How to cultivate poinsettia and matters needing attention? How to manage the water and fertilizer of poinsettia planting

This year, a new family of the Magenta family has been added, and the new variety "Sunshine" launched by Guangzhou Yihua Horticulture Co., Ltd will be launched soon. The characteristic of "Sunshine" is very outstanding, with uniform crown and very good branching. Compared with Yihua's main variety "Golden Award", "Sunshine" is growing faster, 7 to 10 days earlier than "Golden Award", and it takes only 90 days from seedling to finished product. Strong cold resistance, even if the temperature is as low as 12 degrees Celsius, it can grow normally. Recently, the reporter interviewed Zhou Shiliang, general manager of Guangzhou Yihua Horticulture Co., Ltd., who explained in detail the main points in the production process of "Sunshine".

Lighting control

In the seedling stage above the basin, the roots of the seedlings are relatively fragile, and the light intensity should be reduced. Week-the top of the greenhouse should cover 75% of the sunshade net. If the seedlings fall off in summer, you should drink some water on the ground to increase the humidity of the air. When the roots of the seedlings are not good, too much light can lead to dehydration and dehydration of the seedlings. The seedlings entered the shed-after a week, it was better to increase the light and keep it at 20000 lux.

For about 5 days, observe whether the root of the plant grows to the bottom of the basin. If you reach the bottom of the basin, you can choose the heart. After topping, the lamp should be controlled between 1.5 million lux and shaded for two consecutive days. Injuries to plants that have been cared for. At this point, remember not to expose them to the sun. After two days of shading, moderately increase the light and keep it between 15000 and 20000 lux. After growing on the seedlings for 45 days, the plant blossoms about 25 centimeters. If it is in summer, it needs to be dyed black. In winter, turn off the lights, that is, stop the night lighting to ensure that the lighting time of the plant does not exceed 12 hours. After turning the bracts, the light was controlled at 15000 lux and completed after 50 days.

Temperature and humidity management

The better growth temperature of "Sunshine" is between 18 °C and 28 °C, and the lower temperature should not be lower than 12 °C. Otherwise, plant growth will slow down and the finished product will be prolonged. In the seedling stage, the temperature should not be lower than 15 degrees Celsius at night, otherwise the plant growth rate should be slowed down, the plant growth rate should be controlled below 32 degrees Celsius during the day, and the greenhouse should be ventilated and the humidity should not be less than 50%. After topping, the temperature in the greenhouse should be kept within 30 degrees Celsius, and the humidity should not be less than 65%, because if the light is too strong, the temperature is too high, and it is too dry, it will affect the germination and growth of plant lateral buds.

During flowering, the night temperature must be below 24 degrees Celsius. The magenta flowering stage, also known as the induction cycle, refers to the time it takes for the finished flower to change color. During the induction cycle, if the temperature is higher than 24 degrees Celsius, it will affect the flowering, flowering and growth of plants. At this stage, we must pay attention to reduce the humidity, not more than 70%, otherwise prone to diseases such as gray mold. In the induction cycle, the temperature is preferably controlled between 16 degrees Celsius and 18 degrees Celsius to make the plant more colorful. After the bracts change color, the temperature can be controlled between 15 degrees Celsius and 30 degrees Celsius.

Water and fertilizer management

In the seedling stage, water is only poured into the basin, and watering is only watered. In the process of magenta growth, as long as it is watered, it must be one time, not only half of it. The roots of plants grow to the bottom of the basin for sputum-fertilization. According to the proportion of 20 × 9 × 20 or 20 × 10 × 20, nitrogen, phosphate and potassium fertilizer were diluted to 200 times with water to dissolve in water. Then observe the growth of the plant, watering when there is a lack of water, and fertilizing each time. After the plant enters the vigorous growth period, the fertilization concentration can be increased to 600 times or 700 times. After the bracts were red and transparent, the fertilization concentration was appropriately reduced and diluted from 800x to 1000 times. During the whole growth process of "Rizhao", the pH value should be kept between 5.8 and 6.2.

Pest control is mainly based on prevention. Alcohol time insecticide is sprayed weekly and alcohol is sprayed every two weeks. The most prominent pest of Sunshine is whitefly, which has a long growing period. Whitefly takes only 7 to 10 days from egg to adult. Reproduction is faster, so the focus is on prevention. Seriously, only plants can be destroyed. In the spring seedling stage, growers also need to pay attention to mosquito larvae, because when the roots of seedlings are not strong enough, mosquito larvae will destroy the roots of seedlings. In this regard, a layer of lime can be sprinkled on the greenhouse floor to reduce the humidity of the greenhouse, inhibit the reproduction of pests, and spray conventional drugs.

"Sunshine" the most serious disease is Botrytis cinerea, the focus is to prevent, control greenhouse humidity, not too high, maintain good ventilation, when the disease occurs, with conventional medicine treatment. It is also necessary to pay attention to the production process to ensure that there is room for growth between plants and not to let the leaves touch each other. If it is too crowded, it will lead to plant growth.

Time: 2019-05-08 Click: