Plant composition of onion
Root: The radicle of onion will shrink soon after being buried, so there is no main root. Its root is a string-shaped fibrous root, which is planted at the base of the shortened stem disk. The root system is weak and hairless. The root system is mainly distributed in the top soil of 20 cm, so it has weak drought tolerance and weak ability to absorb fertilizer and water. The growth temperature of root system is lower than that of aboveground part. When the ground temperature is 5℃, the roots begin to grow, and the optimum temperature is 10~ 15℃, and the growth is slow at 24~25℃.
Stem: During the vegetative growth period, the stem of onion becomes shorter, forming an oblate conical stem disk, the lower part of which is the heel of the stem disk, and the upper part of the stem disk is surrounded by cylindrical leaf sheaths and branches and buds, and fibrous roots grow below. The heel tissue of mature bulb shrinks and hardens, which can prevent water from entering the bulb. Therefore, the heel can control the premature growth of roots or the premature germination of bulbs. In the reproductive growth period, plants are affected by low temperature and long sunshine, and the growth cone begins to differentiate into flower buds, which are tubular and hollow, with wax powder and inflorescences at the top, and can blossom and bear fruit. Due to the degradation of flowering period, onion bulbs form aerial bulbs in buds.
Leaves: The leaves of onion are composed of leaf body and leaf sheath, forming pseudostems and bulbs. The leaves are dark green, cylindrical, hollow, and the abdomen is hollow (this is one of the morphological signs that distinguish the seedling stage from the green onion). The tubular leaves of onion grow vertically, with small leaf area and thick wax powder on the surface, which is an ecological feature of drought resistance.
Flowers: Scape is stout, as high as 1 m, hollow and cylindrical, expanding below the middle, tapering upward, and the lower part is covered by leaves; Involucre 2-3-lobed; Umbellies are spherical with many dense flowers; Pedicel is about 2.5 cm long. Pollen white; Tepals with green midvein, oblong-ovate, 4-5 mm long and 2 mm wide; Filaments are the same length, slightly longer than perianth segments, and combine at the base of 1/5. 1/2 is attached to the lower part of the joint, the base of the inner filament is extremely expanded, and there are 1 teeth on both sides of the expanded part, and the outer wheel is conical;
Ovary: nearly spherical, with curtain at the base of abdominal seam; The style is about 4 mm long. Flowering and fruiting period may-July.
2. Observing the growth of garlic How to write 50 words Gao asked us to plant and observe the growth of plants, so I planted a garlic tree.
I took a garlic, broke off a garlic clove, found a small flowerpot, filled it with a lot of soil, planted it in it and watered it with some water. Then I watch it every day and water it regularly. A day later, it showed a small bud wrapped in a film, bent and bright yellow. The next day, Xiaolei came out of the film, and Huang Tou looked around as if to say, "Wow, the world is really beautiful." Then it took off its clothes. The next day, its small buds turned yellow-green, but its big belly was very small. After a day, it turned into a big leaf, full, with a small bud in the middle. I watered it and it looked greener.
My garlic sprout grows day by day. Now, it is twenty centimeters high and has many green leaves. I am very happy to see it full of vitality.
I often stare at it, looking at its green leaves and tall stems, and I am very proud.
At noon today, my mother bought some onions, and my eyes suddenly lit up, remembering the task that the teacher asked us to plant a plant after school to observe. Just grow onions! As soon as I came up, I quickly took a convenient bowl in the kitchen, then put a modest onion in it, and poured some water to drown the onion in half. I was looking at my masterpiece proudly. When my mother came to see it, she was surprised and said, "Curtin, if you use so much water, you will drown the onion."
After listening to my mother's words, I quickly poured out some water, but I was thinking, "With such a little water, onions will be sucked dry all day." Can onions grow without water? " Two days later, I found that the top of the onion was cracked, and a green seedling was sticking out, like a big purple egg. The growing seedling was exposed bit by bit, like a chicken pecking in the eggshell. I touched it with my hand in surprise. It was slippery and soft. I took the onion out of the bowl by hand and looked at it carefully. The roots of onions grow many short white roots. It is these roots that absorb the water in the bowl and keep the onions growing. I put the onion back in the bowl, and I found that the onion was raised a little by its roots. If there were more roots, onions wouldn't be pushed out of the bowl, would they? Thinking of this, I pressed the onion, and my mother smiled: "Don't press it, silly child, if you press it any longer, it won't last long."
