CN103444466B - Double-heat-source semi-automatic cultivation facilitating system for large cherries - Google Patents
Double-heat-source semi-automatic cultivation facilitating system for large cherries Download PDFInfo
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- CN103444466B CN103444466B CN201310433008.2A CN201310433008A CN103444466B CN 103444466 B CN103444466 B CN 103444466B CN 201310433008 A CN201310433008 A CN 201310433008A CN 103444466 B CN103444466 B CN 103444466B
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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 belongs to the technical field of off-season cultivation for large cherries, and relates to a double-heat-source semi-automatic cultivation facilitating system for large cherries. The system comprises a ridge-shaped plastic house, a double-heat-source heating unit and an axial flow fan. Compared with the traditional plastic houses and greenhouses for cultivating the large cherries, the double-heat-source semi-automatic cultivation facilitating system has the advantages that a ground heatable brick bed type supplementary heating mode is adopted, the dimensions (including the roof height of 7.5m and a slope factor of 3/10) of a house body are reasonably set, the cultivation environment control volume is increased, internal environmental factors of the house are jointly controlled in a semi-automatic manner, and the temperature of the house is adjusted in a balanced manner, so that a cultivation environment is stable relatively, the quality of the appearance of the fruits is generally improved, the sizes of the fruits are uniform, colors of the large cherries are bright, fruit cracking and freezing injury are prevented, the average yield per mu is higher than 600kg, the average excellent cherry rate is higher than 90%, shortcomings of unstable quality and yield of cherries cultivated in the traditional cultivation plastic houses and greenhouses are overcome, and the economical benefit of the double-heat-source semi-automatic cultivation facilitating system is increased by nearly 10 times as compared with an open-field cultivation mode.
Description
Technical field
The present invention relates to a kind of pair of semi-automatic forcing culture system of thermal source large cherry, belong to large cherry anti-season culture technology field.
Background technology
Large cherry (also claiming sweet cherry) is that fruit tree species is introduced in Europe, and nineteen ninety-five Hou China is fast-developing, because its outward appearance is beautiful, nutritious, fragrant and sweet good to eat, ripe early than other fruit, so economic benefit is high especially in year.Since 2007, contained the large cherry of fruit tree outdoor cropping in age, every 666.7 m
2average year net income is higher than 1.15 ten thousand yuan; And adopt suitable facility to carry out forcing culture, can make year net income increase, after 2000, domestic large cherry facility cultivation area increases sharply, there is diversified large cherry cultivation booth and greenhouse in various places, these facilities are mostly that local orchard worker builds according to the condition of oneself and experience, development to large cherry forcing culture technology, has played important impetus.But many problems, have also appearred in the limitation due to conditions such as professional technique, economy, region, experiences, particularly Qiaoization large cherry is cultivated booth, and because canopy body is higher, initial cost and operational administrative difficulty are large, and the problem running into is also more outstanding.Be mainly manifested in four aspects, the one, by manual record large cherry tree natural dormancy chilling requirement, human error is larger completely, causes detaining the canopy heating-up time inaccurate (chilling requirement is not enough affects fruit quality and output, and button canopy affects economic benefit too late).The 2nd, envirment factor detects and generally adopts traditional mercury, kerosene post and mechanical induction type instrumentation, this class instrument is cheap, but reaction velocity is slow, function singleness, in use procedure, need frequent turnover booth monitoring related data, labour intensity and manual operation error are very large, particularly at night or sleety weather, are difficult to envirment factor in control canopy promptly and accurately.The 3rd, canopy body structure is unreasonable, shoulder height and rise between slope science not, a little less than making canopy body wind resistance snow ability, there is potential safety hazard.The 4th, be only to utilize solar energy single source to heat, when meeting with continuously sombre weather or special low temperature, canopy temperature exceeds lower limit claimed range, causes output and quality degradation.Therefore, heater must be set in canopy body to guarantee canopy temperature; Such as heating furnace, heating installation, air-conditioning etc.In production practices, find, adopt existing heater when heating in canopy body, cost is high, local heating, lowers the temperature too fastly, and in canopy body, the unbalanced monitored results that causes of temperature is inaccurate, finally causes fruit yield and quality to reduce.
