What is the management technology of slow seedlings after watermelon transplanting?

The management techniques of slow seedlings after watermelon transplanting are as follows:

1. Reasonable temperature control.

Watermelon seedlings have poor cold tolerance, and if you want them to pass the slow seedling stage faster, you need good temperature control to resume growth. Normal hair roots require a low temperature of 18 degrees. If the temperature is too low after transplanting, it is recommended to cover it with plastic film to control the temperature and keep warm and increase the soil temperature.

If the soil temperature does not reach 15 degrees, it is difficult to slow down the seedlings and germinate new roots.

Second, scientific top dressing.

When transplanting watermelon seedlings, the base fertilizer is usually applied, and the fertilizer must be rotted organic fertilizer, and the base fertilizer must be fully mixed with the soil evenly. If the root system comes into contact with fertilizer with too much concentration or fertilizer that is not well decomposed, it is easy to burn the roots, and there will be delayed seedlings or dead seedlings.

3. The transplanting time is appropriate.

The normal transplanting time for watermelons is at the four-leaf stage. If the watermelon seedlings are too small, the growth is small, and the adaptability and resistance to the outside world are poor, the seedling slowing speed will be slowed down. Seedlings above the five-leaf stage are easy to hurt the roots, and it is not good for slow seedlings.

Fourth, reasonable watering.

When transplanting watermelon seedlings, you should also pay attention to the watering method. Before transplanting, you can water to ensure that the seedbed is moist, which can maintain the health and integrity of the root system. After transplanting, under the condition of controlling the ground temperature, the soil should also be slightly wet, but there should be no stagnant water, just a little moist.

Precautions for watermelon transplanting

1. Do not transplant seedlings.

The best time for watermelon transplanting is the four-leaf stage of watermelon. Because of the small growth of seedlings, poor adaptability and resistance to the outside world, slow seedlings, easy to be attacked by diseases, and even seedlings die. Transplanting above the five-leaf stage, because the root system has been formed, it is easy to hurt the root system during transplanting.

2. Do not overdry the seedbed.

The seedbed should control the temperature and not the water before transplanting, and if the soil is too dry during transplanting, it is easy to scatter and hurt the root system. After transplanting, under the condition of maintaining the ground temperature, the bed soil should be pressed tightly by watering.

1. Temperature and humidity control.

One week after transplanting is a critical period for slowing down seedling growth. Watermelon seedlings are sensitive to temperature and humidity. When the temperature is too high or too low, it is not suitable for the growth of watermelon seedlings, and when the humidity is too high, it is easy to cause various diseases.

Attention should be paid to ventilation, moisture and heat when planting in greenhouses; Pay attention to the trenching and drainage of watermelons in the open air.

2. Water and fertilizer control.

Water control: There is little rain in autumn and winter, the climate is dry, and the land is prone to water shortage; However, as the temperature drops, so does the soil temperature. If a large amount of water is used at this time, it is easy to cause the soil temperature to drop too quickly. Therefore, too much water should not be watered.

Fertilizer control: Watermelon likes fertilizer but is not fertilizer tolerant. Too high fertilizer concentration can easily cause damage to the root system of fertilizer, cause root burning and rot, and cause seedling wilting and seedling death.

3. Promote root growth and early seedling development.

Root promotion: The first task after transplanting is root promotion. The nutrients needed for growth in the current year are mainly absorbed by the new roots. The development of new roots determines the yield, quality and longevity of the plant during the year. Calcium is the main element in capillary root development, and calcium supplementation can promote root development.

Watermelon cultivation and management:

1. Plough the field.

If you want to grow watermelons, you must first start with the selection and preparation of the field. It is best to choose a sandy soil with loose and breathable soil, strong drainage ability, and no accumulation of excess water, and it should be thoroughly deepened before the official start of cultivation to remove debris and stones and apply a certain amount of base fertilizer.

2. Treat the seeds.

Before planting watermelons, we need to do some catalytic work for the seeds of watermelons to help them germinate faster. The skin of watermelon seeds is very hard, so the germination rate of watermelon seeds will be very low, soak it in warm water at about 40 degrees Celsius for 20 minutes, which can significantly improve the germination rate.

3. Control the temperature.

Watermelon seeds need to maintain a stable temperature for a period of time after planting before they can take root and germinate normally, grow and grow, so in its germination and seedling period, it is necessary to ensure that the ambient temperature of the planting site is stable at about 30-35 degrees Celsius, and then maintain a temperature difference of about 10 degrees Celsius after entering the maturity period.

1. Moisture: Before sowing, water enough, if there is a lack of water, choose to water in the morning when the sun is better, pay attention to ventilation after watering, prevent and control the seedbed humidity is too large, and increase the occurrence of pests and diseases.

2. Light temperature:

Ensure good light conditions, the temperature is controlled at about 22°C during the day and about 16°C at night. About a week before transplanting, the temperature should be lowered appropriately to enhance the ability of seedlings to adapt to the environment.

