CN106613609A - Seedling growing planting method of maidenhair trees - Google Patents
Seedling growing planting method of maidenhair trees Download PDFInfo
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- CN106613609A CN106613609A CN201610863305.4A CN201610863305A CN106613609A CN 106613609 A CN106613609 A CN 106613609A CN 201610863305 A CN201610863305 A CN 201610863305A CN 106613609 A CN106613609 A CN 106613609A
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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
- A01G17/00—Cultivation of hops, vines, fruit trees, or like trees
- A01G17/005—Cultivation methods
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C1/00—Apparatus, or methods of use thereof, for testing or treating seed, roots, or the like, prior to sowing or planting
Abstract
The invention discloses a seedling growing planting method of maidenhair trees, and belongs to the field of planting. The method particularly comprises the following steps of 1, seed collection; 2, seed soaking; 3, bud forcing treatment; 4, sowing and seedling growing; 5, finished healthy and strong seedling cultivation; 6, transplanting planting; 7, management after planting. All the steps are reasonable in matching, cultivated finished healthy and strong seedlings are good in physique and high in resistance, can still normally survive in seriously salinated soil and is good in nutrition absorption and conversion property, the utilization rate of fertilizer can be increased, the problems that in the prior art, the fertilizer applying amount is too large, and soil is hardened are gradually relieved, and planting improvement of the maidenhair trees returns to sound development. Flavonoid compounds in the finally cultivated maidenhair trees are large in content, and high economic value is achieved.
Description
Technical field
The invention belongs to field of planting, and in particular to a kind of nursery implantation methods of ginkgo.
Background technology
Ginkgo is Ginkgoaceae, Ginkgo deciduous tree, gymnosperm, also known as maidenhair tree, Gong Sunshu etc..Ginkgo occurs in
It is to carry over most ancient few survivors seeds after quaternary glacier motion before 2.7 hundred million years, have the title of " living fossil ".Ginkgo has
There is high economic worth, medical value and Landscape Application value.If Folium Ginkgo and seed are containing abundant flavonoids
The special active ingredient such as compound, terpene lactone, the effects such as resisting immunity, prevent senile dementia and diabetes with regulation.
The modes of reproduction of ginkgo mainly has the methods such as seed propagation, tillering propagation, cutting propagation and propagation by grafiting.Wherein, sow numerous
Grow most widely used, typically using field seeding.Because gingko seedses kind skin it is thicker, before seeding and seedling raising at usual needs
Reason, it is now many using methods such as husky Tibetan, water logging, HORMONE TREATMENTs to improve its bud ratio, though certain effect can be played, but still reach
Less than it is intended that level.Additionally, existing implantation methods are the growths for promoting ginkgo by a large amount of applying fertilizer mostly,
For plant itself is but without improvement, the long-term fertilizer that applies can cause soil fertility to decline again, and hardened, salinization of soil phenomenon is more and more tighter
The problem of weight, and the performance such as salt resistance alkali of ginkgo itself is not good, eventually has a strong impact on the development of ginkgo, and reduce it
Quality, this has resulted in vicious circle.In order to preferably promote the development of ginkgo planting industry, certainly will improve in prior art
The drawbacks of, seek a kind of more excellent implantation methods.
The content of the invention
In order to solve the above problems, the invention provides a kind of nursery implantation methods of ginkgo.