Summary of the invention
For addressing the above problem, the present invention has developed a kind of pair of semi-automatic forcing culture system of thermal source large cherry.This cultivation system adopts specially for the booth of large cherry forcing culture design and heater and the regulation device adapting with this booth; Thereby make large cherry cultivation process in stable, balanced preference temperature environment.
The technical solution used in the present invention is as follows:
Pair semi-automatic forcing culture system of thermal source large cherry, comprises ridge-shaped booth, two thermal source heat unit, axial flow blower;
The canopy body of described booth adopts steelframe structure knot, along North and South direction, builds up; Its length, width, shoulder height, rise and be respectively 100m, 20 m, 4.5 m, 7.5 m;
Peng Ti spine both sides, apart from the 60cm of spine place, being provided with top ventilation seam, is that 60cm place is provided with bottom ventilation and stitches on two sides of canopy body thing, apart from ground vertical range; Bottom ventilation seam and top ventilation seam are south-north direction, and its openings of sizes is adjustable;
The center of canopy body width, apart from 3.7m place, ground, fill an axial flow blower along every 25 meter amperes of North and South direction;
The described pair of thermal source unit of heating comprises and is positioned at the middle part of canopy body width, the ground a heatable brick bed formula heating furnace arranging along North and South direction, its positive identity distance canopy body north side face 4.5 m;
Heating furnace comprises a heatable brick bed body, the flue be connected with a heatable brick bed body with one end, the other end extending to canopy body southern side face; The latter half of a heatable brick bed body burner hearth locates below ground level, more than the south of flue is positioned at ground completely; A heatable brick bed body is 10 m along south, north to length, a heatable brick bed body inner thorax diameter 0.4 m, flue Inner thorax diameter 0.21 m;
In flue, apart from an axial flow blower of canopy body southern side face 8 m places installations;
To the north of heating furnace front, be operation pond, to the north of operation pond, south is to being long, and its length size is respectively 2 m, 1.8 m, 0.65 m.
Two thermals source that the above-mentioned pair of thermal source heated in unit refer to the heat energy that solar energy and ground a heatable brick bed formula heating furnace provide.This pair of semi-automatic forcing culture system of thermal source large cherry is applicable to the area that latitude is 34.52～39.52, longitude is 117.33～119.24.
The above-mentioned pair of semi-automatic forcing culture system of thermal source large cherry, the booth of the ad hoc structure size that adopts, the ground a heatable brick bed formula heating furnace adapting with this booth and the axial flow blower that is arranged on ad-hoc location, though cooperatively interact, acting in conjunction so that the canopy vivo environment factor under the condition of extraneous natural environment generation acute variation still in stable state; Thereby the economic benefit of the large cherry in canopy body is significantly improved.Specifically: the first, booth of the present invention is south-north direction, its object is to reduce the temperature difference in canopy body on daytime.Result of the test shows, the morning, position of sun was by north, and afternoon is by north; Winter is when fine, and in one day, in east-west booth of the strongest period of illumination, the following region near south of 3.5m and maximum near the space temperature variation amplitude on the north, 5.7 ℃ of left and right.And in the south-north direction booth of the same terms, 3.5m is following near region in the east and maximum near the space temperature variation amplitude in west, 3.1 ℃ of left and right.The second, be rationally provided with canopy body size (rising 7.5m, 3/10 slope), keeping, under the prerequisite of the outside destroy such as stronger wind resistance snow, having improved the control volume of planting environment in canopy body; Thereby when external environment generation acute variation, the environment in canopy body possesses stronger buffering, resistant function, to keep the stable environment in canopy body.The 3rd, ground of the present invention a heatable brick bed formula heating furnace: its body of heater and chimney run through booth north and south, have increased heating surface (area) (HS; The latter half of its burner hearth locates below ground level, the small part of chimney locates below ground level, so its heat transfer medium comprises air and the soil of two kinds of different heat transfer coefficients; Its front is apart from canopy body southern side face 4.5m, under the prerequisite that guarantees heating comprehensively, save the consumption of chimney.In addition, position, the size of this ground a heatable brick bed formula heating furnace are to adapt with the physical dimension of above-mentioned booth, and wherein the variation of any one factor all can be broken the stable environment of canopy body.The 4th, the ad-hoc location in canopy body arranges axial flow blower and ventilation seam, thereby reaches the environment regulating quickly and evenly in canopy body.
