What effects does excessive wind have on the sheaths

OrchidsDuring the recent period of neglected management, damage to the sheaths and bracts appeared, with some severely affected flower buds showing signs of withering. Through analysis, the causes have been identified. Below, solutions and preventive measures are discussed around these two phenomena.
I. Sheaths
The sheath is the protector of immature orchid plants, playing a role in supporting the orchid plant's growth and formation, and is key to the orchid growing strong. Premature withering of the sheath during the orchid's growth process is a major taboo; at best it affects growth, and at worst it provides a breeding ground for harmful bacteria, ultimately leading to plant withering and premature decline.
In our orchidcultivationmanagement, we have always assumed that excessive dryness or moisture damages the sheaths of new plants before they mature. In fact, excessive or concentrated airflow from wind can also cause the sheaths to dry up, and even when the air temperature is maintained at around 80 degrees, the above phenomenon can still occur.
The small fan in my orchid room has been running constantly, and it is level with the pot surface. Recently, I found that in the central area directly blown by the fan, most of the sheaths on new shoots appeared dry and brown, seriously affecting the later thickening of the pseudobulbs.
The sheath on an orchid plant that matures in the current year can stay fresh for one to two years, rarely three years in a healthy state. On orchid plants that mature over a span of two years, its freshness generally lasts two years, and rarely is the sheath fresh for three years. When encountering a poor living environment, it first shows blackening or drying up, such as when the root system is damaged by excessive dryness or moisture, or when the air is too dry or too humid. From this, it can be seen that the sheath's signal is like the human tonsils: when harmful bacteria invade the internal organs, they first become inflamed, swollen, and painful to draw people's attention. If ignored, worse things are sure to follow.
II. Bract sheaths
The bract is the layer upon layer of clothing that wraps the flower bud. Its role during flower bud development is extremely important. Premature death will inevitably affect the development and growth of the petals and the later elongation of the flower stem, and in severe cases directly cause the flower bud to wither or become infected with harmful bacteria and mold. Whether the bract sheath remains intact is the primary factor determining whether the flower stem can elongate and the flower can open properly, and cultivation managers should pay attention to this. A healthy bract will shed its layers distinctly as the flower stem elongates, prompting the flower stem to grow rapidly to its full extent within the effective period, making the flower elegant and charming with more depth.
On a stem with an ideal bloom, its five bract sheaths mostly appear healthy. Damage to the bract sheath causing distortion will affect the elongation of the flower stem and the opening of the flower to varying degrees, bringing more or less negative impact on the overall aesthetic.
III. Solutions and preventive measures
Under concentrated airflow, the sheaths are prone to drying up. Slightly dried bract sheaths will show a bit of rust color. When this is discovered in time, the wind direction and volume should be adjusted immediately so that it does not blow directly. Generally, slightly damaged sheaths will stop drying further, and the bract sheath will extend its second and third healthy layers in subsequent growth. In this way, the damage will no longer worsen.
Scientific and reasonable air circulation is indispensable in cultivation management. For powered airflow, choosing a point about 1 m above the leaves is best. Natural wind can be regulated in strength through windows, and at the same time do not forget to increase air humidity.
The water-holding capacity of the growing medium is best kept in a constantly moist state. It should not be too dry or too wet for more than three days; otherwise the sheaths will inevitably show damage to varying degrees.
Careful observation combined with scientific and reasonable management is thekey tocultivating good orchids.
Postscript
During this period, excessive wind blowing directly has caused the bracts of my Guoxiang Fengyun flower buds, the new Huilan flower buds of Ruibao, some flower buds of the new green Huilan Piaomen flower, the Guoxiang Baihe flower buds, and the Cangyansu flower buds, among others, to dry and rust. The sheaths of the new plants of Dayipin and Guanglingdie have dried up, seriously affecting the new plants' ability to grow strong.