Can plants also predict the weather?

"Mimosa is shy and it will rain." In other words, if the leaves of mimosa naturally droop and close, there will be a "shy" phenomenon, which indicates that it will rain. In normal weather, mimosa is generally not shy. Even if people touch its leaves, they close quickly, but they recover quickly. If the weather changes, mimosa itself is very sensitive to temperature. At this time, if you touch its leaves with your fingers, the leaves will close accordingly. If the folding range is not large, the recovery will be quite slow, which indicates that it will turn rainy in a day or two.

Red clover and sorrel can also measure the sky. When the storm comes and the clouds are full, they will automatically fold the leaves, but they are not as sensitive as mimosa, but they will also indicate rain.

"The petiole of thatched grass" spit out "and will work in the rain tomorrow." Thatched grass is a perennial herb with long roots and linear leaves, which is distributed almost all over the country and can be used as feed and paper raw materials. In midsummer, a small mass of water foam will appear at the junction of thatched leaves and stems (petioles), like the foam spit by crabs, indicating that it will rain one day later. Why is this? It will rain, and the air humidity will increase. The closer to the surface, the greater the humidity, and the more water the roots of thatch can absorb. In addition to the needs of supplying various tissues, there are redundant and redundant water that will overflow from the petiole, as if "spitting".

"It rains on a musty day." Bahia grass, called Zoysia japonica, is also a perennial herb, with two leaves in one section and roots growing in the ground one after another. It germinates in early spring every year and withers gradually in the cold dew season. Sometimes there will be a small group of moldy hairs on its petiole, which are white, grayish white or yellowish brown, just like moldy hairs on food. Moldy hair first appeared from the roots and gradually spread to the upper part of the stem. After a few days, the moldy hair gradually increased and finally fell to the ground. This is a good sign of rain. Zoysia japonica is characterized by drought tolerance. Zoysia japonica, which grows in a place with sufficient water, will also be mildewed in normal weather. Zoysia japonica, which grows in dry places, has a good indication for forecasting the weather. Especially in Huangmei season, the effect of forecasting weather is better.

"The reed heart is dying and the heavy rain is coming." "The ears of the reed flowers are very long, so be careful of rotten rice fields." "firewood lice are crawling around, hurry to the dam." Summer is the season when reeds flourish, and sometimes they gradually turn yellow and wither from the top, which indicates that there will be heavy rain in the next few days. In August of the lunar calendar, reed flowers are in full bloom and rice is fragrant. The spike length of Phragmites communis in normal years is 13 ~ 16 cm. If the spike length of Phragmites communis is about 20 ~ 26 cm, it means that there is too much rain in autumn that year, which may have a certain impact on the harvest of middle and late rice. Whenever there are many black and white bugs on the back of reed leaves, the locals call them "firewood lice", and it will rain heavily soon.

"It's going to rain when the water chestnut plate sinks." Water chestnut growing on the water surface of rivers and lakes, whenever rainy days come, the temperature becomes higher and the air pressure decreases, the mud in the river pond rots and ferments, the gas escapes from the water surface, the water bubbles constantly, and the dirt sticks to the leaves of water chestnut. At the same time, the little snail can't stay at the bottom of the water, and climbs up along the water chestnut vine, which increases the weight of the water chestnut head and gradually sinks, which will be a harbinger of rainy weather.

"The bottom of the water is covered with moss, and there is wind and rain." In the water town where rivers crisscross, moss in freshwater floating algae can be seen everywhere. When its filament is illuminated by light, it can be seen that it is covered with a thick green colloid. From spring to autumn, there are mosses under the water, and it will rain soon. It turns out that the fermentation of rotten substances in the mud at the bottom of Hegou Reservoir, coupled with the low air pressure, promotes the discharge of gas in the water, so that moss attached to the mud is often brought to the surface. According to the time when moss surfaced, the rainfall in April-May can be predicted. Moss comes out late and it rains in late spring; Get up early, but there is little rain in late spring.

