CN103348875A - Pear tree form shaped like Chinese character 'Mi' and shaping method thereof - Google Patents
Pear tree form shaped like Chinese character 'Mi' and shaping method thereof Download PDFInfo
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Abstract
The invention belongs to the field of pomology and fruit tree ecology and discloses a pear tree form shaped like a Chinese character 'Mi' and a shaping method thereof. The tree form is composed of one main trunk, eight backbone branches, and 200-240 branch groups. The eight backbone branches use the main trunk as a central point and respectively extend toward 8 directions so as to form a tree body framework shaped like a Chinese character 'Mi'. The base angle of the backbone branches is 30-45 degrees. The waist angle is 75-90 degrees. The tip angle is 40-50 degrees. Each backbone branch is provided with 25-30 branch groups which comprise a large-scale branch group, 3-4 medium-sized branch groups and 20-25 small branch groups. The tree form integrates the advantages of a pear canopy frame type tree form and an open-heart-shaped tree form, and has the advantages of being shortened in tree crown, balanced and stable in tree vigor, strong in wind resistant capacity of fruits, even in size of fruits, good in quality of fruits, high in commodity rate, simple, convenient and labor-saving to trim, and the like. The pear tree form is suitable for being cultivated in southeast coastal areas where typhoons occur often.
Description
Technical field
The present invention relates to the tree-like and shaping methods of a kind of pear tree " rice " font, belong to pomology, fruit tree field of ecology.
Background technology
The tree-like of pear tree is the important content of pear tree cultivation, and different tree structures is very large to management difficulty or ease, tree vigo(u)r, output and the quality influence of pear tree.At present, China pear tree produces that adopt main tree-like has the layering of evacuation shape, spindle, shape, shed frame type are tree-like etc. happily.Evacuating layering shape is the traditional tree-like of northern pear tree, and tree crown is tall and big, skeleton is firm, the life-span is long, high yield, stable yields, manages the shortcomings such as inconvenient, that fruit quality is very different but exist.Spindle (natural spindle, improved-spindle etc.) has fast, the early bearing high yield of being shaped, the plurality of advantages such as manageable, is that to be suitable for the high yield of northern planting culture tree-like.The many employings in theatre, south happy shape (three open-center shape, " Y " font etc.), it is simple to have tree structure, and ventilation and penetrating light is good, and fruit quality is good, the commodity rate advantages of higher.
Southeastern coast is the main producing region of China Chinese pear, and cultivation history is long, and germ plasm resource is abundant.Compare with the north, south of the River warmer climate is moistening, and the fruit maturing stage early has significantly " precocity " advantage.Therefore, the development of its jargonel has obvious industrial advantage.But in the industry development process, exist the problems such as typhoon influence, kind is single, the listing phase concentrates, not high, the relative benefit of integrated quality is lower, wherein typhoon is that the southeastern coast pears already develop maximum restraining factors.
Japan since last century the '30s adopt the mode of pergola system to solve the problem of windburn, not only by the canopy rack fixedly branch strengthened wind loading rating, shedding and mechanical damage that windburn causes have obviously been reduced, and the tree-like tree vigo(u)r of shed frame type is balanced, branches and leaves are evenly distributed, illumination is good, and fruit size is neat, and is best in quality.China from the nineties initial stage in last century introduce from Japan with test spread since, the development of frame pear cultivation is very fast, and has obtained certain effect, the investment of frame material is large, high to the fertilizer and water condition requirement, slow, the shortcoming such as early yield is low is shaped but also show.
The pears greenhouse cultivation can be done sth. in advance 20 ~ 30 days Maturation of Pear Fruits phases, has not only avoided the impact of typhoon, and has filled up the blank in market, has given prominence to the advantage of " early ", has solved the problem of " wind ", greatly improves the market competitiveness and economic benefit.Because the restriction of booth height, it is higher to produce at present the upper common tree-like tree crown of using, and all is unwell in greenhouse cultivation and uses; Simultaneously, booth is the regional environment of a relatively-high temperature, high humidity, low light level photograph, and it is tree-like to develop high light efficiency a kind of suitable greenhouse cultivation, that tree crown is downgraded, ventilation and penetrating light is good.
Summary of the invention
Technical problem to be solved by this invention is to overcome deficiency of the prior art, and provides a kind of and be suitable for the many typhoon regions of southeastern coast, has stronger wind loading rating and be suitable for the Pear trees shape of greenhouse cultivation.
