Jimu news reporter Xiao Yang
Correspondent Li Sha
What does the internal structure of an onion look like? What conditions are required for potato germination? What happens when sweet potatoes meet water? Do garlic and ginger grow leaves? On May 10, Jimu News reporter learned from the Ten Small Schools in Steel City, Qingshan District, Wuhan City, that in the face of the problems of his classmates, Huang Hongyun, a science teacher, had an idea to arrange for all the students to work together on the windowsill to hydroponic vegetables. So there were more than 10 kinds of vegetables such as shallots, lettuce, onions, carrots, potatoes, sweet potatoes, garlic, greens, celery, coriander, etc. on the windowsill of each class in the school, and the students packed these vegetables in different containers.
Li Meng, a student in class 601, was the first to find that after the onion was peeled, the bottom was "sitting" on the glass bottle, and the young leaves that grew after 10 days could replace the seasoning of the shallot stir-fry. He Peiling said: "After the carrot cuts off five centimeters and the head is immersed in water for two weeks, the nutrient-rich radish leaves grow out. It can be used to stir-fry vegetables and put soup. ”
Teacher Huang and the children walked together on the window sill, observed carefully together, discussed the differences of the day together, smelled the smell together, measured the size changes with their hands, and explored the mysteries of the windowsill with wise eyes. Under the guidance of Teacher Huang, students use transparent containers to ensure that the roots receive sufficient light. It is also possible to "monitor" the remaining amount of water so as not to dry up. Secondly, do not inject too much water, soak the root whiskers to prevent rotten roots.
Grades 5-6 "delve deeper" and write research reports that say these vegetables are suitable for hydroponics, but the cultivation methods are slightly different and need to vary depending on the "vegetables". Chen Jiahao of the 601 class said that from March 29, the hydroponic potatoes began, three days later grew purple buds, and then began to grow green leaves, two weeks later the bottom grew white whiskers, three weeks later the buds grew to 7 cm, the buds changed from purple to green, let me really feel the existence of life.
Yang Taoming, a student in class 501, found that the leftover lettuce hearts were soaked in water, sprouted after 3 days, and the new leaves that grew after 10 days could be picked and eaten. Ai Xinyue found that "garlic, taro, sweet potatoes, potatoes, onions, red roses, celery sticks, these bulbs, tubers, originally sprouted or with roots, only need to be raised in hydroponic containers to germinate and grow."
Li Chengye wrote in the report: "I saw that the mung beans, soybeans and peanut beans on the windowsill of the next class can be used for soilless cultivation and grow beautiful leaves. It is worth mentioning that hydroponic beans can only be placed on damp sand or gauze before budding, and cannot be completely soaked in water, which will be moldy. ”
In more than 40 days of observation and exploration, the students' previous questions have been answered. At the same time, everyone learns to care for a small life with heart, and can better and more intuitively understand and explore every change of vegetables, take root, sprout, and grow slowly, at each growth stage, Teacher Huang will lead the students to observe and record the growth and changes of plants, so that students can truly participate in it and experience the fun of exploring nature. Students learn to cooperate and develop throughout the process, so as to achieve the purpose of environmental education.