If you want to avoid the phenomenon of dead celery seedlings, how to do a good job in field manageme

Celery root rot mainly affects the root and stem base. The root system gradually begins to produce reddish-brown spots, gradually turning dark brown or dark brown, slightly depressed, and finally the taproot is completely rotten or necrotic, with few lateral roots. The leaves turn yellow and develop from the bottom up, the leaves do not fall off, the roots rot, and finally the plant dies.

If celery is exposed to high temperatures and rain in the late growth period, pests and diseases and man-made wounds are prone to root rot. This summer there were many rainy days, and root rot was common. In addition, low terrain, standing water, extensive management and continuous cropping of land can also lead to celery root rot.

Celery root rot fungus mainly overwinters with diseased residues or overwinters directly in the soil, and the seeds can carry the bacteria. During the celery growing season, the field is mainly spread by rainwater, irrigation water, insects and infected fertilizers, and repeated infections. Root rot bacteria are mainly infected from wounds and orifices.

Choose disease-free seeds or sow seeds in areas where disease is not occurring. If it is not a disease-free seed, it can be picked with salt water, and the sclerotia in the seed will be soaked out. When there is a foreign object on the surface of the water, it will be the sclerotia of the seed.

At this time, the seeds are removed, washed with water, dried, and sown, which can effectively prevent celery sclerotinia disease. Reasonable control of planting density, too dense planting density will lead to poor permeability in the field, dead seedlings. Seedlings should be thinned immediately after emergence to prevent mutual covering.

If there is too much water in the fields, it should be drained in time, and the sick and disabled bodies should be removed and taken out of the countryside. Be careful not to hurt the celery roots when loosening the soil and weeding, reduce some human injuries, and turn the soil deep and disinfect it in time after harvesting to kill the germs in the soil and reduce the occurrence of pests and diseases.

Pay attention to the diseases of celery, generally soft rot, black rot, sclerotinia sclerotinia and so on. Mainly focus on prevention, strengthen seed inspection and disinfection. Since diseases are mostly caused by fungal diseases, the law and time of disease occurrence should be explored, so as to make corresponding preparations at the onset of diseases, which generally directly harm the roots, stems and leaves of crops.

To control celery yellow leaves, excellent celery varieties and fertile soil should be selected. When planting, it is necessary to water and fertilize reasonably according to the growth characteristics of celery, and do not use organic fertilizer that does not decompose, but overwater.

Personally, I think that if you want to avoid the phenomenon of dead celery seedlings, the management of the field must be particularly important, it must be reasonable and sufficient, and it must be scientific.

First of all, it should be watered and fertilized on time, and the seedlings must not be pulled out to help them grow and ignore them, and secondly, it is necessary to use scientific and reasonable methods to cultivate celery, only in this way can the phenomenon of dead seedlings be avoided.

Strengthen pastoral management and select plots of land on higher ground for planting; The planting time should be before 9 a.m., and the ground should be watered halfway through planting. Watering once every 4-5 days, 4-5 times in a row, pay attention to reasonable dense planting, timely drainage after rain, prohibit flood irrigation, apply plantar fertilizer, and pay attention to fertilizer and water management during growth; Remove diseased leaves and stems in time; Timely insect control, reduce insect wounds, etc. When celery is planted, it can reduce the number of pathogens, prevent the occurrence of diseases, and provide a good growth environment for celery growth.

During the planting period, if the plant is found to be diseased, the use of microbial agents for root irrigation in the early stage of disease can enhance the ability of crops to resist stress and disease, and inhibit root rot disease and the phenomenon of heavy stubble and dead trees.

First, celery seeds should be treated aseptically, and mixing the seeds with medicine and then sowing will enhance the disease resistance of the seeds; Second, do not plant too dense when sowing, and drain water in time after rain to prevent excessive humidity and infection of germs; Third, if a diseased plant is found, it should be pulled out immediately and sprinkled with quicklime to kill the virus.

