First, grafting
Chestnut is not normally grafted in the nursery, but is planted more than two centimeters after the colonization.
1, scion collection and storage
Harvested in the second half of March, the thick, disease-free shoots were collected on the elite trees, 0.5 cm thick. Bundle, hang tags, pack plastic bags. Storage temperature in the cellar does not exceed 13 degrees, storage time does not exceed 50 days, too long, the survival rate is reduced. Scion amount or need to early harvest, should be wax sealed storage.
2. Grafting starts in mid-April (temperature above 15 degrees).
3, grafting method:
(1) insert the skin. Scions are 7 to 10 cm long, 3 to 5 full shoots, cut into horseshoe shapes, noodles longer than 2 Cm, and the opposite side is cut into small horseshoe shapes and 0.3 to 0.5 cm long. The saplings are cut at a height of 20 cm and the main poles are cut. If they are high, they are cut off at the appropriate locations. Open a 1-2 cm vertical knife edge on the smooth side of the wood, and then insert the sharpened scion, slightly white. It is then tied tightly with plastic strips.
Note that: A, scion should not be too thick, 0.2 ~ 0.5 cm is appropriate. If it is too thick, it should be cut more.
B. When the veneer is thick, it should be thinned for binding.
There are also methods that tie first and then plug in, which works well. That is, after cutting off the wood, it is wrapped and tied tightly with two layers of plastic film. Then, the sharpened cuttings are inserted through the plastic film between the xylem and the phloem.
(2) Abdominal connection. Without cutting off the incision, cut the incision in the appropriate part of the wood, the angle of 30 ~ 450, as above, insert the cuttings, at least one side to form a layer opposite. Tied up can be.
(3) connection. Cut off the wood, cut a knife with a vertical cross-section, cut both sides of the scion into a horseshoe shape, insert the cuttings, and form a layer on at least one side. If the wood is coarse, insert another scion on the other side of the incision to align the layers on one side. Tied up can be. This method is used for grafting when sap is not flowing.
Second, pruning and rejuvenation
1, shaping. Form a good skeleton; improve light; focus on nutrients, high yield and stable production. As a result, the retention of the mother shoots is preferably 8 to 12 sticks per square meter. The principle is that the conditions for the site are better and the conditions are poor.
2, trim. 1 naturally happy-shaped, dry height 60 to 100 cm, leaving 2 to 3 main branches, leaving about 2 per main branch? 戎Α J 鞲呖刂 ?? meters. 2 trunk skeleton sparse, dry height 80 to 100 cm, leaving 4 to 5 main branches, points 2 to 3 layers, spacing 75 to 120 cm, leaving 2 to 3 per main branch? (18) æ° 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 (11)娓 隆 隆 苤 苤 苤 苤 苤 ? ? ? ? ? ? ç ç ç ç ç ç ç . .
3, Shuxiong. The female mixes inflorescence when it blooms. At this time, the lower male inflorescence is 4 to 7 cm long. Manually remove 90% to 95% of the male inflorescence. Note: The male inflorescence on a branch must be clean.
Third, fertilize and water
After the fruit is harvested, the basal fertilizer is generally used, mainly farmyard manure, and green manure can also be applied. Fertilizer with nitrogen fertilizer or compound fertilizer, 2 to 3 times a year, the total amount of 0.5 to 2.0 kg per plant, can also spray fertilizer foliar, the concentration of 0.3% to 0.5%.
Watering in time when the soil is dry. It usually waters before germination, before the rainy season, and after fertilization.
IV. Pest Control
1. Starscream: There are more than 50 insects in most of the leaves. It is necessary to promptly use scorpion grams or grams of salt to get rid of thirst.
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