What about the scorched edge of the leaves of Prunus mandshurica? topdressing nitrogen fertilizer / increasing watering / pruning in time

The elm leaf plum is a kind of evergreen plant with high ornamental value, but some flower friends will encounter the scorched edge of the leaf, which not only affects the beauty but also indicates poor growth, so what about the charred edge of the elm leaf plum leaf? Xiaomian Xiaobian will bring you to understand the reasons and solutions.

What are the characteristics of elm leaf plum

The leaves of Prunus mandshurica are usually oval and Obovate, with a length of 2-6 cm, the apex is short and then gradually pointed, there are 3 lobes, the upper surface is sparsely pilose or glabrous, the lower surface is pubescent, and the leaf color is usually green, so the focal edge is abnormal.

What about the scorched edges of elm leaves and plum leaves

There are many reasons for the occurrence of coke edge, but the direct reason is that the root system absorbs nutrients, and there are two reasons for this problem, the first is the poor development of root system, such as rotten root, root injury, and so on, and the second is the lack of water and fertilizer. So that the roots do not have enough nutrients to absorb.

1. Increase watering

[scorched edge reason]: if the water is too little or not watered for a long time, even if the elm leaf plum has a strong ability to withstand drought, resulting in a lack of water necessary for root growth, resulting in a scorched edge phenomenon in the leaves.

[solution]: what about the scorched edge of elm leaf plum leaves caused by less watering? The answer, of course, is to increase watering, which takes 3-5 days in summer and 7-10 days in spring and autumn, so that the soil is not too dry.

2. Topdressing nitrogen fertilizer

[Jiao Bian reason]: nitrogen fertilizer is the main component of chlorophyll in the leaves of Prunus mandshurica. If there is no nitrogen fertilizer, it will make the leaves lack nutrition, while the appearance of chlorophyll will make the leaves yellow and the edges scorch.

[solution]: nitrogen fertilizer should be applied after flowering to ensure exuberant plant growth and luxuriant branches and leaves, but attention should be paid not to excessive fertilization and timely supplement of phosphorus and potassium fertilizer in June.

3. Pruning in time

[scorched edge reason]: the vigorous growth of elm leaf plum is what flower friends want to see, but if it is too exuberant, it is not a good thing, for example, if the branches and leaves grow too fast, some branches and leaves will be too dense to penetrate the light, so that some leaves can not enjoy sufficient light, resulting in the phenomenon of scorched edges.

[solution]: when the branches and leaves are too dense, the elm leaf plum needs to be thinned, the weak branches and dead branches will be cut off, the light transmittance of the plant will be increased, so that each branch and leaf can enjoy sufficient light, and the focal edge phenomenon will be improved.

What is the elm leaf plum blossom language? when does the elm leaf plum blossom / blossom first and then grow leaves?

Elm leaf plum is a very special plant, it can not only have as many short twigs as elm, but also produce pink flowers like plum blossoms, and when many plants are still in their growing period, they are very popular because they are full of flowers in April, so what is the language of elm leaves and plum blossoms? When does the elm leaf plum blossom? Is the flowering period of elm leaves and plums long? The editor will answer for you one by one.

What is the language of elm leaves and plum blossoms?

As a common ornamental plant, what is the plum blossom language of elm leaves? The answer is bright spring, flowers and prosperity.

1. The language of flowers / the bright spring

Elm leaf plum likes the sun, so it is often cultivated in the open field in the sun, when it blossoms, the flowers shine with the sun, and it happens to be spring, the beginning of the year, so people later think that one of the elm leaf plum blossom languages is spring.

2. Hua Yue II / Flower clusters

When the elm leaf plum blossoms, its flowers will bloom before the leaves, although the flowers are small, but the number is large, they stand densely on the flower branches, there is a mood of flowers in the distance.

3. Hua Yu III / Prosperity

The pink flower after blooming does not mean that the elm leaf plum has withered, but indicates that its vitality has just begun to bloom, after the flower fade, it will slowly enter the period of vigorous growth, and the green leaves begin to sprout, so the elm leaf plum is not only beautiful after flowering, but also the meaning of prosperity.

When does the elm leaf plum blossom?

Elm leaf plum usually blossoms from April to May. Due to different climates, it blossoms earlier or later than plum blossoms, but earlier than most ornamental plants. Pedicel is generally 4-8 mm long, the shape of the flower is calyx tube wide bell-shaped, the color is pink.

Is the flowering period of elm leaves and plums long?

The flowering period of elm leaf plum is generally about 1 month, flowering in April, ending in May, and fruiting period from May to July. The flesh of the fruit is relatively thin, although edible, but the taste and taste are very general, so few people will specifically pick its fruit to eat, but its seeds have high value.

