For high yields, when is it appropriate to water open field vegetables to grow them?

The best time to water the ground is before 8 o'clock in the morning on a sunny day, the advantage is that after a night of cooling the ground temperature has dropped to the last point, then the watering is just the same as the ground temperature, and at 9 o'clock in the morning, as the temperature rises, the ground and the water are synchronously warmed, so that the crops will not be harmed and will not get downy mildew. The harm of watering at night is because the surface temperature of the ground is too high when exposed to sunlight for a day, and there will be a conditioned reflex on the ground when cold water is cold, and there will be fog-like humidity at night, which will cause damage to plant leaves after rising, especially beans and cucumbers will get downy mildew, which is summarized through practical verification.

Of course, you can't water the wintering blindly and you can't always water it big. If the vegetables are pickled for too long, it will affect breathing, but it will affect growth, and yellow seedlings will appear. Generally, when the soil moisture reaches about 60%, we don't need to water it.

Therefore, our wintering water is watered early or late, which has an impact on the growth of vegetables. It must be determined by the soil moisture of the roots.

So when is the overwintering water watered?

Family members are advised to be optimistic about the weather forecast. When the average daily temperature reaches around 7-8 during the day and below zero at night, watering begins about 5 days before the complete closure in winter. In other words, the best time to water is when it freezes at night and melts during the day, which not only increases the temperature of the soil, but also ensures the safety of winter vegetables.

There is also a question that our farmer friends are more concerned about, that is, whether to use chemical fertilizer when watering winter water? Like our wheat, some urea is added when watering the overwintering water. This urea is not used now, because the temperature is low, and the urea cannot be converted.

After the end of the year, when the temperature rises, urea also begins to play a role, which helps wheat to regreen.

If our vegetables are not growing well, we can use fertilizer to water them to promote growth. It is recommended that farmers water ammonium sulfate or compound fertilizer at the same time, which is conducive to improving the quality and yield of vegetables. Conditional family members can also cover the frame with a layer of organic fertilizer after watering to protect against the cold.

You can choose to water it at night. This is because it can absorb the water at this time, and it will not be evaporated by the sun.

You should choose watering when germinating, you must water evenly when watering, and then you must clean up the stagnant water in time, and you can spray some pesticides appropriately.

It is more suitable for watering in the middle of the morning and in the middle of the afternoon, which can have a particularly good effect and achieve high yields.

Summary. Dear, hello how to water vegetables in the open field in winter, 1, watering the sunny and not watering the yin "watering the sunny day without watering" is watering on a sunny day, not watering on a cloudy day, the specific time should be selected according to different weather conditions, to strictly abide by the watering on sunny days, less watering on cloudy days or not watering, rain and snow days should not be watered principle, especially in cold snaps and snowy weather, should try to avoid watering during this period, so as not to cause the ground temperature to drop and cause vegetables to die, or cause the air humidity in the shed to increase, resulting in the occurrence and spread of diseases. 2. Watering small is not large, the temperature is low in winter, and the water demand of vegetables is also small, so the number of watering times should be small, the amount of watering should be small, and large water flood irrigation can not be carried out.

In general, it is interlaced with small watering, and the amount of watering is only half of that in summer, "such as overwintering cucumbers, you can water in alternate rows, watering twice in small rows, watering once in large rows, and irrigating in turns." At the same time, it can also reduce the effect of watering on the ground temperature. ”

Dear, hello how to water vegetables in the open field in winter, 1, watering sunny and not watering yin "watering sunny and not watering" is watering on sunny days, cloudy days without watering, the specific time should be selected according to different weather conditions, to strictly abide by the principle of watering on sunny days, less watering or no watering on cloudy days, rain and snow days should not be watered, especially in cold and snowy weather, should try to avoid watering during this period, so as not to cause the ground temperature to drop and cause vegetables to die in the mountains and change, or cause the air humidity in the shed to increase, resulting in the occurrence and spread of diseases. 2. Watering small is not large, the temperature is low in winter, and the water demand of vegetables is also small, so the number of watering times should be small, the amount of watering should be small, and large flood irrigation can not be carried out. In general, it is interlaced to water small water, and the amount of watering is only half of that in summer, "such as overwintering cucumbers, you can water in alternate rows, water the old water twice in small rows, water once in large rows, and take turns to irrigate."

