Planting method of Magnolia grandiflora (points for attention in transplanting Magnolia grandiflora)

Magnolia grandiflora is an evergreen tree, which is often used for landscaping. Its tree is tall, its trunk is tall and straight, and its leaves are thick leather and bright dark green. Huge white flowers bloom every summer, which are deeply loved by garden lovers and widely used in landscaping in the north and south.

However, the survival rate of Magnolia grandiflora transplantation has always been a difficult problem for many landscaping workers. I went to Zhumadian for a business trip two days ago and met Gong who has been engaged in greening for more than ten years. It happened that his construction site was transplanting Magnolia grandiflora, so we talked about this topic.

Today, I briefly sorted out some experiences and precautions we talked about that day, hoping to help you!

1. What is the main reason for the low survival rate of Magnolia grandiflora transplantation?

There are two main reasons for the low survival rate of Magnolia grandiflora transplantation:

The first reason is that the root system of Magnolia grandiflora is fleshy and relatively afraid of waterlogging, but it likes warm and humid environment, so watering after transplanting is a key to the survival of Magnolia grandiflora.

The second reason is the transplanting season of Magnolia grandiflora. The cold tolerance of Magnolia grandiflora is relatively poor, and whether it can be transplanted safely in autumn and winter is the key. Transplanting in spring, although there is no need to consider the winter problem, but the summer in the north is dry and hot, and Magnolia grandiflora is easy to die because of water loss in the tree; If you encounter dry and hot wind again in late summer and early autumn, the water in the branches of Magnolia grandiflora will be completely drained by the wind.

Second, what are the precautions to improve the survival rate of Magnolia grandiflora transplantation?

1, the time of transplantation

The transplanting time of Magnolia grandiflora can be in spring and autumn, but the matters needing attention are different in different seasons.

If it is transplanted in spring, you can choose early spring or March, when the trees have just begun to grow again; However, after entering May, with the increase of temperature, we should pay attention to the moisturizing problem of trees to avoid excessive evaporation of water from trees caused by high temperature.

If you transplant in late autumn and early winter, you should pay attention to the heat preservation in winter after transplanting. You can plant it deeper properly, and in addition, when it is cold, you can surround the roots of the trees with some soil, and then remove the soil in March-April of the following spring.

2. The problem of transplanting soil

Magnolia grandiflora is an acidophilic plant and likes a slightly acidic soil environment. If the soil in the transplant site is salty and alkaline, it will definitely affect the survival of Magnolia grandiflora after transplantation.

Therefore, for Magnolia grandiflora transplantation in alkaline areas, it is necessary to do a good job of discharging alkali and salt from planting holes. You can spread a layer of coarse sand at the bottom of the planting hole as an alkali barrier, and then try to choose the reconfigured soil for backfill. If the alkalinity is weak, you only need to make a layer of alkaline coarse sand, and the backfill can be the soil when digging holes.

3. Dig a hole before transplantation.

In the process of digging Magnolia grandiflora, we should pay attention to three main problems: one is the size of soil balls, the other is pruning and picking leaves, and the third is trunk wrapping.

(1) Soil ball size:

Magnolia grandiflora is a fleshy root system, and its new roots have weak germination ability, so it is more prone to freezing injury, so the size of soil ball is a key to Magnolia grandiflora transplantation. Generally speaking, the size of the soil ball should be 8~ 10 times that of DBH, so as to ensure that the root system is less damaged.

In addition, because there are not many lateral roots of Magnolia grandiflora, most of them are downward roots, so when digging the ball, try to dig it into a top shape, not a cone or a disc shape.

(2) the problem of pruning and picking leaves:

Magnolia grandiflora is an evergreen plant with dense branches and leaves. In order to reduce the pressure on the roots of Magnolia grandiflora after transplanting and avoid the death of seedlings due to excessive nutrient consumption after transplanting, it is necessary to prune and pick leaves of Magnolia grandiflora during transplanting.

When pruning branches, it is mainly to prune internal branches, overlapping branches, pests and diseases, and the whole tree shape of trees cannot be destroyed because of pruning.

When picking leaves, it is mainly to remove about two-thirds of the leaves from the remaining branches, neither more nor less. Too many leaves will affect the transpiration tension of plants, making it difficult for the roots of seedlings to absorb water; If the leaves are picked too little, the water in the plants will evaporate too much and dehydrate and die. .

(3) The problem of wrapping the trunk:

When digging Magnolia grandiflora, be sure to wrap the trunk of Magnolia grandiflora. The wrapping material can be thermal insulation cotton or straw rope, and the height of the wrapping generally needs to be more than 2 meters.

This can not only avoid the mechanical damage to the branches of Magnolia grandiflora during excavation and hoisting, but also ensure the moisture retention of the transplanted trunk of Magnolia grandiflora. In the first two years of transplanting Magnolia grandiflora, it can also avoid freezing injury of Magnolia grandiflora trunk in winter and cracking of bark caused by sun burn in summer.

4. Management of Magnolia grandiflora during and after transplantation.

(1) considerations for transplantation:

Size of planting hole:

When transplanting Magnolia grandiflora, the planting hole can be dug relatively large, and the depth of the planting hole is slightly shallower than that of the soil ball by about 10 cm. You can dig deeper, backfill some soil at the bottom, and then plant trees.

The problem of watering:

In the process of planting Magnolia grandiflora, it is very important to fix the root water. As long as the root water is poured thoroughly for the first time, if it is not particularly dry, there is no need to water it frequently. However, in the actual construction process, due to the negligence of the construction period or greening workers, this link is often ignored. Root water is either not poured thoroughly or poured too often.

How much is DBH 10cm Magnolia grandiflora for the first time? Generally speaking, if there is a hydrosphere, it only takes four to five times to fill it up, and then water-seeps-seeps until the water in the hydrosphere stops seeping down (30 minutes to an hour).

(2) Maintenance after transplanting:

Moisturizing problem:

For trees transplanted in spring, after entering May, the trunk and leaves can be sprayed to keep the water in the tree from losing.

Problems of water and fertilizer management:

In daily management, attention should be paid to watering in time during drought and draining in time when it rains for a long time, so as to avoid the root of Magnolia grandiflora being in a wet and stagnant state for a long time, so as to avoid root rot.

Cold protection:

Three years before transplanting Magnolia grandiflora, we should do a good job of cold protection. It is best to wrap the trunk with thermal insulation cotton. When the temperature is below 0 degrees at night, the roots should be surrounded by soil and open in March and April of the following year.

Pay attention to the above problems, and basically the survival rate of Magnolia grandiflora transplantation will be guaranteed.

Well, today, I will introduce the matters needing attention when transplanting Magnolia grandiflora.