Usually, once found, it needs to be cleaned up in time to avoid infecting other healthy parts. The main thing is to remove dead branches and rotten leaves and cut off rotten roots until they turn white. Then use carbendazim and other drugs for disinfection and sterilization. But for rootless seedlings, it is best to cut off half the leaves and keep the height at 15 cm, which can save some nutrients and promote rooting and germination.
In this case, the ability of orchid plants to absorb nutrients and water is largely limited, and they are mainly transported by pseudobulbs. Therefore, it is suggested to cut off some leaves of rootless seedlings, otherwise it will affect the germination of new roots and then affect the growth of orchid seedlings. However, in order to bring rootless seedlings back to life, the following operations are still needed.
I. Preparation of Plant Materials
First of all, we need to prepare planting materials reasonably according to the growth demand of blue seedlings. We can use fine-grained planting materials and then mix 15% rice bran ash and 15% mountain mud. If there is no such matrix, we can use burnt cinder ash.
However, there are many preparation schemes of plant materials, such as snake sawdust, coarse sand, sawdust powder, fine particles of broken bricks and so on. As long as the prepared plant material is not effective in fertilizer and is loose and breathable. However, Bian Xiao still recommends that you use rice bran ash, because this planting material has a very good effect on sprouting new roots and buds of rootless seedlings.
Second, pot planting
The depth of the flowerpot used for the upper pot should be appropriate to ensure that the pseudobulb of orchid plants is kept at two thirds of the pot depth, and then the planting material with the thickness of 0.5- 1 cm should be covered on the pseudobulb, so that the upper pot planting can ensure a better moisturizing effect and avoid dehydration of rootless orchids.
Third, maintenance management.
After potted plants are planted, they should be placed in a cool and ventilated place to avoid direct sunlight and let them receive scattered light. If potted plants are placed in an outdoor environment with high temperature, it is suggested to set up a sunshade net for them. Usually pay attention to the wet and dry conditions of plant materials in the basin, and replenish water and moisturize in time. Especially in the season when orchids grow rapidly, it is necessary to ensure that a certain humidity can be maintained in the basin.
In addition, growth hormone products can promote the rooting and germination of rootless orchids. It was originally produced in WWw.pjCN.ORg, but it should be applied at the right time. If orchid plants are dormant, the effect on rooting and germination is not obvious. The main reason is that the environmental temperature is not enough, which makes its growth lifeless and usually dies during the growth period. However, it can still be done at room temperature.
In general, the application of growth hormone to rootless orchids should be carried out in the growth period, because the growth factors of orchids are full of vitality and good absorption, and the effect of germination and rooting in the growth period is obvious. Generally, it is carried out during 1- 10 every year. Generally, it is scientifically matched according to the instructions for use. Rootless seedlings can be watered once a week and three times in a row.
However, we can also take the method of soaking the roots with hormones and water to promote the rooting and germination of rootless seedlings, generally about 30 minutes. At the same time, it can also be irrigated with fixed basin water, but it is not appropriate to apply growth hormone at this time, because rootless seedlings do not need nutrients at this stage, and what we need to ensure is to let them overwinter safely.
Usually, when the new seedlings grow to a height of more than 3 cm, the new roots and buds basically grow stably, so we can supplement nutrition appropriately. Usually, some dilute liquid fertilizers can be topdressing, such as potassium dihydrogen phosphate diluent, cake fertilizer water and so on. Remember that the concentration must be low enough. Then the rootless seedlings can be managed as ordinary blue seedlings. Because of the rootless seedlings before, they have been completely fed at this time.