共查询到20条相似文献，搜索用时 203 毫秒
1.
2.
3.
4.
林木种苗工作是林业生态建设中的一项基础工作,以苗木培育为基础推动生态建设意义重大。文章通过调研,简述了豫西黄土丘陵山区三门峡市的林木种苗生产、基地建设、种苗工程现状,分析了种苗工作中存在的主要问题,提出了发展措施。
相似文献
5.
6.
7.
淮南市绿化委员会办公室 《中国城市林业》2005,3(3):29-29
到3月底,舜耕山南坡植被恢复暨舜耕山南坡义务植树基地建设一期工程,经市林业局和各施工单位的共同努力,已顺利完成树木栽植任务。共栽植红枫、石楠、三角枫、五角枫、铅笔柏、夹竹桃、紫叶樱、枫香、雪松、女贞、侧柏等21个品种、共8.3万余株绿化苗木。充分体现了以红色为主,黄绿兼顾,主题鲜明,绿化、美化有机结合的设计理念。
相似文献
8.
9.
通过读图认识一个科学领域是借助别人的眼睛看世界的一种方法。本文从美国、澳大利亚、德国和日本四个国家的相关图片资料中,通过摄影家的眼睛,透过照片,直观反映城市林业建设现状与历史,帮助解读较深奥的学术理论、理念和技术,起到文字无法替代的作用。本刊编辑部收集的图册中,以城市规划为目的航拍图片,为我们从宏观角度了解城市生态建设全貌提供了证明。一些专业性图册,如树文化、住区绿化、大学校园绿化、园林绿化以及木房子(含树上居室)等从不同侧面丰富了城市生态建设内涵,为我们提供了许多城市生态建设信息。下面根据所收集的图片信息分别介绍4个国家的城市森林建设特点。
相似文献
10.
文章介绍了一种用于河道治理与建设的节约型生态驳岸的设计内容与构建方法,采用模块搭叠方式构建成的新式驳岸克服了传统驳岸的诸多缺陷,具有坚固、节约、生态、灵活、富有生机等多种优点。
相似文献
11.
绿化苗木是国土绿化、美化环境、改善生态和发展农村经济的重要物质基础,有着广阔的市场前景。本文在对庐江县绿化苗木发展现状作全面调查的基础上,对绿化苗木发展的可行性与必要性进行了认真分析,并提出发展绿化苗木产业的对策。 相似文献
12.
13.
At present, China has the highest afforestation rate of any country or region in the world, with 47,000 km2 of tree plantations undertaken in 2008. While the prominent role of the central government’s afforestation programs is well-known, little is understood of how the system of tree seedling production and distribution supports afforestation efforts. More importantly, little attention is paid to how small-scale farmers access high quality tree germplasm in the afforestation programs. This paper examines the seedling supply system in the west of Yunnan Province in China by focusing on the three types of tree nurseries (state, collective and individual) that are being operated for the development of smallholder forestry especially in the context of decentralization. The research reveals that forestry decentralization has provided support for smallholder access to high quality planting materials and improved the effectiveness of nursery management. The reform has enabled the engagement of various forms of nurseries and created a hybrid system of state nursery operations. However, the state monopoly over the major seedling supply system using its inherent technical, market, policy and institutional advantages has limited the development of small-scale nurseries. The policy implication of this research is that improvements to the governance structure in the supply system of tree seedling may require more investment in nursery techniques, market information and provision of incentives to enhance small-scale nurseries and to contribute to seedling production. 相似文献
14.
15.
16.
西藏林业在西藏的经济建设中起着举足轻重的作用，森工工业是西藏的支柱产业之一，随着经济的发展，对森林资源的要求越来越广泛。怎样适应市场经济发展需求，合理开发森林资源，永续利用，是当前西藏林业发展的主要问题。作者根据西藏森林资源情况，进行了宏观分析，并提出了相应的对策措施。 相似文献
17.
几种苗木生长规律的研究 总被引：8，自引：0，他引：8
以高等数学的有关理论,通过Ｌｏｇｉｓｔｉｃ方程对加拿大杨,紫穗槐,刺槐,沙棘等４种苗木的生长规律进行了模拟研究,并对速生期进行重点分析。提出了苗木大量供应水肥的起始时间,为苗木科学管理提供了理论和方法。 相似文献
18.
Folaranmi D. Babalola 《Small-Scale Forestry》2008,7(3-4):263-273
Small-scale private nurseries in Ibadan, Oyo state, Nigeria, are examined with the purpose of identifying policy options that could further enhance development of the enterprises. A random sample of nurserymen operating in the city was interviewed about their reasons for engaging in the nursery business, types of services rendered by the nurserymen to seedling buyers, duration of nursery establishment, mode of land acquisition, species of seedling produced, factors affecting price of the seedling species, and source and cost of labour. Most of the private nurseries were owned by private individuals engaging in the business for reasons including income generation, as a hobby, and for research. Landscaping was the most common service rendered by the nurserymen; other services included maintenance of private gardens, and supply of seedling to individuals and landscaping contractors. Most of the land used for establishing the nurseries was obtained through lease from the government, with some through purchase and family land. Most of the labour was provided by the nurseries operators, employment of family members and some hired labourers. Seedlings of ornamental plants were in highest demand followed by seedlings of horticultural crops, and forest trees. Requirements for the nursery industry to develop further were identified, including land availability and at affordable price, and affordable interest rates charged by financial institutions on businesses loans. Training programs including workshops and seminars are necessary to keep nursery operators abreast with current techniques of seedling propagation as well as record keeping and business principles. Further, the nurserymen need to embark on strategies that add value to their products. 相似文献
19.
20.
A decentralized seedling production is regarded as the most effective means of providing smallholders with planting materials. However, the sustainability of smallholder nursery operation is constrained by several factors, including the limited availability of germplasm, lack of technical skills and low seedling demand low viability of seedling market. The government nursery sector could complement the weaknesses of the smallholder nursery group but government nurseries are not operating effectively to enhance the availability of high quality seedlings of a wide species base for smallholder forestry. Seedling production in government nurseries is quantity-orientated with low emphasis on the production of high quality planting materials. Germplasm used in seedling production is mostly collected from unselected sources and seedlings produced are mostly of low physical quality. The species selection in government nurseries is heavily based on the availability of germplasm which resulted in the production of a few species which are commonly raised on private nurseries. The duplication of species of most seedlings raised in government nurseries with those produced in private nurseries and the far distance of government nurseries from the villages has resulted in low uptake of seedlings by smallholder tree farmers. For the government nursery sector to become more effective in providing support in the present paradigm of decentralized seeding production, a change from its production system and a broadening of the role it plays is needed. The social mobilization on seedling production as a scheme of implementing the Green Philippines Program has led the Department of Environment and Natural Resources to acknowledge the seedling production activity of private individual and communal nursery groups. This can be an opportunity for organizing the private and government nursery sectors to promote the operational effectiveness of the overall forest nursery industry. 相似文献