Pay attention to the diseases of celery, the diseases of celery generally have a series of diseases such as soft rot, black rot, sclerotinia and blight, etc., mainly a prevention, strengthen the inspection and disinfection of seeds. Because most of the diseases occur due to fungal diseases, explore the occurrence law and time of the disease, so as to prepare accordingly at the onset time, and the disease is generally directly harmful to the rhizomes and leaves of crops. This has led to a drastic reduction in production or even a halt in production.

Because the soil contains too many nutrients, or the soil is too dry and does not have enough water, it is necessary to always pay attention to celery.

The problem of dead seedlings is likely to be that the water is not enough in the process of planting, and if you want to avoid this problem, you should water it in time and pay attention to the light, which is a very important point.

The temperature of celery growth and development is around 20, and it is very important to control the temperature through ventilation in the later stage. Celery has a long growing period, high yield, and a large amount of fertilizer, so it is best to apply a base fertilizer that decomposes organic fertilizer when planting. Throughout the growing season, water once every 3 to 5 days so that the ground is not exposed.

When the celery grows to about one, it should be watered once, rinsed with chemical fertilizer, a small amount many times, and then rinsed with high potassium fertilizer 2 3 times in the later stage, which is conducive to the coloring and strengthening of celery. In the growth period of celery, the leaves should be picked 2 or 3 times, the old leaves and diseased leaves at the bottom should be removed, the leaves with small weight at the bottom should be removed, and fungicides should be sprayed after picking the leaves to prevent diseases.

Soak the seeds in water for 12 24 hours, rinse them with water, grind off the skin, dry the surface moisture of the seeds, wrap them in a damp cloth and put them in the refrigerator. 5 After 15-16 hours of low temperature treatment, germinate indoors and keep it moist. When 50% of the seeds have germinated, they are planted.

Water is poured over the soles of the feet first, and the seeds are sown evenly to a depth of centimeters. The seedbed should be appropriately enlarged, the bottom water should be watered thoroughly at one time, the soil should not be too thick, and the seeds should not be exposed. After about 10 days of sowing, the seedlings will come out completely, remove the plastic film, and keep the soil moist.

Prevent and control virus diseases, aphids, leaf miners and other pests and diseases at any time.

It is susceptible to drought and lack of fertilizer, which affects growth and development, increases fiber and reduces quality. In case of drought, water every 2 to 3 days. Watering in the morning and evening to keep the soil moist, promote the vigorous growth of celery, reduce the ground temperature, and form a microclimate conducive to the growth of celery.

In case of heavy rain, it should be drained in time to prevent waterlogging, and in case of hot rain, it should be watered in time to cool down the cool well water, increase the oxygen content in the water, and prevent the hot rain from suffocating the plant roots. Timely top dressing should be carried out throughout the growing season. Top dressing should be based on the principle of dividing a small amount, every 10 15 days with urea or compound fertilizer 10 12 kg per mu, can be washed to 15 20 days before the harvest period to stop fertilizing.

Avoid using human manure, urine and other farm fertilizers during the celery growing season, otherwise it will cause heart rot or root rot. At the beginning of growth, tillage can be carried out once or twice. Cultivation should be shallow so as not to damage the roots or stems and leaves.

Combined with cultivating, pull the grass in time to avoid the grass pressing the seedlings.

In addition to the application of plantar fertilizer, it is also reasonable to top dressing according to the growth of celery and soil conditions. One week after planting, top dressing once every half month, 20 kg of urea and 15 kg of diammonium phosphate per mu were applied. Water every 4 days to keep the soil moist.

To facilitate storage, stop watering a week before harvesting. After 2 to 3 weeks of planting, celery enters the slow seedling stage, at which time the amount of watering should be reduced. About a month after the slow seedling stage, the growth rate slows down.

In order to avoid soil compaction, cultivation and weeding should be carried out to ensure that a small amount of water can penetrate into the soil, improve the permeability of the soil, and promote the root development of celery. Remove some grass so as not to affect the normal growth of celery, and leave some grass for celery shade.