The technical scheme that the present invention solves the problems of the technologies described above employing is: a kind of pear tree " rice " font is tree-like, it is characterized in that: described tree-like " rice " font that is in the horizontal direction is made of 1 trunk, 8 skeleton branches and 200 ~ 240 branch groups; Described trunk height 40 ~ 50cm, the height of tree 1.9 ~ 2.3 m, crown diameter 4.0 ~ 4.2 m; Described 8 skeleton branches point centered by trunk extends to 8 different azimuth respectively, forms the tree body skeleton of " rice " font; Described skeleton branch length is 1.8 ~ 2.8m, 30 ° ~ 45 ° of base angles, 75 ° ~ 90 ° of haunch, 40 ° ~ 50 ° at tip angle.
Have 25 ~ 30 branch groups on tree-like each skeleton branch of pear tree of the present invention " rice " font, comprise that 1 large-scale branch group, 3 ~ 4 medium-sized branch groups and 20 ~ 25 small-sized branches organize; It is 650 ~ 800 that full tree stays the branch amount, and the quantitative proportion of long shoot, middle branch, brachyplast is 1:1:2.5.
The tree-like shaping methods of pear tree of the present invention " rice " font is characterized in that: skeleton branch adopts three sections cultivations, may further comprise the steps:
A, first paragraph are cultivated: nursery stock heading height 40 ~ 50cm; The long tip of sprouting at trunk then reaches more than the 60cm and approaches does the pinching processing when stopping the tip, and draws at an upper portion thereof branch to be arc; The fallen leaves dormancy was removed and is drawn dendritic attitude in front 1 ~ 2 month, allowed tip angle naturally go up; Select 2 ~ 4 long tips during winter pruning and make skeleton branch, wipe out the secondary taper and divide as the cultivation of skeleton branch first paragraph, the clip bud stays bud, removes simultaneously the low branch of inserted part on the trunk, and the residue branch is made auxiliary support branch and cultivated;
B, second segment cultivate: Second Year, treat that the long tip of sprouting on the first paragraph skeleton branch approaches to do identical pinching with First Year when stopping the tip and draw a processing; The fallen leaves dormancy was removed and is drawn dendritic attitude in front 1 ~ 2 month, allowed tip angle naturally go up; Select 8 nearly horizontal stretchings, the basically identical long tip of growing way during winter pruning, extending head stays bud to wipe out the secondary taper to divide as the skeleton branch second segment and cultivate, 8 long tips selecting draw fixing by the spatial distribution of " rice " font in the horizontal direction, remove simultaneously the long tip of intersection, overlapping growth, remainder keeps the result and cultivates into large-scale fruit-bearing shoot cluster;
C, the 3rd section cultivation: the 3rd year, treat that the elongated shoot that sprouts on the second segment skeleton branch stops tip post-tensioning branch and is 45 °; Stay outer lateral bud to cut off the elongated shoot head portion during winter pruning, as the 3rd section cultivation of skeleton branch;
D, adopt the three sections general cultivations that can finish skeleton branch in 3 years of cultivation, uncompleted can continue to replenish according to identical method in the 4th year cultivate; Elongated shoot to skeleton branch when approaching the envelope row keeps continuously heavy cutting back of 20cm, Feng Hanghou appropriateness retraction.
After the tree body is shaped, skeleton branch first paragraph length 0.6 ~ 1.0m, its outer end terrain clearance 0.8 ~ 1.0m, skeleton branch second segment length 1.2 ~ 1.6m, its outer end terrain clearance 0.8 ~ 1.5m, skeleton branch the 3rd segment length 0.7 ~ 1.0m, its outer end terrain clearance 1.5 ~ 2.0m.
In the tree-like shaping methods of pear tree of the present invention " rice " font, cultural method of its medium and small branch group is:
Beginning in the 3rd year keeps 15 ~ 20cm to the long shoot on the shaping skeleton branch during winter pruning and does the cutting back processing, and the young sprout that sprout at the cutting back place is done pinching and processed when surpassing 20cm, repetition pinching when the secondary tip length of sprouting surpasses 20cm;
In keeping during the next year winter pruning that second and third bud position, cutting back place sprouts, brachyplast stays stake to prune to form medium and small branch group, the control branch is organized spacing at 15 ~ 25cm.
