Why is it more suitable to plant trees in spring and autumn?

As we all know, March 12 is a traditional arbor day every year. Spring has come and everything is revived. When planting trees in spring, the trees are still in dormancy, and it is easy to reach the physiological balance between the above-ground and underground parts after planting. At this time, the soil moisture in most parts of the country is good and the water is sufficient. It is beneficial to the survival of trees, suitable for planting in most parts of the country and almost all tree species in spring, and the survival rate of trees is high. It is best to transplant trees in early spring, when the soil thaws and the plants have not germinated. Generally, it is February-March, with slight differences in different regions. Plans can be made in advance according to the spring germination time of tree species and the thawing time of different planting sites. ?

In spring, as the temperature rises, it begins to grow and sprout. Planting trees at this time is not harmful to the whole tree. As long as you are serious, the survival rate is 98%. In summer, the temperature is high and the trees are in the growing period. At this time, planting trees will do great harm to trees, and leaves will fall off easily. As we all know, trees rely on leaves to absorb nutrients. So the survival rate is extremely low. ?

Planting trees in autumn is dormant after defoliation, with fragile physiological metabolism and less nutrient consumption, which is conducive to maintaining physiological balance. If planted at this time, after a winter, the roots will combine with the soil and germinate in early spring, which is in line with the phenological order of Mr. Shu's root germination and is not suitable for cold-resistant hollow tree species. China has a vast territory, and the temperature difference is easy to be large. Trees can also be planted in some places, but keep warm and the survival rate is not high. In addition, it will grow and sprout in the next spring. ?

In winter, the temperature is low, and the soil freezes and does not grow! However, it can be planted in areas such as East China, Central China, South China and the Yangtze River Basin where the soil is basically not frozen in winter. When planting trees, we should pay attention to pruning some branches and leaves to reduce evaporation and maintain the moisture of trees. It is not difficult to plant living trees, and the most important thing is daily management. The risk of planting trees also lies in management. The most unsuitable time is summer, which is the peak season for tree growth. In addition, the summer weather is hot and the evaporation is large. When planting trees, the roots will be damaged and the trees will dehydrate and die.