Plants also need summer heat when high temperatures hit

People have tried all kinds of ways to cope with the hot weather like saunas in recent days, but for plants, how will they spend the summer safely? The reporter learned that in order to combat the high temperature, flower growers can take measures such as watering in staggered high temperature periods, increasing the amount of water consumed by plants, and holding up black "sunshade umbrellas" for some newly planted plants to help plants overcome the torment of extreme heat.

Method 1: newly planted plants with "sunshade umbrellas" on their heads

Recently, the reporter found that in the green space on both sides of the road, many young trees are covered with black gauze, and the plants just planted have been "covered", which is quite strange. Garden experts told reporters that in fact, this is because these newly planted plants, especially lobular privet, yellow poplar, and forsythia forsythia, are still relatively delicate, their roots are not particularly developed, and their own ability to absorb water and resist heat and heat is not enough. Therefore, we need to do some protection. These black gauze can effectively block the direct exposure of the sun and prevent newly planted plants from getting sunburned.

Method 2: big-leaf plants drink 30% more water every day.

In order to cope with the continuous high temperature weather, the amount of water for some drought-intolerant plants should be increased. Garden experts say that as long as drought-tolerant plants such as purple-leaf plums have survived, they can safely spend the summer without special rehydration, but large-leaf plants that are not tolerant to drought, especially freshly mowed lawns, need to be inspected constantly to strengthen rehydration. "the newly mowed lawn will receive more sunlight, and the cross-section will also increase water evaporation, so it is necessary to increase the amount of water by about 30%, and the maintenance cost will increase accordingly. Therefore, in the greening project in this city, we should try our best to reduce the area of lawn and increase the area of native trees and shrubs so as to reduce the maintenance cost. "

Method 3: water plants at low temperature in the morning and evening

Under normal circumstances, when the temperature exceeds 30 degrees Celsius, flowers and trees should not be watered against the sun, otherwise the plants will be "choked", which is not conducive to growth. For this reason, the daily watering time is chosen as far as possible when the temperature is relatively low in the morning or in the evening, to avoid irrigation during the period of high evaporation, and the rest of the time for pest prevention and maintenance of plants, removal of lawn weeds and pruning seedlings.

If you don't have enough to eat, you always "sweat". Continuous high temperature does great harm to plants.

What harm does the continuous sauna do to plants? Garden experts told reporters that the high temperature mainly destroyed the balance between photosynthesis and respiration. For plants, photosynthesis is equivalent to human dietary activity and the process of absorbing nutrients, while respiration is just the opposite, which is the response of plants to energy consumption. The optimal temperature of respiration is always higher than that of photosynthesis, so when the temperature is too high, respiration will exceed photosynthesis, leaving plants in a state of "hunger". For a long time, plants will die of "hunger".

High temperature can also promote transpiration, make plants sweat a lot, destroy the water balance, and become wilted and withered. Tianjin is in the warm temperate zone, plants blossom and bear fruit in summer, and this period is the most vulnerable to high temperature injury. When plants encounter high temperature during flowering, they will blossom earlier and reduce the total amount of flowers every day, thus affecting the normal fruit.

The dormant drooping leaves are rolled into needles, and the plants have their own tricks to prevent summer heat.

Experts from the Landscape Research Institute said that in addition to artificial special care for plants, in fact, many plants themselves have a wonderful way to prevent heat.

Dormancy-some animals choose to hibernate in winter, while many plants dormant in summer, such as begonia, which grows slowly and is easy to get through the hot summer. However, experts also warn that such dormant plants do not need too much watering, because too wet root soil environment can easily cause rotten roots.

Drooping leaves-in the face of high temperature, plants will actively close their stomata, and before closing the stomata, a large amount of water will evaporate through the leaves and drain out of the body. at this time, the plants will soften and the drooping leaves will protect the plants inside. to prevent excessive exposure to the sun.

Needle-shaped leaves-these plants include all kinds of pines and cypresses, which are good at avoiding heat among plants, and their leaves naturally degenerate into needles in order to reduce water evaporation in summer.