After the summer celery grows 5 or 6 leaves, the growth is accelerated, and the management should be mainly promoted, and the seedlings are generally not squatted. In the high temperature and dry season, it is advisable to cover shade nets to cool and moisturize, which is conducive to growth, reduces fiber, and improves quality. Top dressing should master the principle of a small amount of many times, and each application should not be too much.

It is advisable to apply nitrogen fertilizer and well-rotted light pig manure, and other organic fertilizers should not be applied. When the plant grows, top dressing can be combined with watering. In summer, the temperature is high, and it is necessary to keep the soil moist frequently, which is conducive to the vigorous growth of celery.

In the event of pests and diseases, they should be prevented and controlled in time. Stop watering manure and spraying pesticides 10-15 days before harvesting.

Sow early at the right time. It generally takes about 55 days from sowing of summer celery to the emergence of seedlings to harvesting and marketing. In order to increase the yield and value of celery, it is required to sow by July 20 every year when the celery is harvested from late September to around the National Day.

Celery should be weeded and fertilized so that it can grow better.

After planting for 10 to 15 days, apply 1 light decaying manure to promote the growth of seedlings. After that, every 15 20 days, top dressing 1 time mock guess, a total of 4 5 yards. In the middle and late stages, large water and fertilizer should be used to promote the vigorous growth of stems and leaves, so as to facilitate high quality and high yield, especially in the first 20 30 days of harvest, to strengthen fertilizer and water management to prevent hollowing, and it is advisable to add urea to rot and clean manure water, and apply urea 5 6 kg and potassium fertilizer per 667 square meters each time, and it is strictly forbidden to use nitrate nitrogen fertilizer.

Do not pour on the heart leaves when topdressing to prevent contamination.

The light problem of celery should be increased, and attention should also be paid to watering, and attention should be paid to pests and diseases, so that good field management can be done.

It is necessary to check the situation in the field regularly every day, and then pay attention to the time of fertilization and watering, so as to be able to do a good job in field management.

To fertilize the ground, choose relatively strong seedlings when planting, apply some nitrogen fertilizer in the early stage of growth, and supplement some phosphorus and potassium fertilizer in the middle and late stages.

Celery is a shallow root crop, like fertilizer but weak ability to absorb fertilizer, need to be topdressed in the growth stage of celery according to the growth stage of celery and soil fertility, in order to achieve the purpose of good growth and high yield, generally dead seedlings are caused by root rot You can directly use Haowanjia soil disease ** to irrigate the roots, in addition to less than timely drainage.

Celery seeds have a long dormant period, and the seeds that pass the dormant period germinate properly for 7 to 10 days, and it is difficult to germinate after 25. As a result, the germination rate of autumn-sown celery in summer varies greatly. Control the temperature during germination or live streaming.

In summer, there is a shortage of shade work. Long-term prevention with white purity can promote the improvement of disease resistance in celery throughout the farrowing period, reducing the occurrence of diseases by more than 60%. In the later stage, even if a small part of the old socks occurs, the above drugs can be used to prevent them in time, and it is not easy to develop drug resistance.

Low temperatures and long days promote bud differentiation, so spring broadcasts are prone to unripe sprouting. High temperature and strong light during the vegetative growth period of celery will increase the fiber content of tung tree, resulting in poor quality. After planting, it is necessary to water enough planting water, which will survive in about 4 days, and new leaves will germinate in 7 days, so as to keep the soil moist as much as possible to prevent drought.

If there is a lack of fertilizer in the later stage, when the foliar surface is yellowing, potassium dihydrogen phosphate or urea should be sprayed on the leaves to promote development.

This technology is not always developed, and the sense of science and technology is also very strong. Water and fertilizer management requires timely watering, and fertilization should also be decided according to the fertility of the soil and the nature of the soil.

We should first keep the soil moist, and when the temperature is high, we should water more, and we should plant some nutritious fertilizers, so that we can.

Celery is more suitable for growing in a cool and humid environment, the seeds of celery are small, the emergence of seedlings is slow, the seedling stage is long, the absorption capacity is weak, and the requirements for soil moisture and fertilizer nutrients are relatively strict.