A method for controlling the shoots and promoting flowering of litchi

Abstract

The invention discloses a method for controlling the shoots and promoting the flowering of litchi, the method comprising: pruning after fruit picking in July, applying compound fertilizer and urea to promote the growth of the first autumn shoots; applying compound fertilizer in early to mid-September after the first autumn shoots mature, promoting the growth of the second autumn shoots; applying urea and watering in mid-to-late November to promote the growth of the third autumn shoots; killing the shoots when the third autumn shoots grow to 10 to 15 cm; ringing the main branches in mid-to-late December; spraying the leaves with potassium dihydrogen phosphate and ammonium ethyl acetate in mid-to-late January, and ringing again at the position of the previous ringing. The method provided by the invention can reasonably control the number of autumn shoots of litchi, increase the amount of flowering, improve the yield of litchi, effectively increase production and increase income, and has a wide range of application prospects.

Description

Technical Field

[0001] The invention relates to the field of fruit tree planting, and in particular to a method for controlling the shoots and promoting flowering of litchi. Background Art

[0002] Litchi (Litchi chinensis Sonn.) is a famous specialty fruit tree in southern my country, and its yield is easily affected by environmental temperature and climate. Autumn shoots are the main fruiting mother branches of litchi. The number, quantity, and quality of autumn shoots determine the yield of litchi, and the number of shoots is the most difficult to control. The number of autumn shoots directly affects the number of winter shoots and the accumulation of nutrients in the last shoots, which in turn affects flowering and fruiting. In production, improper control or poor cultivation of autumn shoots often leads to a reduction in litchi yield.

[0003] The growth of autumn shoots of litchi trees of different ages is different. Young litchi fruiting trees grow vigorously, and the time required for autumn shoots to mature is shorter than that of adult litchi trees, so young litchi fruiting trees can produce 2 to 3 autumn shoots after harvesting. Adult litchi fruiting trees produce 1 to 2 autumn shoots each year, and the last autumn shoot matures early and is prone to sprouting winter shoots, resulting in a significant decrease in yield. Litchi grows slowly and has high cultivation costs, so it is necessary to achieve high quality and high yield to improve economic benefits. Summary of the invention

[0004] The purpose of the invention is to improve the economic benefits of litchi and achieve high quality and high yield, and to provide a method for controlling the shoots and promoting the flowering of litchi.

[0005] Another object of the present invention is to provide application of the above method in increasing litchi yield.

[0006] In order to achieve the above object, the present invention is implemented by the following scheme:

[0007] A method for controlling the growth of litchi branches and promoting flowering, comprising the following steps:

[0008] S1. After harvesting in July, prune and fertilize to promote the first autumn shoot growth;

[0009] S2. In early to mid-September, after the first autumn shoots mature, apply fertilizer to promote the growth of the second autumn shoots;

[0010] S3. In mid-to-late November, apply fertilizer and water to promote the third autumn shoot growth;

[0011] S4. When the third autumn shoots grow to 10-15 cm, kill them;

[0012] S5. In mid-to-late December, ring the main branches once, just reaching the wood.

[0013] S6. In mid-to-late January, apply fertilizer; at the position of the ringing in step S5, close the ring again for one circle, the depth just reaches the wood part, and the width does not exceed the width of the ringing in step S5.

[0014] Preferably, in step S1, the pruning method is one or more of retraction pruning, short pruning or thinning pruning.

[0015] More preferably, in step S1, the trimming method is retraction trimming.

[0016] Preferably, in step S1, the fertilization is based on 50 kg of fruit-bearing trees, with 1.5-2.5 kg of compound fertilizer and 0.5-1.0 kg of urea applied per tree.

[0017] More preferably, in step S1, the fertilization is based on 50 kg of fruit-bearing trees, with 1.5 kg of compound fertilizer and 0.5 kg of urea applied per tree.

[0018] Preferably, in step S2, the fertilization is performed by applying 0.5-1.5 kg of compound fertilizer per tree based on 50 kg of fruit bearing trees.

[0019] More preferably, in step S2, the fertilization is performed by applying 0.5 kg of compound fertilizer per tree based on 50 kg of fruit bearing trees.