The present invention is achieved through the following technical solutions：
A kind of nursery implantation methods of ginkgo, comprise the steps：
（1）Seed collection：
The healthy and strong elite stand that growth selection is fast, result is early, yield is high, quality is excellent is collected seed, eluriate after the seed demucilage after adopting,
Seed is obtained after drying standby；
（2）Seed soaking：
By step（1）The seed of selection is put into 40 ~ 50min of immersion treatment in the liquor potassic permanganate that volumetric concentration is 0.3 ~ 0.4%
Afterwards, taking-up is rinsed well with clear water, then puts it in seed-soaking liquid 3 ~ 4h of immersion, is finally drawn off being rinsed well with clear water standby
With；The material composition that the seed-soaking liquid is by following percentage by weight：Potassium nitrate 0.2 ~ 0.4%, sodium chloride 0.3 ~ 0.5%, amine are fresh
200 ~ 300ppm of ester, lead tetrachloride 0.01 ~ 0.03%, B B-complex 0.5 ~ 1%, sucrose 0.5 ~ 1%, magnesium sulfate 0.2 ~ 0.5%, it is remaining
Measure as water；Gingko seedses are coerced with potassium, sodium, lead, magnesium elements, the activity of seed can be improved, promote it to sprout, complex amine
The action effect of fresh ester is more preferably；
（3）Vernalization is processed：
A. by step（2）Gingko seedses after process are put in glass jar, and alkaline water is filled in glass jar；Solution acid-basicity is
A key factor for affecting seed to sprout, people typically seek optimal pH value carries out immersion treatment, but in actual applications
It was found that, although weak acid（PH value is 6.0 ~ 7.0）And weak base（PH value is 7.0 ~ 8.0）For the sprouting of ginkgo seed immersion treatment
Facilitation effect is higher, but reaches and cannot be further continued for after certain bottleneck lifting, and selects the of a relatively high alkaline water of alkalescence, coordinates tool
There is the microwave treatment of stronger seed modifying function, with good synergy, and weak acid（PH value is 6.0 ~ 7.0）Or weak base
（PH value is 7.0 ~ 8.0）Solution does not but reach this effect, may is that it for Interior Seed material influence degree and effect
Mechanism is different, and the of a relatively high alkaline water of alkalescence improves the activity of the moieties that the above two cannot lift, and for majority
The inhibitory action of material has been carried out making up, improved by microwave, and then overcomes the bottleneck problem of lifting；
B. the glass jar obtained by operation a is put in germinating box, it is 27 ~ 32 DEG C to control the temperature in germinating box；
C. simultaneously to gingko seedses applying microwave treatment in germinating box；Microwave can improve the work of the materials such as seed majority enzyme
Property, its sprouting is promoted, coordinate the use of alkaline water, effect is more excellent；
D. common vernalization is standby after processing and taking out in seed after 6 ~ 8h；
（4）Seeding and seedling raising：
By step（3）Seed after vernalization process point in the way of distance between rows and hills 30 ~ 35cm × 20 ~ 25cm is sowed on seedling bed, is broadcast
The amount of kind is 20 ~ 25kg/ mus, and after planting keeping temperature is 17 ~ 22 DEG C, until bringing out the seedling that height is 3 ~ 4cm；
（5）Finished product healthy seedling is cultivated：
After seedling length is to 3 ~ 4cm, further cultivation is proceeded by, the temperature for controlling daytime is 23 ~ 26 DEG C, night temperatures are 14
~ 17 DEG C, keep ground moistening not arid, and carried out Primary field process operation to seedling every 2 ~ 3 days, until it grows up to height
For the finished product healthy seedling of 35 ~ 45cm；Magnetic field process is carried out during seedling grows up, can be improved and be promoted growing for seedling, can
Time correspondence will be bred as and shorten 30% or so, and seedlings root prosperity, strong stress resistance, transplant planting survival rate will be high, later stage plant
Quality is higher；
（6）Transplant planting：
By step（5）The finished product healthy seedling cultivated is colonized in the big Tanaka of plantation, male and female in the way of distance between rows and hills 3 ~ 4m × 2 ~ 3m
The quantity ratio of strain is 94 ~ 97:5, pour a root water after the completion of field planting immediately；
（7）Manage after field planting：
Carry out rich water applying, middle weeding, pest management operation after the completion of field planting in time, it is ensured that the healthy growth of ginkgo.
Further, step（2）Described in B B-complex in contain vitamin A, vitamin B1, FA, dimension
Raw element C, vitamin D and vitamin K.
Further, step（3）Alkaline water described in operation a is that distilled water is adjusted to into pH value to form for 8.5 ~ 9.5,
It is 4 ~ 5 with the mass ratio that gingko seedses are put in glass jar:1.
Further, step（3）The power of the microwave treatment described in operation c is 400 ~ 500W.
Further, step（4）Described in seedling bed by following weight portion material composition：4 ~ 7 parts of coconut shell flours, 8 ~ 10
Part vermiculite, 20 ~ 25 parts of turfy soils, 2 ~ 3 parts of diatomite, 10 ~ 15 parts of the farmers''s excrement that become thoroughly decomposed, 3 ~ 5 parts of Chinese herb residues, 3 ~ 4 parts of river sands.