The problems such as the present invention is tall and big mainly for multiple, the conventional tree-like tree crown of southeastern coastal areas typhoon, easy shedding, combine the tree-like advantage of the tree-like and happy shape of shed frame type, new wound is a kind of, and to have a high light efficiency of pear tree of good wind resistance and productivity tree-like, is suitable for the many typhoon regions of southeastern coast and greenhouse cultivation.Compared with prior art, have following advantage and effect: 1. the nearly level of skeleton branch and is given birth to, and is evenly distributed, and in picturesque disorder, the tree vigo(u)r balance is sane; 2. tree crown is downgraded, and the fruit inserted part is low and concentrated, and wind loading rating is strong; 3. illumination is sufficient, and fruit is large, of fine quality, size is even, and commodity rate is high; 4. branch class level time minimizing, subordinate is clearly demarcated, and pruning rate is little, easy saving of labor.
Below set forth particularly beneficial effect of the present invention by comparison of test results:
Tree-like the comparing of the tree-like and happy shape of " rice " font, the happy tree-like skeleton branch of shape generally is 50 ° ~ 60 ° and extends upward, and the tree-like skeleton branch of " rice " font middle part is nearly horizontal extension, terrain clearance than the former short 20cm about, thereby increased wind resistance.Tree-like total the amount of 4 years life " rice " fonts, effectively branch amount and bud number average are significantly higher than natural open centre shape, and wherein flower bud number increases by 107.7%, illustrate that " rice " font is tree-like also to have a stronger early high-yield ability.From setting fruit position, the tree-like fruit inserted part of " rice " font is more concentrated, take middle lower curtate as main.Fruit can be divided into 3 levels according to giving birth to height, and 70cm is following, 70 ~ 90cm, respectively account for 1/3rd more than the 90cm, wherein the fruit of giving birth to highly above 100cm only account for 13.0% of total fruit amount.And 34.7% fruit is distributed in trunk 50cm, and 53.7% fruit is distributed in between trunk 50 ~ 100cm, only has 11.6% fruit to surpass 100cm apart from trunk, thereby improved greatly the wind loading rating of fruit.
" rice " font is tree-like to be compared with shed frame type is tree-like, reaching in the identical wind loading rating situation, has saved frame and has built cost, shortens pear tree juvenile stage 3 ~ 4 years, has reduced management difficulty, has greatly shortened investment return period.
Take ' emerald green hat ' pears as example, employing " rice " font is tree-like plants in the hybrid beam-connected greenhouse of cement bamboo wood, and per mu yield can reach more than the 1600kg, and per mu yield is worth 1.5 ten thousand yuan, 1.1 ten thousand yuan of mu profits.Mean fruit weight 269g, peel smooth is and thin, and fruit face rust staining is few, and outward appearance is good.Fruit soluble solids content 12%～13%, about sugar-acid ratio 70:1, the crisp exquisiteness of meat, quality is splendid.
Description of drawings
Fig. 1: the plan structure schematic diagram that pear tree " rice " font is tree-like;
Fig. 2: the structural representation that skeleton branch is three sections;
Fig. 3: the cultural method schematic diagram of medium and small branch group.
Embodiment
The invention will be further described below by embodiment:
Pear tree " rice " font is tree-like, is made of 1 trunk, 8 skeleton branches and 200 ~ 240 branch groups.Trunk height 40 ~ 50cm, the height of tree 1.9 ~ 2.3 m, crown diameter 4.0 ~ 4.2 m; 8 skeleton branches point centered by trunk extends to 8 different azimuth respectively, forms the tree body skeleton of " rice " font.Skeleton branch length is 1.8 ~ 2.8m, 30 ° ~ 45 ° of base angles, and 75 ° ~ 90 ° of haunch, 40 ° ~ 50 ° at tip angle has 25 ~ 30 branch groups on each skeleton branch, comprise 1 large-scale branch group, 3 ~ 4 medium-sized branch groups and 20 ~ 25 small-sized branch groups.It is 650 ~ 800 that full tree stays the branch amount, and the quantitative proportion of long shoot, middle branch, brachyplast is 1:1:2.5.
