The Primary Study of Development Process of Greenhouses

The appearance and development of protective culture (facilities horticulture) as an agricultural productive method served the royal and the nobility in ancient tine. In west since the sth emperor-Nero time of the Roman Empire, mica sheet and talcum sheet were used to cover the digged pit where the protective culture was carried on.In China the exact record was in B.C.33 Han Dynasty,burning firewood was used to warm the house, in which the vegetable production was conducted.Because of the affection of feudalistic and superstitions ideolgy-it was harmful to eat these vegetables,the production had not been developed for a long time.In Tang Dynasty(A.D700).it was recorded that not spring was used to cultiivate certain melon for the court. As to the history of cucumber production in greenhouses in Beijing (peking) it can be traced back to the middle period of Ming Dynasty(A.D.1600).We firmly believe that the appearance of these things should be earlier than these writing vecord.