For the ease of the envirment factor in regulation and control booth, the semi-automatic forcing culture system of above-mentioned pair of thermal source large cherry of the present invention, its greenhouse surface is coated with the insulation straw screen or mat that can roll.
In order further to improve the stability of envirment factor and the economic benefits of large cherry such as canopy temperature, humidity, the semi-automatic forcing culture system of above-mentioned pair of thermal source large cherry of the present invention, also comprise that chilling requirement is selected automatically, record and display unit, and environment automatic monitoring, record and joint control alarm unit.
Chilling requirement is selected automatically, record and display unit, by the automatic monitoring and recording instrument of the disclosed large cherry dormancy of CN203149314U chilling requirement, is completed.This recorder can detect and select the required effective low temperature (0～7.2 ℃) of large cherry tree natural dormancy in winter automatically, and automatically records and accumulate demonstration effective low temperature life period (chilling requirement).Research shows, the chilling requirement of the reasonable dormancy of domestic common large cherry kind is at present all within the scope of 400～1200 hours, after as long as chilling requirement meets, large cherry tree just can shift to an earlier date breaking dormancy sprout growth under Protected Cultivation, Blooming result, ripen in advance, administrative staff can be in annual autumn and winter season, the chilling requirement showing according to recorder accumulative total, determines that the button canopy of the large cherry kind of planting heats up opportunity.
Environment automatic monitoring, record and joint control alarm unit, by the monitoring of the disclosed a kind of sweet cherry cultivation of CN102778881A green house temperature-humidity, record combined control equipment and complete.This device is arranged in the outer night shift room of canopy, by sensor and transmission cable, with line remote measurement, also automatically records temperature, humidity and the illuminance of select location in canopy; Then the data that detect and the parameter of artificial input are compared, reach setting index, output a control signal to semiautomatic control unit, by manually carrying out state, keep operation, make the best forcing culture environment of sweet cherry in hold mode.Exceed setting range, export another kind of control signal to semiautomatic control unit, sounding and lighting alarm is sent in promotion, reminds person on duty by devices such as regulation and control electric screen robling machines, continues not regulate reaching the envirment factor of setting index.
beneficial effect
Within continuous 2 years, application native system carries out large cherry forcing culture production test, attain the results expected, compare with traditional booth and greenhouse culture, adopted ground a heatable brick bed formula supplementary heating mode, rationally be provided with canopy body size and (rise 7.5m, 3/10 slope), increased the control volume of planting environment, envirment factor in canopy has been implemented to semi-automatic joint control and canopy temperature balance adjustment, make planting environment relatively stable, fruit appearance quality generally improves, size evenly, color and luster is beautiful, no-dehiscent fruit, without freeze injury, average yield per mu surpasses 600kg, average high quality fruit rate is more than 90%, traditional cultivation booth and hothouse production have been overcome, quality and output is unsettled drawback all, economic benefit improves nearly 10 times than outdoor cropping.
Accompanying drawing explanation
Fig. 1 is that canopy body forms and structural representation;
Fig. 2 is ground a heatable brick bed formula heating furnace and operation pond side schematic view;
In figure, 1-1. electric screen robling machine, 1-2. is incubated straw screen or mat, 1-3. top ventilation seam, 1-4. steel pipe crossbeam, 1-5. steel pipe support, 1-6. plastic film, 1-7. steel pipe post, 1-8. bottom ventilation seam, 1-9. ground, 1-10. heating furnace, 2-2. step, 2-3. operates pond, 2-4. a heatable brick bed body, 2-5. flue, 2-6. axial flow blower, the 2-9. cylinder of discharging fume outward, 2-10. burner hearth, 2-11. lime-ash thorax, thorax in 2-12. a heatable brick bed body, thorax in 2-13. flue.
