Why do the lotus leaves withered? Did you enter the dormant period? Is it a lotus blight? What is the difference between lotus blight and lotus rot disease? How to maintain and manage lotus flowers without dead leaves and growing into green leaves? Is it cut off? Is winter stored in the greenhouse? How to prevent pests and diseases? After the greenhouse is preserved, how should the depth of the water level be controlled?
Kang Lianping, Beijing Beihai Park, answered: I have summarized the following questions in three aspects. 1. Long-term daily management of lotus seeds should pay attention to matters. Potted lotus flowers in Beijing are generally planted in the middle of April to mid-April. When the soil is planted, the first time the water must be drenched, and then the soil can be dried for a few days and then watered, which can promote rooting. Keep the soil moist in the early stage. After 7 to 10 days, water can be watered from 1 cm to 2 cm deep. The floating leaves grow and the leaves expand. As the temperature rises, the water level can be gradually deepened until the basin is full.
Lotus light, hi-fer, hi-friendly environment. Therefore, its conservation site must be well lit, at least for 6 hours of direct sunlight every day. The lotus flower pot should be placed at a distance of at least 20 cm, which is convenient for ventilation, light transmission and vertical leaf growth.
Lotus fertilizer, in addition to the base fertilizer when planting, in the growing season to properly topdress. Generally, before the leaves are grown and the flower buds are not released, the topdressing is applied once, and the compound fertilizer is mainly used. The ternary composite granular fertilizer, the compound fertilizer tablet or the raw bean cake can be applied, and the package is applied into the center of the basin. 2 places can also be applied directly. Observe its effect, generally effective after three days, pay attention to thin fertilizer, such as leaves yellow or light green, and thin, is lack of fat, usually 10 days or so. If the leaves are thick green and thick, it means that there is no shortage of fertilizer, but it can not be pursued. Generally, it can be applied for up to three times in one growing season. The fertilizer is excessive, the cockroach is easy to rot, and the lotus leaf is dead.
How to prevent pests and diseases.
In the growing period, the common diseases of the lotus flower are brown streak disease, which mainly damages the vertical leaves, which is caused by the infection of the fungus Pseudomonas aeruginosa, and the other is spot blotch, which also damages the leaves, caused by the fungal leaf spot infection. The symptoms of the two diseases are very similar, and they are connected by plaques to form plaques, which make the mesophyll green and yellow. Generally, it is concentrated in the rainy season, mainly due to factors such as high temperature, high humidity, weak growth of lotus flowers, poor lighting and ventilation conditions. When it is more serious, it can be used for 800 times of zinc or thiophanate. Take prevention as the mainstay, remove the diseased leaves in time, and adjust the density reasonably.
Insect pests generally include aphids, chafers, and moths. The aphids are more powerful. They are more than 20 years old. They are clustered on leaves, petioles and young flower buds by nymphs and adults. They can suck the juice and kill them. Off. A small amount can be used to pinch or spray the leaves during daily watering.
Winter storage method.
In the Beijing area, the lotus flower is generally in a period of decline in the middle and late September. The leaves gradually turn yellow and dry, and the dry yellow leaves should be cut off in time to prepare for storage. The pool storage can be placed in the pool before and after the “Eleventhâ€. Water is injected to keep the water temperature under the ice layer of 0 ° C to 8 ° C for winter.
Cold storage in the late October to early November, put the potted water into the cold simmer, keep the temperature between 0 ° C and 8 ° C, keep the soil moist, you can safely winter.
The lotus is a perennial aquatic herb of the water lily. For the people to watch, Hualien, for the consumption of underground stems, is the lotus, and the lotus for human consumption. Here is the Hualien.
Ornamental lotuses can be divided into bowl lotus, cylinder (pot) and pool. Large lotus flowers can be planted in the cylinder basin or in the pond; some varieties can be plasticized and can be planted in small pots or in tanks.
The lotus flower is graceful and elegant, and it is one of the top ten famous flowers in China. Both the flower and the leaf can be seen. Her character, which is not stained with mud, is loved by people. The colors of the lotus are colorful, including red, pink, yellow, white, and complex colors. The number of petals can be divided into single-lobed, double-valve, double-valve, heavy-duty, and thousand-lobed.
The growth habits of lotus. In the growing season of the year, it can be divided into the process of sprouting leaves, flowering and fruiting, long scorpion and dormancy. From the end of June to the end of August each year, the lotus is open.