[0020] Preferably, step S1 and / or step S2 further comprises killing insects and protecting the new shoots of the first autumn shoots and / or the new shoots of the second autumn shoots when they have grown 1 to 2 cm.

[0021] More preferably, in step S1 and / or step S2, the method of killing insects and protecting shoots is spraying.

[0022] Furthermore, in step S1 and / or step S2, the spraying is spraying the whole garden with high-efficiency cypermethrin and / or dichlorvos.

[0023] Preferably, in step S3, the fertilization is performed by applying 100-200 g of urea per tree based on 50 kg of fruit bearing trees.

[0024] More preferably, in step S3, the fertilization is performed by applying 100 g of urea per tree based on 50 kg of fruit bearing trees.

[0025] Preferably, in step S3, the amount of water used for watering is 50-100 kg / plant.

[0026] More preferably, in step S3, the amount of water used for watering is 80 kg / plant.

[0027] Preferably, in step S4, in early to mid-December, when the third autumn shoots grow to 10 to 15 cm, the shoots are killed.

[0028] Preferably, in step S4, the method of killing the shoots is to spray the tree crowns with 8000 to 15000 times the concentration of 240 g / L oxyfluorfen to kill the leaves on the third autumn shoots.

[0029] More preferably, in step S4, the method of killing the shoots is to spray the tree crown with 10,000 times the concentration of 240 g / L oxyfluorfen.

[0030] Preferably, in step S5, the main branch is the main branch where the first autumn shoot is located.

[0031] Preferably, in step S5, the width of the ring stripping is 1.5 to 2.0 mm.

[0032] Preferably, in step S6, the fertilizing is spraying foliar fertilizer.

[0033] More preferably, in step S6, the foliar fertilizer is potassium dihydrogen phosphate and ammonium ethyl hexanoate.

[0034] More preferably, in step S6, the foliar fertilizer is 500 to 800 times of potassium dihydrogen phosphate and 1500 to 2500 times of 5% ammonium ethyl hexanoate in mass concentration.

[0035] Furthermore, in step S6, the foliar fertilizer is 500 times of potassium dihydrogen phosphate and 2000 times of 5% ammonium ethyl hexanoate in mass concentration.

[0036] The application of the above method in increasing litchi yield should also be within the protection scope of the present invention.

[0037] Preferably, the lychees are Guiwei and / or Nuomici.

[0038] More preferably, the lychee has a cinnamon flavor.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] By utilizing the method provided by the present invention, the number of times of autumn shoots of litchi can be reasonably controlled, the number of fruits set can be increased, the yield of litchi can be improved, and the increase in production and income can be effectively achieved, thus having broad application prospects. DETAILED DESCRIPTION

[0041] The present invention is further described in detail below in conjunction with specific examples, which are only used to explain the present invention and are not used to limit the scope of the present invention. The test methods used in the following examples are conventional methods unless otherwise specified; the materials, reagents, etc. used are reagents and materials that can be obtained from commercial channels unless otherwise specified.

[0042] Embodiment 1 A method for controlling the shoots and promoting flowering of litchi

[0043] 1. Autumn shoot cultivation:

[0044] After the lychees are harvested in July, they are pruned back and, based on a tree bearing 50kg of fruit, 1.5kg of compound fertilizer and 0.5kg of urea are applied to each tree to promote the first autumn shoot growth.

[0045] In early to mid-September, after the first autumn shoots mature, apply 0.5 kg of compound fertilizer per plant, assuming that the tree bears 50 kg of fruit, to promote the growth of the second autumn shoots. When the new shoots of the first autumn shoots and the new shoots of the second autumn shoots grow 1 to 2 cm tall, spray the entire garden with highly effective cypermethrin and dichlorvos to kill insects and protect the shoots.

[0046] In mid-to-late November, after the second autumn shoots mature, apply 100g of urea per plant, and then water 50kg / plant to promote the growth of the third autumn shoots.

[0047] 2. Kill the shoots

[0048] When the third autumn shoots grow to 10-15 cm, around early to mid-December, spray the tree crown with 10,000 times the concentration of 240g / L oxyfluorfen to kill the leaves on the third autumn shoots.