"Pumpkin head down, it's going to rain." Pumpkin vines generally extend upward and grow gradually. In the summer morning, if the melon and vine heads are generally downward, it is a sign that the weather will turn to rain; In rainy weather, if most melons and vines are upturned, it is a sign that the weather will clear up. It turns out that the head of pumpkin vine has yang and yin changes. When it shows obvious sunshine, most of the melon and vine heads are upturned, indicating that sunny days are coming; When it is obviously negative, the head of melon and vine is mostly downward, indicating that rain is coming.

"Leek sprouts early and spring comes early." Early spring is warm and cold, and leeks often sprout. The early germination of leeks is a sign that the temperature rises quickly in spring; The late germination of leek is a precursor to the slow rise of temperature in spring. This image is mostly correct, but sometimes there are exceptions because of the great temperature change and the influence of spring rain. "A spring rain is warm, and ten spring rains wear light clothes." Although leeks germinate late, the temperature rises quickly in spring. Leek also reacts to sunny and rainy days. Cutting leeks smells delicious. If it is a sunny morning, it is a sign that it will rain. If it is a rainy morning, it is a signal of continuous rain and more rain.

"Willow sprouts early, and the temperature is high in early spring." "Willow Ye Er is white, and it will rain." "Willow roots have red whiskers, and there will be more rain in the future." Willow is the messenger of spring, "there are wickers in spring." On the roadside of rivers and lakes, weeping willows are lingering and fluttering in the wind. Willow buds are sprouting, scales are cracked, and green tips are exposed. Willow buds come out early and the temperature is high in early spring. If the germination is late, the temperature is low in early spring. In summer, willows are green and nature is full of vitality. The sunny side of willow leaves is green and the back is light green. On a sunny day, the leaves are sunny and look green; Before it rains, the leaves are generally upside down, and the back is light green, which looks lighter than green and has a white feeling. This is a sign of rain. If it is found that the roots of willows produce red whiskers, which must be 3 ~ 6 cm long and the tips are white, it indicates that there will be more rain next month.

"When the peach blossoms are exhausted, it must be early Huangmei." "Peach blossoms fall into the mud, and wheat is harvested from the pond." Peach blossoms are in full bloom, and the splendid Xia Hong and the swaying green willows set each other off, with endless spring scenery. Whenever peach blossoms are in full bloom in the Jianghuai Valley, there will be more rain (80 ~ 100 mm), which indicates that the amount of plum rain will be less in that year. If it rains for several days in a row, it means that there is little rain from Xiaoman to mangshi. Whenever the peach blossoms are about to fall, there is more rain (commonly known as "Xie Huashui"), which shows that there is less rain during the wheat harvest.

"When a wormhole drips water, there will be rain." Moths often make holes in the branches of elms, poplars and willows. If water drips from the wormhole, it is a sign of rain. When the rainy day comes, the temperature rises, the transpiration of elm becomes smaller, and the absorbed water is redundant, so it drips out.

"Cyclobalanopsis leaves are red, and there will be heavy rain." There is a "meteorological tree" next to Dinglongshan Village in Xincheng County, Guangxi, which can also predict sunny and rainy days. On sunny days, the leaves of the green bar trees are generally dark green. When they turn red, it indicates that there will be heavy rain soon. After the rain stopped, the leaves turned dark green again. Local farmers predict sunny and rainy days according to the discoloration of leaves and arrange farm work.

"Elms germinated before the arrival of Grain Rain, while Grain Rain was mostly waterlogged." There is an elm tree in Gaoguan Township, Anhui County, which has a history of more than 400 years. Local farmers can infer the rainfall of the year according to the germination time and leaf density of this tree. It germinates in front of Grain Rain, and Grain Rain will be rainy, with high water level and frequent waterlogging; If the germination is late and the leaves are few, it means that there is less rain and the drought is serious. If it germinates on time and the leaves are sparse and dense, it means that the weather was good in the past. Decades of observation data have proved that its germination is a matter of time, which corresponds to most of the floods and droughts in various years.