Lotus requirements for the environment:
Cultivation container: Since many bowls of lotus seed plants are still too tall, only a few varieties can be planted in large bowls. Glazed pots, porcelain pots and purple sand pots are ideal basins for lotus flowers, but such pots generally have bottom holes, so they should be blocked with cement yellow sand. For the caliber of the flower pot, the bowl lotus should be selected from a basin of about 26 cm to about 30 cm in diameter. For pots, the pot should be 30 to 45 cm in diameter, and the cylinder load should be larger.
The first lotus flower can be enlarged appropriately so that it is easy to flower. In short, the basin is bigger and the flowering is both good and good.
Venue: The lotus flower should be placed in a place where it can receive 7-8 hours of light per day, which can promote its flower buds and flowering. If the light is less than 6 hours per day, there will be little or no flowering. The lotus is a strong positive plant. When planting in a piece, the plants should be kept at a certain distance between the cylinders. Do not glory with each other.
Soil: The pH value of the soil where the lotus is planted should be controlled within 6-8, and the optimum pH is 6.5-7. It is best to use river pond mud or paddy soil for potting soil, or garden soil for vegetable land. But avoid using industrial contaminated soil.
The lotus flower is not resistant to fertilizer, so the base fertilizer should be less. The fattened river pond mud and garden soil can be used without the base fertilizer to avoid burning the seedling. This should be paid special attention.
Temperature: The lotus is a thermophilic plant. It usually begins to germinate at 8-10 °C, and the whip begins to elongate at 14 °C. The temperature required for planting is above 13 °C. Otherwise the seedlings grow slowly or cause rotten seedlings. At 18-21 °C, the lotus begins to draw the leaves, and the flowering needs to be above 22 °C. The lotus flower is very resistant to high temperatures, and it does not matter if it is above 40 °C.
Lotus cultivation techniques:
First, reproduction 1, seed reproduction: first of all to break the shell. From May to June, the end of the seed recessed is ground on the concrete floor or rough stone, soaking seedlings. To keep the water clear, change the water frequently, bud about a week or so, and root transplant after two weeks, one plant per pot, the water layer should be shallow, and the lotus leaf should not be submerged in the water. About 90% of the year can bloom, but there is not much flowering in the same year.
2, tiller breeding: from mid-March to mid-April is the best time to turn over potted plants. Premature planting will have the effect of cold current, and the seedlings are susceptible to freezing damage. When the northern part encounters cold current, it can be covered with transparent agricultural film. Before planting, the potting mud should be made into a paste. When planting, the top of the seedling should be inserted into the mud at a 20 degree angle along the edge of the pot. The bowl lotus is about 5 cm deep. The large lotus flower is about 10 cm deep and the head is low and high. The tail is half-turned and does not allow the tail to enter the water. After planting, place the pot in the sun and expose it to the surface, so that the surface of the soil will be slightly cracked, so that the seed and the soil are completely bonded, then add a small amount of water. After the bud grows, gradually deepen the water level, and finally keep 3-5 cm of water. Floor. In the early stage of pond planting, the water layer is the same as the potted water, and the latter is not submerged.
Second, daily management 1, water management: lotus is an aquatic plant, can not be separated from water during the growing period. In the early stage of growth, the water layer should be controlled at about three centimeters. The water is too deep to improve the soil temperature. If tap water is used, it is best to use a separate tank for one or two days. Summer is the peak of the growth of the lotus, and the basin must not be short of water. After entering the winter, the potting soil should also be kept moist to prevent the water from drying out.
2. Fertilizer management: The fertilizer of lotus is mainly phosphorus and potassium fertilizer, supplemented by nitrogen fertilizer. If the soil is more fertile, it is not necessary to apply fertilizer throughout the year. The decomposed cake fat, chicken, duck and goose feces are the most ideal fertilizers. Half pots can be applied in small pots. Only one or two can be applied in large pots. Do not apply more, and mix well with the soil. During the growth period, if the leaves are yellow and thin, you can use 0. 5 grams of urea per box to mix in the mud, smash into small balls of about 10 grams, apply one grain per pot, and apply it to the soil in the center of the basin for 7 days. Effective.
3, pest control: lotus flowers are mainly caused by corruption, leaf blight, but not too serious. If it is found that 50% thiophanate WP can be used to make 1000 times liquid spray. The insect pests of the lotus have damages such as thorn moths, aphids, snails, etc., and can be manually taken or killed with trichlorfon, dimethoate, quick-killing and killing. The family planted a small amount of lotus flowers, and the insects can be sprayed with all invincible agents.
4, winter management: After entering the winter, the pots can be placed indoors or buried under the frozen soil layer. In the north of the Yellow River, in addition to buried in the frozen soil layer, the agricultural film should be covered, and the soil should be kept moist throughout the winter.