共查询到19条相似文献，搜索用时 0 毫秒
1.
从祁连山森林植被的现状出发,阐述了封山育林的重要性和迫切性,分析了森林恢复及封山育林的原理,探讨了植被恢复的方法和措施,为祁连山植被恢复提供了参考。 相似文献
2.
3.
封山育林是增加森林植被的重要营林措施。通过封山育林,不仅可以改善现有林分状况,而且可以在人工造林困难的立地上培育森林,恢复植被。介绍了封山育林的规划设计技术。 相似文献
4.
5.
6.
封山育林是一项投资少、见效快、能有效增加森林植被、提高森林质量的技术措施。阐述了封山育林的概念和特点以及封山育林的类型,重点介绍了适合山西省实施封山育林的5种模式以及如何加快封山育林进程的对策和措施。 相似文献
7.
封山育林是一项投资少、见效快、能有效增加森林植被、提高森林质量的技术措施.阐述了封山育林的概念和特点以及封山育林的类型,重点介绍了适合山西省实施封山育林的5种模式以及如何加快封山育林进程的对策和措施. 相似文献
8.
封山育林是加快江苏省高效生态林业建设步伐的重要途径 总被引：1，自引：0，他引：1
在分析森林植被与去年特大洪灾的关系关联系江苏省封山育林工作现状基础上，提出封山育林工作是加快江苏省高效生态林业建设步伐的重要途径，并对江苏省封山育林工作的制约因素、存在问题及其对策进行了探讨。 相似文献
9.
通过总结青海省多年来的封山育林实践经验和成效,说明封山育林作为一项实用技术,是培育森林,恢复生态平衡,扩大三江源森林植被的有效途经。 相似文献
10.
文章分析了东大山天然林区及周边森林植被的特征,生物多样性所受到的威胁,提出了扩大自然保护区、实现社区共管、进行封山育林等的植被保护措施。 相似文献
11.
豫西黄土丘陵沟壑区植被恢复与重建模式探讨——以三门峡城郊黄土丘陵沟壑区为例 总被引：1，自引：0，他引：1
裴卫国 《中南林业调查规划》2009,28(3):16-18,39
以生态恢复理论为指导,通过对豫西黄土丘陵区林草植被现状和治理模式的实地调研,研究和分析林草植被恢复与重建的机理,对植被恢复与重建模式进行初步探讨。 相似文献
12.
张伟光 《内蒙古林业调查设计》2010,33(5):115-116,119
安徽老嘉山省级森林公园位于安徽省明光市境内,森林植被多为人工针叶、阔叶纯林或针阔混交林,境内植物种类繁多,森林类型多样,植被丰富。但长期以来由于缺乏合理有效的规划,致使景观资源利用、开发的不够充分。文章通过对老嘉山森林公园植物景观提出规划构想,旨在提高老嘉山森林公园植物景观层次,为森林公园建设提供参考。 相似文献
13.
《Forest Ecology and Management》1997,93(3):245-260
Multivariate analyses were applied to forest canopy and understory data collected in 70 forest stands in the Mid-Boreal Upland Ecoregion in Saskatchewan. Random sampling of various types of forest focused on vegetation strata shown elsewhere to be of importance to woodland caribou (Rangifer tarandus caribou Gmelin). Cluster analyses revealed seven community types based on summer vegetation, and six community types when considering vegetation present during winter. Ordination by nonmetric multidimensional scaling suggested that two of the seven summer communities be combined, and that six community types be recognized in each season. Stands dominated by Populus tremuloides Michx. were all placed in one community type as were those dominated by Picea glauca (Moench) Voss. Young stands of Pinus banksiana Lamb. were placed in one community type, while the division of older stands was related to degree of canopy closure. The primary division among Picea mariana (Mill.) B.S.P. dominated stands was also based on the degree of canopy closure. Canonical correspondence analysis revealed strong relationships between the vegetation communities and data on canopy characteristics contained in the provincial forest inventory. In general, the techniques we employ provide a framework for objectively deriving vegetation communities relevant to wildlife species, and measuring their correspondence with readily available forest cover data. Specifically, we describe community types available to woodland caribou in our study area and their relationship to the provincial forest inventory. 相似文献
14.