After listening to my mother's words, I was too scared to press it again. This morning, I found that the onion seedlings are greener. I measured it with a ruler. It is 6 cm high, like a small pillar. When I came home from school at noon, I was surprised to find that the onion seedlings had split into several pieces. Who broke the onion? I hurried to tell my mother, and my mother said unhurriedly, "The young onions are dividing leaves!" " "oh! I realized that this was a false alarm.
How fast the onion seedlings grow! I seem to hear the sound of onion "whoosh, whoosh, whoosh" growing upward every day. The onion seedlings are already 3 inches tall. My mother said it would be cut to taste in a few days. I think it would be great if the onion seedlings can grow up quickly and become another onion.
4. Observation of plants 50 to 100 words Plant observation diary 50 words: observation of rape flowers
Today, I found that rape flowers have sprouted. Seeing two leaves flying in the air like butterflies from a distance is very beautiful. I looked at it carefully. The stem of rape flower is very thin, and the leaves are separated from the middle. Every leaf is like a little love. Touching rape blossoms: smooth and comfortable. Smell it: there is no smell.
Rapeseed, please grow up!
Plant observation diary 50 words: Narcissus observation diary
Today, my mother and I went to buy daffodils. My mother bought me two beads. When I got home, I put the flowers in the basin.
After a day, Bud appeared and looked a little shy. To my surprise, it looks a bit like it. . . Garlic? Forget it! Maybe you will be beautiful when you grow up.
Lovely' little garlic' grow up quickly!
Plant observation diary 50 words: flower viewing diary
Time: February 1 location: janitor: one person.
When I look at flowers, I find that leaves are like cotton, and some leaves have holes. There are veins in the middle, smooth leaves, green leaves and soft and elastic stems. It consists of roots and leaves, some of which will turn yellow. I like to live happily in wet soil, and some leaves will rot. Generally, it takes many years and needs sunshine, water and air. Generally, flowers bloom in August and September, and flowers are edible. The color of flowers is white. They are herbs, which usually wither in winter. Life goes through several growth stages, such as seed, germination, seedling, flowering and fruiting.
Plant observation diary 50 words: seed germination
A few days ago, I planted green seeds in Shanghai.
I watch carefully and water carefully every day. Today, when I watered it, I found a small seed sprouting.
If you don't look carefully, you can't see it; If you look closely, you will find that the seed is so small that it is almost invisible. A few days later, the bud has grown to a centimeter long and a small leaf has grown.
The seeds are getting taller every day, and I think they will bear small fruits.
5. Observing the growth of garlic seedlings during the Spring Festival, I planted a pot of garlic at home, because I saw from the encyclopedia that garlic grows faster in plants and will "mutate" when it grows up, and fresh and delicious garlic seedlings will grow inside.
I feel incredible and decided to try it myself to prove that this incredible statement is correct. I took out the garlic my grandmother just bought from the supermarket, poured some soil from the garden and poured a small bottle of water according to the method mentioned in the book. It's raining outside, which makes my nervous mood even more tense. I peeled the garlic carefully one by one for fear of hurting the garlic. In that case, I can't grow fresh and delicious garlic.
I conquered all the previous processes. Then I started kind of garlic.
I added some water to the soft soil. As a result, the soil was so wet that it became a veritable mud. I was so remorseful that I had to bite the bullet and plant the peeled garlic according to certain rules. How hard it is to wait! The first day and the second day, garlic never came out as I expected. I thought to myself, it's been two days, and I haven't even tipped. The author of this book is too poor! Is this a long time? But who would have thought that on the third morning, after I got up, I couldn't wait to rush over to see my garlic. I think it may still be the same today. When I got there, my mouth was O-shaped. Oh, my God! My garlic seems to have eaten magic elements, and many garlic tips have sprouted a little green shoots. My heart is full of joy, just like eating honey! On the fourth day, the green shoots grew tall. On the fifth and sixth day, my garlic seedlings grew rapidly, from the initial 1cm to 3cm. As a result, on the seventh day, I was surprised to find that there was another green leaf on the garlic shoot. I jumped up happily and thought, God help me, too. There is only one young garlic shoot in other people's house, mine. .