Further, described Chinese herb residues by following weight portion material composition：6 ~ 8 parts of Radix Isatidis, 4 ~ 7 parts of roots of large-flowered skullcap, 3
~ 5 portions of dried peppermint leaves, 1 ~ 3 portion of schizonepeta, 2 ~ 4 portions of radix aconiti agrestis, 5 ~ 8 portions of fuling peels, 3 ~ 5 portions of fruit ofs Chinese magnoliavine.
Further, step（5）Described in magnetic field process intensity be 300 ~ 400mT, every time persistently to seedling process 2 ~
3h。
The present invention has the advantages that：
（1）The present invention is processed by unique seed-soaking liquid prepared, and special vernalization, can well improve ginkgo seed
Characteristic, broken its dormancy, promote its sprouting, remove base portion kind skin, prolonged husky mechanical damage need not be being carried out
The mode of operation that Tibetan process etc. takes time and effort, just can accelerate the sprouting of seed, and germination percentage is promoted to into more than 96%, compare
The germination percentage of existing method improves more than 15%, and germinating time correspondence is shortened 5 days or so, shortens implantation time and cost.
（2）It is the key for determining ginkgo later stage growing way and quality during being bred as to finished product healthy seedling after seed germination
In the stage, specially treated is had no to this in existing method, and the magnetic field that this method applies during this period some strength to it is processed, energy
Improve the physique of seedling well, promote its root development, strengthen its nutrient absorption property, lift the work of most materials in plant
Property, accelerates its growth rate, and can further improve the anti-adversities such as its drought resisting, salt resistance alkali, it is ensured that plant survives
Rate.
（3）Under the reasonable coordination of each step, the physique of the finished product healthy seedling educated is good, resistance, saline and alkaline for the present invention
Change and normal survival is remained in serious soil, and nutrient absorption, conversion characteristic are preferably, can improve the utilization rate of fertilizer, gradually change
The problems such as being apt to excessive fertilizer applied amount in prior art, soil compaction, the plantation of ginkgo is improved and is revert in benign development
Come.Flavonoid content is more in the ginkgo body finally educated, and economic worth is higher.
Specific embodiment
Embodiment 1
A kind of nursery implantation methods of ginkgo, comprise the steps：
（1）Seed collection：
The healthy and strong elite stand that growth selection is fast, result is early, yield is high, quality is excellent is collected seed, eluriate after the seed demucilage after adopting,
Seed is obtained after drying standby；
（2）Seed soaking：
By step（1）The seed of selection is put in the liquor potassic permanganate that volumetric concentration is 0.3% after immersion treatment 40min, is taken out
Rinsed well with clear water, then put it into and soak in seed-soaking liquid 3h, be finally drawn off being rinsed well with clear water standby；The leaching
Plant the material composition that liquid is by following percentage by weight：Potassium nitrate 0.2%, sodium chloride 0.3%, diethyl aminoethyl hexanoate 200ppm, lead tetrachloride
0.01%th, B B-complex 0.5%, sucrose 0.5%, magnesium sulfate 0.2%, balance of water；
（3）Vernalization is processed：
A. by step（2）Gingko seedses after process are put in glass jar, and alkaline water is filled in glass jar；
B. the glass jar obtained by operation a is put in germinating box, it is 27 ~ 29 DEG C to control the temperature in germinating box；
C. simultaneously to gingko seedses applying microwave treatment in germinating box；
D. common vernalization is standby after processing and taking out in seed after 6h；
（4）Seeding and seedling raising：
By step（3）Seed after vernalization process point in the way of distance between rows and hills 30cm × 20cm is sowed on seedling bed, and application rate is
20kg/ mus, after planting keeping temperature is 17 ~ 20 DEG C, until bringing out seedling of the height for 3 ~ 4cm；
（5）Finished product healthy seedling is cultivated：
After seedling length is to 3 ~ 4cm, further cultivation is proceeded by, the temperature for controlling daytime is 23 ~ 25 DEG C, night temperatures are 14
~ 16 DEG C, keep ground moistening not arid, and carried out Primary field process operation to seedling every 2 days, until it grows up to height being
The finished product healthy seedling of 35 ~ 45cm；
（6）Transplant planting：
By step（5）The finished product healthy seedling cultivated is colonized in the big Tanaka of plantation in the way of distance between rows and hills 3m × 2m, male and female plant
Quantity ratio is 94:5, pour a root water after the completion of field planting immediately；
（7）Manage after field planting：
Carry out rich water applying, middle weeding, pest management operation after the completion of field planting in time, it is ensured that the healthy growth of ginkgo.