[0049] 3. Control tip:

[0050] In mid-to-late December, ring barking is carried out. On the main branch where the first autumn shoots are located, use a ring barking knife to make a closed ring bark in one circle, the depth just reaching the wood, removing the bark without damaging the wood, the width is 1.5 to 2.0 mm.

[0051] 4. Promote flowers:

[0052] In mid to late January, spray the leaves with 500 times potassium dihydrogen phosphate + 2000 times 5% ammonium ethyl ester by mass concentration; then, use a saw to saw one circle (ringing) on ​​the previous ringing mouth, the depth just reaching the wood, removing the bark without damaging the wood, the width is 1.5 to 2.0 mm.

[0053] Embodiment 2 A method for controlling the shoots and promoting flowering of litchi

[0054] 1. Autumn shoot cultivation:

[0055] After the lychees are harvested in July, they are pruned back and, based on a tree bearing 50kg of fruit, 2.0kg of compound fertilizer and 0.8kg of urea are applied to each tree to promote the first autumn shoot growth.

[0056] In early to mid-September, after the first autumn shoots mature, apply 1.0 kg of compound fertilizer per tree, assuming that the tree bears 50 kg of fruit, to promote the growth of the second autumn shoots. When the new shoots of the first autumn shoots and the new shoots of the second autumn shoots grow 1 to 2 cm tall, spray the entire garden with highly effective cypermethrin and dichlorvos to kill insects and protect the shoots.

[0057] In mid-to-late November, after the second autumn shoots mature, apply 150g of urea per plant, and then water 80kg / plant to promote the growth of the third autumn shoots.

[0058] 2. Kill the shoots

[0059] When the third autumn shoots grow to 10-15 cm, around early to mid-December, spray the tree crown with 15,000 times the concentration of 240g / L oxyfluorfen to kill the leaves on the third autumn shoots.

[0060] 3. Control tip:

[0061] In mid-to-late December, ring barking is carried out. On the main branch where the first autumn shoots are located, use a ring barking knife to make a closed ring bark in one circle, the depth just reaching the wood, removing the bark without damaging the wood, the width is 1.5 to 2.0 mm.

[0062] 4. Promote flowers:

[0063] In mid to late January, spray the leaves with 700 times potassium dihydrogen phosphate + 2000 times 5% ammonium ethyl ester by mass concentration; then, use a saw to saw one circle (ringing) on ​​the previous ringing mouth, the depth just reaching the wood, removing the bark without damaging the wood, the width is 1.5 to 2.0 mm.

[0064] Embodiment 3 A method for controlling the shoots and promoting flowering of litchi

[0065] 1. Autumn shoot cultivation:

[0066] After the lychees are harvested in July, they are pruned back and, based on a tree bearing 50kg of fruit, 2.5kg of compound fertilizer and 1.0kg of urea are applied to each tree to promote the first autumn shoot growth.

[0067] In early to mid-September, after the first autumn shoots mature, apply 1.5 kg of compound fertilizer per tree, assuming that the tree bears 50 kg of fruit, to promote the growth of the second autumn shoots. When the new shoots of the first autumn shoots and the second autumn shoots grow 1 to 2 cm tall, spray the entire garden with highly effective cypermethrin and dichlorvos to kill insects and protect the shoots.

[0068] In mid-to-late November, after the second autumn shoots mature, apply 200g of urea per plant, and then water 100kg / plant to promote the growth of the third autumn shoots.

[0069] 2. Kill the shoots

[0070] When the third autumn shoots grow to 10-15 cm, around early to mid-December, spray the tree crown with 8000 times the concentration of 240g / L oxyfluorfen to kill the leaves on the third autumn shoots.

[0071] 3. Control tip:

[0072] In mid-to-late December, ring barking is carried out. On the main branch where the first autumn shoots are located, use a ring barking knife to make a closed ring bark in one circle, the depth just reaching the wood, removing the bark without damaging the wood, the width is 1.5 to 2.0 mm.

