直干桉袋苗培育技术

直干桉是桃金娘科桉属的一种，原产澳大利亚，后被我国引种成功并推广，直干桉是高大常绿乔木，树高可达40米，胸径1米，干形通直圆满，木材纹理直，结构细腻，抗韧度强，耐腐，可供建筑、矿山桥梁、家具等用材；枝叶含油量0．92％，可提炼芳香油供医药用，花为蜜源植物。其生性喜光，耐湿热，生长迅速，[第一段]     

发展百万亩阔叶林 建设台州秀美山川

常绿阔叶林是区域内顶级植物群落，生态功能相对稳定和完善。大力发展阔叶林是新时期林业建设的一项重要内容和抓手，对于改善生态、促进“绿色浙江”建设和加快全面建设小康社会具有十分重要的意义。台州市规划从2003年2010年，新发展阔叶林105万亩，使阔叶林总面积上升到     

临汾安泽连翘成为地理标志保护产品

正近日,经国家质检总局批准,山西安泽连翘成为地理标志保护产品。产地范围为山西省安泽县府城镇、唐城镇、和川镇等7个乡镇现辖行政区域。安泽连翘古称岳阳连翘,以个大、饱满、药用价值高闻名全国。该县连翘总面积达10余万公顷,年产量达400万公斤,采收量可达280     

浅谈乔木在永丰县城市园林绿化中的应用

现代的人们意识到生态环境的重要性,并将审美意识添加到城市的环境当中,实现城市居民高质量的生活状态。低碳生活成为了人们倡导的生活主题。江西省在城市园林绿化中,鄱阳湖生态城市群的设想备受瞩目,永丰县作为规划中的中等城市,在城市园林设计中种植观赏乔木对于园林的生态多样性具有重要的意义。本文针对乔木在城市园林绿化中的应用展开探讨。     

低效灌木林的改造

1.形成原因及表现。低效灌木林形成的主要原因,大部分是长期放牧、反复烧垦、乱砍滥伐、大量岩石裸露等综合因子引起的。低效灌木林大部分立地条件为中等立地质。此类林表现为:乔木树种稀少,土壤板结,人为活动频繁或岩石裸露较多;优势树种不明显,建群种或伴生种较多;经济效益差,     

桃叶卫矛的育苗技术

桃叶卫矛（Euonymus bungeanus Maxim），又名明开夜合，为卫矛科卫矛属落叶大灌木或小乔木。其枝叶娟秀细致，姿态幽丽，秋季叶色变红，蒴果挂满枝梢，开裂后露出桔红色假种皮，经冬不落，甚为美观。行道树、庭院中皆可配植，亦可作景观点缀树种应用。     

散生竹良种的选育

散生竹是指单轴散生型竹子,具有地下茎(竹鞭),竹竿在地面呈散生状。根据竹子地下茎的分生繁殖特点和形态特征,云南现有的散生竹类可划分为单轴型散生竹、复轴型混生竹、合轴型散生竹3种类型。其中,分布较多的有刚竹属、大节竹属、铁竹属、筇竹属、苦竹属、方竹属、箭竹属、玉山竹属、泡竹属等100多种,以中小型竹类居多。     

常绿阔叶林恢复过程植物物种多样性的变化

Evergreen broad-leaved forest is one of the most important vegetation types in China. Because of the human activities, evergreen broad-leaved forest has been destroyed extensively, leading to degraded ecosystem. It is urgent to conserve and restore these natural forests in China.tn this paper, the tendency and rate of species diversity restoration of the evergreen broad-lea ved forest in Darning Mountain has been studied. The main results are as follows:(a) in subtropical mid-mountain area, species diversity in degraded evergreen broad-leaved forest can be restored. Through analyzing b diversity index of communities in different time and space, it was found that the species composition of communities tend to be the same as that in the zonal evergreen broad-leaved forest. (b) The restoration rate of evergreen broad-leaved forest was very fast. Planting Chinese fir after clear-cutting and controlled burning of the forest 178 species appeared in a 60Om^2, sample area after 20 years““ natural recovering. Among these species, 58 were tree layer and the height of community reached 18m, The survey suggested that it would take only 20 years for the degraded forest to develop into community composed of light demanding broad-leaved pioneer trees and rain-tolerance broad-leaved trees, and it need another 40-80 years to reach the stage consisting of min-tulerance evergreen broad-leaved trees, (c) Species number increased quickly at the early stage (2-20 years) during vegetation recovering process toward the climax, and decreased at the min-stage (50-60 years ), then maintained a relatively stable level at the late-stage (over 150 years).     

深圳大鹏半岛经济发展的生态代价分析及相关对策设计

本文描述了深圳大鹏半岛近几年来在环境与资源耗损方面出现的一些不容忽视的消极现象，同时提出了把航拍图片与影带作为今后征地补偿的依据之一，在七娘山区砍伐迹地上适当种植少数几个处于生态系统自然演替进程中早期或中期阶段的乡土灌木和乔木树种，高新技术项目的投资密度不应小于3000元／平方米、容积率不应低于1．0，大鹏半岛不宜再新建或扩建电池生产项目，区镇政府应督促现有电池生产企业在厂区种植重金属超富集植物等主张。     

自然绿地也是绿化

一说到城镇绿化,有人就会想到高大的乔木、整齐的绿篱、多彩的花坛、如茵的草坪.无疑,这些人工绿地是目前城镇绿化的主体.另外,在圈占而未开发的空旷闲地,在人们无暇顾及的偏僻角落,只要有泥土、阳光、雨露,就可能会有野草杂木滋生、成长、蔓延、蓬勃,成为野草丛生、杂木葳蕤、物种丰富、生机盎然的绿色世界.这些自然绿地也是绿化,而且是更科学、更完善的绿化.