"Application of the Principles of Photosynthesis and Respiration" PPT courseware

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"Application of the Principles of Photosynthesis and Respiration" PPT courseware

Part I: Application of photosynthesis principles in production practice

In the severe winter, the fresh vegetables (off-season vegetables) we can eat are cultivated in greenhouses using the principle of photosynthesis. So why do farmers use greenhouses to grow vegetables?

discuss

Explain how the control system in the greenhouse regulates carbon dioxide concentration

Carbon dioxide is the main raw material for plant photosynthesis, and appropriately increasing the concentration of carbon dioxide in the greenhouse will enhance photosynthesis.

When the carbon dioxide content in the air increases to 0.5%-0.6%, the photosynthesis of crops will be significantly enhanced, and the yield will be greatly improved. This method of using carbon dioxide for crops is called air fertilizer, and carbon dioxide is called "aerial fertilizer."

think about it

Describe and try to draw a picture of the production and labor of modern farmers. Imagine how modern farmers or future farmers living in a high-tech society perform production and labor?

PPT on the application of the principles of photosynthesis and respiration, Part 2: Application of the principles of respiration in production practice

contact life

When storing fruits and vegetables, _______ and _______ methods are often used to extend the storage time of seeds, fruits and vegetables.

Question: We need to reduce the intensity of respiration when storing agricultural products. So when planting crops, is the lower the intensity of respiration, the better?

Generally speaking, when the oxygen supply to the roots of crops is sufficient, respiration is strong, which is beneficial to the growth of roots and the absorption of nutrients such as inorganic salts.

think about it

Hami melons in Xinjiang are particularly sweet. Why is this?

The days in Xinjiang are long, and plants accumulate a lot of organic matter through photosynthesis. The temperature difference between day and night is large, and the organic matter produced by photosynthesis is far more than the organic matter consumed by respiration, so the content of organic matter, that is, sugar in the fruit is relatively high.

Application PPT of the principles of photosynthesis and respiration, part 3: exercises

1. The so-called "gas fertilizer method" refers to the method of adding ( ) gas to crops in greenhouses and greenhouses to achieve high yields.

A. Nitrogen dioxide B. Carbon dioxide

C. Oxygen D. All of the above

2. When using plastic greenhouses to cultivate fruits and vegetables, the following measures can achieve the effect of increasing yield and quality: ( )

① Increase the night temperature ② Reduce the night temperature ③ Increase the concentration of carbon dioxide ④ Increase the concentration of oxygen ⑤ Highly dense planting

A, ①③④ B, ①④ C, ③④⑤ D, ②③

3. In order to increase the yield of crops in the greenhouse, which of the following measures is correct ( )

A. Increase the temperature appropriately during the day and lower the temperature appropriately at night.

B. Lower the temperature appropriately during the day and increase the temperature appropriately at night.

C. Lower the temperature appropriately during the day and night

D. Increase the temperature appropriately during the day and night

Keywords: Jiangsu Education Edition seventh grade biology PPT courseware free download, application of photosynthesis and respiration principles PPT download, .PPT format;

For more information about the PPT courseware "Photosynthesis and Respiration of Green Plants and the Application of the Principles of Photosynthesis and Respiration", please click the "Photosynthesis and Respiration of Green Plants ppt Application of the Principles of Photosynthesis and Respiration" ppt tag.

"Application of the Principles of Photosynthesis and Respiration" PPT:

"Application of the Principles of Photosynthesis and Respiration" PPT Part One Content: Situation Introduction Intelligent air fertilizer machine keeps greenhouse vegetables safe in winter. In the process of growing greenhouse vegetables, what is the principle that increasing the application of air fertilizer can increase production? Learning Objectives 1. Give examples of green plant light...

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Update Time: 2024-09-08

This template belongs to biology courseware Jiangsu Education Edition Seventh Grade Biology Volume 1 industry PPT template

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