共查询到20条相似文献，搜索用时 140 毫秒
1.
谷子熟了，黄了，田野被一次次收拾干净，眼下又葱茏满目了。那条小河，干了，落了底，可是春雷一惊，又涨满水了，许多老人，渐渐不出村口了，但那岗子那坡依然种下了麦子、大豆或棉花芝麻，年年开花，年年结籽，扛着锄头的姿势没有改变过，惟犁手换了一茬又一茬，可是这里的一切似没法改变，种子一回回播进土里，镰刀又一季季出示锋芒。石榴树上的花点种无数的火，它燃烧着人们的激情和梦幻。到了秋天，那压枝的石榴就咧开嘴笑了，那金黄的草垛就在新楼的屋檐下堆起童话的尖屋顶了，那里能听出牛的呼息和田鼠咀嚼的声音，鸭子和鸡将蛋产在… 相似文献
2.
为期一天的斤直属单位组织人事工作座谈会，现在就要结束了。会上，斤直属单位就近年来的组织人事工作作了汇报，智华同志对人事教育处两年来的工作进行了总结回顾，分析了存在的问题，提出了今后工作的建议和打算，我完全同意。这次会议时间虽短，内容丰富，总结了工作，交流了经验，提出了建议，畅谈了设想，达到了预期的目的。下面，我讲三个问题： 相似文献
3.
4.
雪峰山在流泪莽莽雪峰山，横亘在湘西的版图上。最高峰帽子山海拔1484．２米，平均海拔1150米；南北长40公里，东西宽8公里，堪称世界名山。区域内木本植物90余科700多种，其中省级以上重点保护的珍稀树种50多种，森林覆盖率94．１%。同时，野生动物资源丰富。本来，山青水秀，生态环境十分优美。但是，自从1992年成千上万的采金人进山开采黄金以后，植被、水源、耕地、生态逐渐遭到了破坏。当地农民、政府和有关部门强烈反映：“山上光了，水井干了，稻田荒了，溪水黄了，鱼虾死了，水利设施坏了，电不能发了，疾病多了，妇女不生崽了，山… 相似文献
5.
昔日童山濯濯，今日郁郁葱葱．不少岩石裸露的地方，如今被绿荫覆盖，光山秃岭上肆虐的洪水也被茂密的松林客留。山上有了林，山区也有了水：有了林，招来了鸟，引来了兽，百草复生，鸟语花香，这就是飞播区的自然面貌。通过飞播造林，绿化荒山，不仅有效地改变了大自然的生态环境，而且使群众看到了兴林致富的希望。 相似文献
6.
7.
以前的永兴村是吉林省辉南县的一个偏僻山村．大多数村民是解放前从外地逃荒来的，是出了名的穷村。现如今，永兴村集体净资产达到2000万元，农民人均收入稳定在4500元，村里改造了电路。兴修了水库，办起了学校，成立了卫生所，村民看上了有线电视，装上了程控电话，吃上了自来水，是当地有名的新农村。 相似文献
8.
2002年初，长沙县林业局调整领导班子后，在局长周海林的带动下，与时俱进，开拓创新，打造出一支一流的队伍，创造了一流的业绩，开创了长沙县林业工作新局面。抓队伍建设，提高整体素质去年年初，县林业局本着积极、稳妥、精干、高效的原则，进行了机构改革。通过深入的调查和广泛的征求意见，对内设机构、二级机构和派出机构的干部职工进行了全面的调整和交流，从而调出了团结，调出了干劲，调出了新面貌。同时，局党组充分认识到提高干部职工的文化素质的重要性和紧迫性，在全系统努力营造良好的学习氛围，调动干部职工的学习积极性。为… 相似文献
9.
10.
11.
本文记述了中国松叶蜂昆虫两新种,马尾松吉松叶蜂和油松吉松叶蜂。文中附有形态特征图4幅。 相似文献
12.
13.
一个世纪来黑龙江省森林景观动态研究 总被引：1，自引：0，他引：1
With the help of GIS tool of ARC/INFO,ARCVIEW and FRAGSTATS,the map of forest resource distribution of Heilongjiang Province was analyzed in 1896,1949 and 1981.Using total area,mean patch size,patch density,coefficient of patch size variation,mean patch fractal dimension and mean shape index,we studied the change of forest landscape pattem and the change of each patch types in this region.As a result,the total area of forest landscape and mean patch size decreased sharply,the quantity and density of patches increased,the juxtaposition of patches weakened,the shape of patch tended to become regular,and the border of patch simplified.All these showed that the forest landscape of this area tended to fragment gradually,and the fragment of Korean pine forest is the severest.the diversity of whole forest landscape and the eveness of landscape types distribution reduced gradually.Human impact,instead of climate change and forest community succession,is the most important reason for such dramatic chages. 相似文献
14.
