Observation diary: the growth process of bean sprouts

I. Purpose of Observation

Through the observation of the growth process of bean sprouts, we can learn about the growth pattern of the plant and the conditions required, and provide references to the future scientific experiments and agricultural practices.

Two, observation time

March 1, 2023 to March 7, 2023, ***7 days.

Three, observation content and method

Preparation materials: choose some full green beans, a transparent plastic box, some absorbent paper, a small spray bottle and a section of cotton cloth.

Procedure: Soak the green beans in water for about 8 hours until they become slightly swollen. Then, drain the green beans and distribute them evenly inside the plastic box that has been lined with absorbent paper. Spread a cotton cloth over the surface of the green beans and spray them evenly with the right amount of water using a spray bottle. Place the plastic box in a ventilated area free from direct sunlight.

Observations: Observe the growth of the bean sprouts every morning and evening, and record the changes in their color, length, thickness, and so on. In order to record the growth process of bean sprouts more visually, I also used a camera to take photos of bean sprouts at different stages of growth.

Data analysis: By measuring the length, thickness and other indicators of the bean sprouts, as well as observing their color, texture and other changes, we can analyze the conditions required for the growth of bean sprouts and their growth rate.

Four, observation results and analysis

The first day: mung beans began to appear on the surface of a small crack, the interior showed a light green color. The length is basically unchanged.

The second day: the cracks in the mung beans became larger, and the green color became more and more obvious. In the sunlight you can see small buds trying to break through the mung bean skin. Not much increase in length.

Third day: the mung bean skin ruptures, and small buds protrude from the rupture, taking on a pale yellow color. There is a noticeable increase in length.

Day 4: The small shoots continue to grow and the color changes to dark yellow. At the same time, thin roots appeared near the ruptured mung bean skin.

Day 5: The small shoots grow many tiny leaves and the roots become thicker. Overall length growth is noticeable.

Day 6: The leaves gradually unfolded and took the shape of green bean sprouts. Length and thickness have increased.

Day 7: The bean sprouts have grown into full plants with clearly visible stems and leaves. The root system at the bottom is well-developed and the overall length has increased by about 70% compared to the original mung bean. The color appears light green. Through this experiment, I found that the faster growth rate of bean sprouts was between the fourth and sixth days, with the growth rate reaching its peak on the fifth day.

At the same time, I also noticed that in full sunlight, the leaves of the bean sprouts were able to unfold better and show a healthier green color. Whereas in rainy weather or lack of sunlight, the bean sprouts would be yellowish or pale in color. In addition, I found a relationship between the frequency of water spraying and the growth rate of bean sprouts.

With moderate water spraying, the bean sprouts grow faster; over-spraying can cause root rot, which affects the growth rate of bean sprouts; and under-spraying can make the bean sprouts dry and unable to grow properly. Therefore, controlling the frequency of water spraying is one of the important factors to promote the growth of bean sprouts.

V. Summary

Through the practice of this observation diary, I have a deeper understanding of the process of plant growth. By measuring the growth indicators of bean sprouts and observing the changes in environmental factors, I discovered the conditions of light, frequency of water spraying and other conditions required for the growth of bean sprouts as well as the changes in growth rate. These discoveries are not only important guidance for future scientific experiments and agricultural production