Another week passed, and when the garlic sprout drooped like a tired girl, her mother said, Come on, it's time to harvest! At dinner, delicious garlic seedlings became the main course of my family. Eating the fruits of my hard work, not to mention my psychological joy.
Experiments show that the growth period of garlic seedlings is really short, and it will "mutate".
6. Growth Process of Onion and Potato in Water Composition 1000 Digging Potatoes Recently, because of some trivial matters, my grandmother asked my father to go back to my hometown, and my mother and I also went. Every time I go back to my hometown, I always come home with a full load-my grandparents always pack pollution-free vegetables for us. On the morning of leaving, grandpa went up the mountain to dig potatoes again, and I followed with my basket.
Walking to the sweet potato field, I asked my grandfather if this was a potato field. Grandpa smiled, and all the relatives and neighbors on the mountain looked up and said with a smile, "Ye Ye, if you stay in Shiyan for another two years, you won't recognize anything when you come back!" I rarely see crops! "I am embarrassed to lower my head. At first I thought we were so early! Finally arrived at the destination, I saw a layer of plastic film about half a meter wide and about five or six meters long on the ground. Many potato seedlings burst out of the membrane, potato leaves were oval, and potatoes were buried underground. I didn't look good when grandpa started digging. Grandpa dug a few potatoes, so I was in a hurry to dig. Grandpa wouldn't let me dig, so I spoiled. Grandpa was soft-hearted and gave me the hoe.
7. The growth process of onion and potato in water Composition 1000 words Yesterday I learned some truths, which are of great significance to me, but this truth comes from potatoes in home-cooked recipes.
The thing is, I was helping my mother cook when I suddenly saw my mother peeling potatoes. My mother peeled the potato buds, instead of cutting them off, she dug them out with a knife. At this moment, I am puzzled. Why didn't she just peel them off, but dig them out?
I help my mother cook, and then put potatoes and vegetables on the table. I took a piece of potato and put it in my mouth. I chewed it and thought, Hmm! How delicious! Potatoes and sprouts are really delicious. But that problem has been bothering me. I'd better wait for dinner and turn on the computer to check the information!
So I finished my meal quickly. I turned to my mother and said, "Mom, I want to check the information about potatoes."
Mother happily replied: "OK! Check it quickly! "
I ran to the computer, turned it on and plugged in the information about potatoes. The original scientific name of potato is potato. The reason why I want to dig out potato buds is because they are poisonous and must be eradicated.
"oh! I see, potato buds are poisonous and must be dug out! "
At this time, my mother also came up: "Yes! Poisonous people are like potatoes, and shortcomings are like potato buds. If the poison bud is dug out, then this person will have more advantages and fewer disadvantages, which means that he will be close to a perfect and healthy person. On the contrary, it will grow bigger and bigger, and finally the potatoes will not be eaten, and people will be poisoned. So, son, you have to dig out your "poison bud" and don't let it spread. "
This sentence has benefited me a lot. I believe I can do it.
8. Tear gas onion composition 500 words describe onions. At home, we often see onions in purple clothes and Christmas hats in the kitchen. Today, I will introduce onions to you.
Onion is a vegetable. Onion has a round body and a small pointed head, just like a child with a big head, wearing a cute pointed Christmas hat. Its belly is layered, which is very wonderful. However, it has one feature and its shortcomings-it smells choking and makes people want to cry. Some experts have tried. At the moment when 100 people wearing gas masks cut 100 onions in front of an elephant, the smell has made the elephant fall down, showing how powerful onions are.
Onions are also rich in nutrition. Generally, people with poor bones can enhance immunity and supplement calcium by eating onions. Girls who love beauty can eat onion beauty beauty, men can eat onion for aphrodisiac, and children can eat onion for brain strengthening. Onions are really calcium supplements for the elderly, beauty for girls, aphrodisiac for men and brain tonic for children.
But don't eat onions for the four benefits I mentioned above, because eating too many onions will bring people a sultry feeling, ranging from nosebleeds for three or four minutes to insomnia at night, which will not achieve the effects of supplementing calcium for the elderly, beautifying girls, strengthening yang for men and nourishing the brain for children. Isn't this a waste of money, energy and time? Although onions have many two sides, they are still rich in nutrition.