Leymus chinensis population 基本例句 羊草种群 Cutting also reduced the population biomss in aboveground.刈割也使羊草种群地上生物量降低。 Comparative study on clonal and sexual reproductive traits of Leymus chinensis populations in different habitats.不同生境条件下羊草种群无性系和有性生殖特征的比较研究。