Further, step（2）Described in B B-complex in contain vitamin A, vitamin B1, FA, dimension
Raw element C, vitamin D and vitamin K.
Further, step（3）Alkaline water described in operation a is that distilled water is adjusted to into pH value to form for 8.5 ~ 9.0,
It is 4 with the mass ratio that gingko seedses are put in glass jar:1.
Further, step（3）The power of the microwave treatment described in operation c is 400W.
Further, step（4）Described in seedling bed by following weight portion material composition：4 portions of coconut shell flours, 8 portions of leech
Stone, 20 parts of turfy soils, 2 parts of diatomite, 10 parts of the farmers''s excrement that become thoroughly decomposed, 3 parts of Chinese herb residues, 3 parts of river sands.
Further, described Chinese herb residues by following weight portion material composition：6 parts of Radix Isatidis, 4 parts of roots of large-flowered skullcap, 3 parts thin
Lotus leaf, 1 portion of schizonepeta, 2 portions of radix aconiti agrestis, 5 portions of fuling peels, 3 portions of fruit ofs Chinese magnoliavine.
Further, step（5）Described in magnetic field process intensity be 300mT, every time persistently to seedling process 2h.
Embodiment 2
A kind of nursery implantation methods of ginkgo, comprise the steps：
（1）Seed collection：
The healthy and strong elite stand that growth selection is fast, result is early, yield is high, quality is excellent is collected seed, eluriate after the seed demucilage after adopting,
Seed is obtained after drying standby；
（2）Seed soaking：
By step（1）The seed of selection is put in the liquor potassic permanganate that volumetric concentration is 0.4% after immersion treatment 50min, is taken out
Rinsed well with clear water, then put it into and soak in seed-soaking liquid 4h, be finally drawn off being rinsed well with clear water standby；The leaching
Plant the material composition that liquid is by following percentage by weight：Potassium nitrate 0.4%, sodium chloride 0.5%, diethyl aminoethyl hexanoate 300ppm, lead tetrachloride
0.03%th, B B-complex 1%, sucrose 1%, magnesium sulfate 0.5%, balance of water；
（3）Vernalization is processed：
A. by step（2）Gingko seedses after process are put in glass jar, and alkaline water is filled in glass jar；
B. the glass jar obtained by operation a is put in germinating box, it is 29 ~ 32 DEG C to control the temperature in germinating box；
C. simultaneously to gingko seedses applying microwave treatment in germinating box；
D. common vernalization is standby after processing and taking out in seed after 8h；
（4）Seeding and seedling raising：
By step（3）Seed after vernalization process point in the way of distance between rows and hills 35cm × 25cm is sowed on seedling bed, and application rate is
25kg/ mus, after planting keeping temperature is 20 ~ 22 DEG C, until bringing out seedling of the height for 3 ~ 4cm；
（5）Finished product healthy seedling is cultivated：
After seedling length is to 3 ~ 4cm, further cultivation is proceeded by, the temperature for controlling daytime is 24 ~ 26 DEG C, night temperatures are 15
~ 17 DEG C, keep ground moistening not arid, and carried out Primary field process operation to seedling every 3 days, until it grows up to height being
The finished product healthy seedling of 45cm；
（6）Transplant planting：
By step（5）The finished product healthy seedling cultivated is colonized in the big Tanaka of plantation in the way of distance between rows and hills 4m × 3m, male and female plant
Quantity ratio is 97:5, pour a root water after the completion of field planting immediately；
（7）Manage after field planting：
Carry out rich water applying, middle weeding, pest management operation after the completion of field planting in time, it is ensured that the healthy growth of ginkgo.
Further, step（2）Described in B B-complex in contain vitamin A, vitamin B1, FA, dimension
Raw element C, vitamin D and vitamin K.