Embodiment
Below in conjunction with the drawings and specific embodiments, describe the present invention:
As shown in Figure 1, described greenhouse body adopts steel frame construction, along North and South direction, builds up, and its length, width, shoulder height, rises size and is respectively 100m, 20 m, 4.5 m, 7.5 m, and 1/2 width is 10 m, shoulder height and rise between slope be 3/10.Steel pipe post 1-7, the several steel pipe crossbeam 1-4 that its steel frame construction is not waited by several length and steel pipe support 1-5 build and form; Centered by the longest steel pipe post 1-7, the two row steel pipe post 1-7 of each branch of thing both sides; Wherein, the top of the longest all steel pipe post 1-7 forms the Peng Ti spine of south-north direction.Covered with plastic film 1-6 on steel frame construction, the bottom of plastic film 1-6Peng body spine both sides and thing two sides respectively has two top ventilation seam 1-3 and bottom ventilation seam 1-8; Top ventilation seam 1-3 all becomes south-north direction with bottom ventilation seam 1-8; Bottom ventilation seam 1-8 is all 60cm apart from ground 1-9 vertical range, and top ventilation seam 1-3 is apart from the 60cm of spine; Manual operation regulates the size of top ventilation seam 1-3 and bottom ventilation seam 1-8 by rope and pulley.Covering and heat insulating straw screen or mat 1-2 on plastic film 1-6, insulation straw screen or mat 1-2 can scroll up Zhi Peng body spine; Peng Ti spine is also provided with for controlling the electric screen robling machine 1-1 of insulation straw screen or mat 1-2.On the large ceiling of 100 m length, 4 electric screen robling machine 1-1 are housed, every 25 m arrange one, every electric screen robling machine 1-1 all can independent operating, by person on duty's remote control or manual manipulation electric screen robling machine 1-1 rotating, by rope and pulley, change the area coverage of insulation straw screen or mat 1-2, at sombre weather and night, can control heat insulation grass curtain 1-2 and tightly cover booth.At booth, an electric screen robling machine 1-1 is respectively equipped with near the ground 1-9 of canopy body in the south and north, for regulating two sides, booth north and south to be incubated the area coverage of straw screen or mat 1-2.The center of canopy body width, apart from 3.7m place, ground, fill an axial flow blower 2-6 along every 25 meter amperes of North and South direction; The model of axial flow blower 2-6 is herein SF type 0.11KW
.every air flow rate 1000 m3 per hour during Control Shaft flow fan 2-6 operation, air supply direction horizontal 360-degree automatic cycle, circulation primary per minute, the temperature contrast that canopy internal cause position difference causes, regulated by the circulating current that axial flow blower 2-6 forced air supply forms, make the temperature of diverse location in canopy reach balance consistent.
As shown in Figure 2, a heatable brick bed formula heating furnace 1-10 heating in described ground is one of two thermals source, along south, north to building up, is arranged on the west side of canopy body width dotted line, and the positive identity distance canopy body of heating furnace 1-10 north 4.5 m, take coal or firewood as fuel.The a heatable brick bed body 2-4 of heating furnace 1-10 is 10 m along south, north to length, thorax 2-12 diameter 0.4 m, its below and burner hearth 2-10 UNICOM in horizontally disposed a heatable brick bed body; The below of burner hearth 2-10 is 2-11 lime-ash thorax; Flue Inner thorax 2-13 diameter 0.21 m, southern to being communicated with along north with thorax 2-12 in a heatable brick bed body, flue 2-5 is communicated with an outer smoke evacuation cylinder 2-9 beyond extending to canopy body the south always, and flue 2-5 the North is a little less than the south.In flue 2-5 and a heatable brick bed body, thorax 2-12 is all floating with cement mortar sealing, is beneficial to quick smoke evacuation.In flue 2-5, apart from a canopy body 8 m in the south installation 0.5kw axial flow blower 2-6 in position far away, assist smoke evacuation and combustion-supporting; Axial flow blower 2-6 herein can replace with a CZR-75 type 0.55kw combustion fan.In a heatable brick bed body, the latter half of thorax 2-12 is positioned at below the 1-9 of ground; Exposed heating furnace a heatable brick bed body 2-4 and flue 2-5 position more than the 1-9 of ground, available earth covers, to increase its anti-intensity of trampling.Operation pond 2-3 is positioned to the north of heating furnace 1-10 front, to the north of south to for long, its length size is respectively 2 m, 1.8 m, 0.65 m; The north side face of operation pond 2-3 is provided with step 2-2.
