Jujube trees have a low rate of fruit set, and poor management is prone to flowering and less results. Jujube germination is late, and flowering and fruit setting are concentrated in summer. Therefore, if you want to obtain high yield and stable yield, you must scientifically manage it according to the biological characteristics of jujube trees in summer. Based on the experience summarized in the production, the technical points are now introduced as follows.
1. Pruning: Entering the peak of jujube growth in mid-June, the pruning does not stimulate the main bud to germinate. Through pruning, it can adjust the distribution of nutrients, reduce the drop and fruit, and promote fruit development.
Shuzhi: In the spring and summer seasons, the jujubes are germinated on the jujube, and the long branches of the jujube roots. If there is no use value, the base should be removed when the branches are not lignified to concentrate nutrients and promote fruit set.
Topping: The main bud grows quickly after the date of jujube. If you want to use it for shaping, it will be short-cut at 1/3 of the length of jujube in mid-June, and control its length to concentrate nutrition, improve fruit set rate and improve fruit. quality.
2, flowering hormone: spray 5-10 mg / L 2,4-D solution at the beginning of the flower, with 0.3% borax in the flowering period to increase the germination rate of pollen. After spraying, the fruit setting rate of jujube trees can be significantly improved.
3, fertilizer management: jujube germination, leaf expansion and flowering to consume a lot of nutrients, so in mid-May, urea should be applied to supplement the growth of foliage and ammonia, 500-year-old tree per plant about 500 grams. August is the fruit expansion period, so in the beginning of August, I will catch another fat. This time, the compound fertilizer rich in nitrogen, phosphorus and potassium was used, and the amount of the 5-year-old tree was 1000 grams per plant. After each fertilization, it is necessary to turn over and water to promote the effect of fertilizer.
4, pest control: in the middle and late June, spray 25% chlorfenapyr No. 3 2000 times liquid or 1% avermectin 400 times liquid or imidacloprid 2000 times liquid to prevent jujube lines, peach small heartworm, jujube armyworm, jujube Ruler, spray again 1 day later. In the first half of July, spray 50% methyl thiophanate 1000 times solution or 50% bacteriostatic powder 600 times solution to prevent jujube rust. The branches with jujube madness are removed from the base.
Maxillofacial fixation system -- micro-plate for cranial and maxillofacial fracture fixation, designed for the surgical treatment of maxillofacial trauma fractures, suitable for the forehead, nose, orbit, zygomatic, maxillary region, and pediatric craniofacial bones.
The system is an orthopedic surgical instrument for neurosurgical tools. The maxillofacial fixation system includes micro-plates, straight plates, L-shaped plates, T-shaped plates, Y-shaped plates, double Y-shaped plates, H-shaped plates for cranial and maxillofacial fractures. The product range is complete, covering three-dimensional titanium mesh, self-drilling rotary bone screws, anatomical orbital floor plates, orthodontic nails, etc. However, the facial anatomical structure is special, and the screw plate needs to be placed away from the fracture line and avoid important anatomical structures such as nerves and teeth roots. Therefore, the specifications of the screw plate system are required to be as diverse as possible in order to be used in different bone structures, such as different radian, length, and number of screw holes. The bone plates forcranial and maxillofacial fractures are mainly divided into 1.5mm, 2.0mm and 2.4mm systems.
Titanium (including pure titanium and titanium alloy) is the most common material for hard tissue implants. Its elastic modulus and tensile strength are higher than those of human bone, and it is better than other metal materials such as nickel-titanium alloy and cobalt-chromium alloy in terms of biocompatibility and corrosion resistance. Our maxillofacial plate is made of titanium, and the self-tapping screws are mainly made of titanium alloy.
Jaw fractures include maxillary fractures and mandibular fractures. According to whether the fracture trauma is exposed, it can be divided into open fracture and closed fracture. Trauma is the most common cause of jaw fracture, which usually includes hit, traffic injury, fall injury, firearm injury, and a few iatrogenic injuries. All are caused by external forces acting directly or indirectly on the maxillofacial region. With the popularization of motor vehicles, the proportion of jaw fractures caused by traffic accidents has increased year by year, which has become the main cause of jaw fractures. In addition, neoplastic lesions in the maxillofacial region often lead to pathological jaw fractures.
In summary, maxillofacial fixation system has been widely used in clinical maxillofacial surgery, plastic surgery and ENT, and has a relatively mature market.
Titanium Plate,Rectangular Plate,orthognathic surgery,oral and maxillofacial
Jiangsu Aomed Ortho Medical Technology Co.,Ltd , https://www.aomedortho.com