Fertilization and nursing of orchids and prevention and control of diseases and insect pests of edible fungi

On the issue of orchid fertilization, some people think that orchids grow in the mountains, elegant nature is not suitable for fertilization, while most people think that orchids are ornamental plants, and the soil cultivated in flowerpots is limited, so they should be fertilized. Compared with previous orchid works, there are records of fertilization, so fertilization is necessary. In the process of orchid cultivation, in order to make orchids grow well and blossom more and brightly, orchids should be given proper fertilization. As a result, orchids grow slowly. There is symbiosis of orchids in the roots of orchids. After fertilization, orchids absorb the nutrients needed by orchids, but the effect of fertilization is often slow. In addition, the difference of plant materials also affects the judgment of the effect after fertilization. Therefore, when cultivating expensive orchids, people are very careful to fertilize orchids. It is even thought that orchids will grow and blossom without fertilization. In fact, proper fertilization is better for orchid growth and flowering than no fertilization. Orchid researchers carried out reasonable fertilization on the basis of analyzing the data of carbon-nitrogen ratio in leaves or pseudobulbs. The results show that this can promote growth and regulate florescence to increase flowering. Practice has proved that reasonable fertilization is necessary for orchids.

The nutrients needed for the growth of orchids are carbohydrates, large amounts of elements and trace elements, which are the main nutrients for the growth of orchids. It comes from photosynthesis, carbon comes from carbon dioxide in the air, hydrogen and oxygen are obtained from water, but washing oxygenated water for orchids is very beneficial. Many elements are needed in the process of orchid growth. To include nitrogen, phosphorus, potassium, sulfur, magnesium, calcium and other elements, these elements are mainly obtained from plants, or artificially added. Trace elements in the growth process of orchids, the need for small and essential. Such as boron, manganese, iron, zinc, copper, aluminum and other elements. It comes from the soil, nitrogen fertilizer promotes plant growth, and the leaf color is thick green. When the nitrogen fertilizer is excessive, the plant cell wall becomes thinner, the plant body is soft, and the resistance to diseases and insect pests is poor. When the nitrogen fertilizer is insufficient, the leaf color is yellowish and the plant growth is slow. Phosphate fertilizer promotes plant cell division, enriches orchid plants, and forms leaf buds and flower buds. Excessive phosphate fertilizer will also inhibit the growth of orchid plants. Potassium fertilizer dissolves nutrients and transmits nutrients to cells to enrich each group of orchid plants and improve drought resistance and disease resistance. without potassium, orchid plants are weak or even hinder their growth. In different growth periods of orchids, spray the necessary fertilizer, do not use a kind of fertilizer for a long time. For example, the nitrogen, phosphorus and potassium of Huabao made in the United States are all uniform, and different fertilizers are applied in different seasons. Foliar spraying is carried out regularly, and the general cycle is 7 Mel once every 10 days. The dilution ratio is generally about 1, 000 to 1, 500, and the spraying time must be before sunset in the sunny morning or evening. After spraying fertilizer, the leaf surface dries better within 1 hour. The amount of spraying should be moderate and reasonable. It is limited to all the moisture on the leaves.