苏北沿海农田复合结构林网规划设计

本文将如东县环农乡和新光乡的农田林网立地划分为3个类型。规划设计并实施了复合结构的农田林网。     

8051单片机C51集成开发系统

本文介绍一款成本低、功能齐备、操作容易、效果直观 ,集C51学习、编程、烧录和效果实验为一体的8051单片机集成开发系统。该系统提供Windows界面下的中文C51软件开发平台 ,以及编程和试验的硬件操作平台 ,并提供集成开发系统的全部设计原理图。     

Global Dryland Ecosystem Programme(G-DEP): Africa consultative meeting report

In order to enhance and restore the ecosystems of natural capital in African arid regions, the Global Dryland Ecosystem Programme(G-DEP) consultative meeting was hosted in Dakar, Senegal, from 23 to 25 September 2019. This paper details the first African meeting of the G-DEP. Consultative meeting reviewed preceding dryland ecosystems case studies, identified vulnerable arid and semi-arid regions, and proposed sustainable solutions to problems. It also identified the successes and failures of previous attempts to improve vulnerable ecosystems and ultimately formed an action plan to improve these attempts. Climate, ecosystems, and livelihoods for Sustainable Development Goals(SDGs), Great Green Wall Initiative(GGWI) for Sahara and Sahel, and China-Africa cooperation on science, technology, and innovation are three extra main sections concerned of the meeting. Separately, more specific topics as the complicated relationship between these natural processes and human activity, including pastoralism, soil restoration, and vegetation regenerate techniques, were fully discussed. Consultative meeting also identified the positive effects international collaboration can have on dryland regions, specifically in the capacity of sharing information, technology, and innovation on purpose to develop a joint proposal for long-term research programs in African arid and semi-arid areas. Moreover, meetings that review the progress made on ecosystem management for the sustainable livelihoods in Africa, identification of priority areas, and the development and implementation of ecosystem programs for proper research and collaboration in African arid and semi-arid zones, have been proposed as strategic recommendations to enhance the global partnership for sustainable development. Furthermore, as the outcomes of the workshop, there are three steps proposed to handle African dryland climate changes, several aspects suggested to solve current dilemmas of the GGWI, and a series of actions recommended for G-DEP related activities in Africa.     

贵州省退耕还林工程雨雪冰冻灾害情况调研

2008年初在我国南方发生的特大雨雪冰冻灾害对贵州省退耕还林工程造成了巨大损失。通过对灾情的实地调研,深入剖析了工程恢复重建面临的主要矛盾和问题,提出了加强森林经营、安排专项资金用于工程重新造林或补植补造等具体措施和建议。     

制定《农业科技发展纲要》,推动农业科技革命

6月30日,国务院总理朱镕基主持国家科教领导小组会议,决定制定《农业科技发展纲要》,确定未来15年我国农业科技的发展方向和“十五”农业科技的工作重点.《纲要》编制工作由科技部、农业部牵头,全国28个部委办局参加.制定《纲要》是新时期农业和农村发展的客观需求,也是我国实现跨世纪农业和农村经济战略目标的根本保证.是指导未来15年农     

世界粮食计划署治理体系及文件框架研究

世界粮食计划署是联合国系统内致力于在全球抗击饥饿、提供紧急粮食援助、改善营养状况并帮助贫困地区建设恢复生产力的专门机构。作为对该机构的系统性解读,本文梳理了世界粮食计划署治理体系及其文件框架,并在此基础上总结其治理方式,明晰其管理动向。此外,通过对世粮署治理新趋势的归纳,初步探索了与之相适应的工作方式和工作内容的调整,以期进一步推进中国与世粮署的务实合作。     

深圳2011年世界大运会赛时花卉布置规划与实践

文章主要对深圳2011年世界大学生夏季运动会赛时花卉布置的背景、规划方法、策略、品种选择等方面进行了阐述和总结，展示了赛时重要节点花卉布置的实施效果。并对解决存在的问题提出了建议。     

Bull Selection across Age Classes and Variable Female Reproductive Rates in an Open Nucleus Breeding Scheme for Dairy Cattle

Different bull selection strategies and female reproductive rates were simulated under various selection intensities and mating strategies in a nucleus with testing capacity of 80 cows. In all schemes, donor cows were selected after first lactation and bulls were progeny tested. In some schemes, non-progeny tested nucleus bulls could be selected. The nucleus was open on the male side but closed on the female side after nucleus born cows were available. Pedigrees of animals born outside the nucleus were sampled from the Finnish Ayrshire population. Female reproduction rate was either constant or variable. Schemes were compared according to genetic response, and risks measured by rate of inbreeding and coefficient of variation in genetic response between simulation years 5 and 20. Inclusion of one- or three-year-old bulls increased genetic response by 9% and rate of inbreeding up to 81%. Variation in female reproductive rate reduced genetic response by at most 8%. Increase in risks was averted by limiting the number of female full-sibs. Schemes with low selection intensity and factorial mating provided the best results.     

Outdoor recreation in forest policy and legislation: A European comparison

The benefits of outdoor recreation and the need for recreation inventories and monitoring are described in various policy and legislation documents at the European level. The objective of this paper is to analyse how these recreational aspects are reflected at the national level in core forest policy and legislation documents as well as related domains. The COST Action E33 network was used to extract information about national policies and monitoring practices for international comparison, using the Delphi method. The results provide insights into national policy setting and legislation in the field of outdoor recreation, and reveal similarities, differences, gaps and future needs. Among the main findings is a contradiction between the expressed political importance of outdoor recreation at the national level, and the absence of binding commitments for action. The majority of the countries surveyed recognise and express outdoor recreation in some form of political and/or legislative way. However, recreation monitoring or measurements are rarely mentioned in relevant policies or acts at the national, regional or local level, perhaps due to a lack of political will or resources. The analysis indicates that a consistent forest recreation monitoring system, linked to sustainable forest management, as described for example in the Helsinki process, should be better transferred into national policy and legislation. Comparable data across Europe could then provide a sound base for making decisions on outdoor recreation policy, planning and management, and furthermore provide a basis for the detection of societal changes and demands over time.     

信阳市自然保护区现状调查与规划研究

在对信阳市自然保护区现状调查的基础上 ,根据信阳市自然环境实际 ,参照国家及河南省自然保护区建设与规划要求 ,对信阳市自然保护区进行了规划研究 ,并提出了管理对策