Measurement was carried outfor five times. (2)Analysis of variance indicated that relative yield(biomass)total(RYT)and competitive balance index(CBI)are sens-itive to total densities,proportions and durations.

• 方差分析表明,相对总生物量(RYT)和竞争平衡指数(CBI)对总密度,混播比例和生长时间的反应敏感。