At the same time, it can also reduce the effect of watering on the ground temperature. ”

3. The watering temperature should be preheated in the shed first, and the water temperature should be poured when it is close to the ground temperature, and the water temperature should not be lower than 12. Can not directly use river water, reservoir water and pond cold water irrigation, after watering, close or even close the vent, so that the temperature in the shed reaches more than 30, and stable for 1-3 hours. 4. Watering dark and not watering bright winter greenhouse vegetables should insist on dark irrigation under the film, or micro-irrigation under the film, which can effectively prevent the evaporation of ground moisture, reduce the air humidity in the shed, and prevent the occurrence of diseases.

The use of micro-irrigation has a positive effect on the balance and coordination of water, fertilizer, gas and heat required for vegetable growth, especially in the early and middle periods, which is conducive to promoting root control of locust seedlings, controlling the air humidity in the shed, reducing the occurrence of pests and diseases, and at the same time, it can also effectively control the amount of water, reduce the loss of water and fertilizer in the deep seepage, improve the soil structure performance, promote the growth and development of crops and improve the quality of vegetables.

The main vegetable varieties suitable for spring open-field cultivation are: 1 spring green onion seedlings in early to mid-March, no cutting in spring, planting in the field after wheat harvest, frost harvest. 2 Small arch shed or mulch film, melon in mid-March Yangqi seedlings, planted in early April or planted on the mulch after April 20.

3 Eggplant fruits (eggplant, peppers, tomatoes) Seedlings are raised in early to mid-March, planted in the open field in late April, and harvested after wheat harvest. 4 early spring zucchini seedlings can be raised in early and mid-March, and can also be seeded around April 10 with about 1,500 plants per mu, and melons can be produced before wheat harvest. 5 spring beans are generally not seedlings, the use of mulch film live seeding, sowing time in April 10 before the feast, the amount of seeds per mu is 1 7 2 kg, 4000 holes per mu, 3 seeds per hole, no seedlings.

6 Spring radish or spring radish The yield of spring radish or spring radish is not high, but it is not low, generally in early March, small arch shed live broadcast, late May and early June. In addition, there are small vegetables such as rape, spinach, and wormwood, and winter melon, pumpkin, celery, etc. Excerpt from:

2008．02．04．0...Varieties of open-field vegetables suitable for spring planting: Now that spring has entered, some vegetables and vegetables are about to start seedlings or sowing, but open-field vegetables are "short legs" and have less production.

There are many places where vegetables are commonly used, such as green onions, eggplants, leeks, tomatoes, etc., most of which are purchased from other places. Because of this, the planting of open-field vegetables has a large market demand and high profit margins. The main vegetable varieties suitable for spring open field cultivation are:

1 spring green onions in early to mid-March seedlings, spring do not cut, wheat harvest after planting in the field, frost harvest. 2 Small arch shed or mulch film, melon in mid-March Yangqi seedlings, planted in early April or planted on the mulch after April 20. 3 Eggplant fruits (eggplant, peppers, tomatoes) Seedlings are raised in early to mid-March, planted in the open field in late April, and harvested after wheat harvest.

4 early spring zucchini seedlings can be raised in early and mid-March, and can also be seeded around April 10 with about 1,500 plants per mu, and melons can be produced before wheat harvest. 5 spring beans are generally not seedlings, using mulch film live seeding, sowing time around April 10, 1 7 2 kg per mu, 4000 holes per mu, 3 seeds per hole, no seedlings. 6 Spring radish or spring radish The yield of spring radish or spring radish is not high, but it is not low, generally in early March, small arch shed live broadcast, late May and early June.