于2004--2005年对云南元谋干热河谷捕食性昆虫多样性进行调查,报道元谋干热河谷捕食性昆虫89种(含待定种10种),其中印度暗带螳为中国新记录,云南新记录有11种;步甲科种类最丰富,占所有捕食性昆虫种类的19.1%.元谋干热河谷9种生境捕食性昆虫群落多样性的排序为:桉树印楝林>多树种混交的人工林>印楝林>明油子--扭黄茅灌草丛>云南松林>桉树新银合欢林>桉树林>牛筋条一黄荆林>余甘子一明油子灌木林.许多人工植被与自然植被捕食性昆虫群落之间相似性较高,反映出人工种植的乔木尚不能影响植物群落发展.人工封育措施对桉树印楝林的多样性保护起到了积极作用;草本层和地被物不发达、地表裸露是制约捕食性昆虫群落多样性的主要因素.提出对分布较狭窄的自然植被及草本层不发达的人工植被进行优先保护和修复的建议. 相似文献
15.
广东康禾自然保护区植物区系研究 总被引：1，自引：0，他引：1
根据对保护区的植被调查,分析了该保护区的植物区系、生活型谱和植被类型,结果显示该保护区植物区系组成以泛热带和热带亚洲成分最为丰富,各占30.5%和13.8%;生活型谱以高位芽植物占绝对优势,但比例略低于近纬度带的阴那山等地区;植被类型主要为亚热带常绿阔叶林,但因人为破坏较严重,现有植被主要为次生性较强的常绿阔叶林和针阔叶混交林。 相似文献
16.
南捧河省级自然保护区是以保护亚热带季风常绿阔叶林、中山湿性常绿阔叶林及珍稀濒危动、植物为主的森林生态类型的保护区。介绍了保护区植物区系及特点、植被分布规律、7个植被类型及珍稀濒危植物。 相似文献
17.
森林景观格局是城市生态建设和规划的重要内容[1].城市森林绿地是最重要的城市生态用地,对维持良好的城市生态环境具有至关重要的作用,也是改善和调节城市环境的最重要的生态源地.由于城市与城市郊区在空间上邻接,城郊的森林绿地也对城市发挥着重要的生态作用[2-3]. 相似文献
18.
Dynamics of forest biomass carbon stocks from 1949 to 2008 in Henan Province,east-central China 总被引：1，自引：0，他引：1
We estimated forest biomass carbon storage and carbon density from 1949 to 2008 based on nine consecutive forest inventories in Henan Province,China.According to the definitions of the forest inventory,Henan forests were categorized into five groups: forest stands,economic forests,bamboo forests,open forests,and shrub forests.We estimated biomass carbon in forest stands for each inventory period by using the continuous biomass expansion factor method.We used the mean biomass density method to estimate carbon stocks in economic,bamboo,open and shrub forests.Over the 60-year period,total forest vegetation carbon storage increased from34.6 Tg(1 Tg = 1×10~(12)g) in 1949 to 80.4 Tg in 2008,a net vegetation carbon increase of 45.8 Tg.By stand type,increases were 39.8 Tg in forest stands,5.5 Tg in economic forests,0.6 Tg in bamboo forests,and-0.1 Tg in open forests combine shrub forests.Carbon storageincreased at an average annual rate of 0.8 Tg carbon over the study period.Carbon was mainly stored in young and middle-aged forests,which together accounted for 70–88%of the total forest carbon storage in different inventory periods.Broad-leaved forest was the main contributor to forest carbon sequestration.From 1998 to 2008,during implementation of national afforestation and reforestation programs,the carbon storage of planted forest increased sharply from 3.9 to 37.9 Tg.Our results show that with the growth of young planted forest,Henan Province forests realized large gains in carbon sequestration over a 60-year period that was characterized in part by a nation-wide tree planting program. 相似文献
19.
以河南省第三次荒漠化沙化土地监测为依据，以生态恢复理论为指导，探讨河南省沙化土地治理中存在的问题，提出生物治理措施中要遵循自然法则和社会经济技术原则，以乡土植被恢复为主，乔灌草合理配置，建设多层次、多类型的防风固沙林与农林复合生态防护体系；并针对不同沙地类型提出相应的治理模型。 相似文献