3. After planting: After the seedlings are planted, the underground flush fertilization with its own nutrient biological bacteria is abundant, which is rich in organic matter and secondary metabolites of the bacteria, eliminates harmful bacteria, improves the soil, supplements organic nutrition to the roots, promotes rooting, and at the same time raises the roots and protects the roots, so that the watermelon returns to the seedlings quickly and grows well.

At the same time, foliar spraying of organic acid boron calcium foliar fertilizer, calcium and boron supplement, promote flower bud differentiation, improve the survival rate of watermelon. Use it several times throughout the whole process to effectively prevent fruit cracking in the later stage.

1. Temperature control: watermelon seedlings are sensitive to temperature, suitable for growing at a temperature of 16-22 degrees Celsius, in the breeding process, the temperature can not be lower than 15 degrees Celsius, and when the temperature is low at night, the roots of watermelon seedlings should be covered with straw. After transplanting, the temperature of watermelon seedlings must be well controlled, if the temperature is not within this range, the growth of watermelon seedlings will be inhibited.

2. Scientific watering: After watermelon seedlings are transplanted, the demand for water is relatively large throughout the seedling period, so it is necessary to ensure sufficient water during the management period, but the amount of water should be controlled, and water accumulation in the soil should not occur, otherwise the melon seedlings are easy to rot and seriously hinder growth. When the weather is hot, you can water the watermelon seedlings once a day with a small amount of water, and if the soil is moist, you don't need to water it again.

3. Reasonable top dressing: the primary task of watermelon seedlings after transplanting is to promote roots, so it is necessary to apply calcium-rich fertilizers to them, calcium can promote the development of watermelon seedlings roots, and bean dregs, egg liquid or rotten eggshell water can be added to the soil. Watermelon seedlings like fertilizer but are not tolerant of thick fertilizer, if you want to give it top dressing, you must control the concentration of fertilizer.

If the fertilizer concentration is too high, it will cause damage to the root system, and it is easy to burn the roots, which will cause the root system to rot, causing the seedlings to wilt and even die. It is best to use nitrogen, phosphorus and potassium fertilizer for top dressing, which can promote the faster growth of watermelon seedlings. Fertilization should be carried out after the five-leaf stage of watermelon seedlings, and too early fertilization will easily lead to fertilizer damage.

4. Keep ventilation: A good ventilation environment is the key to the growth of watermelon seedlings, and when the weather is fine, you can uncover the membrane cloth to make the rhizomes breathe fresh air. Watermelon seedlings can grow vigorously in a well-ventilated environment.

If it is in a poorly ventilated, hot and humid environment for a long time, it is easy to cause melon seedlings to rot and easily breed bacteria. If it is cultivated in a greenhouse, you must pay attention to ventilation and often lift the plastic film for ventilation.

5. Proper light: watermelon seedlings can not leave the light during the growth period, and it is necessary to let it bask in the sun and astigmatism, and sufficient light can promote its vigorous growth. When the sun comes out, the straw curtain should be lifted, bask in the sun more, and the strong light at noon can be properly blocked, and do not expose to the sun for a long time.

1. Water management: watermelon seedlings have a large demand for water, so they should be watered frequently, but there should be no stagnant water. 2. Strengthen ventilation

Ventilation should be strengthened to ensure air circulation, and it should not be left in a stuffy environment. 3. Temperature management: watermelon seedlings can grow vigorously in the environment of 16 22, and the temperature needs to be well controlled.

4. Reasonable top dressing: it likes fertilizer, but is not tolerant of thick fertilizer, and the compound fertilizer is applied in the five-leaf stage. 5. Proper light seeing:

Get more sun and astigmatism.

After transplanting the watermelon seedlings, it is necessary to water the watermelon seedlings properly, and fertilize them after three or four days, so that the watermelon seedlings can grow better and the watermelon seedlings can be scientifically managed.

After transplanting, you must water more and fertilize more, and secondly, you should also pay attention to the comfort of the soil, do not destroy the roots, and at the same time you should get rid of the surrounding weeds, and you should also pay attention to the temperature and humidity of the environment.

After transplanting, it is necessary to replenish water, observe for two days, and confirm that you can continue planting, otherwise it is easy to die.

After transplanting, watermelon seedlings should be well managed, ventilation and temperature management, so that watermelons can grow better.

Generally start to raise seedlings around the Spring Festival, start transplanting and planting in March, slightly different in different regions, robust seedlings have a direct impact on planting survival, flowering and fruit setting and yield, but the temperature is low before and after the Spring Festival, rainy and snowy weather, and the light is weak, which is not conducive to the growth of seedlings.

When managing watermelon seedlings, first of all, we must inhibit watering, because when watermelon is in the seedling stage, the demand for water is very high, and it is necessary to maintain the moisture of the cover, so that the watermelon seedlings can grow better, but the embankment can not let the soil form a waterlogged condition, followed by maintaining good ventilation, so that the watermelon seedlings can grow better, and finally when managing watermelon seedlings, the temperature must be suppressed, and it is best to keep the temperature between 16 degrees and 22 degrees. In this way, it is conducive to the growth of watermelon seedlings.