Further, step（3）Alkaline water described in operation a is that distilled water is adjusted to into pH value to form for 9.0 ~ 9.5,
It is 5 with the mass ratio that gingko seedses are put in glass jar:1.
Further, step（3）The power of the microwave treatment described in operation c is 500W.
Further, step（4）Described in seedling bed by following weight portion material composition：7 portions of coconut shell flours, 10 portions of leech
Stone, 25 parts of turfy soils, 3 parts of diatomite, 15 parts of the farmers''s excrement that become thoroughly decomposed, 5 parts of Chinese herb residues, 4 parts of river sands.
Further, described Chinese herb residues by following weight portion material composition：8 parts of Radix Isatidis, 7 parts of roots of large-flowered skullcap, 5 parts thin
Lotus leaf, 3 portions of schizonepeta, 4 portions of radix aconiti agrestis, 8 portions of fuling peels, 5 portions of fruit ofs Chinese magnoliavine.
Further, step（5）Described in magnetic field process intensity be 400mT, every time persistently to seedling process 3h.
Comparative example 1
This comparative example 1 compared with Example 1, in step（3）When vernalization is processed, microwave treatment operation is not carried out, in addition
Method and step all same.
Comparative example 2
This comparative example 2 compared with Example 2, in step（5）Finished product healthy seedling is cultivated when processing, and is not carried out magnetic field and is processed behaviour
Make, method and step all same in addition.
Control group
Existing gingko seedses seedling cultivation technology.
In order to contrast effect of the present invention, from a collection of gingko seedses, respectively plantation cultivation is carried out with above-mentioned five kinds of methods,
Data are cultivated in the corresponding growth of statistics, specifically as shown in table 1：
Table 1
| Percentage of seedgermination（%） | Transplant planting survival rate（%） | Flavonoid content in 3 years raw ginkgo root skins（mg/g） | Flavonoid content in 5 years raw ginkgo root skins（mg/g） | |
| Embodiment 1 | 96.7 | 98.4 | 0.068 | 0.127 |
| Embodiment 2 | 97.1 | 98.7 | 0.071 | 0.124 |
| Comparative example 1 | 90.4 | 94.3 | 0.052 | 0.087 |
| Comparative example 2 | 96.2 | 92.4 | 0.046 | 0.090 |
| Control group | 83.5 | 91.2 | 0.032 | 0.058 |
As can be seen from the above table, the survival rate in the inventive method each stage is higher, flavone compound in the ginkgo body educated
Content is higher, and use value and quality preferably, improve well economic benefit.
Claims (7)
1. nursery implantation methods of a kind of ginkgo, it is characterised in that comprise the steps：
（1）Seed collection：
The healthy and strong elite stand that growth selection is fast, result is early, yield is high, quality is excellent is collected seed, eluriate after the seed demucilage after adopting,
Seed is obtained after drying standby；
（2）Seed soaking：
By step（1）The seed of selection is put into 40 ~ 50min of immersion treatment in the liquor potassic permanganate that volumetric concentration is 0.3 ~ 0.4%
Afterwards, taking-up is rinsed well with clear water, then puts it in seed-soaking liquid 3 ~ 4h of immersion, is finally drawn off being rinsed well with clear water standby
With；The material composition that the seed-soaking liquid is by following percentage by weight：Potassium nitrate 0.2 ~ 0.4%, sodium chloride 0.3 ~ 0.5%, amine are fresh
200 ~ 300ppm of ester, lead tetrachloride 0.01 ~ 0.03%, B B-complex 0.5 ~ 1%, sucrose 0.5 ~ 1%, magnesium sulfate 0.2 ~ 0.5%, it is remaining
Measure as water；
（3）Vernalization is processed：
A. by step（2）Gingko seedses after process are put in glass jar, and alkaline water is filled in glass jar；
B. the glass jar obtained by operation a is put in germinating box, it is 27 ~ 32 DEG C to control the temperature in germinating box；
C. simultaneously to gingko seedses applying microwave treatment in germinating box；
D. common vernalization is standby after processing and taking out in seed after 6 ~ 8h；
（4）Seeding and seedling raising：
By step（3）Seed after vernalization process point in the way of distance between rows and hills 30 ~ 35cm × 20 ~ 25cm is sowed on seedling bed, is broadcast
The amount of kind is 20 ~ 25kg/ mus, and after planting keeping temperature is 17 ~ 22 DEG C, until bringing out the seedling that height is 3 ~ 4cm；
（5）Finished product healthy seedling is cultivated：
After seedling length is to 3 ~ 4cm, further cultivation is proceeded by, the temperature for controlling daytime is 23 ~ 26 DEG C, night temperatures are 14
~ 17 DEG C, keep ground moistening not arid, and carried out Primary field process operation to seedling every 2 ~ 3 days, until it grows up to height
For the finished product healthy seedling of 35 ~ 45cm；
（6）Transplant planting：
By step（5）The finished product healthy seedling cultivated is colonized in the big Tanaka of plantation, male and female in the way of distance between rows and hills 3 ~ 4m × 2 ~ 3m
The quantity ratio of strain is 94 ~ 97:5, pour a root water after the completion of field planting immediately；
（7）Manage after field planting：
Carry out rich water applying, middle weeding, pest management operation after the completion of field planting in time, it is ensured that the healthy growth of ginkgo.