Embodiment 1:
Present embodiment adopts the method for the conventional outdoor cropping of pear tree, and kind is " emerald green hat ", comprises the steps:
(1) fixed doing and then nursery stock management.Select the field planting in strong sprout, heading height 40 ~ 50cm.Mostly reach more than the 60cm and approach at first vice-minister's tip and do pinching when stopping the tip and process, and pull into arc, the conversion apical dominance, the short-and-medium tip that inspires on the trunk forms the new long tip.Treat that the new long tip approaches and make same treatment when stopping the tip.Fall leaves and untied all in front 1 ~ 2 month by being drawn branch, allow the branch angle naturally go up.Can turn out a plurality of robust growth to the end of the year, length is at 80 ~ 100cm, the long tip at 30 ° ~ 45 ° of base angles, 90 ° of haunch, 45 ° at tip angle.2 ~ 4 the long tips of selecting and remain during winter pruning are made skeleton branch, wipe out its secondary taper and divide and make the skeleton branch first paragraph and cultivate, and the clip bud stays bud, and all the other branches are all done the auxiliary support branch cultivation except the too low need of inserted part remove.
(2) Second Year tree body management.Treat that the long tip sprouted on the first paragraph skeleton branch approaches when stopping the tip and make same treatment with First Year, at the bottom of drawing a year after next 2 ~ 3 times, can form 8 ~ 15 nearly horizontal stretchings, the uniform long tip of basically identical, the spatial distribution of growing.Select and remain during winter pruning 8 nearly horizontal stretchings, the basically identical long tip grows, extending head stays bud to wipe out the secondary taper to divide as the skeleton branch second segment and cultivate, and 8 long tips selecting draw fixing by the spatial distribution of " rice " font in the horizontal direction.Simultaneously, remove the long tip of intersection, overlapping growth, remainder keeps the result and cultivates into large-scale fruit-bearing shoot cluster.
The management of (3) the 3rd years tree bodies.The 3rd year, treat that the elongated shoot that sprouts on the second segment skeleton branch stops tip post-tensioning branch and is 45 °, stay outer lateral bud to cut off the elongated shoot head portion during winter pruning, so far, tree-like skeleton branch part has made up to be finished, during winter pruning the long shoot on the skeleton branch is kept 15 ~ 20cm and do the cutting back processing, the young sprout that sprout at the cutting back place is done pinching and is processed when surpassing 20cm, repetition pinching when the secondary tip length of sprouting surpasses 20cm.
(4) firstfruits tree tree body management.1 year, keep during winter pruning that second and third bud position, cutting back place sprouts in, brachyplast stays stake to prune to form fixing medium and small fruit-bearing shoot cluster, the control branch is organized spacing at 15 ~ 25cm.Elongated shoot to skeleton branch when approaching the envelope row keeps continuously heavy cutting back of 20cm, Feng Hanghou appropriateness retraction.
(5) bearing tree tree body management.After entering high yield period, strengthen continuous pinching or the cutting back of internal thorax enriching shoot, remove simultaneously overstocked developmental branch, the growth of thorax branch in the control is to promote nutrient accumulation and fruit development.Again cultivate after the suitable long tip drew branch to process near weak skeleton branch or large-scale fruit bearing shoot tissue selected and remain, make skeleton branch or fruit-bearing shoot cluster keep good nutrition supply and branch to take out the ability of sending out, and keep short and do, low hat, as a result colony that ventilation and penetrating light is good.
The pruning of other pear tree can be adopted known technology.
Embodiment 2:
Present embodiment adopts the method for pear tree greenhouse cultivation, and kind is ' emerald green hat ', comprises the steps:
(1) fixed doing and then nursery stock management.Select the field planting in strong sprout, heading height 40 ~ 50cm.Mostly reach more than the 60cm and approach at first vice-minister's tip and do pinching when stopping the tip and process, and pull into arc, the conversion apical dominance, the short-and-medium tip that inspires on the trunk forms the new long tip.Treat that the new long tip approaches and make same treatment when stopping the tip.Fall leaves and untied all in front 1 ~ 2 month by being drawn branch, allow the branch angle naturally go up.Can turn out a plurality of robust growth to the end of the year, length is at 80 ~ 100cm, the long tip at 30 ° ~ 45 ° of base angles, 90 ° of haunch, 45 ° at tip angle.2 ~ 4 the long tips of selecting and remain during winter pruning are made skeleton branch, wipe out its secondary taper and divide and make the skeleton branch first paragraph and cultivate, and the clip bud stays bud, and all the other branches are all done the auxiliary support branch cultivation except the too low need of inserted part remove.
