排序方式: 共有148条查询结果,搜索用时 0 毫秒
21.
朱以撒 《语文世界(高中版)》2013,(6):13
有一些古老的游戏在城市里悄然而逝了。在辽远的山乡,它依旧带着质朴的气息,为乡间的孩童接受和使用。捉迷藏,可以称得上蒙着阴翳之美的游戏。暮色下来了,草垛、灌木、篱笆、瓜棚,都可以形成目击的障碍,作为躲藏的居所。在昏黄并逐渐递进的浓郁气味里,寻找的难度随着目力的下降而增大。月亮从东山渐渐浮起,影像恍惚迷蒙,似花还似非花——如果他不可能找到一个藏匿者来替代他,他只能无休止地继续下去。 相似文献
22.
23.
Mycorrhizoremediation an enhanced form of phytoremediation 总被引:2,自引:0,他引:2
Khan AG 《Journal of Zhejiang University. Science. B》2006,7(7):503-514
Study of plant roots and the diversity of soil micro biota, such as bacteria, fungi and microfauna associated with them, is important for understanding the ecological complexities between diverse plants, microbes, soil and climates and their role in phytoremediation of contaminated soils. The arbuscular mycorrhizal fungi (AMF) are universal and ubiquitous rhizosphere mi- croflora forming symbiosis with plant roots and acting as biofertilizers, bioprotactants, and biodegraders. In addition to AMF, soils also contain various antagonistic and beneficial bacteria such as root pathogens, plant growth promoting rhizobacteria including free-living and symbiotic N-fixers, and mycorrhiza helping bacteria. Their potential role in phytoremediation of heavy metal (HM) contaminated soils and water is becoming evident although there is need to completely understand the ecological complexities of the plant-microbe-soil interactions and their better exploitation as consortia in remediation strategies employed for contaminated soils. These multitrophic root microbial associations deserve multi-disciplinary investigations using molecular, biochemical, and physiological techniques. Ecosystem restoration of heavy metal contaminated soils practices need to incorporate microbial biotechnology research and development. This review highlights the ecological complexity and diversity of plant-microbe-soil combinations, particularly AM and provides an overview on the recent developments in this area. It also discusses the role AMF play in phytorestoration of HM contaminated soils, i.e. mycorrhizoremediation. 相似文献
25.
本报道了韶关大学校内及学校外围的乔灌木植物的调查结果:共计有乔灌木植物(包括亚灌木和木质藤本)296种或变种,分隶80科。其中裸子植物8科16种,被子植物72科280种,另有珍稀濒危保护植物3种。 相似文献
26.
27.
刘冰清 《中华活页文选(初中版)》2010,(6):77-78
外婆家在乡下,一个偏僻的小乡村。到处是水田、沟渠和鱼塘,还有热情洋溢、精明能干的人们。外婆家的条件比其他人家都好,很早以前。就盖了一栋三层的小楼。小楼的后面是片小丘地.通向水田和鱼塘,那里十分泥泞,似乎只有两棵桑树,和一些灌木杂草,但那却是我儿时的乐园。 相似文献
28.
29.
秦牧 《少年文艺(南京)》2010,(4):6-7
人们常以赞美之笔,描绘南国的鲜花。可是,洋紫荆——原名“羊蹄甲”的花,却常常被人所忽略,这大概是因为它既不是草本植物,又不是灌木盆栽.而是生长在乔木上的缘故?是因为元宵花市上,从来没有人摆卖这种花?是因为在广州,它不过是极为寻常的街道树?尽管如此,洋紫荆仍不失为南国一种极为出色的鲜花。站在紫荆树下,但见树繁花,宛如千万彩蝶云集,好像走进了梦幻境界。 相似文献
30.
随着我国国民经济的飞速发展,人们对周围居住环境要求越来越高,对园林绿化也提出了新的要求。在现代化园林工作中,通常都是在绿化的基础上来实现城市美化,从而满足人类对园林的观赏需求。本文就灌木在园林绿化工作中的作用分析,提出了合理的配置方法,并对其需要注意事项进行了总结。 相似文献