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Authoritative PPT Summary
"Absorption" PPT courseware
Part One: Situation Import
A farmer's proverb says: Whether there is a harvest or not depends on water; whether you harvest more or not depends on fertilizer. Can you understand the important role of fertilizer in agricultural production from the proverb?
learning target
1. Say through observation and experiment that green plants need inorganic salts for their lives.
2. Understand the important role of inorganic salts in plant life.
3. Tell the significance of nitrogen, phosphorus and potassium to plant life.
4. Explain the essentials and development prospects of soilless cultivation.
Absorption PPT, Part 2: Exploration Topic 1
Plant life requires a variety of inorganic salts
Use your brain
1. What is the main difference between fertile soil leachate and distilled water?
2. Observe the differences in the color, root system, stem and leaf growth of the two seedlings?
3. What enlightenment can you get from comparison?
Cooperation and exchange
Plants need inorganic salts for life; compared with distilled water, soil leachate is rich in inorganic salts; when plants absorb water, they also absorb inorganic salts dissolved in the water.
Plants require the most inorganic salts containing nitrogen, phosphorus and potassium.
Absorption PPT, Part 3: Exploration Topic 2
Soilless cultivation is a method of growing crops that does not rely on soil.
Do you think the plants in the picture can still grow without the soil?
Soilless cultivation materials collected and prepared before the exchange class
1. What is soilless culture? What are the main methods?
2. What principles are based on soilless culture?
3. What are the advantages of soilless cultivation compared with traditional crop cultivation?
4. What issues need to be paid attention to when carrying out soilless cultivation?
Soilless cultivation
It is to prepare nutrient solution according to the type, quantity and proportion of inorganic salts needed by plants, and use the nutrient solution to cultivate plants. There are various cultivation forms such as hydroponics, sand culture and gravel culture.
Absorption effect PPT, part 4: training to meet standards
1. The inorganic salts required for plant life are made of ( )
A. B. absorbed by roots from soil solution. leaves absorb from the atmosphere
C. D. absorbed by roots from within soil particles. Produced by the plant itself
2. The farmer’s proverb “A single crop depends on fertilizer” explains the importance of ( ) to plant life.
A.Moisture B.Inorganic salts C.Sunshine D.Air
3. In plant life, the inorganic salts containing ( ) are most needed.
A. Potassium b. Nitrogen, boron, iron C. iron d. Nitrogen, phosphorus, potassium
4. When plants are deficient in phosphorus, leaves often appear ( )
A. Yellow, brown B. dark green, purple
C. Brown, scorched D. light brown, brown
5. Inorganic salts containing potassium can make plants ( )
A. Lush foliage B. Stems strong
C. Seedling development D. Flowering and early ripening of seeds
Keywords: Beijing Normal University edition seventh grade biology PPT courseware free download, absorption effect PPT download, .PPT format;
For more information about the "Lifestyle Absorption Effect of Green Flowering Plants" PPT courseware, please click the "Lifestyle Absorption Effect of Green Flowering Plants ppt" tab.
"Absorption" PPT:
"Absorptive Effect" PPT Part 1 content: Scenario introduction In 2011, northern my country suffered a severe drought that had not happened in a century. The drought led to a reduction in grain production. Why did the severe drought seriously affect crop yields? Learning objectives 1. Explain the life needs of green plants through experimental observations. water..