抄録
This paper develops a model of white clover-weed community competition. Field experiments were conducted to obtain the growth data of white clover and weed. The conventional Lotka-Volterra type competition model was modified to describe the clover-weed community competition.
Field experiments were set up on three plots of different density, 2kg/10a, 4kg/10a and 10kg/10a. White clover was seeded among the three plots. Seeding was done on 24 September 1996. The weed emergence rate was more restrained at the higher density plot during the following autumn and winter. However, weeds finally disappeared for all three plots until the following summer. The yield of white clover was saturated with clover seeding density of 4kg/10a. The model of the density effect of white clover was found to be 1/Wc=0.104+0.0011 Nc from the results of the field experiments.
The parameters of the modified Lotka-Volterra type competition model were determined by a Genetic Algorithm and the model successfully described qualitatively the characteristics of clover-weed competition.
