Study on the planning principles of urban forest

The urban forest is the main body for the urban forestry management. There are not unified rules and standards for the planning of the urban forest yet in China. This paper discusses the planning principles of the urban forest： the priority of the ecological function, the adaptation to local condilions, the optimization in the whole system, the mutual dependence of forest and city, the culturecontinuance and recreation satisfaction, sustainable development and operability, etc. This paper takes Changsha as an example to elaborate the planning principles of the urban forest. Firstly, Changsba urban forest ecosphere is composed of the eco-garden, the round-the-city forest belt, the ecological isolation belt, the green channel, the landscape of the rivers and streams, the forest park, the biodiversity reserve and the eco-forest in suburb area. It aims to make every kind of ecological essential factors organically merge into the complex city ecosystem to build an eco-city, to strengthen the connection of wide-open space with various habitats spots, to promote resident＇s accessibility, to perfect landscape ecology, and to make full use of the ecological function of urban forest. When we construct the urban forest, we must optimize the comprehensive benefit and make the urban forest structure and the layout in the best condition in order to buiM the harmonious green city for both man and nature to realize the whole optimization of the city system by the complex functions of the urban forest in ecology, environmental protection, landscape, recreation, etc.     

试析森林生态环境价值计量研究中的几种干扰因素

本文就目前影响在林生态环境价值计量研究的几个干扰因素进行剖析。其中主要包括森林生态环境难以进入市场的原因；在林生态环境资源并不是都重要计量；森林生态环境的价值既是哲学的价值也是经济学上的价值；森林的生态环境转移与它的价值转移没有实现统一；森林生态环境价值计量使用的概念需要明确和统一；在林生态环境资源的监测和统计；影子价格理论在森林生态环境价值计量中应用的合理性；森林生态环境资源生产的投入产出进行过程等问题。这些问题如果得到及时解决，将有助于在林生态环境计量的进一步研究。     

高尔夫球场扩增的环境生态效应

近年来．国内修建高尔夫球场有愈演愈烈之势．这与我国的国情不符。本文从高尔夫球场的群落生态学特征出发．对高尔夫球场在土地资源、水资源、环境污染、生物多样性破坏、城镇生态系统稳定性及生态承载力等六个方面的影响进行论述，分析了高尔夫球场扩增的环境生态效应．在此基础上提出了相应的减负对策。     

金融生态建设与信贷风险控制——一个基于破产金融机构信贷风险的实证分析

金融生态建设是一项长期的、复杂的系统工程,金融生态环境与银行信贷风险息息相关。本文通过对破产金融机构信贷风险的实证分析,指出我国县域金融机构金融生态的劣质性主要是制度性欠缺导致的,其中的关键是管理制度不规范,包括行政制度、信贷制度、法律制度与信用制度的缺失,从而导致信贷风险等一系列问题的发生。最后,本文提出金融生态的改良必须彻底转换政府理念,实施金融机构战略转型,并在全社会推进信用工程建设。     

加强林业技术发展的研究

林业建设的长期实践表明，林业的发展越来越依赖林业技术的进步。本文从宏观、中观和微观各层面分析了林业技术发展对林业发展的重大意义，并在此基础上进一步分析了当前我国林业技术发展的现状——林业技术既取得了巨大发展．但同时又存在很多不足，如林业技术成果转化事低、技术推广效益低、高新技术水平落后于发达国家等。此外．本文还分析了制约林业技术发展的因素：林业技术意识薄弱、投入不足、推广效益低下、自主创新和引进消化吸收能力弱等，并提出了进一步发展我国林业技术的对策。     

道家生态和谐思想与新农村生态和谐思维

道家以"道法自然"为最高准则构建了一幅人与人,人与天、自然相和谐的生态理想境界。这对于建设社会主义新农村,培育人们的生态和谐思维:维护新农村生态系统和谐、人与自然和谐、自然界内部和谐具有积极意义。     

A theory of natural addiction

Economic theories of rational addiction aim to describe consumer behavior in the presence of habit-forming goods. We provide a biological foundation for this body of work by formally specifying conditions under which it is optimal to form a habit. We demonstrate the empirical validity of our thesis with an in-depth review and synthesis of the biomedical literature concerning the action of opiates in the mammalian brain and their effects on behavior. Our results lend credence to many of the unconventional behavioral assumptions employed by theories of rational addiction, including adjacent complementarity and the importance of cues, attention, and self-control in determining the behavior of addicts. We offer evidence for the special case of the opiates that “harmful” addiction is the manifestation of a mismatch between behavioral algorithms encoded in the human genome and the expanded menu of choices faced by consumers in the modern world.     

沙棘与荒漠地区开发

我国正深受着土地荒漠化的危害，如何把荒漠变耕地，优选一种费用小、效果好的措施，那就是大种特种沙棘，以达到改善环境、发展经济、利国富民的目的。     

可持续发展视角下的大湘西民俗旅游开发

从大湘西的旅游资源来看,民俗旅游资源是其特色资源和优势资源,在开发中要树立大湘西民俗旅游可持续发展的理念,保护好民俗文化生态环境,实现民俗的保护、传承和旅游发展双赢.发展中要坚持民俗文化独特性等原则,选择原生态民族村寨等优化模式,并建立相应的保证机制.     

略论循环农业中的生态学原理

日趋严重的环境问题使人们更加关注农业的命运，循环农业的兴起，使人类看到了农业持续发展的希望。本文从循环农业中的生活型选择、限制因子定律与耐受性定律、正相互作用、捕食作用、寄生关系、生化他感、群落时空格局构建、边缘效应、演替作用、物质循环再生、生态效率以及生物操纵等多角度探讨了生态学原理在循环农业中的应用。