放牧场与割草场群落结构的比较

Comparison of the Community Structure in Grazing Pasture and Mowing Pasture

本文研究了放牧场与割草场的群落结构,结果表明:放牧场有被子植物78种,割草场有81种,群落地上现存生物量放牧场为133.828/m^2,羊草占17.74％;割草场为202.91g/m^2,羊草占28.77％。放牧场82.68％的生物量集中于0～10cm高处,而割草场为39.97％。放牧场群落的平均密度为728株/m^2,割草场为575株/m^2,两者的盖度、种的饱和度以及主要种群的高度都有差异。割草场的群落结构优于放牧场。

In this paper, the community structure in grazing pasture and mowing pasture were studied. The initial conclusion were as follows: 1. In the grazing pasture, there were 78 species of seed plants belonging to 63 genus, 27 families; but in the mowing pasture there were 81 species which belong to 63 genus, 22 families. In the grazing pasture the number of xerophyte increased, but the number of mesophyte decreased. 2. In the grazing pasture the above-ground standing biomass was 133.82±26.84g/m^2, in which Aneurolepidium chinense accounted for 17.74％; but in the mowing pasture the above-ground standing biomass was 202.91±44.63g/m^2, in which A. chinense accounted for 28.77％. The grasses and legumes were dominant in the commuities of both the grazing pasture and the mowing pasture. 3. It was clear that the above-ground biomass structures between the grazing pasture and the mowing pasture were significantly different. In the grazing pasture 82.68％ above-ground biomass was obtained from 0～10 cm height above ground surface; but only 39.97％ above-ground biomass from same height in the mowing pasture. 4. Mean density of the grazing pasture was 728 plants per squat metre, but 575 plants per square metre for mowing pasture. It was different in canopy cover plant, saturation intensity and height of main plant populations between the grazing pasture and the mowing pasture.