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本文分析了陕西"数字林业"建设现状及存在的问题,提出了陕西"数字林业"建设的思路及建议。一、陕西数字林业建设现状及问题(一)数字林业建设现状1、计算机网络建设现状。目前省 相似文献
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数字林业的发展与信息化技术的应用 总被引：4，自引：0，他引：4
数字林业是数字中国的一个组成部分,是应用现代科学技术提高林业经营集约度、实现林业信息化、进入信息高速公路建设的重要前提,是加速林业建设的重要手段.通过对数字林业的基本概述,介绍了数字林业的发展和现代信息化技术在数字林业中的应用. 相似文献
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从林业数字图书馆是信息多元化和数字林业发展的必然要求出发,介绍了数字林业产生的背景及发展情况,分析了数字林业对林业院校图书馆建设的影响,指出了我国林业院校建设林业数字图书馆的必要性及应采取的对策。 相似文献
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近年来,随着3S技术在林业生产建设中的运用越来越广泛深入,我国林业信息技术的发展与应用也实现了质的飞跃,“数字林业”建设取得了长远发展,林业信息化建设步伐加快。建设林业数字图书馆,应对“数字林业”时代,已成为当前林业院校图书馆数字化建设的重要研究课题。 相似文献
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5G、互联网、区块链等数字技术的兴起为中国乡村林业发展提供了新动能,但目前对数字经济如何影响乡村林业的发展缺少深入的理论剖析与逻辑概括。文中建立了数字经济赋能林业生产-经营-产业体系的理论机制,并对其进行解析;以中国移动5G护林员、元林数字林业电商平台、漳州林业数字银行为案例,分析数字技术如何通过其多维传导路径赋能林业的数字化发展及其成效;探讨目前数字经济赋能乡村林业发展面临的制约因素,进而提出推动数字经济与林业产业进行深度融合、结合乡村新基建建设为林业数字化发展提供良好配套环境,以及通过提升林农和新型经营主体数字素养为林业数字化建设积累人力资本等政策启示。 相似文献
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基于数字林业特征和发展现状,探讨我国数字林业建设过程中存在的问题,介绍并分析Web服务技术的概念与技术特征,提出Web服务技术在数字林业基础建设中的应用方式,为我国数字林业的进一步应用提供新思路. 相似文献
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对6个银杏品种7 a生幼树的树高、干径、1 a生枝长及离体叶片的相对含水量(RWC)和叶绿素稳定指数(CSI)进行研究,结果表明,不同品种的干径和1 a生枝长度的差异达到了极显著水平,干径以大佛手最粗,为2.0824 cm,马铃最细,仅为1.5378 cm;1 a生枝长度最长的是大圆铃达22.9773 cm,最短的是郯城9号,仅为12.0889 cm;马铃的耐旱性最强,CSI为20.67,RWC损失率为65.07%。 相似文献
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森林资源调查监测综合体系现状分析 总被引：1，自引：0，他引：1
对我国现有森林资源调查监测体系现状特点进行了分析,指出现有森林资源调查体系中存在着监测指标综合性不强、技术标准不统一,监测数据管理混乱,监测管理体制不顺,调查队伍素质不高,装备设备落后等问题。提出抓好林业基础数表修编,理顺管理体制、整合监测职能,统一技术标准、加强成果共享,更新技术装备、提高监测水平,明确资金渠道、保证资金投入等对策。 相似文献
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刘宏明 《绿色中国(A版)》2005,(10):42-43
野生动物所有权是所有权的一种,它与其他所有权的区别在于客体的不同。文章阐述了野生动物的内涵,分析了野生动物的分类和野生动物与野生动物资源的区别。在明确野生动物含义的基础上,提出了野生动物所有权的概念,深入论述了野生动物所有权与野生动物资源所有权的差异和联系,并对野生动物所有权的主体、客体、内容进行了分析。 相似文献
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大兴安岭森林资源变化分析 总被引：11，自引：0，他引：11
阐述了人为破坏、过度采伐和自然森林火灾是引起大兴安岭森林资源变化的重要因子;通过对建国初到2002年大兴安岭森林资源在数量上和质量上的变化分析,得出了森林资源变化趋势。森林资源数量减少,且森林质量下降,大兴安岭的森林在经历着破碎化和年轻化的过程。 相似文献
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枣树叶片营养元素含量的季节变化动态的研究 总被引：6，自引：0，他引：6
本文研究了枣树叶片中N、P、K、Ca、Mg、Mn、Cu、Fe、Zn9种营养元素含量的季节变化动态规律。结果表明:全N的含量在初花期以前随着叶龄的增大而迅速降低。在初花期至幼果发育前期较稳定且较低,在幼果发育中期迅速增高,采收后逐渐下降;全P和全K的含量随着叶龄的增加而减小,至叶片成熟后则较稳定;Ca和Mn的含量随着叶龄的增加而迅速增高;Fe的含量在初花期出现低谷,从盛花期到果实发育中期处于稳定的高水平状态,果实进入白熟后逐渐下降,采果后则变动不显著;Mn、Cu和Zn3元素含量的变化趋势与N素水平密切相关;施尿素显著地提高了大多数物候期中叶片全N和Mn的含量,也显著地降低了大多数物侯期中叶片全P、全K和Zn的含量:在年生长周期内,各营养元素的叶分析诊断大多数有2个适宜的采叶时期。 相似文献
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Native woody species regeneration in exotic tree plantations at Munessa-Shashemene Forest,southern Ethiopia 总被引：2，自引：0，他引：2
Regeneration of native woody species was studied in the plantations and the adjacent natural forest at Munessa-Shashemene Forest Project Area, Ethiopia. The aim of the study was to test the hypothesis that tree plantations foster regeneration of native woody species. A total of 60 plots, having 10 × 10 m area each, were studied in monoculture plantations of 4 exotic species (Cupressus lusitanica, Eucalyptus globulus, E. saligna, Pinus patula) and an adjacent natural forest. Ages of the plantations ranged between 9 and 28 years. Soil seed bank analysis was also undertaken from soil samples collected in each of the 60 plots to examine the similarity between the soil seed flora and aboveground vegetation. A total of 56 naturally regenerated woody species were recorded beneath all plantation stands with densities ranging between 2300 and 18650 individuals / ha in different stands. There was a significant difference among plantation stands with regard to understorey density (standard deviation: 4836 ± 1341). Vegetation diversity was assessed through analyses of floristic composition, species richness and abundance. Generally, seedling populations were the most abundant components of the regeneration in most of the plantation stands, forming 68 % of the total regeneration count in all stands. A total of 77 plant species represented by 44 herbs, 13 woody species, 8 grasses and 12 unidentified species were recorded in the soil seed bank from all stands. Similarity between the soil seed bank and aboveground flora was very low implying that the role of soil seed banks is negligible rather dispersal plays an important role in the process of regeneration. These results support the concept that forest plantations can foster the regeneration of native woody species, thereby increasing biological diversity, provided that there are seed sources in the vicinity of the plantations. 相似文献