The monitoring of the disclosed a kind of sweet cherry cultivation green house temperature-humidity of the CN203149314U automatic monitoring and recording instrument of disclosed large cherry dormancy chilling requirement and CN102778881A is installed in booth, records combined control equipment.Wherein, the monitoring of sweet cherry cultivation green house temperature-humidity, record combined control equipment and detected by temperature, humidity, illuminance, record, joint control three partial circuits of reporting to the police combine, be arranged in the outer night shift room of canopy, by sensor and transmission cable, with line remote measurement, also automatically record temperature, humidity and the illuminance of select location in canopy; Before use, according to interactional rule between each envirment factor, determine the envirment factor parameter index that needs setting, by manual operation, be input to the setting parameter link of joint control system.
The automatic monitoring and recording instrument of large cherry dormancy chilling requirement automatically detects and selects the required effective low temperature (0～7.2 ℃) of large cherry tree natural dormancy in winter, and automatically records and accumulate demonstration effective low temperature life period (chilling requirement).The dormancy chilling requirement (study carefully and show, the chilling requirement of the reasonable dormancy of domestic common large cherry kind is at present all within the scope of 400～1200 hours) that reaches large cherry when chilling requirement afterwards, is detained canopy.
With the monitoring of sweet cherry cultivation green house temperature-humidity, record combined control equipment the envirment factor in booth detected, and envirment factor numerical value in the canopy detecting and setting value are compared, reach setting index, output a control signal to semiautomatic control unit, by artificial state, keep operation, make the best forcing culture environment of sweet cherry in hold mode.Exceed setting range, export another kind of control signal to semiautomatic control unit, promote to send sounding and lighting alarm, the envirment factor of reminding person on duty to set index to not reaching regulates.
In booth temperature regulation and control main by the electric screen robling machine 1-1 of manual control, the top of plastic film 1-6 and bottom ventilation seam 1-8, insulation straw screen or mat 1-2 or cotton-wadded quilt, the devices such as a heatable brick bed formula heating furnace 1-10 complete, in canopy, temperature detects, reporting to the police is completed automatically by the monitoring of sweet cherry facility cultivation envirment factor, record, the joint control control system that are arranged in the outer night shift room of canopy, temperature probe adopts the PT-100 type thermistor with waterproof case, is placed in and in canopy, has the representational position of temperature.On daytime, when the external world has sunlight and canopy temperature to need to improve, be rolled onto minimum insulation straw screen or mat 1-2 or cotton-wadded quilt, bottom ventilation seam 1-8 and top ventilation seam 1-3 turned down or sealed simultaneously.In like manner, in reducing canopy, need during temperature, reduce insulation straw screen or mat 1-2 or cotton-wadded quilt area coverage, by opening or tune up bottom ventilation seam 1-8 and top ventilation seam 1-3 lowers the temperature.When needs are incubated or regulate canopy temperature night, be also to complete by regulating and controlling above device.Ground temperature is controlled by temperature and drip irrigation water temperature and the water yield in canopy.While needing to increase ground temperature, except increasing or keeping, canopy temperature, also will reducing the drip irrigation time, the water yield that shallow soil sees through is reduced, temperature recovery, otherwise, the drip irrigation time increased, ground temperature is declined, so regulation and control, can whole winter canopy in ground temperature be dynamically controlled in claimed range 7-17 ℃.When meeting with continuously sombre weather, light ground a heatable brick bed formula heating furnace, in the time of need being rapidly heated, take and be dried firewood as fuel, according to the temperature value shown in environment automatic monitoring, record and joint control alarm unit, regulate firewood addition to control the intensity of a fire, in the time of need significantly heating up, adjust very hot oven gesture and open axial flow blower combustion-supporting, in the time of need heating up by a small margin, turn down the intensity of a fire.When needs insulations or while slowly heating up, take high-quality coal as raw material, with the unlatching of coal addition and axial flow blower or close the adjusting intensity of a fire.
