红花檵木种质资源研究与利用

红花檵木为湖南特有野生资源,回顾了红花檵木种质资源研究利用的历史,简述了红花檵木的种质资源、生态习性、形态特点、细胞学及生物学特征、栽培管理与利用等方面的研究,对其研究与利用前景进行了展望,提出加快红花檵木研究的迫切性.     

祁连山林业洪水灾害及防治对策

祁连山林区降水时空分布不均,每2～3年在雨季会出现大雨或暴雨天气,引起山洪暴发,对生态环境和林业生产也造成一定破坏。总结实践经验,提出暴雨洪灾的防御策略措施。     

努力发挥林业学术团体在生态文明建设中的特殊作用

在生态文明建设中,林业学术团体应在传播生态和保护理念、配置社会和人才资源、提供科技引导和支撑三个方面发挥积极作用,为加快生态文明建设做出积极贡献。     

建立玉米现代产业技术体系,加快玉米生产发展

玉米生产涉及多学科、多部门和多产业,形成独特的产业链条。玉米现代技术产业体系的建立必将大大加快我国玉米生产的发展。本文论述了玉米现代产业技术体系的内涵、玉米种质创新、育种取得的成就、存在的问题及其解决途径,玉米高产优质栽培理论与技术的发展现状与存在的问题,玉米产后加工的现状和前景。     

基于循环经济的黑龙江省林业产业竞争力提升研究

在经济全球化不断发展的新世纪,作为生态经济建设的重要组成部分,林业产业不仅肩负着保护森林资源与发展林业经济的双重历史使命,而且在实现新一轮的绿色产业革命的过程中处于重要地位.为此,将循环经济思想引入黑龙江省林业产业竞争力研究中,基于循环经济理论,构建了生态循环型产业体系,并提出基于循环经济理论的提升黑龙江省林业产业竞争力的策略,为提升黑龙江省林业产业竞争力给予一定方向引导.     

云南省双江县膏桐良繁基地近自然林业建设模式的初步研究

按照植被覆盖差异将云南省双江县膏桐良种繁育基地划分为落叶季雨林、季风常绿阔叶林及萌生灌丛、暖温性针叶林、热性稀树灌木草丛、人工林和农田6类立地类型。在此基础上,探索了基地建设的近自然造林模式,提出在膏桐种植中应当遵循促进生态恢复、保护生物多样性、保持群落结构完整性、充分利用现有物种、采用乡土物种和多物种混交等原则。     

虚拟仪器技术在现代农业生产中的应用

随着科学技术的发展,由于虚拟仪器具有传统仪器不可比拟的优点而在农业生产中得到广泛的应用。介绍了虚拟仪器的概念、特点、结构、软件开发平台以及在农业生产中的应用实例,对于提高农业生产效率具有一定的指导意义。     

Integrating landscape connectivity in broad-scale forest planning through a new graph-based habitat availability methodology: application to capercaillie (Tetrao urogallus) in Catalonia (NE Spain)

The loss of connectivity of forest landscapes is seriously hindering dispersal of many forest-dwelling species, which may be critical for their viability and conservation. In this context, explicitly incorporating connectivity considerations is an important challenge in current forest planning and management, but as yet there is a lack of operative methods for appropriate decision making in this respect. We describe a new methodology based on graph structures and a habitat availability index (integral index of connectivity) that integrates forest attributes (like habitat quality) and network connectivity in a single measure. We apply this methodology to examine the connectivity of the highly fragmented habitat of capercaillie (Tetrao urogallus) in Catalonia (NE Spain), where the threatened status of this forest bird species calls for landscape-level forest planning solutions. We analyse data on the distribution of capercaillie forest habitat at 1 km spatial resolution obtained from the recent Catalan Breeding Bird Atlas. We determine the functionally connected regions existing within its habitat distribution and identify the forest habitat areas that are more important for the maintenance of overall landscape connectivity for this species. Based on these results, we provide recommendations on certain critical public forests where management oriented to the conservation of capercaillie habitat is more necessary. These results highlight the potential and practical interest of the proposed methodology for successfully integrating landscape connectivity in broad scale forest planning.     

Investigations concerning the role of Chalara fraxinea in declining Fraxinus excelsior

A study was carried out to clarify the role of the fungus Chalara fraxinea in decline of Fraxinus excelsior , which is observed on a large scale in central and northern Europe with high incidence of tree mortality. The aims of this work were: (i) to check for the presence of C. fraxinea in various tissues of declining F. excelsior by agar culture isolations and by direct analysis of plant tissues using molecular techniques (DNA extraction, ITS-PCR, cloning, ITS sequencing and T-RFLP); (ii) to study fungal communities inhabiting tissues with symptoms; and (iii) to test the pathogenicity of C. fraxinea to F. excelsior . Chalara fraxinea was isolated from 93% of stem cankers, 91% of necrotic leaf stalks, 27–28% of bark wounds and 30% of visually healthy leaf stalks. Molecular analyses of necrotic leaves, leaf stalks and bark revealed the presence of 25 different fungal taxa, 14 of which were detected in all three types of tissue sample. Chalara fraxinea was the second most common species (61% of samples), and only Cryptococcus foliicola occurred more often (70%). All eight of the tested C. fraxinea isolates induced necroses in bark and cambium on each of 86 inoculated trees, and all controls remained healthy. Average length of necroses caused by different C. fraxinea strains varied from 4·2 to 8·9 cm, but the differences were statistically insignificant. Instead, differences in resistance of individual trees to C. fraxinea were observed.     

开发利用互联网农林类开放存取文献资源

从开放存取解读和农林类开放存取文献资源两方面,对开发利用互联网上的农林类开放存取图书资源、期刊资源、报纸资源、论文资源、会议文献资源、标准文献资源、专利文献资源、文档文献资源、视频文献资源和数据库文献资源10种文献资源进行了探讨.