How to maintain the elm leaf plum after flowering

1. Pruning

After the flowering period of the elm leaf plum, it will begin to sprout, so after the flower fade, cut off the residual flowers and branches to avoid some pests that feed on flowers to target the residual flowers of the elm leaf plum. After pruning, the plum was watered and fertilized reasonably according to the breeding method of elm leaf plum to ensure its growth with sufficient nutrients.

2. Topdressing

After the flower fade, the branches and leaves begin to grow, so it should be topdressing after the flower fade, mainly nitrogen fertilizer, supplemented by phosphorus and potassium fertilizer, and then topdressing 1-2 times a month, taking the growth of elm leaf plum as a reference, if the growth is more exuberant, then fertilize once, if the growth is weak, topdressing once every 15 days.

How to raise family potted flowers and plants in summer? What should we pay attention to?

The light is suitable to prevent exposure.

Light is the energy source for flowers to produce nutrients, so many flowers can blossom and flourish only under sufficient light conditions. However, different flowers or different growth stages of the same flower have different requirements for light, so there are flower proverbs such as "Yin camellia, yang peony, half yin and half yang four seasons orchid".

Generally like the flowers with plenty of light, such as rose, pomegranate, sweet-scented osmanthus, Riley, plum blossom, peony, poinsettia, variegated wood, chrysanthemum, Dahlia, Milan, Prynne, Fusang, crape myrtle, kumquat, aquatic flowers, cactus, etc., after leaving the room in spring, they should be kept in a sunny place, but in the middle of summer, they should also be moved to a slightly shaded place to prevent strong light exposure.

Generally negative or strongly negative flowers, such as orchids, tortoise back bamboos, hanging orchids, asparagus, camellias, rhododendrons, ivy, masts, evergreens, begonias, brown bamboos, Phyllostachys pubescens, orchids, ferns and magnolia, etc., should be maintained in an environment with good ventilation and 50-80% shade in summer. if exposed to direct light, it will cause branches and leaves to turn yellow and even die. For this kind of flowers, it is best to put them on the balcony or windowsill facing east or north in summer, or to cultivate them in a well-ventilated place with bright scattered light; you can also use reeds or bamboo curtains to set up a shade shed and put the flowerpot under the shade shed for maintenance. in this way, the light intensity can be reduced to facilitate the robust growth of flowers.

Cooling and humidification pay attention to ventilation

Temperature is a necessary condition for the growth of flowers. Due to the long-term influence of the natural climatic conditions of the place of origin, different flowers have formed the unique optimum, highest and lowest temperature. For most flowers, the suitable temperature for growth is 20-30 ℃. The highest temperature in summer in most areas of China can reach more than 30C. When the temperature exceeds the maximum limit of flower growth, the normal life activity of flowers will be blocked, resulting in short plants, partial burns of leaves, reduction of flower quantity and shortening of florescence. Many kinds of flowers bloom little or not in summer, and the influence of high temperature on their normal growth is an important reason.

Tropical and subtropical flowers, such as Michelia, camellias, rhododendrons, orchids, etc., grow under warm and humid marine climate for a long time, and form special ecological requirements that like air and moisture in the course of their childbearing. It is generally required that the air humidity should not be less than 80%. If it can meet the requirements of air humidity in maintenance, it will give birth well; otherwise, it will be prone to poor growth, leaf margin drying, tender leaves scorching and so on.

Under family conditions, there are four main ways to cool and humidify in summer:

The main results are as follows: (1) during the normal watering in summer, according to the different requirements of air humidity of different flowers, spray water on the branches and leaves 2 or 3 times a day, and spray water on the ground of flowerpots 1 or 2 times at the same time.

(2) spread sand to cool the north or east balcony with a thick layer of coarse sand, then put the flowerpot on the sand surface, sprinkle water on the sand surface 1-2 times a day in the second season, and use the water contained in the sand to absorb heat in the air. the purpose of cooling and humidification can be achieved.

(3) A prefabricated board of hardwood or cement is used to cool the pool, put on the tank containing cold water, and then put the flowerpot on the board or cement board, add water once a day, and the water evaporates continuously after being heated, which can not only increase the air humidity, but also lower the temperature.

(4) put the flowerpot in the well-ventilated place with scattered light, spray clean water 1-2 times a day, and use electric fan to cool down.

Rational watering and proper fertilization

Summer temperature is high, evaporation is fast, plant transpiration is also strong, flowers need more water, so for most flowers, there should be sufficient water supply. As for how to control the amount of water in summer? It should be determined according to the type of flowers, the plant size and the actual dry and wet condition of the basin soil. General grass flowers themselves have more water content, transpiration intensity, watering should be more; general woody flowers can be watered less appropriately. Under normal circumstances, general flowers should be watered 1-2 times a day, never half waist water, otherwise the leaves will often curl and yellowing, for a long time, the whole plant will die.

