protected cultivation.pptx greenhouse part 6th sem

Protected cultivation of green house

1. PROTECTED CULTIVATION

2. Greenhouse effect

3. Greenhouse effect Solar radiation mainly consists of short wave radiation. Earth’s atmosphere acts as blanket around earth which allows short wave to pass through and long waves to reflect back. Short waves reach the earth’s surface, most of which is absorbed by earth surface leading to rise in surface temperature. The reflected waves converts from short wave to long wave and hence gets reflected back to earth surface from earth atmosphere. The entrapping of reflected solar radiation from earth surface by atmosphere takes place. This phenomenon of increase in ambient temperature due to formation of blanket of greenhouse gases is called greenhouse effect.

4. Greenhouse technology

5. Greenhouse technology Technique or science of providing favorable environmental conditions for plant growth. This uses the phenomenon of greenhouse effect. Used to protect plants from adverse climatic conditions like wind, cold, precipitation, excessive radiation, excessive temperature, insects and diseases. This is possible by erecting greenhouse where environmental conditions are modified that one can grow any plant in any place at any time by providing suitable environmental conditions with minimum labour . This technology can improve production of crop throughout the year

6. Greenhouse cultivation

7. Greenhouse cultivation Also called as protected cultivation or surface covered cultivation Used for Adverse agro climatic conditions Growing certain crops round the year Growing export oriented crops Raising productivity of crops & increasing economic returns from small holdings.

8. Greenhouse

9. Greenhouse It is a structure with walls and roof made chiefly of transparent material like glass in which plants requiring regulated climatic conditions are grown. Miniature greenhouse is called cold frame. Interior of greenhouse exposed to sunlight becomes significantly warmer than external ambient temperature protecting its content in cold weather.

10. Greenhouse Greenhouse also called as Polyhouse Glass house Shade net house Indo – Israel projects Mainly aim at construction of sophisticated greenhouses RKVY projects Promotion of low cost green houses for vegetable production

11. Greenhouse Technical definition Framed or inflated structure Covered with transparent or translucent material Under partial or fully controlled environment Large enough to permit persons to work within it For growing crops To get optimum growth and productivity

12. Greenhouse It utilizes solar radiant energy to grow crops May have heating, cooling and ventilating equipments for temperature control. Greenhouse can be constructed in hilly areas and colder climatic conditions. Highly useful for raising seedlings in nurseries. For growing shade loving plants and indoor plants in urban areas. Urban agriculture is also called as roof top garden/ pot culture.

13. Abbreviations NHM – National Horticulture Mission NCPA – National Committee on use of Plastics in Agriculture PFDC – Precision Farming Development Centre RKVY – Rashtriya Krishi Vikas Yojana SAF - Society of American Florists RPRC – Regional Plant Research Centre IPM - Integrated Pest Management INM - Integrated Nutrient Management NFT – Nutrient Filling technique NBPGR – National Bureau of Plant Genetic Resources

14. Plants grown in greenhouse Vegetables Tomato, cucumber, lettuce, onion, capsicum, beans, peas, spinach, brinjal, pepper, chilies, okra, broccoli, cabbage, cauliflower Fruits Strawberries, grapes, citrus fruits Nursery Tobacco, coffee, tea, cocoa, rubber, forest species

15. Plants grown in greenhouse Ornamental crops Roses, medicinal plants, Chrysanthemum, carnation, gardenia, dahlias, gerbera

16. Types of greenhouse Greenhouse structures of various types are used for crop production. There is no single type of greenhouse which can be considered as best. There are advantages in each type for particular objective or application. Different types of greenhouses are designed to meet specific needs.

17. Greenhouse types Based on shape Based on utility Based on construction Based on covering material Based on cost of construction

18. Based on shape Lean to type Even span type Uneven span type Ridge and furrow type Saw tooth type Quonset type

19. Lean to type greenhouse

20. Even span type greenhouse

21. Uneven span type greenhouse

22. Ridge and furrow type greenhouse

23. Saw tooth type greenhouse

24. Quonset type greenhouse