What is the impact of the relatively high temperature in summer on the cultivation of vegetables?

High temperatures bring vegetables to sunburn. The summer sun is very scorching, even people's ** can't stand it, and they will get sunburned. Vegetables are the same, especially some green leafy vegetables, in the face of high temperature in summer, vegetable leaves will be sunburned gray spots of different sizes, the use of corn tall crops for shade, such as planting coriander, emperor cabbage, cabbage, etc. in summer, the vegetable farmers in our village are planting between the corn rows, and now it is just the period of corn tasseling, and the tall corn plants can shade the vegetables, and the effect is better.

<> pepper flowering and fruiting vegetables, you can consider using a shading net with a relatively thin mesh to properly shade the sun, if not, in addition to soil, it is recommended to use dry straw or other weeds to cover the periphery of the vegetable roots, which also plays a role in sun protection and moisturizing;The soil is arid and crops are short of water. In summer, the weather is hot, the temperature is high, the water evaporates relatively quickly, if there is no rain or little rainfall, the soil is dry, and the vegetables planted lack water, the leaves will be rolled, yellowed, and fall off.

First of all, in the vegetable greenhouse, for the prevention of sunburn, or based on the role of "shade net", in my rural home in Pingliang, Gansu Province, a large shade net will be laid on it during the day when the high temperature lasts in summer. The effect is quite good. What can be cooled can be cooled:

If it is planted in a shed, it can be properly shaded, such as shade nets, spraying greenhouse temperature film cooler, sprinkling mud ideas, etc., to reduce the temperature in the shed as much as possible.

Breed selection:The choice of varieties is crucial, such as cabbage, peppers and other vegetables, divided into different varieties, when choosing to understand whether they are strong in disease resistance, whether they can withstand high temperature and other factors. This is the premise of planting, and vegetable farmers cannot ignore it.

Different crops have different requirements for temperature, but the reaction brought by high temperature is the same, that is, the water evaporates faster and the crops grow faster, so the first thing to do at this time is to cool down and prevent heatstroke.

When the temperature is too high, it is easy to produce drought and cell dehydration, which affects the physiological and metabolic activities of plantsWhen the ambient temperature is higher than the optimal temperature requirement of the plant, it will adversely affect the plant and cause harm to the plant, that is, it will cause high temperature stress to the plant.

High temperature will lead to abnormal metabolism, ammonia poisoning and protein destruction, gradually causing plant damage The leaf color becomes lighter, the growth of leaves and roots is stunted, and the plant shows that the leaves lose water and wither yellow in a short period of time.

1. Shade. The use of corn tall crops for shading, such as planting coriander, emperor cabbage, cabbage, etc. in summer, the vegetable farmers in our village are using the corn between the rows to plant, now it is just the corn tasseling period, the corn tall plants can shade the vegetables, the effect is better.

Build a shade shed, the summer sun is strong, the temperature is high, most of the vegetables are planted in greenhouses or small arch sheds, covered with shade film, can significantly reduce the temperature in the shed.

Second, the selection of high-temperature resistant varieties, such as the selection of Baiyang, Xiayang, spring and summer Wang Hao Xiaoza 56 and other Chinese cabbage varieties. Cucumbers such as Jinyan No. 5, Jinyan No. 7, and Jinchun No. 5. Purple blood cowpea, red-billed swallow, Yang Cow No. 40, Zhi Cow and other cowpeas.

3. Frequent watering, summer planting vegetables should master frequent and shallow watering to reduce the surface temperature, keep the soil moist, and fertilize and watering in the evening. Pay attention to drainage after rain.

Fourth, cultivating weeding and soil cultivation, the summer climate is hot, the rain is more, the weeds grow faster, vegetable planting should be diligent in weeding, to prevent grass damage, pay attention to soil, cultivation should be shallow, stop cultivating after the closure, the growth of vegetables in the later stage, to remove the old yellow leaves frequently, in order to facilitate ventilation.

The subject asked: Vegetables suitable for planting at high temperatures in July, vegetables are temperature-loving, but for more than 35 high temperatures, the growth slows down, and even some vegetables will stop growing, drop flowers and fruits, and wilt. So which vegetables can be grown in high temperatures?

First, chili peppers. Pepper is planted in the open air in the countryside, it is sown before and after the Qingming Festival, transplanted in the field before and after the beginning of summer, and begins to be listed during the summer solstice, and it is from July onwards, a large number of peppers enter the flower and fruit period, the growth and development speed is fast, and the basis for the prevention and control of pests and diseases is above, amaranth is a green leafy vegetable, and there are two varieties of green leaf type and purple leaf type. Since the beginning of summer, our local farmers have often sown this vegetable.