2. a kind of nursery implantation methods of ginkgo according to claim 1, it is characterised in that step（2）Described in
Contain vitamin A, vitamin B1, FA, vitamin C, vitamin D and vitamin K in B B-complex.
3. a kind of nursery implantation methods of ginkgo according to claim 1, it is characterised in that step（3）Institute in operation a
The alkaline water stated is that distilled water is adjusted to into pH value to form for 8.5 ~ 9.5, its quality put in glass jar with gingko seedses
Than for 4 ~ 5:1.
4. a kind of nursery implantation methods of ginkgo according to claim 1, it is characterised in that step（3）Institute in operation c
The power of the microwave treatment stated is 400 ~ 500W.
5. a kind of nursery implantation methods of ginkgo according to claim 1, it is characterised in that step（4）Described in
Seedling bed by following weight portion material composition：4 ~ 7 portions of coconut shell flours, 8 ~ 10 portions of vermiculites, 20 ~ 25 portions of turfy soils, 2 ~ 3 portions of diatoms
Soil, 10 ~ 15 parts of the farmers''s excrement that become thoroughly decomposed, 3 ~ 5 parts of Chinese herb residues, 3 ~ 4 parts of river sands.
6. nursery implantation methods of a kind of ginkgo according to claim 5, it is characterised in that described Chinese herb residues by
The material composition of following weight portion：6 ~ 8 parts of Radix Isatidis, 4 ~ 7 parts of roots of large-flowered skullcap, 3 ~ 5 parts of dried peppermint leaves, 1 ~ 3 portion of schizonepeta, 2 ~ 4 portions of radix aconiti agrestis, 5 ~
8 portions of fuling peels, 3 ~ 5 portions of fruit ofs Chinese magnoliavine.
7. a kind of nursery implantation methods of ginkgo according to claim 1, it is characterised in that step（5）Described in magnetic
The intensity that field is processed is 300 ~ 400mT, every time persistently to seedling 2 ~ 3h of process.
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| CN107548985A (en) * | 2017-08-28 | 2018-01-09 | 贵州福生源生态农业开发有限公司 | A kind of wild gleditsia sinensis seed seedling-raising method |
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| CN109005974A (en) * | 2018-08-31 | 2018-12-18 | 梓潼县天鼓银杏种植专业合作社 | A kind of nursery implantation methods of ginkgo |
| CN109258281A (en) * | 2018-11-20 | 2019-01-25 | 界首市芙乐园农业发展有限公司 | A kind of seeding growing seedlings method of dove tree |
| CN110915533A (en) * | 2019-12-18 | 2020-03-27 | 句容市乡土树种研究所 | Cultivation method for improved variety and strong seedling of zelkova serrata |
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| CN109258281A (en) * | 2018-11-20 | 2019-01-25 | 界首市芙乐园农业发展有限公司 | A kind of seeding growing seedlings method of dove tree |
| CN110915533A (en) * | 2019-12-18 | 2020-03-27 | 句容市乡土树种研究所 | Cultivation method for improved variety and strong seedling of zelkova serrata |
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