How much is the price of sunflower seeds per jin? How long does it take to sprout? Why do you follow the sun?

Sunflower, also known as Chaoyang Flower, gets its name because its flowers often face the sun. Sunflower seeds called sunflower seeds, often fried as a snack to eat, delicious, can also extract sunflower seed oil for consumption. So, how much is the price of sunflower seeds per jin? How long does it take to sprout? Why do you follow the sun? It is understood that the price of sunflower seeds is 10 yuan per jin, the price will be different in different regions.

How long does the sunflower seed sprout?

Sunflowers can germinate in 6-10 days when the temperature is about 25 ℃. Pay attention to the low temperature, the number of days will increase, on the contrary, the number of days of temperature increase will decrease. However, it should be noted that the sowing temperature should be neither lower than 20 ℃ nor higher than 30 ℃.

Why do sunflowers follow the sun?

1. All sunflowers have a substance called auxin, which can make plants grow tall and big, but they are timid and afraid of the sun, so as soon as they see the sun, the auxin in the neck of the sunflower runs to the side of the backlight to hide. However, there is more and more auxin on this side of the backlight, which causes this side to grow very fast, while the sunny side grows more slowly, so the plant bends to the bright side. As the sun moves in the air, plant auxin is like hide-and-seek, constantly moving with the sun on its back.

two。 When the sun rises, the east side of the green sunflower is exposed to sunlight, so that the exuberant tip young stem distributes more auxin in the west side of its backlight. The cells on this side elongate longitudinally and grow faster, resulting in the young stem bending toward the slow-growing east, that is, the sunflower tip (disk) bends eastward in the morning. As the sun moves in the air and changes the direction of the light, the top of the sunflower (disk) also changes direction. When noon comes, the sunflower is upright, and in the afternoon it bends to the west, which shows the phototropism of the bending of the stem top.

3. Therefore, the plant will bend to the light side, and as a result, it will produce the natural phenomenon that the disk follows the sun. This property is called phototropism in botany, and it is also called positive phototropism because it is always facing the sun.

4. As the saying goes, the growth of all things depends on the sun. Without the sun, all plants and creatures on the earth cannot survive. In addition to sunflowers, there are many other plants whose flowers or leaves can also grow toward the sun. is it also because auxin is afraid of light? No, they grow to the sun in order to get more sunlight and produce more nutrients so that they can grow better.

Time: 2019-03-20 Click: