Techniques of cutting and cutting seedlings in three-ridge furrows of Weeping willow
1. Choose seedlings
Nursery areas should be selected for flat terrain, good drainage, convenient irrigation, fertile soil and loose sandy loam and loam. Moreover, the former crop is the best for wheat, corn and beans, and it is not easy to select vegetable, melon and potato as well as perennial plots.
2. Soil fertigation
Site preparation time should be combined with nursery season. The autumn plug was carried out before the soil was frozen and plugged in after the soil was thawed, and the summer plug was performed 10-15 days before the plug. When you use a machine cultivator for the best soil preparation, you should plunge deeply. Apply 50 kg of calcium phosphate per acre, 25 kg of ammonium dihydrogen phosphate, and 15 kg of phoxim poison soil (1:10 ratio of drug to soil).
3. Three furrows covered film
Film mulching can increase the yield and quality of seedlings and increase the survival rate of seedlings. It has been proved by practice that the pattern of black wide film three furrows covering and rearing and rearing seedlings has superiority that other modes and methods cannot compare. When laminating the film, be sure to lay it tight and the Mulch Film should be in close contact with the ground.
4. Collection and cutting
(1) Collection of strips Collection strips are generally collected after defoliation of trees and before the sap flow in early spring, that is, when the trees are in dormant period, and the storage nutrients in the strips are sufficient.
(2) Scissor shearing Scissor cuttings should be carried out indoors and in the shed. When the ear cutting is performed, the unpadded and non-lignified part of the tip tissue is removed and the cuttings are cut from 12 cm to 18 cm in length. Willow cuttings may not consider leaving the buds, because the will of the willow branches are all over the body.
5. Cutting
(1) Cutting time: The spring, summer and autumn seasons of willow cuttings are all available, but the cuttings are mainly in autumn and spring in Tianshui area, and the cutting effect of mulching in late autumn is best. (2) Cutting density: The density of cuttings directly affects the yield and quality of seedlings. Production uses a wide-film 3 line cutting, that is, spacing 30 ~ 35cm, spacing 10 ~ 12cm.
(3) The cuttings should be inserted at an angle of 45°. Insert the soil southward and northward on the ridge cover membrane. Put the flat mouth upwards and the mouth obliquely into the soil. The upper cut shall expose the mulching film to 2 cm. At the same time, press the solid jack to make the cuttings. Closely integrated with the soil. Fill the water immediately after the cutting is completed to ensure the survival of the cuttings.
6. Cutting seedling management
(1) Irrigation and irrigation is one of the key measures for the survival of seedlings in the cutting of Weeping Willow. After the cuttings are cut, they should be irrigated with water immediately, and the membranes and cuttings should be inspected immediately. If there are holes, the holes should be filled with wet soil immediately to prevent walking, cuttings, draining and weed growth.
(2) Wiping budding seedlings After the cuttings of the golden silk weeping willows, the seed buds will sprout more quickly. It is necessary to wipe out the seedlings in a timely manner. When the seedlings are set, they shall retain their superiority and inferiority, and retain a strong bud.
(3) In addition to applying a large number of basal fertilizers before nursery, fertilizers and insecticides are also topdressed 2 or 3 times. There are fewer pests and diseases in the weeping willow, mainly leaf aphids and aphids, which can be combined with 0.3% potassium dihydrogen phosphate + 1000 times aqua-phosphorphosphos- phorus control after spraying in July.
(4) Weeding pruning film cutting seedlings need not loose soil, but we must promptly clean the weeds between seedlings and membranes. While weeding, we must remove axillary buds in time to promote the healthy growth of seedlings.
7. Precautions
(1) The cutting should be properly preserved after shearing and must not be mildewed.
(2) When the mulching film is inserted, it must be perforated and then cut to prevent the lower cut from being affected by the mulching. It is even more difficult to cut the cuttings without cutting them.
(3) The chemical fertilizer applied to the hole must not be too close to the root of the seedling to avoid burning out the seedlings.
(4) Cuttage seedlings should be rejuvenated in the second year. The willow roots developed in this way are well developed, and the survival rate of afforestation is high.
(5) The daily management found that the plastic film was damaged and repaired in time to prevent weeds from breeding.
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