[0073] 4. Promote flowers:

[0074] In mid-to-late January, spray the leaves with 800 times potassium dihydrogen phosphate + 2000 times 5% ammonium ethyl ester by mass concentration; then, use a saw to saw one circle (ringing) on ​​the previous ringing mouth, the depth just reaching the xylem, removing the bark without damaging the wood, the width is 1.5 to 2.0 mm.

[0075] Comparative Example 1 A method for controlling the tip of litchi

[0076] After the lychees are harvested in July, they are pruned back and, based on a tree bearing 50kg of fruit, 1.5kg of compound fertilizer and 0.5kg of urea are applied to each tree to promote the first autumn shoot growth.

[0077] In early to mid-September, after the first autumn shoots mature, apply 0.5 kg of compound fertilizer per plant, assuming that the tree bears 50 kg of fruit, to promote the growth of the second autumn shoots. When the new shoots of the first autumn shoots and the new shoots of the second autumn shoots grow 1 to 2 cm tall, spray the entire garden with highly effective cypermethrin and dichlorvos to kill insects and protect the shoots.

[0078] Comparative Example 2 A method for controlling the tip of litchi

[0079] 1. Autumn shoot cultivation:

[0080] After the lychees are harvested in July, they are pruned back and, based on a tree bearing 50kg of fruit, 1.5kg of compound fertilizer and 0.5kg of urea are applied to each tree to promote the first autumn shoot growth.

[0081] In early to mid-September, after the first autumn shoots mature, apply 0.5 kg of compound fertilizer per plant, assuming that the tree bears 50 kg of fruit, to promote the growth of the second autumn shoots. When the new shoots of the first autumn shoots and the new shoots of the second autumn shoots grow 1 to 2 cm tall, spray the entire garden with highly effective cypermethrin and dichlorvos to kill insects and protect the shoots.

[0082] In mid-to-late November, after the second autumn shoots mature, apply 100g of urea per plant, and then water 50kg / plant to promote the growth of the third autumn shoots.

[0083] 2. Kill the shoots

[0084] When the third autumn shoots grow to 10-15 cm, around early to mid-December, spray the tree crown with 10,000 times the concentration of 240g / L oxyfluorfen to kill the leaves on the third autumn shoots.

[0085] Comparative Example 3 A method for controlling the tip of litchi

[0086] After the lychees are harvested in July, they are pruned back and, based on a tree bearing 50kg of fruit, 1.5kg of compound fertilizer and 0.5kg of urea are applied to each tree to promote the first autumn shoot growth.

[0087] In early to mid-September, after the first autumn shoots mature, apply 0.5 kg of compound fertilizer per plant, assuming that the tree bears 50 kg of fruit, to promote the growth of the second autumn shoots. When the new shoots of the first autumn shoots and the new shoots of the second autumn shoots grow 1 to 2 cm tall, spray the entire garden with highly effective cypermethrin and dichlorvos to kill insects and protect the shoots.

[0088] In mid-to-late November, after the second autumn shoots mature, apply 100g of urea per plant, and then water 50kg / plant to promote the growth of the third autumn shoots.

[0089] Comparative Example 4: A method for controlling the shoots and promoting flowering of litchi

[0090] 1. Autumn shoot cultivation:

[0091] After the lychees are harvested in July, they are pruned back and, based on a tree bearing 50kg of fruit, 1.5kg of compound fertilizer and 0.5kg of urea are applied to each tree to promote the first autumn shoot growth.

[0092] In early to mid-September, after the first autumn shoots mature, apply 0.5 kg of compound fertilizer per plant, assuming that the tree bears 50 kg of fruit, to promote the growth of the second autumn shoots. When the new shoots of the first autumn shoots and the new shoots of the second autumn shoots grow 1 to 2 cm tall, spray the entire garden with highly effective cypermethrin and dichlorvos to kill insects and protect the shoots.

[0093] In mid-to-late November, after the second autumn shoots mature, apply 100g of urea per plant, and then water 50kg / plant to promote the growth of the third autumn shoots.

[0094] 2. Promote flowers:

[0095] In mid-to-late January, 500 times potassium dihydrogen phosphate + 2000 times 5% aminoethyl hexanoate were sprayed on the leaves.

