CN108353700A - Scientific and technological greenhouse for agricultural - Google Patents
Scientific and technological greenhouse for agricultural Download PDFInfo
- Publication number
- CN108353700A CN108353700A CN201810282846.7A CN201810282846A CN108353700A CN 108353700 A CN108353700 A CN 108353700A CN 201810282846 A CN201810282846 A CN 201810282846A CN 108353700 A CN108353700 A CN 108353700A
- Authority
- CN
- China
- Prior art keywords
- frame
- ceiling
- left frame
- right frame
- wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- 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
- A01C—PLANTING; SOWING; FERTILISING
- A01C23/00—Distributing devices specially adapted for liquid manure or other fertilising liquid, including ammonia, e.g. transport tanks or sprinkling wagons
- A01C23/04—Distributing under pressure; Distributing mud; Adaptation of watering systems for fertilising-liquids
- A01C23/042—Adding fertiliser to watering systems
-
- 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
- A01G7/00—Botany in general
- A01G7/04—Electric or magnetic or acoustic treatment of plants for promoting growth
- A01G7/045—Electric or magnetic or acoustic treatment of plants for promoting growth with electric lighting
-
- 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
- A01G9/246—Air-conditioning systems
-
- 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
- A01G9/247—Watering arrangements
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B3/00—Methods or installations for obtaining or collecting drinking water or tap water
- E03B3/02—Methods or installations for obtaining or collecting drinking water or tap water from rain-water
-
- 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
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/108—Rainwater harvesting
-
- 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
Abstract
The invention discloses a kind of scientific and technological greenhouses for agricultural, including left frame, right frame and ceiling, the left end of the left frame is equipped with holder and chemical fertilizer case, and holder is located at the top of chemical fertilizer case, and header tank is placed on the holder, the top on the right side of the left frame offers blasthole, and it is fixed with ceiling on the right side of left frame, the ceiling is located at the underface of blasthole, and the other end at the ceiling end is connect with the top on the left of right frame, and solid wheel carrier is connected in the middle part of the ceiling bottom end.The present invention fits in the bottom end of left frame and right frame inner wall by the outer wall of heating plate, and heating plate is connected to by appendix with air-heater, to play the effect for being kept the temperature, being heated up to the surrounding at the plantation of ground, avoid heat losses, it is planted conducive to the vegetables in greenhouse, it is more practical, it is suitble to be widely popularized and uses.
Description
Technical field
The present invention relates to a kind of greenhouse, more particularly to a kind of agricultural science and technology greenhouse.
Background technology
Currently, with the continuous growth of population, people are more and more to the needs of vegetables, and most vegetables are by seasonal temperature
Influence, thus people start to use greenhouse gardening vegetables, there is many defects in the design of traditional greenhouse, needed inside greenhouse
Temperature is played certain warming, at the ground of vegetable cultivation, temperature is relatively low, lead to heat insulation effect not and be it is fine, it is unfavorable
In the growth of vegetables, more and more universal with the plantation of greenhouse, the science and technology of greenhouse itself is relatively low, for the ease of to vegetable in greenhouse
Dish is preferably planted.Therefore, it is proposed that a kind of agricultural science and technology greenhouse.
Invention content
The main purpose of the present invention is to provide a kind of agricultural science and technology greenhouses, and left frame is fitted in by the outer wall of heating plate
With the bottom end of right frame inner wall, and heating plate is connected to by appendix with air-heater, to play to the surrounding at the plantation of ground into
The effect of row heat preservation, heating, avoids heat losses, is planted conducive to the vegetables in greenhouse, can effectively solve background technology
The problems in.
