【摘要】 煤矸石是采煤和洗煤过程中排出的固体废弃物,一方面占用了大量的土地资源,另一方面也成为固、液和气三害俱全的污染源,造成了一系列生态环境问题。以宁夏大武口洗煤厂煤矸石山复垦地为实验点,在自然状况下接种丛枝菌根真菌,研究其对煤矸石山土地复垦的生态效果。结果表明,菌根在煤矸石山土地复垦中具有较好的生态效果。接种菌根真菌13个月后能够提高植被成活率15%,促进植株生长和发育。植株生长快,植被的盖度高于对照9%,增加了生物物种的丰度。接种菌根后植株的侵染率高达90%以上,菌丝长度较对照伸长1.4倍,扩大了根系的范围,有利于维持该生态系统的稳定性。更多还原

【Abstract】 Coal spoil heaps can occupy large areas of land and cause serious environmental problems.This paper describes a study on the influence of arbuscular mycorrhiza application in the re-vegetation of coal spoil heaps under field conditions at Dawukou coal processing plant,Ningxia Province,north China.Inoculation with arbuscular mycorrhiza increased plant survival rate by 15%,promoted plant growth and enhanced plant cover by 9% and biodiversity within 13 months of inoculum application.The percentage of total root length of mycorrhizal plants colonized was up to 90% higher and the hyphal length on mycorrhizal plants was 1.4 times greater compared with non mycorrhizal controls.External hyphae can increase the volume of soil explored by the roots and help the plants to tolerate poor soil conditions to enhance the stability of plant cover in the re-vegetation of coal wastes.更多还原