Why did the leaves of Michelia mollissima wither?

Mr. Shen Liming of Tongluo Labor Service Company in Wujiang City, Jiangsu Province wrote and asked: I bought Michelia mollissima sprouts from Zhejiang this year, and their growth is very poor. The symptom is that the upper leaves withered, while the lower roots are good. What is the reason for this?

Answer: Michelia mollissima, also known as bright-leaf white orchid, is a kind of evergreen ornamental flowers and trees with great development prospects. Judging from the situation that the leaves withered and the roots of the buds you bought withered, the reasons for the withering of the leaves are as follows: first, the leaves lost more water during transplanting and transportation, due to the loosening of the root soil, and the corresponding leaf spraying and moisturizing work was not done during the transportation. in addition, the root system of the bud seedling is relatively fragile and tender, which is directly exposed to the air, so that its fibrous root is damaged to a certain extent. It is fleshy root, it is not easy to show that the vegetative fibrous root is damaged quickly and obviously, and the bud seedlings fail to cut off part of the leaves properly after planting, so that the leaves can not get the proper water supply when the root system does not restore the absorption function. as a result, its leaves naturally dry up and wither. Second, did not take appropriate spray moisturizing measures after planting, such as cutting off some leaves properly when planting, spraying the seedbed after planting, taking into account the foliar spray, and inserting bamboo slices on both sides of the seedbed, covering the plastic film to moisturize, and then setting up a shed to cover the seedlings, it is possible to gradually restore the dehydrated leaves, and then remove the film after restoring the leaves to stand upright. Because these measures failed to keep up, the leaves withered in the end. Third, Michelia mollissima seedlings are more shade-tolerant, in the process of conservation, the cultivation soil requires sandy soil, can not accumulate water, and must set up a shed to shade in time, while keeping the seedbed moist, we should often give foliar spray, otherwise there will be leaves that will continue to wither.

According to my experience, if the big and medium seedlings of Michelia mollissima are transplanted, if the soil ball belt is not good, they may even become bare root seedlings, as long as the root is moisturized during transportation, the foliage is sprayed on the way, and depending on the specific conditions of the root soil ball, some branches and most of the leaves are cut off, and the foliar spray is strengthened after planting, the survival rate of transplanting is generally higher. If the root system is not good and most of the branches and leaves cannot be cut off, a large number of leaves often blacken and fall, and the tip of the branch dies, but the trunk and thick branches, especially the lower part of the stem, generally do not die, and it will take 1 to 2 years to restore its original plant shape. This point should be paid great attention to when transplanting Michelia mollissima seedlings in deep mountains. (Hu Yimin)