To achieve the above object, the technical solution that the present invention takes is:
A kind of agricultural science and technology greenhouse, including left frame, right frame and ceiling, the left end of the left frame are equipped with holder and chemical fertilizer
Case, and holder is located at the top of chemical fertilizer case, is placed with header tank on the holder, the top on the right side of the left frame offer into
Water hole, and ceiling is fixed on the right side of left frame, the ceiling are located at the underface of blasthole, the other end at the ceiling end with
Top on the left of right frame connects, and solid wheel carrier is connected in the middle part of the ceiling bottom end, fixed pulley is equipped in the solid wheel carrier,
The top of the right frame is connected with supporting rod, and solar panel is equipped with above supporting rod, the right frame outer wall
Film perforation is offered, wind turbine is installed in the film perforation, the inside of the right frame is equipped with air-heater, one end of the air-heater
The other end of connecting gas transmission pipe, the appendix is connected to heating plate, and the outer wall of the heating plate fits in left frame and You Peng
The bottom end of frame inner wall, the inner wall of the heating plate offer venthole, and venthole offer it is multigroup, on the right side of the left frame
Bottom end is connected with irrigation pipe, and the top of the irrigation pipe is equipped with Water outlet, and Water outlet be equipped with it is multigroup, on the irrigation pipe
It is equipped with plantation mud, offers sliding slot in the middle part of the inner wall of the left frame and right frame, the sliding slot is built-in with sliding block, described
Supporting rod is fixed on sliding block, the bottom end of the supporting rod is equipped with incandescent lamp.
Further, the top inside the film perforation is equipped with shaft, and sheet rubber is connected in shaft.
Further, the bottom end on the right side of the right frame is connected with electric appliance box, and the bottom end inside the electric appliance box is equipped with
Accumulator and photovoltaic converter, and accumulator is located at the left side of photovoltaic converter.
Further, the energy input end of the energy output end of the solar panel and photovoltaic converter connects, and
The energy output end of photovoltaic converter and the energy input end of accumulator connect.
Further, the top inside the right frame is equipped with hoist engine, and the hoist engine is built-in with rope, described
Rope is connected through the left side of right frame, the rope by the top of fixed pulley and supporting rod.
Further, the top of the header tank is connected with collection tube, and the other end of collection tube is through left frame
The other end of inside, the collection tube is connected to blasthole.
Further, the right end of the header tank is equipped with dynamoelectric water valve, and woven hose, institute are connected on the dynamoelectric water valve
The other end for stating woven hose is connected to the left end of irrigation pipe.
Further, the top of the chemical fertilizer case is equipped with water pump, and feeding mouth is offered on the left of the chemical fertilizer case, described
Feeding pipe is connected on water pump, the other end of the feeding pipe is connected to the left end of irrigation pipe.
Further, the bottom end on the left of the left frame is connected with water pipe, and one end of the water pipe is through left frame
Inside, one end of the water pipe are connected to the left end of irrigation pipe.
Compared with prior art, the present invention has the advantages that:
1. the agricultural science and technology greenhouse of the present invention, the bottom end of left frame and right frame inner wall is fitted in by the outer wall of heating plate, and
Heating plate is connected to by appendix with air-heater, to play the effect for being kept the temperature, being heated up to the surrounding at the plantation of ground, is avoided
Heat losses are planted conducive to the vegetables in greenhouse.
2. the agricultural science and technology greenhouse of the present invention, by being placed with header tank on holder, and header tank by collection tube and enters water
Hole is connected to, and rainwater will be collected by the rainy day by blasthole, and is used for irrigating, and the utilization of water resource is saved.
3. the agricultural science and technology greenhouse of the present invention, is built-in with sliding block, and be connected with supporting rod on sliding block, the branch by sliding slot
The bottom end of strut is equipped with incandescent lamp, is connected by the top of fixed pulley and supporting rod by the rope in hoist engine, so as to
It drives supporting rod to be moved up and down positioned at sliding slot, plays the height for changing incandescent lamp light filling, to be conducive to different formative years
Demand of the vegetables to illumination.
4. the agricultural science and technology greenhouse of the present invention, irrigation pipe, and the top of irrigation pipe are connected with by the bottom end on the right side of left frame
End is equipped with multigroup Water outlet, while Water outlet is covered by plantation mud, when being irrigated, can be carried out to the inside for planting mud
It irrigates, saves time and the labour of traditional artificial pouring, also play uniform pouring effect.
