Greenhouse cultivation is currently practiced in more than fifty countries in climatic conditions where there is scarcity of potable water or the availability of saline water, to raise disease-free trees or to grow high selling value crops that require special care. A greenhouse is a specific type of structure with a frame covered with plastic, polythene or glass transparent or translucent covering in which the internal environment can be changed according to the needs of that crop. Its main advantage is that perennial production of flowers or ornamental plants and vegetables can be obtained from a small area. Also, good quality flower plants can be raised.
Greenhouse is considered a very important organ for flower cultivation in Ahmedabad, Gujarat at present stage. Climatic factors such as high summer temperature, erratic rainfall, excessive intense sunlight and fluctuation in humidity percentage in our state have adverse effects on flower crop production. In such anomalous conditions, good quality pest-free flowers can be obtained by controlling indoor environmental factors through greenhouses. The price of flowers produced in winter season is very less than that of summer season. So, in summer season, more market value can be obtained by cultivating cut flowers through greenhouse.
Selection of site: While selecting the site for the greenhouse, the slope of the land should be such that rainwater drainage is good during monsoon, drainage system should also be provided for drainage of rainwater, the quality of irrigation water should be good and the greenhouse should always be away from large trees and buildings so that Do not block sunlight.
Orientation: A single span greenhouse can be erected in any direction. But multi span greenhouses are always erected in north-south direction. So that every part of it can get sunlight satisfactorily.
There are two important factors affecting green house technology in India. The first sphere is the primary capital investment in the construction of the green house. Another aspect depends on the systematic preservation of the crops grown in it. Currently, the use of plastic Tarpaulin instead of glass has increased in the construction of green houses. The use of plastic Tarpaulin reduces the weight of the green house frames.In Major cities Gujarat like Ahmedabad, there are many Tarpaulin Manufacturer provides high quality green house cover.
Tomatoes can be harvested eight times in a year In greenhouse technology, crops can be harvested more than once a year as the environment can be controlled. During a research, tomatoes were harvested eight times in a year in a greenhouse. In this research, the annual yield of tomato was obtained as 34 kg per square meter. Two hectares of open field requires only one man. While 8 to 10 people are needed per hectare in a green house, green house technology has the potential to provide more employment. At the initial stage of green house more investment is required. However, after 2 to 3 months in the green house, the income starts getting. Factors controlling the atmosphere are ventilation (air movement) cooling-heating (cold-heat) humidity or non-moisture environment increased carbon dioxide light control.
