Greenhouse technology is the interesting procedure of giving positive conditions to the plants. Developing plants is both a craftsmanship and science.
Despite many difficulties man has learnt how to develop plant under regular habitat. Indeed, even in extraordinary unfavorable climatic conditions where no products can develop, man has built up a strategy for developing high esteem crops which is called as Greenhouse Technology.
This strategy is utilized to shield the plants from unfriendly climatic condition to the plants, for example, frosty, wind, precipitation, exorbitant radiation, extraordinary temperature, bugs and ailment.
In Green house innovation the ecological conditions are changed utilizing green house/glass house so one can develop any plant in wherever whenever by giving reasonable natural conditions less work.
Nurseries are surrounded or expanded structures secured with straightforward or translucent material sufficiently huge to develop edits under incomplete or completely controlled natural conditions to get ideal development and profitability.
Greenhouse technology is the unique technique of providing favorable conditions to the plants. Growing plants is both an art and science. In spite of many challenges man has learnt how to grow plant under natural environment.
Even in extreme adverse climatic conditions where no crops can grow, man has developed a method of growing high value crops which is called as Greenhouse Technology.
This method is used to protect the plants from adverse climatic condition to the plants such as cold, wind, precipitation, excessive radiation, extreme temperature, insects and disease.
In Green house technology, the environmental conditions are modified using green house / glass house so that one can grow any plant in any place at any time by providing suitable environmental conditions with less labour.
Greenhouses are framed or inflated structures covered with transparent or translucent material large enough to grow crops under partial or fully controlled environmental conditions to get optimum growth and productivity.
Definition of Greenhouse Technology
A Greenhouse is a glass structure for growing southern trees and shrubs that cannot endure the climate of a given locality, particularly in the winter. Most often grown are evergreens (for example, palms), citrus plants (lemon, orange), fruit and berry plants, and flowering plants.
Plants raised in greenhouses during the summer include those that require special conditions of temperature, light, and air. Solar, steam, water, electrical, or hot-air heating is used to maintain the necessary temperature (1°C and higher).
There are cool (1°–8°C), warm-temperate (8°–15°C), and tropical (15°–26°C) greenhouses. One form of greenhouse is the lean-to, in which the roof has a single slope, facing southward with an angle of inclination of 30°–45°. Another type, the even-span greenhouse, has a two-sloped roof, with internal supports.
The slopes face west and east and have an angle of inclination of 24°–28°. Sometimes two to five or more even-span greenhouses are combined into one or are connected to each other by chutes supported from the bottom. There is also a greenhouse in the even-span style that does not have internal supports.
In some greenhouses the plants are set in benches, in others the plants are raised directly in the ground. Sometimes both methods are employed. Winter greenhouses have permanent glass and are used year-round; spring greenhouses have removable frames or a completely open roof.
The foundation of a greenhouse is made of brick, stone, or wood, and the floor is earthen. The single frames are made of wood or metal, and double-thick glass is used (thickness, 2.7–3.3 or to 4–5 mm).
Ventilation is achieved by means of air vents, fanlights, or individual detachable frames. In large greenhouses, a water supply line and a device for pouring warm water are constructed; sprinkling or subsoil irrigation is used.
In industrial greenhouses, the basic agricultural work (soil cultivation, sowing, planting, plant maintenance, control of pests and plant diseases) is done with farm machines and implements. Loads are transported inside the greenhouse by rail and on small trucks.
A greenhouse should be constructed so that it permits the least heat transfer per sq m of useful area, maximally receives and uses the light and heat from natural sources, regulates the temperature and the moisture content of the air and soil, permits the mechanization of labor, and yields maximum production with minimum running costs.
Many large greenhouses are used for industrial (growing early vegetables and fruits, cultivating ornamentals) and scientific purposes.
Advantages of GreenHouse Technology
1) 10-12% expansion in yield contingent on the sort of nursery, kind of product, natural control offices
2) Reliability of crop increases in green house cultivation and unwavering quality of harvest increments in green house development
3) Extends your developing / growing season
4) Expanding the variety among your produce
5) Limit outside dangers / external threats to your crops and yield
Disadvantages of Green House Technology
1) High forthright and working costs
2) Lack of Pollination
3) Careful precautions must be taken to eliminate any pests or diseases to make sure your next crop won’t be affected.
4) It is conceivable to get back the venture on nursery inside a time of 3-5 years duration.
5) The achievement of greenhouse relies upon the size of the undertaking.
6) Least suggested venture with right financial suitability and long haul maintainability is around 1 to 2 years.
It is possible to get back the investment on greenhouse within a period of 3-5 years period. The success of green house depends on the scale of the project. Minimum recommended project with right economic viability and long term sustainability is around 1 to 2 years.
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