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本文报道了寄生杨潜叶叶蜂Ｍｅｓｓａ ｔａｉａｎｅｎｓｉｓ Ｘｉａｏ ｅｔＺｈｏｕ幼虫的一种重要天敌。经鉴定这种天敌隶属于栉足姬蜂亚科Ｃｔｅｎｏｐｅｌｍａｔｉｎａｅ针尾姬蜂族Ｐｉｏｎｉｎｉ的一新属一新种。现命名为杨潜姬蜂Ｃｅｌａｔａ ｐｏｐｕｌｕｓＷａｎｇ。 相似文献
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本文报道了寄生杨潜叶叶蜂ＭｅｓａｔａｉａｎｅｎｓｉｓＸｉａｏｅｔＺｈｏｕ（叶蜂科Ｔｅｎｔｈｒｅｄｉｎｉｄａｅ，小黑叶蜂亚科Ｈｅｔｅｒａｒｔｈｒｉｎａｅ）幼虫的一种重要天敌。经鉴定这种天敌隶属于栉足姬蜂亚科Ｃｔｅｎｏｐｅｌｍａｔｉｎａｅ针尾姬蜂族Ｐｉｏｎｉｎｉ中的一新属一新种。现命名为杨潜姬蜂ＣｅｌａｔａｐｏｐｕｌｕｓＷａｎｇ。 相似文献
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杨树蛀虫姬蜂种类的研究 总被引：2，自引：0，他引：2
本文报道了中国寄生杨树蛀虫的姬蜂种类１０种，分别隶属于４亚科，７属。其中有４种国新记录种：收获兜姬蜂Ｄｏｌｉｃｈｏｍｉｔｕｓ ｍｅｓｓｏｒ，杨兜姬蜂Ｄ．ｐｏｐｕｌｎｅｕｓ，杨蛀姬蜂Ｓｃｈｒｅｉｎｅｒｉａ ｐｏｐｕｌｎｅａ，杨木卫姬蜂Ｘｙｌｏｐｈｒｕｒｕｓ ｄｉｓｐａｒ。 相似文献
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本文报道了在辽宁省发现的姬蜂科中国一新纪录属：凹唇姬蜂属ＤｅｌｏｍｅｒｓｔａＦｏｅｒｓｔｅｒ（１８６８）；二新纪录种：长尾凹唇姬蜂Ｄ．ｌｏｎｇｉｃａｕｄａＫａｓｐａｒｙａｎ和狭曲脊姬蜂Ａｐｏｐｈｕａｓｔｅｎａ（Ｕｃｈｉｄａ）。并简述了形态特征及分布。 相似文献
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舞毒蛾黑瘤姬蜂生物学特性初报 总被引：3，自引：0，他引：3
舞毒蛾黑瘤姬蜂生物学特性初报王昌贵（日照市林业局）于振伟（日照东港区四中学）尹衍民（东港区奎山办事处林业站）舞毒蛾黑瘤姬蜂Ｃｏｃｃｙｇｏｍｉｍｕｓｄｉｓｐａｒｉｓ（Ｖｉｅｒｅｃｋ）属膜翅目、姬蜂科，在鲁东南沿海和苏北地区普遍发生，是多种鳞翅目害虫的重... 相似文献
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FORESTAR：A decision—support system for multi—objective forest management in Northeast China 总被引：11，自引：0，他引：11
SHAOGuo-fan DAILi-min LIYing-shan LiuYong-min BAIGuang-xin 《林业研究》2003,14(2):141-145
Past monoculture forestry in China has contributed to countrywide ecological disasters and economic difficulties in forestry regions. China‘s new forestry programs, Natural Forest Conservation Program and Returning Farmlands to Forests Program, provide opportunities for ecosystem management of mountain forests in China. A decision support system, FORE-STAR, has been developed for better managing and protecting natural forests in Changbai Mountain area. It uses GIS-based forest inventory data at a scale of forestry bureau. The first version contains two sub-modules: forest operation and forest res-toration. Under each sub-module, users can compare several decision options and make optimal choices. It can help field for-esters, forest managers, and policy makers make multi-objective and consistent decisions in planning forest management at hierarchical administrative scales. 相似文献
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本研究以开封市康平河森林公园为例，分析游客环境教育需求，为城市公园环境教育功能的实现提供参考。通过问卷调查、Kano模型与Better-Worse系数法对公园进行需求类型调查、重要程度排序与人群差异化分析。研究表明在五类一级需求中需求重要度依次为设施需求、工作人员需求、教学形式需求、费用需求、活动内容需求，在游客需求差异化分析中园内设施与活动内容需求差异最明显。得出以下结论：应对公园设施进行合理规划；增设咨询服务点及解说设施；设置多种形式的环境教育活动；增设环境教育相关人员岗位并做好培训；注重差异化设计。 相似文献
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Economic research has become more empirical, and much of the shift has been due to the broad applications of impact evaluation (or IE) methods for measuring the potential effects of policies or programs on outcomes of interest. The objective of this article is to introduce the essential IE methodology and literature to the audience of this journal and discuss how we can take advantage of these research developments to improve the quality of our own work and subsequent publications. Following an overview of the core IE concepts and methods, we will give an overview of the recent uses of these methods to address forest policy issues and outline the basic steps of sampling and data generation involved in an IE study. 相似文献
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Poplars (Populus spp.) have been planted in Europe and Asia since very early times. Known in the Near East as the blessed tree, poplars have been the primary timber producer in regions lacking natural forests in the northern hemisphere. Now, though, we are seeing poplar plantations becoming part of the forest resources even in the abundantly forested Pacific Northwest. Though still a minor contributor to the world's timber supply, the area of land planted to poplars is, nevertheless, increasing rapidly, particularly in China, South Korea, and the United States. The 1992 report from the International Poplar Commission listed nineteen countries with at least 10,000 ha of planted poplars and seven with more than 100,000 ha. Much of the success of poplar plantations results from the breeding of fast-growing and disease-resistant poplar hybrids. Accordingly, at least eleven countries support poplar breeding programs. Uses of poplar wood range from peeled poles for rafters and other elements of construction in agrarian economies to the manufacture of paper, plywood, oriented strand board, and engineered lumber in industrial nations. Interest has also developed in poplar plantations as a renewable source of energy. 相似文献