water layer.
Between packing layer and outlet canal 5 pass through the second wall 3 separate, 3 bottom opening of the second wall so that underfilling with go out Water channel 5 is connected to;Rainwash flows into after packing layer enters outlet canal 5 through underfill layer, and outlet canal 5 is inside and outside water (flow) direction 3 upper surface of wall forms difference in height, and rainwash is made to be flowed out from outlet canal 5.Rainwash enters ecology after the outflow of outlet canal 5 Purification system.
Ecological purification system includes the ecological purification pool 2;Ecological floating island 13, ecological revetment 10 are equipped in the ecological purification pool With water purification plant 11,12;Rainwash flows into water body after the ecological purification pool 1 purifies.
The ecological revetment 10 is that the earthwork generated using structure denitrification ditch 1 builds bank slope in 2 bank band of the ecological purification pool, Slope is than 1:2-1:3, width 3-5m, depending on length is according to 2 size of the ecological purification pool.
The water purification plant 11,12 refers to the plantation emergent aquactic plant 11 within the bank slope headwater depth 0.5m of build, and very water is planted It is seedling replanting, 10-15 plants/m of planting density that object 11, which preferably selects reed, hay grass, cattail etc., planting patterns,2;Emergent aquactic plant outer The phytal zone 0.5-2.0m depth of waters plant submerged plant 12, and submerged plant 12 preferably selects water caltrop, eel grass, black algae, water buttercup etc., plant Mode with gemma broadcast sowing with seedling cuttage based on, cover degree 50-60%.
The ecological floating island 13 is by fluitante 14, elastic filler 18, PE or pvc pipe 16, polythene net 17 and moso bamboo stake 15 compositions, ecological floating island 13 are preferably fabricated to circle to reduce resistance to water-flow, and size is preferably fabricated to diameter of phi 7-10m, is spaced the water surface It lays, the density of laying will make its coverage reach the 30%-50% of water surface area, consider that aesthstic element is arranged to certain shape Shape, such as star or diamond shape;Fluitante 14 preferably selects the copper coin grass of 30 ~ 50cm, water standing grain, green watermifoil and yellow flag;Elasticity is filled out 18 long 1-1.5m are expected, for hanging biomembrane;16 diameter of phi 80 of PE or pvc pipe, for making circular frame;17 mesh of polythene net It for 3cm, is covered on circular frame, fluitante 14 is placed above in polythene net 17, fills up, and is used for hanging elastic filler below 18;Using 3 moso bamboo stakes 15, by triangular shaped fixed ecological floating island 13, river bottom mud 19 is securely inserted into 15 bottom ends of moso bamboo stake In, 19 or more length of bed mud is higher than river peak level, is allowed to expose the surface.
Think garden in Changzhou Liyang ten and runoff treatment is carried out using above system, denitrification ditch grows 500 meters, 2 meters wide, height 1.5 meters, wall is that concrete is brick, thickness 25cm, and filler is corncob, and depth 1m, upper layer covers soil moved in improve the original 10cm, inlet end It builds collecting-tank from the diversion of denitrification ditch one end to enter, is discharged and is discharged for pipeline, by the field monitoring up to a year and a half, as a result sent out Total nitrogen is reduced to 1.80mg/L by 5.10 mg/L in the case of now stable, and removal effect reaches 60% or more, total phosphorus by 0.90mg/L is reduced to 0.4mg/L, removal effect to reach 50% or more, shows that the present invention has intercepting efficiency height, operation stability Strong feature.

Claims (10)

