Post-planting management should pay attention to keeping the soil moist and slightly dry. Don't water the roots frequently after watering, which can increase the soil temperature and is conducive to rooting. When the sun is too strong, water should be sprayed on the tree and soil surface to adjust the temperature difference, which is beneficial to the germination of new roots and branches. Hot weather, wet and cool roots are easy to cause ants. When watering, you can water the dry tea once or twice or put the pesticide Funandan to kill ants. Pay attention to prevent rust after survival, and spray bactericidal pesticides such as "carbendazim" or "fenxiuning" on branches and leaves twice a year from the end of February to the end of March. The interval of application is 10 day, or a little insecticide such as "killing the enemy" or "dead net" is added, which is convenient to kill small green-shelled snails and prevent the bark of small shoots from being damaged. Pine and cypress trees have no other major pests and diseases, and are easy to manage after survival, and can be initially pulled out and reshaped after winter in the following year. Don't peel off the relics in a hurry, and then trim the shape when the branches grow to a certain thickness.

How to improve the survival rate of transplanting Pinus thunbergii

It is generally believed that the transplanting time of Pinus thunbergii is from winter dormancy to February and March in early spring. In fact, the best period should be the eve of the Spring Festival (Fujian, Guangdong) to Arbor Day (12 March).

If it is transplanted in early winter, strong roots can not promote new roots at low temperature. At this time, the close contact with new soil is too long, which is easy to cause the wound to fester and increase the management difficulty. However, for the pile head that can't carry soil balls, if pine buds begin to sprout in spring, the loose liquid flows loosely, and the roots can't absorb effective nutrients from the soil in time, it will lead to the imbalance between supply and demand of plants, and even if pine buds are extracted, they will gradually turn yellow. Therefore, when you meet good materials and can't move the soil ball, you should transplant them as soon as possible, so that they can slowly differentiate and take root and sprout in the new soil. It is worth noting that when transplanting, we should take care of the fine roots as much as possible, especially the thick roots with greater vitality. The fine roots will become more and more precious, especially the vertical main roots will be thicker and more important. When transplanting, try to reduce redundant branches and reduce the burden on trees.

Black pine is most afraid of rotten roots. Preventing rotten roots and promoting new roots are another important link related to the survival of black pine. The first is the preparation of pot soil. It is best for black pine to be around PH 6.5. North alkali of south acid. In the south of China, the PH value of most soils is slightly acidic, so pine roots need growth conditions with good air permeability and rapid dehydration. Usually, it is ideal to use Sanmao soil, that is, the mountain soil is white to granular with uneven thickness, which can be ground into powder by fingers, and then mixed with two parts of loess (that is, mountain soil) or sand. If there are no conditions, loess can be thickened with sand. If the sediment content of mountain soil is high, less sand will be used, and vice versa. In addition, the new incision of root bark should be smoothed with a sharp knife and coated with vaseline before planting, some can also be waxed with wax oil, and some can be coated with chlortetracycline ointment. In short, as far as possible, the new incision will not be soaked in water and fester when the basin soil is too wet. When the newly planted pine trees are not alive, foliar water should be sprayed many times a day, so that the dripping water can not penetrate into the culture soil, resulting in the basin soil being too wet. Usually, a large piece of film can be wrapped around the pile head and tied tightly with wires. If the first fulcrum is higher than the ground, you can roll the film a little higher, then open the film and pull it obliquely outward, so that all the excess water dripping from the leaves can be guided out. In this way, the surface of the head soil is easy to dry, and the wetting and drying of the basin soil is artificially controlled.

The environmental conditions of transplantation are also very important. It's best not to have the radiation of the sunset in the afternoon, and there's no need to dig a pit, especially a deep pit. Potting is poor, the ground value is easy to depend on the ground temperature, and it is easy to adjust the dry humidity and ventilation, promote the growth of new roots and improve the vitality.

The author once transplanted a big black pine pile nearly two meters high with a head pile diameter of more than 20 centimeters. Because of the loose sand, it survived the summer after planting on the ground and grew smoothly. The practice is as follows for reference only.