THE COSTS AND OUTLOOK OF SOILLESS GULTURE

The water and fertilizers can be saved in the soilless culture systems. It prevents soil-born diseases con tamination, promotes early ripening and can get high yield as compare with ordinary soil culture. Vegetables can be produced with soilless culture without pollution. It is one of the revolutions in agriculture. The main systems of soilless culture are: bag culture system, rockwool, stationary water growing system, substrate-hydroponics, aeroponics, aerohydroponics etc.. The bag culture system is the cheapest and effectively used in China, it can be extended precedence over all others. Substrate-hydroponics can be used in some districts with good economic conditions. The initial investiment of NFT system is high, and the system consumes a lot of power. It would not be extended at commercial production in China at present time. But the scientific research of soilless culture should be strengthened.