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采用人工模拟低温处理,通过对樱花、樱桃、黄栌、胶东卫矛1年生休眠期枝条的游离脯氨酸、丙二醛(MDA)及可溶性糖含量的测定和冷冻后恢复萌芽试验,对它们的抗寒性进行分析与比较。结果表明,随着低温胁迫的加剧,4种灌木绿化树种的游离脯氨酸、丙二醛、可溶性糖含量大体呈上升趋势,萌芽数呈下降趋势,且3种生理指标测定结果与冷冻恢复萌芽试验的结果基本一致。4种灌木绿化树种的抗寒性强弱依次为黄栌 > 胶东卫矛 > 樱桃 > 樱花。
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在全球化的冲击下,各种文化的出现和兴起给景观设计带来了新的发展方向。文中在解释了地域主义的概念与特点之后,提出了中国现在景观地域主义设计中面临的一些问题,给出了一些优化策略,并提出了地域主义文化发展的意义,最后以最新刚刚在武汉建成的"楚河汉街"一期项目为例分析后现代主义影响下的地域主义景观建设。
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二月兰的多用途开发与城市绿化应用 总被引:3,自引:0,他引:3
在全面介绍二月兰作为观赏植物、油料资源、食用蔬菜和饲料植物栽培的价值基础上,重点分析了二月兰作为城市绿化地被植物的优势,列举了二月兰的绿化配置形式,并介绍了我国主要城市应用二月兰进行绿化的成功实例,探讨了在城市绿化中广泛推广应用二月兰的前景。
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文章对云龙湖风景区的文化景观资源进行了全面分析,提出了实施积极的保护和利用战略,以及提升风景区文化内涵的对策与建议,尤其是通过对苏轼文化在云龙湖风景区内的遗存和利用情况调查,提出了延续历史文脉、凸显苏轼文化的设想,为城市文化的传承与弘扬开辟了新径。
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论城市森林规划的实证性与规范性 总被引:2,自引:1,他引:1
从城市森林规划实证性与规范性的概念入手,回顾总结了景观规划设计中的实证性与规范性传统,揭示了二者并重的发展趋势,讨论了基于实证性与规范性的城市森林规划方法;在对城市森林理性过程规划程序及改进方法论述的基础上,提出了兼顾实证性与规范性的城市森林规划双循环结构过程。
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文中讨论了绿色屋顶的雨水管理基本构成,分析了影响屋面雨水管理效能的各种因素,并从效能优化的角度提出了相应的设计策略。
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文章介绍了海峰自然保护区的基本概况、景观资源特点,并对其景观资源作了综合评价,提出了开发建设海峰自然保护区景观资源的建议。
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通过分析河北政法职业学院新校区的环境特点与办学特色,探讨了校园绿化规划设计原则,确立了与校园各功能区功能相契合的生态园林景观与人文景观设计方案,对法学类高等学校生态文明建设进行了初步尝试。
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HAN Jing HE Wei SONG Li-zhou TIAN Cheng-ming WANG Jin-liKey Laboratory for Silviculture Conservation of Ministry of Education Beijing Forestry University Beijing P.R.China Fragrant Hills Park Beijing P.R.China Forest Protection Station of Beijing Forestry Bureau Beijing P.R.China 《中国林学(英文版)》2009,(1)
We analyzed the inhibition rates of eight kinds of fungicides to the pathogen of verticillium wilt of smoke tree(Cotinus coggygria) by measuring mycelium growth.Results show that four fungicides(Weijunjing,thiophanate-methyl 70% WP(wettable powder),carbendazim 50% WP and Junxianwei) have the best antifungal effects.Three fungicides,Weijunjing,carbendazim 50% WP and Junxianwei,were selected to determine the control of verticillium wilt in potted smoke tree seedlings.We found that the relative efficacy of Wei... 相似文献
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We analyzed the inhibition rates of eight kinds of fungicides to the pathogen of verticillium wilt of smoke tree (Cotinus coggygria) by measuring mycelium growth. Results show that four fungicides (Weijunjing, thiophanate-methyl 70% WP (wettable powder),
carbendazim 50% WP and Junxianwei) have the best antifungal effects. Three fungicides, Weijunjing, carbendazim 50% WP and
Junxianwei, were selected to determine the control of verticillium wilt in potted smoke tree seedlings. We found that the
relative efficacy of Weijunjing was up to 74%. Based on the results, Weijunjing and carbendazim 50% WP were prepared for field
trials. The results indicate that the relative efficacy of Weijunjing (300 times diluted) and carbendazim 50% WP (400 times
diluted) were 66.2% and 48.9% in plot 1 and 26.4% and 31.8% in plot 2 after soil disinfection, and were 224% and 61.8% in
plot 3 without soil disinfection in 2007. The relative efficacy of Weijunjing and carbendazim 50% WP were 49.6% and 45.4%