Illuminance regulation and control in described booth, by manually regulating insulation straw screen or mat 1-2 masked area to complete according to illumination detected value, need in conjunction with working as time temperature Mutual Influence Law, jointly regulate and control with temperature, while needing to increase illumination, reduce masked area, otherwise increase masked area, the interior illumination of canopy on daytime in winter remains within the scope of 6-55Klux, and in canopy, temperature can correspondingly remain on 7 ℃-23 ℃.
Claims (3)
1. the two semi-automatic forcing culture systems of thermal source large cherry, is characterized in that, comprise ridge-shaped booth, two thermal source heat unit, axial flow blower;
The canopy body of described booth adopts steelframe structure knot, along North and South direction, builds up; Its length, width, shoulder height, rise and be respectively 100m, 20 m, 4.5 m, 7.5 m;
Peng Ti spine both sides, apart from the 60cm of spine place, being provided with top ventilation seam, is that 60cm place is provided with bottom ventilation and stitches on two sides of canopy body thing, apart from ground vertical range; Bottom ventilation seam and top ventilation seam are south-north direction, and its openings of sizes is adjustable;
The center of canopy body width, apart from 3.7m place, ground, fill an axial flow blower along every 25 meter amperes of North and South direction;
The described pair of thermal source unit of heating comprises and is positioned at the middle part of canopy body width, the ground a heatable brick bed formula heating furnace arranging along North and South direction, its positive identity distance canopy body north side face 4.5 m;
Heating furnace comprises a heatable brick bed body, the flue be connected with a heatable brick bed body with one end, the other end extending to canopy body southern side face; The latter half of a heatable brick bed body burner hearth locates below ground level, more than the south of flue is positioned at ground completely; A heatable brick bed body is 10 m along south, north to length, a heatable brick bed body inner thorax diameter 0.4 m, flue Inner thorax diameter 0.21 m;
In flue, apart from an axial flow blower of canopy body southern side face 8 m places installations;
To the north of heating furnace front, be operation pond, to the north of operation pond, south is to being long, and its length size is respectively 2 m, 1.8 m, 0.65 m.
2. the according to claim 1 pair of semi-automatic forcing culture system of thermal source large cherry, is characterized in that, greenhouse surface is coated with the insulation straw screen or mat that can roll.
3. the according to claim 1 and 2 pair of semi-automatic forcing culture system of thermal source large cherry, is characterized in that, also comprises that chilling requirement is selected automatically, record and display unit, and environment automatic monitoring, record and joint control alarm unit.
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| CN106105887A (en) * | 2016-08-17 | 2016-11-16 | 新疆农垦科学院 | A kind of heliogreenhouse being applicable to the cultivation of facility Fructus Pruni pseudocerasi |
| CN107125053A (en) * | 2017-05-10 | 2017-09-05 | 塔里木大学 | The method for adjusting greenhouse air humiture |
| CN110839454A (en) * | 2019-12-11 | 2020-02-28 | 山东省泰安农业气象试验站 | Intelligent heating and sun shading sunlight temperature control system and method |
| CN113068546A (en) * | 2021-03-31 | 2021-07-06 | 广东积微科技有限公司 | Air conditioner control method for greenhouse low-temperature refrigeration |
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| CN200997803Y (en) * | 2006-11-14 | 2008-01-02 | 魏传文 | Kang type ground bed energy-saving greenhouse for planting |
| CN201219396Y (en) * | 2008-05-15 | 2009-04-15 | 卢林章 | Sunlight greenhouse |
| CN201270695Y (en) * | 2008-09-25 | 2009-07-15 | 北京航天华阳环境工程有限公司 | Combined greenhouse with unsymmetrical roofing |
| CN102405802A (en) * | 2011-09-02 | 2012-04-11 | 山东省果树研究所 | Environmental temperature and humidity semi-automatic regulation and control system for blueberry tender shoot cuttage seedling culture |
| CN202697362U (en) * | 2012-04-25 | 2013-01-30 | 于春娇 | A novel cultivation greenhouse |
| CN102812871B (en) * | 2012-06-29 | 2014-05-07 | 北京市农业技术推广站 | Energy-saving seedling-cultivating suspended Kang for sunlight greenhouse |
| CN103141339B (en) * | 2013-03-29 | 2015-01-07 | 涂维浩 | Greenhouse with adjustable height and gradient |
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