Abstract:

Abstract：Five vegetable rotation models, shallot - radish – Chinese cabbage - pepper, edible chrysanthemum - lettuce - pepper, pepper - lettuce - pepper (CK), cauliflower – pepper and shallot- spherical fennel - lettuce – pepper ,were designed for finding the suitable rotation models for greenhouse organic vegetable. The research contains the effects of five vegetable rotation models on soil microbial quantity . The results showed that: The number of micro-organisms of soil in different treatments had also changed. After two years of vegetable rotation, the number of bacteria of control was decreased, but the amount of fungi was increased. Edible chrysanthemum - lettuce - pepper promoted the propagation of soil beneficial microorganisms and inhibited the propagation of the harmful fungi at the same time. Based on the microorganism, the way of edible chrysanthemum - lettuce – pepper was the best.