To cultivate orchids and flowers is the pursuit of our artistic orchids, and some potted orchids do not bloom for many years, which is indeed disappointing. The flowering of Inland strain is a complex physiological phenomenon. After completing the research on the vegetative growth of the Chinese blue orchid (published in "China Orchid" 94(5)24-27), the author has conducted many exploration experiments for different substrates, different light treatments and application of hormones for 3 consecutive years. Searching for the mechanism and laws of flowering orchids, but ultimately failed to obtain the desired results. Under the premise that flowering is a complex physiological phenomenon in plants, several issues related to the flowering of orchids are discussed.
First, species problems. As we all know, the flowering and planting of plants is a physiological phenomenon that is needed for their own reproduction. For plants relying on vegetative propagation and reproduction, the physiological phenomenon of flowering and fruiting is obviously a dispensable minority, such as bamboo and cycads. Taking cycads as an example, although there are occasional flowering, the chances are few, and trees that do not reach the age of flowering (to complete the stage of growth and development) or blossoming can bloom year after year. I think also about orchids. She is mainly based on budding asexual reproduction, with incompletely developed embryos and extremely low reproductive efficiency. Therefore, flowering is nothing more than displaying the complete picture of the organs of higher plants. The non-flowering of the species is not allowed to reproduce. Orchids exhibit this physiological phenomenon. Except for the Longgan seedlings, there is basically no problem of “reproductive ageâ€. Only the sexually breeding offspring have the problem of childhood infertility. The vegetative breeders have no childhood, such as the flowering of the camellia flower in the same year; in practice, it can be observed that the new strong strains of Muran and Chunlan also flowered. This is enough. explained. Usually a strong blue plant, that is, physiological maturity, the environment is suitable for those who have the possibility of flowering, even on the same strain has more than 2 times open flowers. However, from the perspective of populations, it is impossible to fully flower, which is due to the limitations of multiple conditions of species, physiology and environment. This is also the case with orchid breeds, such as the color of the heart and the creation of orchids.
Second, physiological problems. In the process of plant growth, in addition to transforming light energy into biological energy (sugar) and accumulating organic substances, various hormones are also produced to regulate their own growth and development. Modern scientific research shows that when the growth hormone and gibberellin in the plant show a high level of growth, only when the growth hormone and gibberellin are at a low level and there is a high level of abscisic acid, ethylene and mitogen, it is beneficial to Flower bud formation and flowering. The formation, accumulation and distribution of various hormones are originally a physiological process. Although artificial adjustments can be made, they are not inherently effective. Therefore, in a common pot of orchids, some plants bloom, some plants do not bloom, and some have flowers this year and do not bloom next year; the phenomenon of no flowers after several years of transplanting is due to different ecological environments. The difference in hormone accumulation in the body is by no means a break in the "reproductive gene" chain (2-3 buds can also flower). At the same time, in each plant cell, there is only one genetic factor, namely a gene, and there are no growth genes and reproductive genes. The author believes that the growth and development of plants are two phases that are mutually related and completely different. Therefore, in practice, it is necessary to have vigorous growth for flowering and nutrient accumulation, and then
There is a relative pause in the process of growth, which promotes its turn to the reproductive stage and leaves buds blooming. It is also a fact that potted orchids that have been growing vigorously do not bloom.
Third, environmental issues. Dahl Literature says that "biology and the environment are unity." It is also an objective fact that one side raises water and soil. The growth and development of plants are not affected by environmental conditions. From this point of view, artificially adapting to the environment for the growth and development of orchids will undoubtedly be more conducive to the growth and development of orchids, and even induce them to mutate to meet people's appreciation needs. As mentioned above, in the growth stage, the temperature, light, water, heat, gas and mineral nutrients required for the growth of orchids should be satisfied so that the plants will grow quickly and robust; from the flower bud differentiation stage, the vegetative growth should be controlled to meet the reproductive requirements The conditions required. The author learned from many years of practice that, in order to bloom, from the beginning of June to July, to take control of water moisturizing (pot soil dry), appropriate lighting (increased light time and intensity), stop N increase P, K (K Fertilizer is particularly obvious) and less application of pesticides, etc., can receive a certain promotion effect. However, so far, the Lanzhou (science and technology community) indicators of the photoperiod (ie, dark period) required for flowering of orchids, effective accumulated temperature, soil water holding capacity, air dry humidity, and other conditions are not yet clear, and therefore there is no 100% orchid strain. Flowering reality.
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