It is best to use Rain Water to water flowers in summer, or dry tap water for 1 to 2 days first. Watering time is appropriate in the morning and evening, do not pour cold water at noon, because the temperature is very high at this time, the temperature outside can often reach about 40 ℃, not only transpiration is strong, but also water evaporation is fast, suddenly the cold water is excited, the foliar cells turn from tense to wilting, so that the leaves scorch, and when serious, it will cause the whole plant to die. This phenomenon is particularly obvious in some grass flowers. If in the early stage of flower bud gestation, flowering and fruit setting, cold water is watered at noon in summer, it is also easy to cause bud drop, flower drop and fruit drop phenomenon.

What needs to be specially mentioned here is: due to the high soil temperature in hot summer, it must be watered in time after the shower to eliminate the high humidity and muggy heat in the basin soil and reduce the basin soil temperature; the stagnant water in the basin after the rainstorm should be poured out immediately, or the basin soil should be pierced with bamboo sticks (do not hurt the root) to let the water flow out from the drainage hole at the bottom of the basin to avoid rotting the root.

When applying fertilizer to potted flowers in summer, we should grasp the principle of "applying thin fertilizer frequently". Excessive concentration of fertilizer is easy to cause rotten roots, generally exuberant flowers, about every 10-15 days to apply dilute liquid fertilizer. Fertilization should be carried out on sunny days and when the basin soil is dry. Because the root is easy to rot when fertilized in wet soil. The fertilization time should be in the evening after getting cooler. Water should be watered once the day after fertilization. The type of fertilization varies from flower to flower. Flowers that like acidic soil, such as camellias, rhododendrons, magnolia, maizi, Riley, etc., should not apply alkaline fertilizers, but should choose acidic or physiologically acidic fertilizers, such as calcium superphosphate, ammonium sulfate, ammonium nitrate and ferrous sulfate. When flowers enter the flower bud differentiation and bud stage, it is appropriate to apply more phosphorus and potassium fertilizer to promote more flowering. Flowers dominated by foliage should be fertilized with nitrogen fertilizer in order to promote the green color of leaves. Bulbous flowers, should apply more potash fertilizer, in order to enrich the bulb. For dahlias with large flowers and a long flowering period, it is necessary to apply an appropriate amount of complete fertilizer in the bud flowering stage in order to make all flowers blooming and beautiful. For the flowers that mainly watch the fruit, the fertilizer and water should be properly controlled during flowering, and sufficient complete fertilizer should be applied in the strong fruit stage, the fruit will be large and more.

During the maintenance of potted flowers, if it is found that the plants are short and thin, the branches are small, and the leaves are yellowish, which is the manifestation of lack of nitrogen fertilizer, nitrogen fertilizer should be added in time; if the plant grows slowly, the leaves are curled, the plants are short, and the root system is underdeveloped, which is mostly caused by phosphorus deficiency, fertilizers based on phosphate fertilizer should be supplemented. If the leaf tip of the leaf edge turns yellow (first the old leaf then the new leaf) and then turns brown and falls off, the stem is soft and easy to bend, which is mostly caused by lack of potassium, potash fertilizer should be applied.

Dormant flowers spend the summer safely

Some flowers, such as cyclamen, hanging golden bell, begonia, daffodil, geranium, taro, magnolia, freesia, paulownia, tulips, lotus flowers, etc., enter a semi-dormant or dormant state in the summer high temperature season, showing a decline or suspension of growth rate, in order to resist the harm of external adverse environmental conditions. In order to make this kind of flowers safely through the summer dormancy period, it is necessary to take corresponding measures to take meticulous nursing according to the physiological characteristics of their dormancy period. The main measures are:

(1) move dormant flowers to a shady and ventilated place after summer to avoid direct sunlight and rain, otherwise it will easily cause rotting roots or even death.

(2) watering should be strictly controlled. During dormancy, too much watering, basin soil for a long time wet, very easy to rot roots, watering too little, basin soil is too dry, and easy to make the root system atrophy. Therefore, watering is appropriate to keep the basin soil slightly moist. But often spray water on the branches and leaves and sprinkle water on the ground around the flowerpot to form a moist and cool microclimate, which is conducive to dormancy. However, for flowers such as paulownia with dense fluff on the leaf surface and cyclamen whose flower buds are sensitive to moisture, it is not suitable to spray water on the leaf surface or leaf center.

(3) stop applying any fertilizer. Because the physiological activity of flowers is very weak during dormancy, there is no need for fertilizer. If fertilized, it is also easy to cause rotten roots, rotten balls, and even the death of the whole plant.