[0096] 1. Autumn shoot cultivation:

[0097] After the lychees are harvested in July, they are pruned back and, based on a tree bearing 50kg of fruit, 1.5kg of compound fertilizer and 0.5kg of urea are applied to each tree to promote the first autumn shoot growth.

[0098] In early to mid-September, after the first autumn shoots mature, apply 0.5 kg of compound fertilizer per plant, assuming that the tree bears 50 kg of fruit, to promote the growth of the second autumn shoots. When the new shoots of the first autumn shoots and the new shoots of the second autumn shoots grow 1 to 2 cm tall, spray the entire garden with highly effective cypermethrin and dichlorvos to kill insects and protect the shoots.

[0099] In mid-to-late November, after the second autumn shoots mature, apply 100g of urea per plant, and then water 50kg / plant to promote the growth of the third autumn shoots.

[0100] 2. Control tip:

[0101] In mid-to-late December, ring barking is carried out. On the main branch where the first autumn shoots are located, use a ring barking knife to make a closed ring bark in one circle, the depth just reaching the wood, removing the bark without damaging the wood, the width is 1.5 to 2.0 mm.

[0102] 3. Promote flowers:

[0103] In mid-to-late January, 500 times potassium dihydrogen phosphate + 2000 times 5% aminoethyl hexanoate were sprayed on the leaves.

[0104] 1. Autumn shoot cultivation:

[0105] After the lychees are harvested in July, they are pruned back and, based on a tree bearing 50kg of fruit, 1.5kg of compound fertilizer and 0.5kg of urea are applied to each tree to promote the first autumn shoot growth.

[0106] In early to mid-September, after the first autumn shoots mature, apply 0.5 kg of compound fertilizer per plant, assuming that the tree bears 50 kg of fruit, to promote the growth of the second autumn shoots. When the new shoots of the first autumn shoots and the new shoots of the second autumn shoots grow 1 to 2 cm tall, spray the entire garden with highly effective cypermethrin and dichlorvos to kill insects and protect the shoots.

[0107] In mid-to-late November, after the second autumn shoots mature, apply 100g of urea per plant, and then water 50kg / plant to promote the growth of the third autumn shoots.

[0108] 2. Control tip:

[0109] In mid-to-late December, ring barking is carried out. On the main branch where the first autumn shoots are located, use a ring barking knife to make a closed ring bark in one circle, the depth just reaching the wood, removing the bark without damaging the wood, the width is 1.5 to 2.0 mm.

[0110] 3. Promote flowers:

[0111] In mid to late January, spray the leaves with 500 times potassium dihydrogen phosphate + 2000 times 5% ammonium ethyl ester by mass concentration; then, use a saw to saw one circle (ringing) on ​​the previous ringing mouth, the depth just reaching the wood, removing the bark without damaging the wood, the width is 1.5 to 2.0 mm.

[0112] Comparative Example 7 A method for controlling the shoots and promoting flowering of litchi

[0113] 1. Autumn shoot cultivation:

[0114] After the lychees are harvested in July, they are pruned back and, based on a tree bearing 50kg of fruit, 1.5kg of compound fertilizer and 0.5kg of urea are applied to each tree to promote the first autumn shoot growth.

[0115] In early to mid-September, after the first autumn shoots mature, apply 0.5 kg of compound fertilizer per plant, assuming that the tree bears 50 kg of fruit, to promote the growth of the second autumn shoots. When the new shoots of the first autumn shoots and the new shoots of the second autumn shoots grow 1 to 2 cm tall, spray the entire garden with highly effective cypermethrin and dichlorvos to kill insects and protect the shoots.

[0116] In mid-to-late November, after the second autumn shoots mature, apply 100g of urea per plant, and then water 50kg / plant to promote the growth of the third autumn shoots.

[0117] 2. Kill the shoots

[0118] When the third autumn shoots grow to 4-8 cm, spray the tree crown with 10,000 times the concentration of 240g / L oxyfluorfen to kill the leaves on the third autumn shoots.

[0119] 3. Control tip:

[0120] In mid-to-late December, ring barking is carried out. On the main branch where the first autumn shoots are located, use a ring barking knife to make a closed ring bark in one circle, the depth just reaching the wood, removing the bark without damaging the wood, the width is 1.5 to 2.0 mm.

