割草对人工羊草草地群落与主要种群数量特征的影响

Effect of Mowing on the Quantitative Character of the Community and Main Populations of the Seeded Aneurolepidium chinense Grassland

In this paper, the quantitative character changes of the community and main po- pulations under mowing influence are analyzed based on five years research. The main conclusions are as follows. 1. A statistic recording of seed plants for 5 years in the experimental plots were made. There are 46 species which belong to 37 genera in 18 families. There are differences in different years. 2. The above-ground biomass of the community under the different treatments and in different years are different. The bio- mass reached the highest at post-fruiting period, and the highest production was the fifth year after planting. The density of the community was the highest in 1984, and lowest in 1986. 3. The above-ground biomass of A. chinense individuals of various treat- ments gradually decreased from 55.20-134.53 g/m~2 in 1983 to 3.66-17.16 g/m~2 in 1987, which is lower than that control (35.48 g/m~2). The density, plant height and mean individual weight of A. chinense declined obviously. 4. The above-groung biomass of A. scoparia and A. sieversiana under different treatments increased year by year. The den- sity, plant height and mean weight of individual were different in various years, but they were seemly not effected by mowing.