Covering cultivation with mulching film can make sesame per mu more than 150 kg, and some can exceed 200 kg. Therefore, mulching is an effective cultivation measure to achieve super high yield of sesame. The specific technology is introduced as follows:
1. Seed selection and early sowing: After the mulching film is covered, the effective growth period of sesame is prolonged. Therefore, it is advisable to use medium-late ripe sesame varieties with high tolerance to cockroaches, disease resistance and high yield, such as Yuzhi No.5, No.7, No.8 and sesame hybrids, suitable for early sowing, and the sowing date is from the end of April to the beginning of May. Use the growing season to increase sesame production.
2, soil preparation fertilization ridge: increase the application of phosphorus and potassium fertilizer, control the amount of nitrogen fertilizer. When the yield of sesame seeds is more than 200 kilograms, about 20 kilograms of nitrogen, phosphorus and potassium are applied. In the fertilization method, the base fertilizer is mainly used, supplemented by flower topdressing and foliar topdressing. Half of the total phosphorus and potassium fertilizer and total nitrogen were used as the base fertilizer, and the remaining half of the nitrogen fertilizer was used as the top dressing. The mulch must be ridged, usually one ridge every 80 cm, the ridge surface is 45 cm wide, the groove width is 35 cm, and the ridge height is about 10 cm. 2 rows per ridge, with an average row spacing of 40 cm.
3, sowing and film: the film sesame can be used for stripping, generally can be sown after the cover film, the width of the film is 70 cm, in order to reduce the production cost, generally use linear low-density polyethylene micro-film (local film thickness is At 0.008 mm, about 6.5 kg of mulch is required per mu. The film can be mechanically or manually carried out, but the ridge surface must be flat, the film and the soil surface are firm, the film is sealed, and the soil cover is applied to all the holes. In addition, the pre-emergence soil treatment herbicide is sprayed before the film is mulched to prevent weeds.
4, chemical regulation: before sowing with 100 mg / kg -150 mg / dry grams (ppm) with dip soaking seeds or spray 150 mg / kg (ppm) in the seedling stage, promote root shoots.
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Orthopedic external fixation system
The screw orthopedic is inserted into the bone near the fracture, and the fracture is fixed with an external fixator assembled by a chuck and a nail rod.
Indications
open fracture, nonunion, closed fracture with extensive soft tissue injury, fracture with multiple trauma, osteotomy and correction.
The use of orthopaedic external fixators is currently a superior fracture fixation technique, filling the gap between cast and internal fixation. At the same time, orthopedic external fixator has the characteristics of simple fixation method, stable, reliable and effective, and does not limit the joint movement, can be early ambulation advantages. It can reduce the time for the operator and is more friendly to the user. The external fixator was used together with the bone traction needle. In terms of the classification of orthopedic external fixators, it is mainly divided into four types: orthofix type external fixation, ilizarov type external fixation, ao synthes type external fixation,combined external fixator and common external fixators.
The external fixators in orthopaedics was used for reduction (shortening and overlapping displacement were corrected first, then lateral and angular displacement were corrected, and finally rotational and separation displacement were corrected; If closed reduction is difficult, open reduction can be considered, but the separation of soft tissue and peeling of periosteum should be minimized.
The selection of the insertion site.According to the anatomical characteristics of the soft tissue at the insertion plane, the important nerves, vessels and tendons should be avoided; The ideal entry point is the part of the bone close to the subcutaneous, in a word, generally choose the skin and bone between the muscle soft tissue is the weakest point into the needle. The installation shall facilitate observation and control of soft tissue damage, and permit any surgery that may be required, such as repair and reconstruction, dressing change, skin grafting, or bone grafting." According to the location of the bone, different diameters of the threaded needle were selected. Removal was performed after completion of late treatment.
Orthopedic External Fixator,Orthopedic Fixator,External Fixation,External Fixator
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