(2) Second Year tree body management.Treat that the long tip sprouted on the first paragraph skeleton branch approaches when stopping the tip and make same treatment with First Year, at the bottom of drawing a year after next 2 ~ 3 times, can form 8 ~ 15 nearly horizontal stretchings, the uniform long tip of basically identical, the spatial distribution of growing.Select and remain during winter pruning 8 nearly horizontal stretchings, the basically identical long tip grows, extending head stays bud to wipe out the secondary taper to divide as the skeleton branch second segment and cultivate, and 8 long tips selecting draw fixing by the spatial distribution of " rice " font in the horizontal direction.Simultaneously, remove the long tip of intersection, overlapping growth, remainder keeps the result and cultivates into large-scale fruit-bearing shoot cluster.
The management of (3) the 3rd years tree bodies.Treat that the elongated shoot that sprouts on the second segment skeleton branch stops tip post-tensioning branch and is 45 °.Draw branch except the method by the first two years that does not reach the shaping requirement and process cultivation skeleton branch or the large-scale branch group, the long shoot on all the other skeleton branches carries out pinching when the long 20 ~ 30cm of young sprout, or waits to approach and carry out the cutting back processing when stopping the tip.The branch stake that keeps sprouts two vice-minister's tips at clip bud place, in second and third bud position can develop into, fruit spur, keeps fruit branch during winter pruning, divides and forms fixing fruit bearing shoot group thereby wipe out two vice-minister's tapers.Build cement bamboo wood beam-connected greenhouse the end of the year, booth is risen 3.5 ~ 4m, shoulder height 2 ~ 2.2m.
(4) booth tree body management.Greenhouse cultivation is because of the impact of greenhouse-environment, and branch is nourished and grown vigorous, and disease occurs few, and vegetative period is long, and branch is relatively elongated, and bud forms easily.Cutting of skeleton branch elongated shoot to bearing tree stays length should remain on about 20cm, to keep good growth potential.When skeleton branch bumps or is overlapping, should in time bounce back, keep good permeability.Many cutting backs in the pruning of branch group, the youthful and the elderly is put, and the good general reservation 2/3rds of long shoot of flower bud development of sprouting is then suitably bounced back as good bearing basal shoot, and the visual space situation takes the circumstances into consideration to cultivate into large and medium-sized fruit-bearing shoot cluster; The large and medium-sized branch of decline is organized near the suitable long tip of selecting and remain again cultivate, keep renewal and the vigor of branch group; Can be removed or cutting back during branch group tip occurs, during long shoot, avoid setting fruit position to move outward.
The pruning of other pear tree can be adopted known technology.
Claims (5)
1. a pear tree " rice " font is tree-like, it is characterized in that: described tree-like " rice " font that is in the horizontal direction is made of 1 trunk, 8 skeleton branches and 200 ~ 240 branch groups; Described trunk height 40 ~ 50cm, the height of tree 1.9 ~ 2.3 m, crown diameter 4.0 ~ 4.2 m; Described 8 skeleton branches point centered by trunk extends to 8 different azimuth respectively, forms the tree body skeleton of " rice " font; Described skeleton branch length is 1.8 ~ 2.8m, 30 ° ~ 45 ° of base angles, 75 ° ~ 90 ° of haunch, 40 ° ~ 50 ° at tip angle.
2. tree-like according to pear tree claimed in claim 1 " rice " font, it is characterized in that: have 25 ~ 30 branch groups on each skeleton branch, comprise 1 large-scale branch group, 3 ~ 4 medium-sized branch groups and 20 ~ 25 small-sized branch groups; It is 650 ~ 800 that full tree stays the branch amount, and the quantitative proportion of long shoot, middle branch, brachyplast is 1:1:2.5.
