"Application of the Principles of Photosynthesis and Respiration" PPT

Description

"Application of the Principles of Photosynthesis and Respiration" PPT

Part One: Situation Import

Intelligent gas fertilizer machine keeps vegetables in greenhouses safe in winter

In the process of growing vegetables in greenhouses, what is the principle of increasing yield by adding air fertilizer?

learning target

1. Give examples of the application of the principle of photosynthesis of green plants in production practice

2. Give examples of the application of the principle of green plant respiration in production practice

Application PPT of the principles of photosynthesis and respiration, part 2: theme exploration

Explore theme one

Application of photosynthesis principle 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 what is the principle behind farmers using greenhouses to grow vegetables?

Discussion How does the control system in the greenhouse control 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% to 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."

Explore theme two

Application of the principle of respiration in production practice

Factors affecting plant respiration:

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

Why are apples from the north sweeter than apples from the south?

This is because during the peak growth period of apples, there is a large temperature difference between day and night in northern areas. The photosynthesis of plants accumulates far more organic matter than the organic matter consumed by respiration, resulting in a higher content of nutrients in the fruit.

Are you right?

expand

Using the principles of photosynthesis and respiration, analyze why the cantaloupe produced in the Hami region of Turpan, Xinjiang is so sweet?

Answer: There is a large temperature difference between day and night in Xinjiang. The organic matter accumulated by plant photosynthesis is far more than the organic matter consumed by respiration, so the content of nutrients in the fruit is relatively high.

When using plastic greenhouses to cultivate fruits and vegetables, the night temperature should be appropriately lowered to reduce the consumption of organic matter by plant respiration to achieve the purpose of increasing yield and quality.

PPT on the application of the principles of photosynthesis and respiration, Part 3: Class summary

1. Application of photosynthesis principle in practice:

(1) Increase the concentration of carbon dioxide

(2) Meet water needs

(3) Increase the lighting time

2. Application of the principle of respiration in practice:

(1) Enhance respiration: increase temperature or water content of cells

increase oxygen concentration

(2) Reduce respiration: reduce temperature or water content of cells

Reduce oxygen concentration

PPT on the application of the principles of photosynthesis and respiration, part 4: training to meet standards

1. When the stems and leaves of overly densely planted crops are severely shaded, it will cause yield reduction. The main reason is ()

①Photosynthesis is greater than respiration

②Respiration is greater than photosynthesis

③The accumulation of organic matter is greater than the consumption of organic matter

④The consumption of organic matter is greater than the accumulation of organic matter

A.①③B.②④C.①④D.②③

2. A large amount of heat will be produced in the grain pile. Which physiological activity of the plant is related to this? ( )

A. Respiration B. Photosynthesis

C. Transpiration D. Growth

3. Apples produced in northern my country are sweeter than those in the south. The reason is the temperature difference between day and night in the north ( ) and the intensity of photosynthesis ( ) and the intensity of respiration.

A. Small, larger than B. Big, smaller than

C. small, smaller than D. big, larger than

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 courseware:

The first part of the PPT courseware "Application of the Principles of Photosynthesis and Respiration": Application of the Principles of Photosynthesis in Production Practices In the severe winter, the fresh vegetables (off-season vegetables) we can eat are the products that people use the principles of photosynthesis to produce Cultivation in greenhouse..

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Update Time: 2024-11-21

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

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