基于ATV平台的全地形立体草原防火系统

提出以ATV(全地形车)为移动平台,搭载各种灭火、通讯装备,组成一种反应迅速的草原消防灭火系统,并将复杂地形移动技术、灭火技术和遥控通讯技术有机地融合在一起.对系统方案做了详细介绍,该系统有助于实现草原防火“早发现、早扑灭”的目标,可大大减少火灾损失.     

Stockings for protection of containerized conifer seedlings against pine weevil (Hylobius abietis L.) damage

The effectiveness of a stocking, constructed of nylon and cotton netting, in protecting containerized conifer seedlings against pine weevil attack was evaluated in field tests on 37 clear‐cut reforestation areas in southern and central Sweden. The stockings significantly reduced pine weevil feeding on treated seedlings as well as seedling mortality. The protective effect of the stockings was similar to that of an insecticide (permethrin) treatment. In most experiments the survival of stocking‐enclosed seedlings was satisfactory from a practical point of view, whereas untreated control seedlings suffered heavy mortality.     

Implications of crude oil pollution on natural regeneration of plant species in an oil-producing community in the Niger Delta Region of Nigeria

The study evaluated the impact of crude oil pollution on natural regeneration of plant species in a major oil-producing community in the Niger Delta region of Nigeria. Three sites—unpolluted site(US), polluted and untreated site(PUS), and polluted and treated site(PTS)—were purposively chosen for the study. The seedling emergence method was used to evaluate soil seed banks in the various sites at two depths, 0 to 10 cm and 10 to 20 cm. Woody-plant species richness, abundance, and diversity were higher in the US seed bank than in the PUS and PTS seed banks. The highest number of non-woody plants was observed in the US, followed by the PTS, and then the PUS. Both species richness and diversity of non-woody plants were highest at the US, followed by the PUS, and lowest in the PTS. Woody species in the US seed bank were 87.5% and 80% dissimilar with those of the PUS and PTS at 0–10 cm and 10–20 cm respectively. No variation was observed between woody species in the PUS and PTS seed banks. Non-woody species at 0-10 cm US seed bank were 73.08% dissimilar with those of PUS at the two soil depths and 81.48/88.46% dissimilar with those of the 0–10/10–20 cm of the PTS respectively. At 10–20 cm, non-woody species of the US were 69.66% dissimilar with those from each of the two soil depths in PUS; and 73.91/81.82% dissimilar with those of 0–10/10–20 cm of the PTS respectively. Non-woody species variation between the PUS and PTS was higher at 10–20 cm than 0–10 cm. The poor seed bank attributes at the polluted sites demonstrates that crude oil pollution negatively affected the natural regeneration potential of the native flora because soil seed banks serve as the building blocks for plant succession. Thorough remediation and enrichment planting are recommended to support the recovery process of vegetation in the polluted areas.     

河滩地杨树防护林生长量与气候因子关系研究

杨树是我国低山丘陵半干旱区河滩地重要的防护用材林树种之一,探讨其生长量与气候因子的定量关系,可为该地区河滩地杨树防护用材林集约栽培及其低产林的更新改造提供科学依据。本文以该地区大、小凌河两岸河滩地为典型试验区,经多年连续观测,通过林木调查和树干解析,应用多元逐步回归和灰色系统理论与方法,建立了杨树生态防护用材林高生长量与气候环境因子的回归模型,气候环境因子对其生长量影响程度的灰色关联顺序为光>水>气>热,即可认为影响杨树高生长的主导因子是光照因子,其次是水分因子,再次是热量因子。表2参17。     

广州城市绿地植物群落生态效应分析

对广州城市绿地中不同植物群落的生态效应进行对比分析和研究,探讨了不同的绿地群落在物种丰富度、三维绿量、空气质量改善、降温增湿等方面的差异及原因,指出叶面积指数在绿地生态结构与生态功能方面起着关键指标的作用,以期为城市绿地的生态建设提供相关依据。     

基于低碳理念的安康中心城区居住区绿地设计

基于对低碳理念的理解,通过资料查阅、实地调查掌握安康市中心城区居住区绿地现状,分析居住区绿地设计中在绿地类型、植物选择配置等方面存在的有悖于低碳理念的规划设计,提出丰富绿地类型,提高绿地率水平,增加屋顶和垂直绿化,合理配置耐旱植物,增加植物多样性,回收利用绿地废弃物等基于低碳理念的居住区绿地设计建议。     

浅谈如何提高造林质量

如何提高造林质量,严把总体规划关;严把整地质量关;严把苗木质量关;严把栽植质量关;严把管护质量关;严把抚育质量关。     

三花冬青嫩枝扦插繁殖技术

运用单因素试验研究植物生长调节剂、扦插基质和带踵扦插等因素对三花冬青扦插生根的影响,结果表明3个因素对三花冬青扦插生根影响差异显著,采用当年生半木质化插条,黄心土为基质,IAA 250 mg·L-1或IBA 500 mg·L-1蘸根处理15 s,带踵扦插等技术措施,可以显著提高三花冬青嫩枝扦插的生根率,在生产中具有较高的应用价值。     

矮牵牛茎段植株再生体系的建立

将矮牵牛Petunia hybrida Vilm的茎段接种在MS附加不同激素的培养基上进行愈伤组织诱导.结果表明:在MS BA1.0 mol.L-1 NAA1.0 mol.L-1的培养基上可以形成愈伤组织,而且经过继代培养仍可形成愈伤组织;茎段或愈伤组织接种在MS BA1.0 mol.L-1 NAA0.1 mol.L-1的培养基上可以形成不定芽,且诱导率达100%;健壮的高1.5~2.0 cm的不定芽接种在1/2MS IBA0.5 mol.L-1 AC1.0 g.L-1的培养基上,其生长根状况良好,生根率达100%.     

天水城区园林绿化现状与发展对策研究

天水是我国历史文化名城和优秀旅游城市，地处西北，干旱少雨，生态环境脆弱，城市园林绿化具有一定的特殊性。通过调查天水城区园林绿化现状和园林植物种类、分布、数量，分析其特点，提出了天水今后园林绿化与绿地系统建设的建议，以创造更加优美、自然、和谐的城市人居环境。