Allelopathy effects of C. Cathayensis exocarp extracting solution on seed germinating of four different kinds of crops

The author researches on the allelopathy effects of different viscosity (0~2.5g.mL^-1) C. Cathayensis exocarp extracting solution, on green bean, wheat, soy bean and corn seeds. By calculation of the pot plants morphological and physiological indexes, the result shows: the viscosity (0.1~0.5g.mL^-1) solution could greatly promote the seed germination. The effects of the viscosity (0.1g.mL^-1) solution on wheat and green beans are the most noticeable, with the increase of 38% and 24% respectively as compared to control groups, and reach the extreme noticeable level(P<;0.05); the viscosity (0.1~0.5g.mL^-1) solution increase the activity of a-amylase, suppress the activity of indoleacetic acid oxidase, increase the contents of the soluble sugar, amino acid, indoleacetic acid, decrease the contents of the starch and protein and accelerate the conversion rate of the starch and protein. The research shows: the low viscosity C. Cathayensis exocarp extracting solution could promote the seed germination, while the high viscosity solution would disdain the germination; the sensitivity of different crops towards the C. Cathayensis exocarp extracting solution is as follows: wheat >;green bean >; corn >;soy bean.