3. the tree-like shaping methods of pear tree " rice " font is characterized in that: skeleton branch adopts three sections cultivations, may further comprise the steps:
A, first paragraph are cultivated: nursery stock heading height 40 ~ 50cm; The long tip of sprouting at trunk then reaches more than the 60cm and approaches does the pinching processing when stopping the tip, and draws at an upper portion thereof branch to be arc; The fallen leaves dormancy was removed and is drawn dendritic attitude in front 1 ~ 2 month, allowed tip angle naturally go up; Select 2 ~ 4 long tips during winter pruning and make skeleton branch, wipe out the secondary taper and divide as the cultivation of skeleton branch first paragraph, the clip bud stays bud, removes simultaneously the low branch of inserted part on the trunk, and the residue branch is made auxiliary support branch and cultivated;
B, second segment cultivate: Second Year, treat that the long tip of sprouting on the first paragraph skeleton branch approaches to do identical pinching with First Year when stopping the tip and draw a processing; The fallen leaves dormancy was removed and is drawn dendritic attitude in front 1 ~ 2 month, allowed tip angle naturally go up; Select 8 nearly horizontal stretchings, the basically identical long tip of growing way during winter pruning, extending head stays bud to wipe out the secondary taper to divide as the skeleton branch second segment and cultivate, 8 long tips selecting draw fixing by the spatial distribution of " rice " font in the horizontal direction, remove simultaneously the long tip of intersection, overlapping growth, remainder keeps the result and cultivates into large-scale fruit-bearing shoot cluster;
C, the 3rd section cultivation: the 3rd year, treat that the elongated shoot that sprouts on the second segment skeleton branch stops tip post-tensioning branch and is 45 °; Stay outer lateral bud to cut off the elongated shoot head portion during winter pruning, as the 3rd section cultivation of skeleton branch;
D, adopt the three sections general cultivations that can finish skeleton branch in 3 years of cultivation, uncompleted can continue to replenish according to identical method in the 4th year cultivate; Elongated shoot to skeleton branch when approaching the envelope row keeps continuously heavy cutting back of 20cm, Feng Hanghou appropriateness retraction.
4. the tree-like shaping methods of pear tree according to claim 3 " rice " font, it is characterized in that: after the tree body is shaped, skeleton branch first paragraph length 0.6 ~ 1.0m, its outer end terrain clearance 0.8 ~ 1.0m, skeleton branch second segment length 1.2 ~ 1.6m, its outer end terrain clearance 0.8 ~ 1.5m, skeleton branch the 3rd segment length 0.7 ~ 1.0m, its outer end terrain clearance 1.5 ~ 2.0m.
5. the tree-like shaping methods of pear tree according to claim 3 " rice " font is characterized in that: cultural method of its medium and small branch group is:
Beginning in the 3rd year keeps 15 ~ 20cm to the long shoot on the shaping skeleton branch during winter pruning and does the cutting back processing, and the young sprout that sprout at the cutting back place is done pinching and processed when surpassing 20cm, repetition pinching when the secondary tip length of sprouting surpasses 20cm;
In keeping during the next year winter pruning that second and third bud position, cutting back place sprouts, brachyplast stays stake to prune to form medium and small branch group, the control branch is organized spacing at 15 ~ 25cm.
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| CN106472234A (en) * | 2016-11-10 | 2017-03-08 | 金陵科技学院 | A kind of breeding method of the low dry radial pattern tree crown of hair |
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| CN109168884A (en) * | 2018-09-21 | 2019-01-11 | 湖州吴兴金农生态农业发展有限公司 | A kind of novel shed frame type high-quality pear cultural method |
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| CN115191259A (en) * | 2022-08-22 | 2022-10-18 | 华中农业大学 | Navel orange single-stem cylindrical high-light-efficiency tree form cultivation method |
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| CN106034777A (en) * | 2016-06-21 | 2016-10-26 | 北京景林园林绿化有限公司 | Plant shaping method |
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| CN106472234A (en) * | 2016-11-10 | 2017-03-08 | 金陵科技学院 | A kind of breeding method of the low dry radial pattern tree crown of hair |
| CN107646489A (en) * | 2017-11-07 | 2018-02-02 | 熊新家 | A kind of cultural method of pear tree |
| CN109168884A (en) * | 2018-09-21 | 2019-01-11 | 湖州吴兴金农生态农业发展有限公司 | A kind of novel shed frame type high-quality pear cultural method |
| CN110073888A (en) * | 2019-06-06 | 2019-08-02 | 福建省农业科学院果树研究所 | A kind of breeding method of morus laevigata shed frame type tree crown |
| CN115039617A (en) * | 2022-02-18 | 2022-09-13 | 宁夏农林科学院园艺研究所(宁夏设施农业工程技术研究中心) | Method for pruning cupped natural tree shapes of pear trees |
| CN115191259A (en) * | 2022-08-22 | 2022-10-18 | 华中农业大学 | Navel orange single-stem cylindrical high-light-efficiency tree form cultivation method |
| CN115191259B (en) * | 2022-08-22 | 2023-07-21 | 华中农业大学 | Navel orange single-dry cylinder high-light-efficiency tree form cultivation method |
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Application publication date: 20131016 |