in plot 2 in 2008. 相似文献
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松材线虫病生物防治研究进展 总被引:2,自引:0,他引:2
松材线虫Bursaphelenchus xylophilus是外来入侵生物,主要依靠媒介昆虫的携带在自然界中扩散传播。目前松材线虫病的生物防治研究主要集中在对松材线虫本身及其传播媒介——松墨天牛的控制两方面。本文对国内外松材线虫病的生物防治方法研究做了总结。 相似文献
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气候要素对松材线虫病疫情的影响研究 总被引:2,自引:0,他引:2
引入典范对应分析方法,研究了气候要素对松材线虫病疫情的影响。结果表明,不同的气象因子对松材线虫病的影响大小不同,并且在不同的松材线虫病侵染阶段也有差异。年平均风速以及与其相关的年蒸发量和相对湿度是影响定海区松材线虫病发病面积的最主要因素;年平均气温是影响定海区松材线虫病发病密度最主要的因素;冬春季降水过多会导致松材线虫病疫情严重,而6月份降水量越大,松材线虫病疫情越轻;相对湿度也是松材线虫病疫情的一个较重要影响因素,主要表现在3-5月份,与疫情轻重程度呈正相关。 相似文献
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松材线虫病入侵陕西的风险分析 总被引:1,自引:0,他引:1
松材线虫病自1982年在我国发现后,扩散和危害呈逐年扩大和加重趋势,严重影响了我国生态安全和经济发展。本文通过对松材线虫病定量的风险分析,得出风险值R=2.775,表明松材线虫病对陕西省而言属于特别危险的林业有害生物,应加强监测、检疫和除治管理,防止传入陕西省并造成扩散危害。 相似文献
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LIU Huimin NING Shaohua LIANG Jun LU Quan Research Institute of Forest Ecology Environment Protection Chinese Academy of Forestry Beijing P. R. China 《中国林业科技(英文版)》2006,5(3):60-66
Pine wilt disease is fatal to pine trees, which has become the most dangerous biological disaster in forest historically (Chai Ximin et al. 2003; Yang Baojun et al. 2003; Zhang Xingyao et al. 2003). The outbreak and epidemic of pine wilt disease relate closely to host trees, insect vector and symbiotic microorganisms, and its pathogenic mechanism is not clear so far (Tominaga et al. 1984; Ishikawa et al. 1986; Shuto et al. 1987; Stamps et al. 1998a; Cheng yuexin et al. 2005; Tan Jiajin et … 相似文献
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Naoko Miki Keiji Sakamoto Takashi Nishimoto Ken Yoshikawa Yoshio Hada 《Journal of Forest Research》2001,6(3):181-186
We examined the relationship between the incidence of pine wilt disease and moisture conditions in the stand level ofPinus densiflora Sieb. et Zucc. forests in the warm-temperate zone of the western part of Japan. For this analysis, pine trees killed by pine
wilt disease were distinguished from the suppressed trees by their position in the layer of the pine forest stand. The drainage
area, which is small in the upper part and large in the lower part of the slope, was adopted for representing the moisture
conditions in the soil of the slope. The percentage of the pine trees killed by pine wilt disease increased as the size of
the drainage area increased. This result suggested that the incidence of pine wilt disease tended to be high in areas with
moist conditions. Pine trees attacked by the pinewood nematode die from extensive water deficit due to tracheid cavitations.
Pine wilt disease mainly emerges in the summer when the soil water conditions become especially severe, and the radical water
stress is thought to accelerate the disease. It was assumed that pine trees in the plots with the small drainage area resisted
the influence of the attack of the pinewood nematode because pine trees in the plots with the small drainage area encountered
long-term water stress and acquired drought tolerance. Pine trees in the plots with the large drainage area were presumed
to be well established in the moist conditions and not to have acquired drought tolerance. The drought tolerance of pine trees
was thought to be an important factor in resistance to pine wilt disease. 相似文献
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