Precautions for watermelon seedling transplantation

Watermelon seedling transplanting should be carried out in the morning in continuous sunny weather, try to increase the ground temperature, promote the rapid growth of melon seedlings and slow down the survival of new roots, if the seedlings are planted in low temperature weather or encounter continuous low temperature weather after planting, it is easy to lead to watermelon roots or stiff seedlings. Generally, it can be planted at a ground temperature of 10 cm and above 15.

The planting depth of melon seedlings is about 1 cm in the soil on the surface of nutrient soil quietly, too deep soil heating and poor air permeability, too shallow and not easy to moisturize, which will affect the development of watermelon roots, resulting in slow growth of watermelon, and the grafting interface should be at least 1 2 cm higher than the ground when grafting seedlings are planted. Planting too deep makes the hypocotyl of watermelon noisy and partially touches the soil and produces self-rooting, which makes the grafting meaningless.

1. Suitable temperature: After transplanting watermelon seedlings, the ambient temperature should be kept between 16-22 degrees, and a greenhouse should be built to keep warm when the temperature is too low. 2. Watering water:

After transplanting, watermelon seedlings should be watered once with rooting water, and then watered after the seedlings were successfully slowed in the later stage. 3. Supplementary nutrients: no fertilizer is applied after transplanting, and compound fertilizer is applied after the watermelon seedlings grow five true leaves.

1. The temperature is suitable

Watermelon seedlings are suitable for growing in a warm environment, after transplanting, the ambient temperature should be kept between 16-22 degrees, when the temperature is too low, use plastic film and bamboo strips to build an arched greenhouse to keep warm, and when the temperature is too high, spray water mist regularly around to reduce the temperature of the environment.

2. Watering water:

Watermelon seedlings have a greater demand for water, in the process of breeding, to the roots after transplanting to water the root water, moisten all the soil, and in the process of watering, it is best to use pollution-free river water, lake water, reduce the use of tap water, so as not to affect the chlorine watermelon seedlings to adapt to the environment.

3. Supplement nutrients

Watermelon seedlings like fertilizer, avoid thick fertilizer, do not need to fertilize it in the early stage of transplanting, so as not to cause fertilizer damage to the plant, waiting for the transplanted watermelon seedlings to grow five true leaves, you can apply diluted compound fertilizer to promote plant growth, and fertilizer should be applied directly into the soil to avoid watermelon seedlings contact fertilizer and burns.

Hormone-free rooting agent + microbial agent containing 2 billion bacteria can be used to increase the seedling slowing speed.

Watermelon fertilization technology.

1. Base fertilizer The application method of watermelon base fertilizer has various forms of sprinkling, furrow application and hole application. Generally, 1-ton of farmhouse fertilizer or 150-200 kg of Zhongyi biological fertilizer is applied per mu, and mixed with Yanwo biological fungicide, and evenly raked into the soil.

2. Top dressing The number of watermelon top dressing varies greatly according to different planting methods and different regions. The number of topdressing in the dry melon area is less, and the number of topdressing in watered melon is more. Generally, when the seedlings grow 2 true leaves (direct seedling) or slow seedlings (transplanting seedlings), the first top dressing is carried out, and an arc-shaped shallow ditch is opened at a distance of 15cm from the seedlings, and each plant is applied with water-soluble fertilizer as seedling fertilizer.

When the melon seedlings are pumped, the ditch is fertilized between the plants or on the back side of the plant (in the opposite direction to the vine), and each plant is fertilized with water-soluble fertilizer.

When the diameter of the young fruit is about 5 cm, then the ditch is applied with water-soluble fertilizer and high potassium fertilizer per mu, and when the diameter of the young fruit is 10-15 cm, the water-soluble fertilizer and high potassium fertilizer are applied per mu. From the expansion of young fruits to the ripening of fruits, Yanwo potassium dihydrogen phosphate and Yanwo calcium fertilizer can be sprayed 2-3 times respectively to increase the yield and improve the quality of watermelon.

Summary. Hello, 7 days after grafting is the wound healing stage, and the proper management of this period directly determines the survival rate.

Hello, 7 days after grafting is the wound healing stage, and the proper management of this period directly determines the survival rate.

In this period, we should focus on the regulation of temperature, humidity and light. During the wound healing period, the temperature of the shed should not exceed 35 during the day and 15 at night.

The humidity in the shed should not be too large or too small, and when it is too wet, dew will be formed on the cotyledons, and it will easily cause disease and water decay when it drips to the grafting joint; If it is too dry, it will affect the wound healing and is not conducive to slowing down the seedlings. In the morning, when the shed temperature reaches 20, the shed film on the small arch shed is uncovered in time to drain moisture, and when the shed temperature rises to 27, the shed film is put down in time to moisturize.