5. the agricultural science and technology greenhouse of the present invention is equipped with water pump by being equipped with chemical fertilizer case on left frame on chemical fertilizer case, can
It reconciles in chemical fertilizer case after liquid fertilizer, is delivered to chemical fertilizer in irrigation pipe by feeding pipe by water pump, and have Water outlet that will change
Fertilizer is emitted into plantation mud, is absorbed conducive to vegetables, the growth result reached.
6. the agricultural science and technology greenhouse of the present invention, by opening up film perforation on right frame, and is equipped with wind turbine, in greenhouse in film perforation
After using season, after needing to carrying out Integral cleaning in greenhouse, starts wind turbine and outside air is blown into greenhouse, be conducive to interior
The circulation of portion's air is practically applicable to existing greenhouse gardening and uses.
Description of the drawings
Fig. 1 is the overall structure diagram of agricultural science and technology greenhouse of the present invention;
Fig. 2 is the heating plate structure schematic diagram of agricultural science and technology greenhouse of the present invention;
Fig. 3 is the film perforation structural schematic diagram of agricultural science and technology greenhouse of the present invention;
Fig. 4 is the supporting bar structure schematic diagram of agricultural science and technology greenhouse of the present invention.
In figure:1, left frame;2, right frame;3, sliding slot;4, sliding block;5, supporting rod;6, incandescent lamp;7, supporting rod;8, too
Positive energy power generation plate;9, ceiling;10, solid wheel carrier;11, fixed pulley;12, rope;13, hoist engine;14, blasthole;15, it acquires
Pipe;16, header tank;17, holder;18, dynamoelectric water valve;19, woven hose;20, chemical fertilizer case;21, feeding mouth;22, water pump;23, enter
Expects pipe;24, water pipe;25, irrigation pipe;26, Water outlet;27, heating plate;28, mud is planted;29, electric appliance box;30, photovoltaic converter;
31, accumulator;32, air-heater;33, wind turbine;34, sheet rubber;35, shaft;36, venthole;37, film perforation, 38, appendix.
Specific implementation mode
To make the technical means, the creative features, the aims and the efficiencies achieved by the present invention be easy to understand, with reference to
Specific implementation mode, the present invention is further explained.
As shown in Figs 1-4, a kind of agricultural science and technology greenhouse, including left frame 1, right frame 2 and ceiling 9, the left frame 1
Left end is equipped with holder 17 and chemical fertilizer case 20, and holder 17 is located at the top of chemical fertilizer case 20, is placed with and catchments on the holder 17
The top of case 16,1 right side of the left frame offers blasthole 14, and the right side of left frame 1 is fixed with ceiling 9, the ceiling 9
Positioned at the underface of blasthole 14, the other end at 9 end of the ceiling is connect with the top in 2 left side of right frame, 9 bottom end of the ceiling
Middle part be connected with solid wheel carrier 10, fixed pulley 11 is installed in the solid wheel carrier 10, the top of the right frame 2 is connected with support
Bar 7, and the top of supporting rod 7 is equipped with solar panel 8,2 outer wall of right frame offers film perforation 37, the film perforation 37
Wind turbine 33 is inside installed, the inside of the right frame 2 is equipped with air-heater 32, one end connecting gas transmission pipe of the air-heater 32
38, the other end of the appendix 38 is connected to heating plate 27, and the outer wall of the heating plate 27 fits in left frame 1 and right frame
The inner wall of the bottom end of 2 inner walls, the heating plate 27 offers venthole 36, and venthole 36 offers multigroup, the left frame 1
The bottom end on right side is connected with irrigation pipe 25, and the top of the irrigation pipe 25 is equipped with Water outlet 26, and Water outlet 26 be equipped with it is more
Group, is equipped with plantation mud 28 on the irrigation pipe 25, and sliding slot 3 is offered in the middle part of the inner wall of the left frame 1 and right frame 2,
The sliding slot 3 is built-in with sliding block 4, and supporting rod 7 is fixed on the sliding block 4, and the bottom end of the supporting rod 7 is equipped with incandescent lamp 6.
Wherein, the top inside the film perforation 37 is equipped with shaft 35, and sheet rubber 34 is connected in shaft 35.
