四种地被植物耐践踏性研究

试验采用人工践踏法模拟生活中人为践踏对地被植物的影响，以4种不同的践踏程度（对比、轻度、中度和重度）作为试验变量，从形态和生理两方面指标综合评定匍枝委陵菜、紫花地丁、金叶过路黄和垂盆草4种植物的耐践踏能力。研究表明：（1）经盖度变化指标分析，4种植物耐践踏能力为金叶过路黄〉匍枝委陵菜〉紫花地丁〉垂盆草；（2）经叶绿素含量变化指标分析，4种植物耐践踏能力为匍枝委陵菜〉垂盆草〉金叶过路黄〉紫花地丁；（3）经地上生物量变化指标分析，4种植物耐践踏能力为金叶过路黄〉匍枝委陵菜〉紫花地丁〉垂盆草；（4）经丙二醛（MDA）含量变化指标分析，4种植物耐践踏能力为紫花地丁〉匍枝委陵菜〉金叶过路黄〉垂盆草。基于以上结果得出，4种地被植物的耐践踏性排序为：金叶过路黄〉匍枝委陵菜〉紫花地丁〉垂盆草。

Trampling resistance research on four species of ground cover plants

This experiment uses the artificial trampling method to imitate the influence in our daily life on the ground cover plants. With 4 different trampled degrees （contrast, mild, moderate and severe） as experiment variables, from two aspects of morphological and physi- ological indexes, a comprehensive appraisal of the trample resistance of Lysimachia christi- nae, Viola philippica subsp, munda, Lysimachia christinae, and Sedum sarmentosum con- siderations was conducted. The result reveals： （1）Coverage change index analysis in the trample resistance proves Lysimachia christinae 〉 Potentilla flagellaris 〉 Viola philippi- ca subsp, munda） Sedum sarmentosum. （2） The changes of chlorophyll content index analy- sis shows Potentilla flagellaris 〉 Sedum sarmentosum 〉Lysimachia christinae 〉 Viola philippica subsp, munda. （3） Above ground biomass change index analysis indicates Lysi- machia christinae〉 Potentilla flagellaris 〉 Viola philippica subsp, munda〉 Sedum sar- mentosum. （4） Malondialdehyde （ MDA ） content change index analysis agrees with Viola philippica subsp, rnunda〉 Potentilla flagellaris 〉 Lysimachia christinae〉 Sedum sar- mentosum. The above data comprehensive analysis concluded that the trample existence of four ground covers is in order of Lysimachia christinae 〉 Potentilla flagellaris 〉 Viola philippica subsp, munda〉 Sedum sarrnentosum.