1. development zone runoff treatment system is concentrated in a kind of tea place, which is characterized in that including denilrification system and ecological purification System;
The denilrification system includes denitrification ditch, and the denitrification ditch is rectangle ditch, is surround and is formed by four sides wall;
It is equipped with packing layer and outlet canal in denitrification ditch, is separated by the second wall between packing layer and outlet canal;Outlet canal is along water The external and internal wall upper surface for flowing direction forms difference in height, and rainwash is made to be flowed out from outlet canal;
Described filler layer is three-decker, and underfilling is haydite;Middle filler is corncob, sawdust and rice husk, and adulterates pottery Grain;Upper layer is nylon wire and covering with new soil;The second wall bottom opening so that underfilling is connected to outlet canal;Earth's surface Runoff flows into after packing layer enters outlet canal through underfill layer, enters ecological purification system after outlet canal outflow;
The ecological purification system includes the ecological purification pool;Ecological floating island, ecological revetment and net are equipped in the ecological purification pool Water plant;Rainwash flows into water body after the ecological purification pool purifies.
2. system according to claim 1, which is characterized in that the denitrification ditch is in tea hill hillside slope foot foundation landform Gesture is built;Denitrification ditch side wall is close to the ecological purification pool, and other side wall is close to tea hill.
3. system according to claim 1, which is characterized in that in the wall, inlet end wall and close tea hill one Side wall body is Nylon ring ligaton;Side wall and outlet canal wall close to the ecological purification pool are that concrete is brick;Thickness of wall body For 25-30cm.
4. system according to claim 1, which is characterized in that described filler layer depth is 1.0-1.2m;Underfilling is Haydite, depth of cracking closure 10-15cm;Middle filler is corncob, sawdust, rice husk, wherein adulterate a small amount of haydite, corncob, sawdust, Rice husk is 5 with haydite filling proportion:1, middle filler depth of cracking closure 80-100cm, upper layer are nylon wire and covering with new soil, nylon Net laying is located on middle filler, depth 5-10cm, and covering with new soil is on nylon wire, depth 5-10cm.
5. system according to claim 1, which is characterized in that be free water layer, Free water layer height in described filler layer For 15-20cm.
6. system according to claim 1, which is characterized in that the ecological revetment is to be generated using structure denitrification ditch The earthwork is built bank slope in ecological purification pool bank band and is formed, and slope is than 1:2-1:3, width 3-5m.
7. system according to claim 1 or 6, which is characterized in that the water purification plant includes being planted in enduring on shore protection The submerged plant planted at water plant and the emergent aquactic plant outer phytal zone 0.5-2.0m depth of waters;The emergent aquactic plant be selected from reed, Hay grass, cattail, 10-15 plants/m of planting density2;Submerged plant is selected from water caltrop, eel grass, black algae, water buttercup, cover degree 50-60%.
8. system according to claim 7, which is characterized in that the emergent aquactic plant planting patterns is seedling replanting;Heavy water Planting mode is that gemma broadcasts sowing and seedling cuttage.
9. system according to claim 1, which is characterized in that the building mode of the ecological floating island is:Using PE pipe or Pvc pipe surrounds circular frame, is covered with layer of polyethylene net;Fluitante is placed above in polythene net;It is outstanding below polythene net The elastic filler for hanging 1 ~ 1.5m long, for hanging biomembrane;The copper coin grass of 30 ~ 50cm of the fluitante selection, water standing grain, green fox-brush Algae and yellow flag.
10. the system according to claim 1 or 9, which is characterized in that the layout density of the ecological floating island reaches for coverage To the 30%-50% of water surface area.
CN201810343141.1A 2018-04-17 2018-04-17 A kind of tea place concentration development zone runoff treatment system Pending CN108298702A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108867810A (en) * 2018-08-07 2018-11-23 中国科学院南京地理与湖泊研究所 A kind of tea place hillside fields pollution of area source control system
CN109819833A (en) * 2019-03-07 2019-05-31 中南林业科技大学 A kind of method of seedling percent under raising Phoebe bournei Forest
CN110156167A (en) * 2019-06-26 2019-08-23 农业农村部环境保护科研监测所 Hardening basal plane ecological canal and ecological canal system
CN114830984A (en) * 2022-04-07 2022-08-02 东莞植物园 Water system creek ex-situ conservation planting and management regulation method for begonia plants

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CN204737796U (en) * 2015-04-03 2015-11-04 江苏省环境科学研究院 Reinforce formula infitration galleries clean system
CN105731656A (en) * 2016-03-09 2016-07-06 上海交通大学 Alga-rich trench system for farmland tail water treatment and treatment method
CN208200532U (en) * 2018-04-17 2018-12-07 中国科学院南京地理与湖泊研究所 A kind of tea place concentration development zone runoff treatment system

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Publication number Priority date Publication date Assignee Title
CN102561254A (en) * 2012-01-12 2012-07-11 上海交通大学 River course ecological system for treating non-point source low-pollution water
CN204737796U (en) * 2015-04-03 2015-11-04 江苏省环境科学研究院 Reinforce formula infitration galleries clean system
CN105002869A (en) * 2015-07-08 2015-10-28 江苏田娘农业科技有限公司 Method of reducing farmland nitrogen and phosphorus emissions
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108867810A (en) * 2018-08-07 2018-11-23 中国科学院南京地理与湖泊研究所 A kind of tea place hillside fields pollution of area source control system
CN108867810B (en) * 2018-08-07 2023-11-07 中国科学院南京地理与湖泊研究所 Tea garden slope ground source pollution control system
CN109819833A (en) * 2019-03-07 2019-05-31 中南林业科技大学 A kind of method of seedling percent under raising Phoebe bournei Forest
CN110156167A (en) * 2019-06-26 2019-08-23 农业农村部环境保护科研监测所 Hardening basal plane ecological canal and ecological canal system
CN114830984A (en) * 2022-04-07 2022-08-02 东莞植物园 Water system creek ex-situ conservation planting and management regulation method for begonia plants
CN114830984B (en) * 2022-04-07 2024-04-12 东莞植物园 Method for cultivating begonia plants in water system brook land and managing and regulating

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