Wherein, the bottom end on 2 right side of the right frame is connected with electric appliance box 29, and the bottom end inside the electric appliance box 29 is equipped with
Accumulator 31 and photovoltaic converter 30, and accumulator 31 is located at the left side of photovoltaic converter 30.
Wherein, the energy output end of the solar panel 8 is connect with the energy input end of photovoltaic converter 30, and light
The energy output end of volt converter 30 is connect with the energy input end of accumulator 31.
Wherein, the top inside the right frame 2 is equipped with hoist engine 13, and the hoist engine 13 is built-in with rope 12,
The rope 12 is connect by fixed pulley 11 with the top of supporting rod 7 through the left side of right frame 2, the rope 12.
Wherein, the top of the header tank 16 is connected with collection tube 15, and the other end of collection tube 15 is through left frame 1
Inside, the other end of the collection tube 15 is connected to blasthole 14.
Wherein, the right end of the header tank 16 is equipped with dynamoelectric water valve 18, and woven hose is connected on the dynamoelectric water valve 18
19, the other end of the woven hose 19 is connected to the left end of irrigation pipe 25.
Wherein, the top of the chemical fertilizer case 20 is equipped with water pump 22, and the left side of the chemical fertilizer case 20 offers feeding mouth 21,
Feeding pipe 23 is connected on the water pump 22, the other end of the feeding pipe 23 is connected to the left end of irrigation pipe 25.
Wherein, the bottom end in the left side of the left frame 1 is connected with water pipe 24, and one end of the water pipe 24 is through left frame 1
Inside, one end of the water pipe 24 is connected to the left end of irrigation pipe 25.
Operation principle:When work, 28 planting vegetables in planting mud start hoist engine 13, so that hoist engine 13 is driven and draw orange red
Rope 12 is wound or is unclasped, and is moved up and down to be located in sliding slot 3 to the sliding block 4 at 7 both ends of supporting rod, is made supporting rod
The incandescent lamp 6 of 7 bottom ends installation carries out the adjusting of height, needs voluntarily adjust to use conducive to vegetable growth, in needs pair
When 28 surface of plantation mud is kept the temperature or heated up, air-heater 32 can be started, keep the hot gas that air-heater 32 generates defeated by appendix 38
It send into heating plate 27, and hot gas is discharged the venthole 26 for having 27 inner wall of heating plate to open up, is played from the surface of plantation mud 28
The effect of heat preservation and heating, by opening dynamoelectric water valve 18, makes header tank when needing to irrigate the vegetables on plantation mud 28
Water in 16 is entered by woven hose 19 in the Water outlet 26 installed on irrigation pipe 25, to being irrigated inside plantation mud 28, simultaneously
Also water pipe 24 can be connect with water tap, start water tap discharge water, by the Water outlet 26 on irrigation pipe 25 into
Row water outlet is irrigated, and when needing to pour chemical fertilizer, liquid fertilizer can be poured into chemical fertilizer case 20 by feeding mouth 21, needed in use, opening
Chemical fertilizer in chemical fertilizer case 20 is pumped by feeding pipe 23 in the Water outlet 26 installed on irrigation pipe 25 by dynamic water pump 22 by water pump 22,
And internal broadcast application is carried out to plantation mud 28, it is conducive to the absorption of vegetables, while the electric power that the electrical appliance in greenhouse uses will derive from
The electric power that solar panel 8 generates, saves the use of electric power, when needing to carry out cleaning ventilation to greenhouse, can start wind turbine
33, so that the wind-force that wind turbine 33 generates is passed through film perforation 37 and be blown into greenhouse, and the sheet rubber 34 that shaft 35 connects is blown afloat, is conducive to big
Ventilation effect in canopy plants vegetables in greenhouse and plays preferable growth.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (1)
1. a kind of scientific and technological greenhouse for agricultural, including left frame(1), right frame(2)And ceiling(9), it is characterised in that:It is described
