1. Improve soil organic matter content
Soil organic matter can promote the formation of soil aggregate structure, increase soil permeability, and improve soil water retention capacity and cushioning performance. Measures to increase the organic matter of the orchard include orchard covering, planting green manure, returning the fruit trees to the roots, and applying organic fertilizer.
2. Balanced fertilization
There is a mutual help and antagonism between the nutrients, and a certain proportion should be maintained when fertilizing. When the necessary mineral nutrients in the soil are lacking, the apple tree cannot grow normally; when it is too much, it is not conducive to the growth and development of the apple tree. When there are too many trace elements, the apple tree will be poisoned.
3. Timely topdressing, a small number of times
Apple trees grow three times in a year: the first time from early April to early May; the second time mostly occurs from early June to mid-July; the third is after mid-September, the duration is longer. Long, can be extended to mid-late November. The topdressing period should be carried out at these three growth peaks.
4. Scientific fertilization
When the fertilizer is applied, the organic fertilizer and the soil are backfilled in the compartment, and the soluble fertilizer can be applied through the drip irrigation system in the orchard. Urea, borax, zinc sulfate, amino acid calcium, etc. can be sprayed on the foliar surface, and the foliar application time is preferably carried out before 9 o'clock and after 16 o'clock on a cloudy or sunny day.
5. Moderate watering
Fertilizers can only be absorbed by apple tree roots when dissolved in water, but excess water in the soil will not only anaerobic roots, but also leaching of fertilizer. After fertilization, it should be irrigated according to the soil water content.
6. Do not be superstitious fruit tree fertilizer
The special fertilizer for fruit trees is not a general fertilizer for all kinds of fruit trees, nor is it suitable for all areas, but it is relatively suitable for a certain age of a tree species in a certain region.
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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