Amaranth is planted more in July, mainly because of its short growth cycle, heat and drought tolerance, and it is relatively easy to grow.

Lettuce can be grown basically all year round, and lettuce can be eaten directly raw, hence the name. Lettuce grows at around 20 temperatures, and although it prefers a cooler climate, it is currently sown in July, planted in early August, and harvested in early September. For example, when we plant autumn peppers in our vegetable garden, they are usually sown in July and August, and they can be eaten around October from planting to flowering and fruitingAutumn eggplant, for example, is also usually planted in July and August and harvested in autumnFor example, autumn cucumbers, autumn tomatoes, loofahs and other vegetables.

First of all, cowpea can be planted in July, cowpea is also called carob, or bean, long bean, we plant it more in this season, basically it can be said that it is planted in the small vegetable garden of every household. Cowpea is a very heat-tolerant plant, and beans are heat-resistant vegetables, which can withstand high temperatures, and can still grow well when the temperature exceeds 35 in summer. Beans are adaptable, and fertile soil plots can promote nutrient and water absorption, which is conducive to the growth of crops.

Water spinach is an amphibious plant, if you are afraid that it can be planted in the paddy field due to drought, it can withstand high temperatures, very suitable for summer planting, water spinach has a big advantage is that it is like a leek, cut a stubble and grow the next stubble, very convenient.

In my opinion, the vegetables that are more resistant to high temperatures are: cucumbers, tomatoes, beans, water spinach, okra, asparagus, spinach, lettuce, spring sweet cabbage, zucchini, etc.

Vegetables that are more resistant to high temperatures include radish, celery, Chinese cabbage, spinach, eggplant, tomatoes, and potatoes, which are suitable for growing in summer.

Okra is what we usually call coffee okra, okra needs to be kept in a sunny and warm environment all year round to grow well, and is very drought tolerant, afraid of excessive frequent water, in the south of our country can be planted, can even be raised in a relatively large pot.

Cucumber as the most heat-tolerant vegetable, cucumber is indispensable to grow in summer, can be eaten raw, cooked, beauty, etc., but cucumber in the continuous high temperature and drought weather, to spend more effort in watering.

In the summer, the temperature is high, and in addition to the leaves of some vegetables that bloom are burned by high temperatures, the flowers are burned by high temperatures, and the fruits that are stunted and fruiting will also appear deformed, and if they bloom and develop poorly, they will drop and reduce the yield. In summer, vegetable pests and diseases tend to be high. Mainly in the summer, the weather is hot and rainy, and in order to prevent pests and diseases, it is necessary to regulate the temperature and humidity.

Reasonable dense planting, scientific fertilization, improve plant disease resistance. After the occurrence of pests and diseases, vegetables should be removed from diseased plants, weeds in the field, and targeted sprays should be sprayed to prevent the spread of pests and diseases. The adverse effect of high temperature on the growth of vegetables is the basic reason for the autumn light of vegetables.

Except for a few heat-tolerant varieties such as winter melon, pumpkin, bitter gourd, bean pod, water spinach, etc., most vegetables cannot withstand high temperatures. In the middle of summer, not only do you like cold vegetables such as spinach, cabbage, radish, and snow peas, but you can't grow hot vegetables such as tomatoes and peppers.

High temperature and rain, high temperature and drought will lead to the frequent occurrence of various pests and diseases, significantly reduce yield, and even lose harvest, aggravating the occurrence of autumn off-season. When the temperature is above 30, if there is no rain or little rain, soil drought and atmospheric drought may occur, and if the vegetable roots cannot meet the plant's evaporation needs, the leaves of the vegetable plant will wrinkle and fall off, the quality will deteriorate, the yield will decrease, and the wilt will die. High temperatures and long days increase the males of cucumbers, and females differentiate late.

When the flower eyes of tomato and pepper are differentiated, there are few flowers at high temperatures and they are stunted. The air temperature or ground temperature is higher than the temperature range of the normal growth of vegetable plants, which will cause some disease-resistant varieties to lose their disease resistance and aggravate the occurrence of diseases.

High temperatures are often accompanied by strong sunlight, and strong sunlight shining on the fruits of vegetables such as eggplants and melons for a long time will cause both sides of the fruits to be burned by the sun, thus causing a spot disease. High temperatures and droughts can adversely affect the flowering process of vegetables such as eggplants and beans, resulting in flower and fruit drop. Drought and lack of water can easily cause dried cabbage, tomato navel rot, etc.