Left frame(1)Left end holder is installed(17)With chemical fertilizer case(20), and holder(17)Positioned at chemical fertilizer case(20)Top, it is described
Holder(17)On be placed with header tank(16), the left frame(1)The top on right side offers blasthole(14), and left frame
(1)Right side be fixed with ceiling(9), the ceiling(9)Positioned at blasthole(14)Underface, the ceiling(9)That holds is another
End and right frame(2)The top in left side connects, the ceiling(9)Solid wheel carrier is connected in the middle part of bottom end(10), the solid wheel carrier
(10)Fixed pulley is inside installed(11), the right frame(2)Top be connected with supporting rod(7), and supporting rod(7)Top peace
Equipped with solar panel(8), the right frame(2)Outer wall offers film perforation(37), the film perforation(37)Wind turbine is inside installed
(33), the right frame(2)Inside air-heater is installed(32), the air-heater(32)One end connecting gas transmission pipe(38),
The appendix(38)The other end and heating plate(27)Connection, the heating plate(27)Outer wall fit in left frame(1)With
Right frame(2)The bottom end of inner wall, the heating plate(27)Inner wall offer venthole(36), and venthole(36)It offers more
Group, the left frame(1)The bottom end on right side is connected with irrigation pipe(25), the irrigation pipe(25)Top Water outlet is installed
(26), and Water outlet(26)Multigroup, the irrigation pipe is installed(25)On be equipped with plantation mud(28), the left frame(1)With
Right frame(2)Inner wall in the middle part of offer sliding slot(3), the sliding slot(3)It is built-in with sliding block(4), the sliding block(4)Upper fixation
There is supporting rod(7), the supporting rod(7)Bottom end incandescent lamp is installed(6);
The film perforation(37)Internal top is equipped with shaft(35), and shaft(35)On be connected with sheet rubber(34).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201810282846.7A CN108353700A (en) | 2018-04-02 | 2018-04-02 | Scientific and technological greenhouse for agricultural |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201810282846.7A CN108353700A (en) | 2018-04-02 | 2018-04-02 | Scientific and technological greenhouse for agricultural |
Publications (1)
Publication Number | Publication Date |
---|---|
CN108353700A true CN108353700A (en) | 2018-08-03 |
Family
ID=63001934
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201810282846.7A Withdrawn CN108353700A (en) | 2018-04-02 | 2018-04-02 | Scientific and technological greenhouse for agricultural |
Country Status (1)
Country | Link |
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CN (1) | CN108353700A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109121878A (en) * | 2018-08-31 | 2019-01-04 | 合肥桴槎山软籽石榴研发有限公司 | A kind of agricultural plantation solarium |
CN109452030A (en) * | 2018-11-30 | 2019-03-12 | 珠海美光原科技股份有限公司 | A kind of light compensating lamp and light-supplementing system |
CN112021048A (en) * | 2020-10-10 | 2020-12-04 | 王毅 | Watering equipment of convenient clearance for vegetable cultivation equipment |
CN112492992A (en) * | 2020-11-28 | 2021-03-16 | 安徽省农业科学院农业工程研究所 | High-survival-rate cutting seedling method for apocarya |
CN113057049A (en) * | 2021-03-16 | 2021-07-02 | 安徽农业大学 | Agricultural intelligent platform based on Internet of things |
-
2018
- 2018-04-02 CN CN201810282846.7A patent/CN108353700A/en not_active Withdrawn
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109121878A (en) * | 2018-08-31 | 2019-01-04 | 合肥桴槎山软籽石榴研发有限公司 | A kind of agricultural plantation solarium |
CN109452030A (en) * | 2018-11-30 | 2019-03-12 | 珠海美光原科技股份有限公司 | A kind of light compensating lamp and light-supplementing system |
CN112021048A (en) * | 2020-10-10 | 2020-12-04 | 王毅 | Watering equipment of convenient clearance for vegetable cultivation equipment |
CN112492992A (en) * | 2020-11-28 | 2021-03-16 | 安徽省农业科学院农业工程研究所 | High-survival-rate cutting seedling method for apocarya |
CN113057049A (en) * | 2021-03-16 | 2021-07-02 | 安徽农业大学 | Agricultural intelligent platform based on Internet of things |
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Application publication date: 20180803 |
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