【摘要】 以油页岩灰渣为主的固体废弃物的堆积,是茂名石油化工过程最突出的环境问题。堆积物往往呈现为酸度高、肥力低、土质差的特性,较恶劣的退化生态系统。在被测试的4种草本植物中,香根草(Vetiveria zizanioides)的成活率、覆盖度、生物量都是最高的,杂交狼尾草(Pennisetum americarum×P.purpureum)的成活率最低,但它的生物量和覆盖度都明显高于百喜草(Paspalum notatum)和钝叶草(Stenotaphrumsecundatum)。香根草的分蘖速度与株高生长也快于杂交狼尾草。施肥能显著增加植物分蘖数,提高生物量,其中钝叶草的生物量被提高的幅度最大,其次为杂交狼尾草和百喜草,香根草被提高的幅度最小。更多还原

【Abstract】 Four species of grasses were selected to rehabilitated the degraded ecosystem in oil shale spoil heap of Maoming, Guangdong. Among them, V zizanioides was assumed the highest survival rate, and then P notatum and S seaundatum. P americarum × P. purpureum was the least. The coverage and biomass of V zizanioides was also the highest six months after planting, and those of P americarum × P puipureum went up to the second place. Further more, V zizanioides produced more tillers and grew higher than P americarum × P purpureum did during the same period. Fertilizer application could significantly promote the increase of biomass and tillers number of the 4 herbs. Among these S secundatum was promoted the most, and V zizanioides the least. Results indicated that fertilization application is capable of ameliorating the grim habitat condition of oil shale spoil and V zizanioides had the least dependence on fertilizer.更多还原