干旱复水对几种矿山生态修复植物群落构建影响

选用了8种北方生态修常用的乔、灌、草植物,研究在自然干旱下的株高、覆盖度变化情况。结果显示,前期黑麦草生长发育最快,覆盖度占优;紫花苜蓿在反复干旱后覆盖度明显占优,成为优势种;多花木兰株高受干旱影响显著,但覆盖度持续稳定增加;波斯菊株高受限明显,但发育至开花繁殖;乔木刺槐、臭椿零星存活,生长缓慢而稳定;早熟禾、蓝色矢车菊无法在循环干旱条件存活。

Dry and water influence on community building of kinds of mine ecological restoration plants

8 kinds of plants commonly used in ecological restoration in China Northern were selected to study the changes of plant height and coverage under natural drought. Lolium perenne L. had the fastest growth and development in early period, and dominated the coverage; Poa annua L. was clearly dominant in coverage after repeated droughts; the Magnolia multiflora plant height was significantly affected by drought, but the coverage continued to increase steadily; Cosmos bipinnata Cav was obviously restricted in plant height, but it developed to flowering and reproduction; the tree Robinia pseudoacacia Linn. and Ailanthus altissima survived and grew slowly and stably; Poa annua L. and Centaurea cyanus "blue"cannot survive in cyclic drought conditions.