Pruning and shaping to prevent overgrowth

After many flowers enter the summer, they are often easy to grow in vain, affecting their flowering and fruiting. In order to keep the plant shape beautiful and fruity, it needs to be trimmed and reshaped. Summer pruning is generally based on measures such as coring, wiping buds, removing leaves, thinning buds, thinning fruits and so on.

(1) pick some grass flowers, such as Begonia, Golden Bell, a string of red, chrysanthemum, Dutch chrysanthemum, early chrysanthemum, etc., and pinch off their tops when they reach a certain height to promote them to be more branched and bloom. Some woody flowers, such as kumquat, should also be heart-picked when the branches grow to about 15-20 cm in order to bear more fruit.

(2) in summer, many flowers often sprout adventitious buds from the base of the stem or branches, which should be erased in time so as not to consume nutrients and disturb the plant shape.

(3) to remove leaves, some foliage flowers should properly cut off old leaves and promote new leaves, then the leaf color will be more beautiful.

(4) Bud thinning, fruit thinning for flowers that are mainly ornamental, such as dahlias, chrysanthemums, roses, etc., excessive buds should be removed in time; for ornamental flowers, such as kumquat, pomegranate, bergamot, etc., when the young fruit grows to the size of soybean grains, the excess young fruit should be removed; for some flowers that cannot bear seeds or are not ready to collect seeds, cut off the residual flowers in time.

(5) plastic surgery for poinsettia, plum blossom, green peach, tiger thorn plum and other flowers, often bend each side branch in summer to make the plant shape plump and graceful.

Comprehensive management of disease prevention and pest control

High temperature and humidity in summer are conducive to the occurrence of a large number of diseases and insect pests. We should carry out the policy of "prevention first and comprehensive prevention and control" and do a good job in prevention and control in the spirit of "early treatment, small treatment and cure" to ensure the healthy growth of flowers.

The main results are as follows: (1) the common diseases in summer are powdery mildew, anthracnose, gray mold, leaf spot, nematode, bacterial soft rot and so on. Powdery mildew is mainly harmful to rose, plum blossom, peony, chrysanthemum, dahlia, begonia, melon leaf chrysanthemum, inverted golden bell and so on. After the damage, the plants were short, the tender shoots were curved, and the leaves were uneven or curled. Buds, leaves, shoots and buds, as if covered with a layer of white powder and grow many small black spots, serious leaves withered and withered, or even the whole plant died. Anthrax is mainly harmful to orchids, Magnolia, Milan, plum blossoms, rubber trees, cactus and so on. After most flowers are infected by bacteria, there are nearly round disease spots on the leaf surface, the edges are mostly purplish brown or dark brown, the center is light brown or grayish white, and the disease spots are often arranged with small black spots in the shape of wheels. The leaves withered and died when the disease was serious. Botrytis cinerea is mainly harmful to peony, peony, cyclamen, begonia, inverted Admiralty and so on. The damaged parts such as leaves, stems and flowers are brown or purplish brown rotten, gray mildew grows on the disease spot when the weather is wet, and the whole plant dies in severe cases. To prevent and cure the above three diseases, the following methods can be adopted: ① thoroughly remove dead branches and leaves in early spring, and timely cut off diseased schools, leaves, buds and so on, so as to reduce the source of bacteria; ② strengthens cultivation management, reasonable fertilization and watering, pays attention to ventilation and light, makes plant growth strong, and improves disease resistance; spraying 50% carbendazim or 50% thiophanate 500,800 times in the initial stage of ②.

(2) there are two kinds of common pests in summer: piercing and sucking mouthparts and chewing mouthparts. The former are mainly aphids, red spiders, whitefly, shell insects and so on. These pests often gather in leaves, tender stems, buds, branches and other parts, with needle-like mouthparts into the flowers to suck juice, causing leaves to turn yellow and curl, resulting in leaf yellowing and shedding. The prevention and control method can be sprayed with 1000-1500 times of dichlorvos emulsion. This medicine is easy to cause drug damage to plum blossom, cherry blossom, rhododendron, elm leaf plum and other flowers and trees, so these flowers and trees should be banned. The latter mainly includes moths, butterfly larvae, various beetles and underground pests. These pests nibble away at the leaves, bite the roots and wither the plants. The method of control is to spray 1000-1500 times of dichlorvos emulsion or irrigate the rhizosphere. High temperature in summer, volatile pesticides, coupled with high temperature when the human body's emission function is enhanced, the absorption of the skin increases, so the poison is easy to enter the human body and poisoning, so summer application, it is appropriate to move the flowerpot to the outside, in the morning and evening.