Information about nature

After beginning of spring, the language of nature, the earth gradually woke up from a deep sleep. Snow and ice melted, vegetation sprouted, and all kinds of flowers bloomed for the first time. Two months later, the swallow returned lightly. Soon, the cuckoo also came. So it becomes a hot summer, that is, the period when plants breed fruits. In autumn, when the fruits are ripe, the leaves of plants gradually turn yellow and fall in the autumn wind. The geese flew south, and the insects active in the fields and grass disappeared. Everywhere I go, I see a scene of falling grass, preparing for the winter when the snow is coming. In the temperate and subtropical regions of the earth, this is the case year after year, and it goes on and on. For thousands of years, working people have paid attention to the relationship between natural phenomena such as the rise and fall of vegetation and the coming and going of migratory birds and the climate, and arranged farming accordingly. Apricot blossoms are in full bloom, as if nature is preaching to cultivate the land quickly; Peach blossoms are blooming, which seems to imply that we should plant millet quickly. The cuckoo began to sing, and the working people understood what it was singing: "Grandparents, cut wheat and transplant rice." In this way, flowers and birds sing, grass grows and warblers fly, all of which are the languages of nature. These natural phenomena were called phenology by working people in ancient China. Phenological knowledge originated very early in China. Many agricultural proverbs (3) handed down from ancient times contain rich phenological knowledge. In modern times, using phenology knowledge to study agricultural production has developed into a science, that is, phenology. Phenology records the growth and decline of plants and the reproduction of animals, such as peach blossoms and swallows, so as to understand the change of climate with the passage of seasons and the influence of this change on animals and plants. Phenological observation uses "living instruments", which are living organisms. It is much more complicated and sensitive than meteorological instruments. Phenological observation data ① reflect the synthesis of climatic conditions such as temperature and humidity, and also reflect the influence of climatic conditions on organisms. When applied to agricultural activities, it is simple and easy to master. This is the importance of phenology to agriculture. Here is an example. According to the phenological records in Beijing, the flowering of peach, apricot blossom, apple, elm leaf plum, Xifu begonia, clove and Robinia pseudoacacia in196/kloc-0 is about ten days later than that in 1968+0, and five or six days later than that in 1960. According to these phenological observation data, it can be judged that the agricultural season in Beijing 1962 came late. However, crops such as peanuts planted in the early spring of that year were planted according to the date of previous years, and the result was frozen by low temperature. This loss can be avoided if we can pay attention to the phenological delay and choose the appropriate sowing date.