In addition, there are small vegetables such as rape, spinach, and wormwood, and winter melon, pumpkin, celery, etc.

Vegetables grown in the open air in December include radish, cabbage, Chinese cabbage, coriander, leeks, spinach, carrots, celery, cauliflower, rape and so on.

Each season has a variety of vegetables suitable for their own solar terms, scarce is expensive, suitable for each product category of the market, in the blink of an eye to the four seasons of wintering, some farmers are busy preparing for the winter of crops and some farmers start winter planting.

In winter, because of the cold temperature characteristics, there are certain requirements for the growth environment of vegetables, and some vegetables are not suitable for planting in winter if they are not cold-tolerant, and if you want to plant vegetables in the wrong season in winter, it will be more challenging.

There are pros and cons to growing vegetables in any season, and the same is true in winter, where the weather is known to be getting colder and colder, and in some places the temperature can be very low.

So it is important to understand the precautions needed in winter planting, so as to effectively prevent them in the planting process, so as to ensure the quality and yield of vegetables, especially for people who are full-time maintenance of vegetables.

First of all, winter planting should pay attention to prevent frost damage, in the deep winter there will be snow in many places, and it is common for the outdoor temperature to reach a few degrees below zero, and vegetables are easy to be frostbitten under such temperature conditions.

Secondly, it is necessary to prevent the occurrence of dead seedlings, and the temperature is low in winter, and the temperature in the greenhouse is too high, and the temperature in the greenhouse is high and the ventilation is poor.

The first is the familiar radish, although the radish likes a warm growing environment, but the radish itself has a strong cold resistance, and it can still be planted in the low temperature climate in winter. The cold-resistant temperature of radish is about 0 degrees, as long as the temperature is not very low, you can plant, you should choose varieties with high cold resistance, good varieties can save users a lot.

The second is lettuce, lettuce is also a kind of cold-tolerant vegetable, lettuce seeds can germinate at about 4 degrees, seedlings can be cold-resistant to about minus 6 degrees, and the temperature of 12-20 degrees can grow well. Therefore, if lettuce is planted in the south, there is no problem in growing lettuce in winter, because the climate in the south is warm in winter, and some areas will not fall in winter.

The third is Chinese cabbage, and the planting rate of Chinese cabbage is high in all parts of the country. The third type of late autumn is a good time for cabbage planting, and it is no problem to grow cabbage in the open air in the south. If you are planting cabbage in the north, you generally need to cultivate it in greenhouses, because the soil is easy to freeze in winter in the north, and greenhouse planting can effectively ensure the yield of cabbage.

How to water vegetables in autumn.

1. Determine the variety.

When planting vegetables in autumn, it is necessary to water according to the varieties and growth characteristics of vegetables, for cabbage, cucumbers, cabbage and other vegetables with shallow roots and large foliage, it is necessary to water frequently, and the principle of not drying the furrow surface is to tomatoes, eggplants and other vegetables with deep roots.

2. Master the period.

For the vegetables planted in autumn, it is necessary to water according to different growth periods, the water demand is large in the germination period of the seeds, and the bottom water should be irrigated after sowing, and the soil should be kept moist during the vigorous growth period of the root system, but not waterlogged, generally less watered or not watered, and the vegetables should be cultivated once after watering during the mature period.

3. According to the shape.

Before watering vegetables in autumn, it is necessary to determine whether to replenish water according to the shape of the leaves, the length of the stem nodes, the thickness of the wax powder and other appearance factors, such as the open cucumber town, if the leaves droop and wilt at noon, it means that the plant is short of water, and it is necessary to replenish water immediately.

4. Observe the soil quality.

After planting vegetables in autumn, you can water through the dry and wet conditions of the soil, soil moisture is an important factor in deciding whether to water, when there is a lack of moisture, you should pretend to be watering immediately, when the moisture is suitable, cultivate and protect moisture, and pay attention to draining the stagnant water in the field when the black moisture.