[0121] 4. Promote flowers:

[0122] In mid to late January, spray the leaves with 500 times potassium dihydrogen phosphate + 2000 times 5% ammonium ethyl ester by mass concentration; then, use a saw to saw one circle (ringing) on ​​the previous ringing mouth, the depth just reaching the wood, removing the bark without damaging the wood, the width is 1.5 to 2.0 mm.

[0123] Comparative Example 8: A method for controlling the shoots and promoting flowering of litchi

[0124] 1. Autumn shoot cultivation:

[0125] After the lychees are harvested in July, they are pruned back and, based on a tree bearing 50kg of fruit, 1.5kg of compound fertilizer and 0.5kg of urea are applied to each tree to promote the first autumn shoot growth.

[0126] In early to mid-September, after the first autumn shoots mature, apply 0.5 kg of compound fertilizer per plant, assuming that the tree bears 50 kg of fruit, to promote the growth of the second autumn shoots. When the new shoots of the first autumn shoots and the new shoots of the second autumn shoots grow 1 to 2 cm tall, spray the entire garden with highly effective cypermethrin and dichlorvos to kill insects and protect the shoots.

[0127] In mid-to-late November, after the second autumn shoots mature, apply 100g of urea per plant, and then water 50kg / plant to promote the growth of the third autumn shoots.

[0128] 2. Kill the shoots

[0129] When the third autumn shoots grow to 20-25 cm, spray the tree crown with 10,000 times the concentration of 240g / L oxyfluorfen to kill the leaves on the third autumn shoots.

[0130] 3. Control tip:

[0131] In mid-to-late December, ring barking is carried out. On the main branch where the first autumn shoots are located, use a ring barking knife to make a closed ring bark in one circle, the depth just reaching the wood, removing the bark without damaging the wood, the width is 1.5 to 2.0 mm.

[0132] 4. Promote flowers:

[0133] In mid to late January, spray the leaves with 500 times potassium dihydrogen phosphate + 2000 times 5% ammonium ethyl ester by mass concentration; then, use a saw to saw one circle (ringing) on ​​the previous ringing mouth, the depth just reaching the wood, removing the bark without damaging the wood, the width is 1.5 to 2.0 mm.

[0134] Comparative Example 9: A method for controlling the shoots and promoting flowering of litchi

[0135] 1. Autumn shoot cultivation:

[0136] After the lychees are harvested in July, they are pruned back and, based on a tree bearing 50kg of fruit, 1.5kg of compound fertilizer and 0.5kg of urea are applied to each tree to promote the first autumn shoot growth.

[0137] In early to mid-September, after the first autumn shoots mature, apply 0.5 kg of compound fertilizer per plant, assuming that the tree bears 50 kg of fruit, to promote the growth of the second autumn shoots. When the new shoots of the first autumn shoots and the new shoots of the second autumn shoots grow 1 to 2 cm tall, spray the entire garden with highly effective cypermethrin and dichlorvos to kill insects and protect the shoots.

[0138] 2. Control tip:

[0139] After the second autumn shoots mature, ring barking is carried out. On the main branch where the first autumn shoots are located, use a ring barking knife to ring bark in a closed circle, the depth just reaching the wood, removing the bark without damaging the wood, the width is 1.5 to 2.0 mm.

[0140] Application Example 1

[0141] Select Guiwei lychee trees with consistent growth, about 20 years old. Treat according to the methods of Examples 1 to 3 and Comparative Examples 1 to 9, 3 trees for each treatment. In early March of the following year, count the number of flowering branches and fruiting mother branches of 8 fruiting branch groups in the east, south, west and north directions of the central outer crown, and calculate the flowering branch rate according to the formula: flowering branch rate = number of flowering branches ÷ number of fruiting mother branches × 100%.

