丽水生态示范区野生果树资源及开发利用

通过野外调查,初步查明丽水生态示范区野生果树共计28科56属178种,其中包括直接作果品食用、加工成果品制成品食用和作栽培果树育种材料3大类型。文中按果树栽培学的分类方法,将它们划分为仁果类(17种)、核果类(34种)、坚果类(23种)、浆果类(76种)、聚复果类(10种)和柿果及其他(13种)等6类。详细介绍了这些野生果树的种类、性状及其利用方式,并对野生果树资源的利用与保护提出了建议。     

东北地区天然林分区简述

从5个方面论述了东北地区的天然林分区与特点。     

生态旅游区游客旅游偏好对生态环境的影响——以漓江古东旅游区为例

通过对漓江古东生态旅游区的实地调研结合问卷调查,探讨游客旅游偏好及对环境的影响。结果表明,旅游区内游客以国内中青年为主,游客偏好旅游区清新湿润的空气和清澈的溪流与瀑布,偏好观光旅游和休闲度假旅游。游客旅游偏好对生态环境的影响主要表现在对植物生长环境、空气环境、水环境、景观环境等方面,其中对空气环境和景观环境影响较小,对植物生长环境和水环境影响相对较大。     

Rain forest recovery from dieback,Queensland, Australia

We present a detailed account of a dieback episode in tropical rain forest. The dieback episode took place from 1977 to 1989 within a 0.5 ha long-term demography plot monitored for stem growth and mortality from 1975 to 2005. In total 770 m² of rain forest was affected causing 13 trees >10 cm diameter at breast height (dbh) to die, and others to sicken. The dead trees came from four families, though 14 families were represented in the area. Trees of the family Elaeocarpaceae suffered significantly higher mortality. Larger trees were significantly more likely to die than small trees, but smaller trees were more likely to recover. Recruitment to >10 cm dbh size class after dieback was greater in areas that had been affected, and in 2005 stem density and basal area were higher than in 1977, before the dieback episode started. There were no significant trends in biodiversity change between affected and non-affected parts of the plot. Dieback may have dramatic effects at onset but over the medium term its impact appears to be less serious. Longer term monitoring will permit re-evaluation of this observation in the future.     

帽儿山地区叶面积指数遥感反演

以黑龙江省尚志市帽儿山林场(东北林业大学试验林场)为研究区,利用现代卫星遥感技术,结合实地调查采样数据和GPS测量技术,建立了从Landsat TM影像数据提取的植被指数(Vegetation Index,VI)与地面实测的叶面积指数(Leaf Area Index,LAI)的统计回归模型。然后再从众多统计模型中按照各自的相关系数(R)和确定系数(R2),选出反演LAI的最佳模型。     

基于生态优先的武夷新区滨水景观规划

根据武夷新区的区位及城市布局结构,从生态学的角度探讨了滨水景观规划设计的原则,并对武夷新区滨水景观进行了初步规划。     

Nonlinear Science and Control about the Geological Hazards in the Three Gorges Reservoir Area

Such the geological hazards as landslide, rockfall, debris-flow and so on frequently occur in the Three Gorges Reservoir Area, so it is a very practical and immediate job to explore the mechanism caused the geological hazards and how to forecast and control the geological hazards. For this reason, this paper introduces the situation of the geological hazards occurred in the Three Gorges Reservoir Area and the major type and feature of the geological hazards occurred in Chongqing, and discusses the basic principle about the modern nonlinear science applied to the geological hazards and the creep-slip, stick-slip occurred on the joints of rock mass and the monitoring technology of the geological hazards.The basic thinking is put forward which can be applied the modern nonlinear science to the geological hazards occurred in the Three Gorges Reservoir Area.     

影响淮北地区小麦生产的降水因子分析

利用濉溪县1958—2004年小麦产量资料和相应的降水资料,进行同步统计分析,结果表明：小麦气象产量与播种~分蘖和返青~拔节期的降水量显著正相关,与抽穗~成熟期的降水量显著负相关。适宜的降水量为：底墒水60~120mm,生育期内降水220~290mm。濉溪县小麦生产过程中降水总量适中,部分时段略显不足,旱多于涝,要优化品种结构,抢墒早播,浇好播种底墒水、分蘖越冬水和拔节孕穗水,集雨保墒。     

三峡库区农业资源持续高效利用模式研究

针对三峡库区资源环境和农业生产现状及存在问题,探讨了农业资源持续高效利用的主要生产模式,即:种—养—加—销一体化模式、农林牧复合模式、农林复合模式、种—养立体农业模式和庭院高效生态农业模式等,并结合典型案例进行分析。此外,提出了实现农业资源持续高效利用的建议和对策。     

Research on Development of Lateral Aviation in the Three Gorges Reservoir Area of the Yangtze River

There is a promising future for lateral aviation in the Three Gorges Reservoir Area of the Yangtze River because of the abundant natural and cultural tourism resources.The advantage of the lateral aviation is its low investment,convenience,speed,and wide service area.It is an important factor for the future development of tourism in cities in this area.This paper analyzes the realities and problems facing lateral aviation in this area and suggests some countermeasures and planning suggestions for lateral aviation development.