Maintenance of Populus tomentosa bonsai

Adequate sunshine and moisture for the placement of boxwood bonsai, it is best to choose a place where "the sun can be basked in in the morning, the afternoon is cooler, the air is well ventilated, and the rain and dew depend on nature". If you watch it indoors, you'd better let it go to the sun and rain again after ten and a half days. The basin of Populus tomentosa bonsai should always be kept moist, because its root absorption, leaf photosynthesis and the whole growth process require a lot of water, and of course the demand also varies with the seasonal climate. Populus tomentosa grows from the edge of rivers and streams to a small basin in the garden. The biggest change in the environment is that the humidity of the environment is small, which depends on our maintenance to give it a timely and appropriate amount of supplement. Therefore, watering should pay attention to climate, pay attention to technology, and ensure quality. When the temperature is above 20 ℃ and there is a shortage of water in the basin, watering is divided into three steps: the first step is to dry the immobile soil (to meet the water demand in the basin); the second step is to wet the branches and leaves thoroughly (multi-angle watering); and the third step is to spray. In summer days or when the temperature is above 20 ℃, if there is no shortage of water in the basin, follow the second and third steps; when the temperature is below 20 ℃ and above 10 ℃, there is no shortage of water in the basin. In winter morning, in the sun, water is watered once a day according to the third step. After "White Dew" in autumn, wait for the dew to dry, press the third step to spray water. Do not water the frost sooner or later; do not water before the "three or nine days" cold wave to prevent permafrost, freeze branches and leaves, and also keep the drainage in the basin well ventilated.

When applying thin fertilizer frequently, the fertilizer of Populus tomentosa should be based on natural fertilizer, human and animal feces. Careful application of chicken and duck manure and efficient fertilizer, remember not to apply non-mature fertilizer and excessive fertilization, to achieve frequent application of thin fertilizer. Apply some seasonal fertilizer before the season change, such as sprouting fertilizer in early spring, strong leaf fertilizer in summer, temperature-resistant fertilizer in summer, and heat preservation fertilizer in winter; apply some supplementary fertilizer after each pruning, apply more supplementary fertilizer in the rainy season and summer, and apply discretionary fertilizer if the growth is not good.

The wood of Populus tomentosa with shearing as the main shape is hard and brittle, the branch skin is thin and easy to hurt, and the plasticity is not big, so we should first pay attention to the selection of piles, and then because of tree conditions, guide according to the situation, the shape must be pruned mainly. Can also be properly tied with rope to pull, the branch displacement should be in place several times, that is, can not be demanding, can not be eager for success, otherwise it will be counterproductive. Avoid twisting branches with iron wire to prevent skin injury and dead branches.

The trunk of Populus tomentosa bonsai grows very slowly and very vigorous, but the tender branches grow faster, and the density of the leaves is bound to lengthen, so it appears soft and scattered. Only by "picking the heart" can the ornamental value be guaranteed. That is, before the branches are lignified, leave one pair, no more than two pairs of tender leaves, and take off or cut off the rest. Under the appropriate conditions of water and fertilizer, it will send out two buds in ten and a half days. In this way over and over again, its branches appear short and thick, and the leaf can double the product of 2, constantly improving the ornamental value. Then it is necessary to remove the bud in time. Populus tomentosa begins to have buds before summer and autumn. When it blossoms in spring, the nutrition of flowers and fruits accounts for 70% and 80% of the whole tree, which will inevitably affect its normal growth and beauty. We mainly watch the leaves. Therefore, it is necessary to remove it from the beginning of seeing the bud.

Most of the roots of Euonymus tomentosa are fleshy fine roots, and its water and nutrient absorption is mainly the absorption function of the root tip, which is secondary to the length of the root arm. The root is too long to stretch in the basin. Bending and kneading is very harmful. Moreover, in order to absorb nutrients, the root tip will naturally extend forward and come into contact with new soil. If the root grows, it won't take a long time, and the root tip will hit the wall. Although the root tip will turn, it will take a lot of time and time to affect the growth. In particular, the basin wall and bottom will soon be covered with roots, forming a soilless "root plate", and the basin will have to be changed. This creates a vicious circle. Those who change pots with soil (it is not advisable to bring more soil) should cut off the long roots exposed in the soil. The best season to change the basin is early spring (after the root is fixed, it can sprout). Second, the summer day is growing vigorously (after changing the basin, it will be placed in the shade for seven or eight days, and it will resume its prosperity).

The larva of the leaf roll moth, the larva of the leaf roll moth, most likes to suck the leaf juice of the yellow poplar. After the leaf roll worm is born, the silk can curl the surrounding leaves. It hides in the middle and sucks the leaf juice. In two or three days, it absorbs the juice of the curled leaves, leaving behind a network of white veins. At this time, it transfers the damage and does not kill it in time. After five or six days, it will destroy all the leaves. It not only destroys beauty, but also those who do not grow well will die as a result. Leaf curlers as long as the general "sucking", "contact" pesticides can eliminate it, the most important thing is to find and extinguish it in time. It is worth noting that the eggs of the leaf roll moth can hatch into harmful insects in only three or four days in summer days, especially when the temperature is above 30 ℃, and the generation is the fastest. So when the temperature is high, it is better to catch and kill once a week.