Haizhou Changshan is a genus of Verbenaceae. It is produced in East China, South China, Southwest China, Liaoning, Shanxi, and Gansu, and cultivated in Hebei and Beijing. Its flower-filled and fruitful fruit is a good material for gardening. Haizhou Changshan fruit. Biological characteristics Haizhou Changshan is a deciduous shrub or small tree, up to 8 meters in height, with twigs and petioles yellow-brown pubescent. Leaves opposite, ovate to elliptic, 5 cm to 15 cm long, leaf tip acuminate, base truncate or broadly cuneate, entire or with microwave-like teeth. Inflorescences terminal or axillary, with reddish-brown forked pedicels; purplish red, deep 5 cleft. Stone drupe spherical, blue-purple, flowering from August to September, fruiting period from October to November. Haizhou Changshan Xiguang is slightly shade-tolerant and has a certain degree of cold-resistance. It can safely pass winter in central and southern Liaoning. Drought-resistance, impatience of stagnant water, strict requirements on soil, normal growth in sandy soil and light clay, but best growth in sandy loam with good permeability and permeability, and certain resistance to salt and alkali. Water and fertilizer management Although Haizhou Changshan is resistant to drought, it still enjoys a moist environment. Especially for newly planted seedlings and seedlings, it is necessary to strengthen watering. For the newly planted Changshan of Haizhou, the first three years of watering is of vital importance, which is directly related to the survival rate and the growth after planting. In general, the newly planted seedlings should be immersed in water once or twice a year in April, May, and June in addition to the first three waters. In September and October, it is also possible to pour water one at a time. The two waters can be smaller and smaller. If the water is too large, the plants can be prolonged, which is not conducive to safe wintering. But not watering is also not acceptable, because at this time, although it is in the autumn, the temperature is still high, and the transpiration of the plants is still very large. If the weather continues to dry without watering, the plant leaves will appear wilting. Therefore, it is advisable to water the Changshan Haizhou in September and October with no wilting of the leaves. July and August are plentiful periods of precipitation. If it is not too dry, it should be less watered or not watered. Excess water should be removed in time after heavy rain to prevent water from rot. The end of November or early December should be poured with anti-freezing water. In early March of the following year, the frozen water should be poured out in time. The water should never be too small. The subsequent watering can be carried out according to the method of the first year. The third year is managed by the method of the second year. From the fourth year onwards, only antifreeze water and thawing water need to be poured every year, and other seasons will grow if it is not too dry and reliable. The watering of the seedlings may be more appropriate than the watering times of the newly planted seedlings. The sufficient water can make the branches flourish and accelerate the growth. Haizhou Changshan Hi-Fat Fertilizer Co., Ltd. should be applied to the base fertilizer when planting, and the base fertilizer should be fermented with fermented cow horse dung or sesame sauce slag. The base fertilizer should be mixed well with the planting soil. In the subsequent management, some dry chicken manure, cow horse dung, or sesame paste slag was applied in combination with frozen water at the end of autumn. In the early summer, appropriate amount of topdressing urea can be applied, and some phosphorus and potassium fertilizers can be properly applied before flowering. It should be noted that fertilizing Haishan Changshan requires attention to two issues. First, it is necessary to pay attention to nutritional balance, and it is not possible to apply nitrogen fertilizer to prevent leggy or pests. Second, it is necessary to pay attention to alternate application of organic fertilizer and chemical fertilizer, or Mix to prevent soil compaction. Pest Control Pallida elegans chafer is the most common pest in Haishan, Haizhou, and is sometimes harmed by aphids and scale insects. In the event of a different occurrence of the celadon spp., black light can be used to trap and kill adult worms. Metarhizium spp. is used to infect and kill larvae. When the amount of adults is large, 3% hypertonic phenoxy-oxime EC can also be sprayed. The common disease in Changshan, Haizhou, is coal pollution. The pathogen of this disease belongs to Ascomycete subphylum Connexaceae fungus. The asexual generation is a semi-known fungus. Mycelia, conidia and ascospora are overwintering on the host. By airflow and insect spread. The conidia and ascospores on the excretions and secretions of the sucking pests of the aphids infested the host for a long time, and the black coal smoke appeared in small coal spots. The conidia could be repeatedly infested and the coal smear layer gradually expanded. Thickening, and often cover the entire blade, so that the leaves can not light and role, affecting the viewing and growth. If there is any occurrence of coal pollution, pests such as aphids and scale insects should be controlled first. In the routine maintenance process, ventilation and light transmission should be strengthened to remove excessive dense shoots in time. Pruning method When the main branch of the sapling reaches a certain height, a short cut is made according to the need, and three or four strong branches are selected as the main branch. The selected branches must be evenly distributed and not grow on the same track, but should also be linked to the main trunk. There is a certain degree of opening angle, and all other branches are removed. A short cut is made on the main branch left after selection, and the outer bud is left under the cut. When the new shoot is about 50 centimeters long, a short cut should be made. Then, the strong branch is selected for lateral branch culture. After the basic tree is formed, normal management can be carried out to eliminate the dense branches, pendulous branches, cross branches, disease and insect branches and leggy branches in time, and appropriate short cuts should also be taken for some long branches. Breeding method Haizhou Changshan breeding can adopt seeding method, ramets method and cutting method. A large number of seedlings can be obtained at the time of sowing and breeding. They can be sown after the seeds are sown in autumn, or sowed after the stratified sands are collected. The seedlings are planted by digging the roots of the sprouting seedlings and planted in the planting hole with the base fertilizer. Wet soil can survive; cutting propagation can be harvested in June and July when semi-lignified branches are used for cuttings, cutting length is 12 to 15 cm, only 2 to 3 leaves are retained, and ABT rooting agent is inserted after disinfection. In the matrix, keep the matrix moist and spray regularly. In the winter, the shed is overwintering. Oropharyngeal Airway,Disposable Orapharyngeal Airway,Oral Airway,Opa Oropharyngeal Airway Shaoxing Jenston Medical Products Co., Ltd. , https://www.sxjcmed.com