基于响应面分析方法的氧化乐果降解条件优化     

邓安生  黎小军 《安徽农业科学》2010,38(11):6015-6016,6022

[目的]采用响应曲面法对影响氧化乐果降解的因素进行优化。[方法]选取5个因素pH值（A）、接种量（B）、装液量（C）、温度（D）和摇床转速（E）的最佳水平范围进行研究。通过对二次多项回归方程求解获得氧化乐果降解的最佳条件。[结果]氧化乐果降解的优化条件为：pH值7.10,接种量9.46%,装液量86.38ml,培养温度30.25℃和摇床转速165.32r/min。在此最优条件下,氧化乐果的降解率最大,响应预测值为71.78%,验证值为71.40%。[结论]该研究为降低氧化乐果对动物体的危害提供科学依据。  相似文献   

风景名胜区“景中村”景观整治探讨——以杭州市西湖风景名胜区内村庄为例     

韩宁  马军山  卫立群 《农业科技与信息》2011,(3)

随着近年来国家大力进行新农村建设,农村发展得到了前所未有的重视。而景中村作为处于风景名胜区中比较特殊的村落,它不仅具有一般农村的特点,更重要的是它还直接影响着风景名胜区的整体发展,因此显得十分重要。本文将以杭州西湖风景名胜区中的三个具有代表性的景中村为例,对景中村景观整治模式进行探讨。  相似文献   

地域文化的写照--董永公园解读     

陈必锋  欧阳红玉 《安徽农业科学》2010,38(26):14625-14626,14636

以武汉董永公园为例,探讨了以地域文化为主题的公园的规划布局特点,以及在景观设计中如何体现出的地方文化内涵的设计手法,通过对董永公园的绿色人文、历史文化及孝文化的解读,挖掘孝感地域文化特色。  相似文献   

Observations on the occurrence and phenology of the invasive elm defoliator Aproceros leucopoda (Hymenoptera: Argidae) in the Czech Republic     

《Urban Forestry & Urban Greening》2017

Aproceros leucopoda has been found at nine locations in urban areas and in forests in the Czech Republic. Aproceros leucopoda was first reported at a location 700 m a.s.l. in the northern part of the country in 2011. The other locations range in elevation from 150 to 460 m a.s.l. In the current study, A. leucopoda was studied in four plots, where larvae and their zigzag feeding tracks were observed on 10 Ulmus trees located south of Lanžhot (southeastern Czech Republic) in 2014 and 2015. In 2014, feeding tracks and larvae were detected in late May, from 22 June to 13 July, and from 9 August to 6 September, suggesting the occurrence of three generations per year in the southeastern Czech Republic. The southern Czech Republic has been colonized much earlier than other parts of the country because of its proximity to localities with A. leucopoda in Slovakia and Austria. The presence of larvae or evidence of larval feeding was detected on only 2.84% of monitored leaves. We suggest that A. leucopoda endangers solitary elms in urban greening areas more than elms in forests.  相似文献   

南京市古林公园植物配置研究     

孟小艺 《中国园艺文摘》2013,(8):120-121

以南京市古林公园植物配置形式为例,在实地调研和调研后总结的基础上,对古林公园植物配置上运用的艺术手法和实际配置样式进行分析。  相似文献   

中原经济区建设中农村人口有序转移的政府责任研究     

古桂琴 《安徽农业科学》2012,(12)

以当前国家主体功能区划分背景下中原经济区建设为背景,在对中原经济区建设中农村人口有序转移进行研究的基础上,提出了各级政府部门推动农村人口有序转移的对策建议。  相似文献   

“场所精神”在洱源西湖国家湿地公园南片区设计理念中的应用     

钟俊 《林业调查规划》2013,38(1):106-110

场所精神是规划设计的灵魂。在洱源西湖国家湿地公园规划项目中，从分析“烟渚渔村”场地肌理入手，提出“幸福就在拐弯处”这一体现人本主义价值观的设计理念，并依据“渚岛”式大园林景观规划结构，构建了“一轴（生态旅游带）、七区（7个功能片区）的空间结构形态，建立了“岛与岛一水与岛一水与水一水与建筑”之间的相互交错的拓朴关系形态，探讨了各“渚岛”不同的情景规划设计的可能性。  相似文献   

福州左海公园风情园设计分析     

李房英  吴少华  周小青 《福建农业大学学报(哲学社会科学版)》2009,(3):106-108

在诸多限制条件下进行福州左海公园风情园的设计,巧妙构景,因势借景,注重环境对人造景观的衬托效应,同时对以人造景观为主的园林设计进行探讨。  相似文献   

A methodology for evaluating a location as a selection site for an international plant breeding program     

Federico Cuevas-Pérez  María Cristina Amézquita  Manuel J. Rosero 《Euphytica》1989,43(1-2):165-172

Summary A method for comparing locations as selection sites based upon their abilities to predict yield and disease reaction over a target region is proposed. The probability of coincidence in selection for a site is defined as the probability for a line selected at the site to be selected at other sites within the region. The probability of divergence in rejection is defined as that associated with regional selection of a line given that is discarded by the site where selection is being conducted. The ideal selection site would maximize the probability of coincidence in selection and minimize the probability of divergence in rejection. The method is illustrated using a set of data from the rice yield nurseries of the International Rice Testing Program for Latin America planted under the rainfed conditions of Central América and México during the period 1978–1984. Five locations were compared for their predictive ability in selecting for the rainfed rice growing region, based on yield and disease reaction. Selection for yield was defined as performance superior to the best check in each location. Selection for disease reaction was based on an index derived from the Standard Evaluation System for Rice for diseases of regional importance. Locations varies 10–15 percent in their selection coincidence with the region for both yield and disease selection criteria applied independently.  相似文献   

Do artificial waterholes influence the way herbivores use the landscape? Herbivore distribution patterns around rivers and artificial surface water sources in a large African savanna park     

Izak P.J. Smit  Cornelia C. Grant 《Biological conservation》2007,136(1):85-99

It has been argued that the wide-scale provision of artificial surface water in semi-arid savannas may result in homogenisation of foraging regimes, compromising biodiversity and ecosystem resilience. This is the first landscape-scale study investigating to what degree artificial waterholes and natural rivers influence the distribution of large herbivores, and hence foraging patterns, in the Kruger National Park, South Africa. This is explored by examining consistencies within and differences between distribution patterns of herbivore feeding groups on different geologies. Seven years of dry season aerial census data of thirteen large herbivores were analysed in a GIS. It was found that different herbivores exhibit different distribution patterns around rivers and waterholes. It was found that most grazer species were associated with artificial waterholes, whereas browsers and mixed feeders were indifferent to waterholes and were associated with the main rivers. This has important management implications for artificial water provision in the KNP and potentially for other semi-arid African savanna conservation areas. Man-made waterholes are therefore features in the landscape that can change the distribution of herbivores, even in a landscape where natural water is available, transforming patterns of landscape use. Furthermore, it was also found that the underlying geology interacts with water distribution in shaping herbivore distributions, with artificial waterholes and rivers acting as stronger nodes of herbivore activity on nutrient-rich basaltic soils than nutrient-poor granitic soils. The results from this paper may be useful for designing surface water policies and management plans for Kruger and other savanna reserves in Africa in order to maximise biodiversity conservation.  相似文献