[0142] Table 1 Growth of litchi in early March of the following year

[0143]

[0144] The statistical results are shown in Table 1, indicating that the third shoot release in mid-to-late November and the shoot killing treatment can improve the flowering rate of Guiwei litchi. If the foliar fertilizer is sprayed + ring cutting treatment in mid-January, the effect is better, and the flowering branch rate reaches more than 60%. The traditional method of releasing autumn shoots twice and then ring cutting to control shoots and promote flowering treatment has a flowering rate of only 50%. Fertilization and pruning after harvesting promote the growth of autumn shoots. The third shoot release in mid-November, the shoot killing treatment is carried out when the new shoot grows to 10-15cm, the ring stripping treatment is carried out in mid-to-late December, and the leaves are sprayed with 500 times potassium dihydrogen phosphate + 2000 times of mass concentration of 5% aminoethyl hexanoate in mid-to-late January; then, a circle is sawed on the previous ring stripping mouth (ring stripping), and the flowering rate of Guiwei litchi is the best, reaching 86.92%.

[0145] Application Example 2

[0146] Select Guiwei lychee trees with consistent growth, about 20 years old. Treat according to the methods of Examples 1 to 3 and Comparative Examples 1 to 9, 3 trees in each treatment, and randomly select 10 branches from each tree for hanging. Record the number of fruits in each ear after the first physiological fruit drop, and calculate the fruit setting rate. When the fruit is ripe, count the yield.

[0147] Table 2 Litchi fruit number and yield

[0148]

[0149] The statistical results are shown in Table 2, indicating that the third shoot release in mid-to-late November and the shoot killing treatment can increase the initial fruit number and yield of Guiwei litchi. If the foliar fertilizer is sprayed + ring cutting treatment in mid-January, the effect is better, the initial fruit number reaches more than 18, and the plant yield reaches more than 35kg. The traditional release of autumn shoots twice, followed by ring cutting to control shoots and promote flowering, the initial fruit number is 15, and the plant yield is only more than 26.67kg. Fertilization and pruning after harvest promote the growth of autumn shoots. The third shoot release in mid-November, the shoot killing treatment is carried out when the new shoot grows to 10-15cm, the ring stripping treatment is carried out in mid-to-late December, and the leaf spraying is carried out in mid-to-late January. Then, the sawing of 1 circle (ring stripping) on ​​the previous ring stripping mouth has the best effect, the initial fruit number reaches 26.3, and the plant yield reaches 48.67kg.

[0150] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the protection scope of the present invention. For ordinary technicians in this field, other different forms of changes or modifications can be made based on the above descriptions and ideas. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A method for controlling the growth of litchi branches and promoting flowering, characterized in that: The following steps are involved: S1. After harvesting in July, prune and fertilize to promote the first autumn shoot growth; S2. In early to mid-September, after the first autumn shoots mature, apply fertilizer to promote the growth of the second autumn shoots; S3. In mid-to-late November, fertilize and water to promote the third autumn shoot growth; the fertilization is based on 50 kg of fruit-bearing trees, and 100-200g of urea is applied per plant; the water dosage for watering is 50-100kg / plant; S4. When the third autumn shoots grow to 10 to 15 cm, the shoots are killed; the method of killing the shoots is to spray the crown with 240g / L oxyfluorfen 8000 to 15000 times the concentration to kill the leaves on the third autumn shoots; S5. In mid-to-late December, ring the main branches once, just reaching the wood. S6. In mid-to-late January, apply foliar fertilizer; at the position of the ringing in step S5, ring the plant again in a closed circle, with a depth just reaching the xylem and a width not exceeding the width of the ringing in step S5; the foliar fertilizer is 500-800 times of potassium dihydrogen phosphate and 1500-2500 times of the mass concentration of 5% ammonium hexanoate.

2. The method according to claim 1, characterized in that: In step S1, the fertilization is based on 50 kg of fruit-bearing trees, with 1.5-2.5 kg of compound fertilizer and 0.5-1.0 kg of urea applied to each tree.

3. The method according to claim 1, characterized in that In step S2, the fertilization is based on 50 kg of fruit-bearing trees, with 0.5-1.5 kg of compound fertilizer applied to each tree.

4. The method according to claim 1, characterized in that: Step S1 and / or step S2 also includes killing insects and protecting the new shoots of the first autumn shoots and / or the new shoots of the second autumn shoots when they have grown 1 to 2 cm.

5. Use of the method according to any one of claims 1 to 4 in increasing litchi yield.

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