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大通县退耕还林还草工程实施两年来的问卷调查分析 总被引：3，自引：0，他引：3
通过对青海省大通县退耕还林还草工程实施两年来干部、群众对退耕还林还草政策的态度、前景等进行问卷调查 ,发现有 98 5 %的干部、82 2 %的农民赞成退耕还林还草政策 ;绝大多数的干部、近半数的农民认为退耕 8年后的目标还是能够实现的。问卷调查也表明 ,虽然绝大多数干部群众支持退耕还林还草工程 ,但对退耕 8年后的经济效益等也心存疑虑。退耕还林还草工程必须坚持“全面规划、突出重点、宜林则林、宜草则草、林草复合”的方针 ,努力做到四个“确保” ,才能真正实现“退得下、稳得住、不反弹、能致富”的退耕还林还草总体目标 相似文献
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Peter Poschen 《Agroforestry Systems》1986,4(2):129-143
Growing Acacia albida as a permanent tree crop, on farmlands with cereals, vegetables and coffee underneath or in between, is an indigenous agroforestry system in the Hararghe highlands of Eastern Ethiopia. However, there is practically no systematic record or data on the merits and benefits of this practice.The paper presents the results of an investigation into the effects of the presence of A. albida on farmlands on the yield of maize (Zea mays L.) and sorghum (Sorghum bicolor L. Moench). Twenty seven plot pairs each consisting of one plot underneath the A. albida foliage cover and the other in the open, away from the tree-on farmers' fields, in a 40 km radius around the Alemaya College of Agriculture, were sampled and the yield components analyzed. A statistically significant increase in crops yields by 56% on average was found for the crops under the tree canopies compared to those away from the trees. This increase was caused by the improvement in 1000 grain weight and number of grains of plants under the tree, indicating that the trees enhanced the fertility status of the soil and improved its physical conditions in terms of crop growth.Additional benefits from the A. albida trees include supply of fuelwood and fodder. Quantitative estimates of these outputs as well as their monetary values are presented in the paper. However, in order to realize these benefits to a discernible extent, higher stand densities of the tree than at present are required.Based on an enquiry about the farmers attitude towards A. albida, the prospects for an extension of this promising agroforestry technique are discussed against the background of the state and trends of development of agriculture in the area. It is surmised that despite some shortcomings like the relatively slow and highly variable growth of A. albida and a conflict with the spreading cultivation of Ch'at (Catha edulis Forsk.), the prospects of extension of this technique are good. It is recommended that its propagation should be incorporated into the programmes of the extension agencies of the various governmental agencies concerned with land use. 相似文献
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Charalampos Lykidis Katerina Kotrotsiou Antonios Tsichlakis 《Wood material science & engineering》2020,15(5):269-277
ABSTRACT Densification of resin impregnated wood under hot-pressing is a method that along with the potential for the reduction of set-recovery could additionally increase the density of wood and further improve other technical properties. In this study, the effect of the methylated melamine-formaldehyde modification on the shape memory effect of densified Populous nigra wood at various compression ratio levels was investigated. Furthermore, the effects on moisture content and compression ratio were also assessed. The most important conclusion drawn was that MF can act as a means for reducing set-recovery of compressed poplar wood since it is obvious that the use of MF significantly improved the stability of densified wood due to the formation of new bonds between cell wall components and MF. In the case of densification under stress of 10?kg/cm2, the stabilization was improved by the use of MF to about 50% compared to water-treated specimens. The effect of MF on the stabilization of densified wood was not very clear for stresses higher than 10?kg/cm2 since due to the outflow of MF solution during the first minutes of compression. 相似文献