Analysis on the long-term experiment and effects of no-polluted greenhouse vegetable production

The study is a long-term experiment of alternative technologies for greenhouse vegetable production by using EM compost manure and biological pest contro1．The paper is a summary of the experiment including the design of whole experiment，the application of EM compost manure and various biological pesticides and other IPM measures，the effects on vegetable yield，cost and benefit，soil properties and product quality．After the experiment，the uses of chemical fertilizer and pesticide have been reduced by 50％ and 30％ ，the crop yield and its benefit increased by 5％～10％ and 1％～6％ ．meanwhile the soil organic matter increased by about 0．14％ ～ 0.4％．