By applying the method of water culture with 1/2 Hoagland solution,this paper

studied the autotoxicity of pepper plants’ fermentation broths and allelopathy regulation

on it by gingko leaves’ fermentation broths and decomposition solutions that the

fermentation broths were decomposed again after the leaves were removed.The results showed

that under the autotoxicity of pepper plants’ fermentation broths,their root vigors were

declined and the relative conductivity was aggrandized.Gingko leaves’ fermentation broths

enhanced the autotoxicity of pepper plants’ fermentation broths,and showed positive

correlation with its concentration.Gingko leaves’ decomposition solutions have alleviated

the autotoxicity of pepper plants’ fermentation broths.The alleviated effects depend on

the concentration of gingko leaves’ decomposition solution.