Reasonable leaves should be left in the summer leaves, and the fruits should be hidden under the leaves as much as possible to avoid direct sunlight. Therefore, when tomato vegetables are carried out in high temperatures, it is necessary to avoid doing it in the high temperature of the noon in the strong light, and it is best to choose after 3 p.m. In addition, when summer vegetables are officially eaten, the rows of the stumps should be closely spaced so that the stems and leaves are shielded from each other, so that the fruits are not directly exposed to the sun.

High temperature can affect the normal growth of vegetables, resulting in intensified plant transpiration, dehydration symptoms of vegetables, plant photosynthesis will be weakened, respiration will be strengthened, resulting in a shortage of nutrients in the plant, and the growth of vegetables is inhibited. At this time, the soil will be dry, the water supply will be insufficient, and even dry up and die. The strong light in summer accompanied by high temperatures can cause the south-facing parts of the fruit surface of melons and vegetables to be sunburned by the sun.

Prevent heat hazards by improving the heat tolerance of growing vegetables.

The selection of varieties with good heat tolerance can effectively improve the heat tolerance of planted vegetables. For example, the heat-tolerant tomato variety Zhongza 9 is more resistant to high temperature, and can still grow well in the summer protected area, and under a certain high temperature, flower bud differentiation and fruit setting are almost not affected. It can be seen that heat-tolerant vegetable varieties can have a good tolerance to high temperature in summer.

The harm of high temperature weather to vegetables is not small, if you do not take cooling measures, it will cause a reduction in vegetable yield, so you should choose high-temperature resistant varieties for planting vegetables in summer, reasonable dense planting, scientific fertilization, set up shade nets, and interplanting with high-pole crops, so that vegetables can spend summer safely.

Some vegetables are suitable for growing in the hotter Hoopai areas, but as the temperature rises, regional variations may occur in the areas that are suitable for cultivation. Local populations need to adapt their traditional crop varieties to new environmental temperature changes. High temperatures can lead to pests and diseases, which can affect yields.

The biggest impact of climate change is the reduction of vegetable production, and climate change has turned the alpine Gobi into a vegetable base. At an altitude of more than 1,500 meters above sea level, in Yangjiasi Town, Qinzhou District, Tianshui City, the cold climate has brought difficulties to the development of agriculture here. Fruit trees and wheat harvests are poor, not to mention vegetables.

Many local villagers had to give up planting and choose to work outside the home. However, in recent years, with climate change, the local temperature has increased year by year, and the rainfall has increased, but it has gradually evolved into a famous vegetable planting base.

Extreme weather is more frequent and harder**. You can feel the climate in China this year, especially in the summer. For example, some students who worked in Canada this year told me that during spring sowing, there were severe floods in the east and droughts in the west.

They have not finished planting in June in eastern Canada due to flooding; In the west, there is a severe shortage of water after planting. Perhaps the future crop can be saved, but the yield and quality will suffer. It is recommended to add biological bacteria to the soil to supplement the beneficial bacteria, improve soil permeability, ensure a healthy soil environment, and facilitate the growth of vegetables.

It also promotes root growth, making capillary roots more developed.

<> soil quality directly affects the growth of vegetables, soil fertility should be improved. And I recommend adding biological bacteria to the soil to supplement the beneficial bacteria, improve soil permeability, and ensure a healthy soil environment, which is conducive to the growth of vegetables. It also promotes root growth, making capillary roots more developed.

The different varieties of vegetables directly affect their yield and quality, which is closely related to the selection of disease-resistant varieties and the cultivation without male eggplant beats. In order to reduce the utilization rate of pesticides, reduce pesticide residues, and realize the production of green vegetables, vegetable seeds with strong resistance to diseases and pests, abundant yield, and excellent varieties should be selected according to local conditions.

Color, taste, weight, growth cycle, easy to rot roots. Mainly the above 5 effects. Grow in a vegetable greenhouse to avoid the impact of excessive temperature difference.

Use bees to pollinate ants to achieve uniform pollination. Spray irrigation to avoid root rot due to overwatering.

It will affect the size of the vegetables, affect the appearance of the early vegetables, affect the nutrients of the vegetables, and affect the taste of the vegetables, which will make great changes in the quality of Zhongsong, and most of the high-quality vegetables are grown through greenhouses.

The impact of climate change on the quality of vegetables is very large, when the weather is cold, it will lead to a decrease in the yield of vegetables per mu, vegetables are frozen, and waterlogging will occur when there is too much rain, and high-quality vegetables should be planted in greenhouses.