Saponins are a group of naturally occurring plant glycosides, characterized by their strong foam-forming properties in aqueous solution. The presence of saponins has been reported in more than 100 families of plants out of which at least 150 kinds of natural saponins have been found to possess significant anti-cancer properties. There are more than 11 distinguished classes of saponins including dammaranes, tirucallanes, lupanes, hopanes, oleananes, taraxasteranes, ursanes, cycloartanes, lanostanes, cucurbitanes and steroids. Due to the great variability of their structures, saponins always display anti-tumorigenic effects through varieties of antitumor pathways. In addition, there are a large amount of saponins that still either remain to be trapped or studied in details by the medicinal chemists. This article reviews many such structures and their related chemistry along with the recent advances in understanding mechanism of action and structure–function relationships of saponins at the molecular and cellular levels. These aglycones have been described and their classification and distribution have been listed in the review. Some special saponins with strong antitumor effects have also been exhibited. Ginsenosides, belonging to dammaranes, have been found beneficial targeted on inhibition of tumor angiogenesis by suppressing its inducer in the endothelial cells of blood vessels, and then on prevention of adhering, invasion, and metastasis of tumor cells. Dioscin, one of the steroidal saponins, and its aglycone diosgenin also have been extensively studied on its antitumor effect by cell cycle arrest and apoptosis. Other important molecules discussed include oleanane saponins such as avicins, platycodons, saikosaponins, and soysaponins along with tubeimosides. 相似文献
15.
16.
论人本主义管理理念 总被引：2，自引：0，他引：2
黄艳丽 《甘肃林业职业技术学院学报》2006,(1)
组织最重要的资源是人,要实现组织目标就要有合理的管理,人本主义管理理念就是在管理过程中以人为本,以尊重人格,突出柔性管理,关心员工发展的双赢策略,确立员工的主人翁地位和注重员工培训为人本主义管理的思想内容。 相似文献
17.
本文通过对哈尔滨工程大学绿化现状的分析,在规划中,提出了"一园、二区、三空间、四廊道、六组团"整体绿化景观,使设计更科学、布局更完整、结构更清晰。在新校区规划为体现学校从"发现—研究—收获"的这一发展历程。提出"新校区、新建筑、新景观"的思想,设计出简洁、现代、生态且充满创造精神的新景观。结合不同的区域特点分别提出了详细设计方案,展现出知识不断求索创新、积累升华的过程。 相似文献
18.
本文通过对中国林业的现状及存在的一系列生态、环境、经济和社会问题的分析讨论,重点强调了森林及整个林业在我国社会和经济发展中的重要作用。同时,作者提出可持续发展,特别是林业的可持续发展是解决我国当前生态环境和经济社会问题的关键和必由之路。并从生态学、经济学和社会学的角度,论证和阐述了林业可持续发展的目标、准则,以及我国林业的可持续发展战略。参11。 相似文献
19.
《Scandinavian Journal of Forest Research》2012,27(1-4):399-415
Decomposition of Scots pine needle litter originating from five stands treated with different amounts of nitrogen fertilizer was measured over a 4‐year period in a mature Scots pine forest. The litter types, which differed in initial concentrations of nitrogen, phosphorus, potassium, and sulfur, but not in gross organic composition, were studied with respect to mass loss, ingrowth of total fungal mycelium, and net release of nutrients. During the first year of decomposition, rates of mass loss and ingrowth of fungal mycelium were highest in the nutrient‐rich litter. Phosphorus concentration was found to be the main factor affecting mass‐loss rate, and the rate of fungal ingrowth was positively correlated with initial nitrogen concentration. After this initial period, decomposition rates decreased, and after 4 years, accumulated mass loss and amounts of fungal mycelium were similar in all five litter types. These findings may be due, in part, to a lower rate of lignin decomposition in nitrogen‐enriched litter. Of the elements, potassium and magnesium were most rapidly lost from the litter, and their release was most pronounced during the first year. Calcium release was proportional to the loss in organic matter. Initially, the release of nitrogen and phosphorus was positively related to their concentrations in litter, however, during later stages of decomposition the differences among litter types levelled out. There was a tendency for concentrations of all elements, except nitrogen, in the different litters to approach similar levels as decomposition proceeded. Thus, after 4 years the nutrient composition of the various litter types was very similar, except for higher nitrogen concentrations in the originally most nutrient‐rich litters. The importance of the results in terms of substrate quality in fertilized as well as in non‐fertilized forests is discussed. 相似文献
20.
竹业引领人类生活更美好 总被引：4，自引：4，他引：0
文章介绍了竹材在建筑、家具、交通、日用品等领域的应用现状,分析了竹材在性能、成本、资源量及环保等方面具有的多种优势,以及木材、塑料、钢材、陶瓷应用局限性和劣势,提出了竹木并举、以竹代塑、竹钢协同、竹瓷互补潜在的创新应用方向。在当前化石能源日益枯竭、环境压力越来越大的情况下,发展竹产业、应用竹产品是一项改变人类生活、促进绿色发展的重要举措,是健康生活、生态人居、绿色发展的正确方向。 相似文献