This paper deals with the fluxes of nitrous oxide from green - house soil , the methane oxidation by the soil , and microbiological mechanisms . the results obtained were reported as the followings : 1 ) it showed that the flux of n2o from the greenhouse was much higher than that from the bare land 因此,研究农业设施栽培条件下,甲烷和氧化亚氮排放及其微生物学机理,既可明确甲烷和氧化亚氮的排放通量,又能提供有效控制甲烷和氧化亚氮排放的措施,为农业和环境的可持续发展提供科学依据。
With the fast urbanization process in china , the quality of the environment increase slowly and the sustainable development of the environment is threatened . the compactness between the landscape pattern and the healthy city was not considered in the city construction , which had been violated many national processes 在当前中国城市化大发展的情况下,城市自然景观与城市生态环境的紧密关系在城建工作中得不到应有的重视,城市建设中仍有许多与自然过程相违背的地方,使得城市环境质量的提升相当缓慢,城市环境的可持续发展受到威胁。
Experimental research , demonstration and extension conducted by china , as well as many years of practice in canada , have shown that the development of conservation agriculture can reduce water and soil erosion , reduce dust , resist drought , save water , increase the soil fertility and increase the efficiency 中国开展的试验研究示范推广和加拿大多年的生产实践证明,发展保护性耕作,可以减少水土流失抑制扬尘抗旱节水增肥地力节本增效,达到保护农田与生态环境的可持续发展目标。
Based on the previous background and situation , this dissertation tries to analyze the traditional village in the xerothermic area of northwest china from the influences of ecological environment ( especially regional climate ) on architectural form ; re - realize the value of traditional village ' s adapting to the natural environment ( especially climate ) , and re - recognize the value of traditional village in " survival gene " and seek a feasible pattern for the sustained development of this region ' s living environment 本论文正是基于以上背景和条件,从生态环境(特别是地域气候)对建筑形态影响的角度出发对我国西北干热气候区传统聚落进行剖析,重新认识传统聚落在适应自然环境(特别是气候)方面的价值;重新认识传统聚落“生存基因”方面的价值,为该地区人居环境的可持续发展寻求一种可行的模式。
Studying the development of the urban open green space in urban renewal , we discuss several subjects about the designing of open green space in the following four aspects : function and human behavior , construction of the urban landscape , urban ecological sustainable development , history and tradition of urban . these subjects are also studied by investigations and instances . finally , four basic principles of open green space designing are advanced in the end of this paper 文中分析了当前城市改造与更新中开放绿地的发展状况,从行为功能的满足、城市景观的塑造、生态环境的可持续发展、历史传统及文脉的传承等四个方面探讨,论述了城市开放绿地设计的一些问题,通过实例与实地调研,作了一定程度的探讨与研究,并由此提出了几项城市开放绿地的设计的基本原则。
The architecture of city norm is the institutional design of behaviors of governments , firms and citizens through the study of theoretical basis , formulation process and functions of city norm to realize the sustaining development of city economics , society and environment 城市规范设计,就是根据城市规范的本质,通过对城市规范的理论依据、形成过程、功能作用等的研究,对城市政府、企业、市民的行为规范加以制度设计,以实现城市经济、社会、环境的可持续发展。
Nowadays , mankind surviving environment of sustainable development becomes a fatal architecture problem in 21 century . from the high point of ecosystem environmental protection and sustainable development of human residing environment to see , sustainable development of habitation environment can be considered as an eternal and young problem 现今,可持续发展的人类生存环境已成为21世纪重大的建筑课题,从生态环保、人居环境可持续发展的制高点来审视,居住环境的可持续发展可以说是一个永恒而又年轻的课题。
This part is the premised before theoretically analyzing space structure of regional population and sustainable development . through the introduction of relative concept and theory , we propose two regional levels of this study : in the first level , we think region is a poly - regional system including society 、 economy 、 resource 、 environment 、 population and so on ; in the second level , it is a 在明确了人口在区域可持续发展系统中的地位和作用之后,区域人口空间结构与可持发展之间的理论分析从四个方面展开:人口空间结构与资源可持续发展、人口空间结构与经济可持续发展、人口空间结构与社会可持续发展以及人口空间结构与环境的可持续发展。
Based on the background of biologic measures applying in soil and water conservation , with the help of the monitor of environment restoration , starting with society . economy and environment , to achieve dynamic monitor and regular update of information , providing quantitative data for the restoration of areas suffering from water and soil losses , and furthermore to stride forward the development of biologic measures applying in soil and water conservation and to construct the sustainable development of society , economy and environment 以生物措施治理水土流失项目为背景,设计了生态修复监测系统,从生态、经济和社会效益入手,实现动态监测和信息定期更新,为水土流失区生态修复工作的开展提供定量数据,从而进一步推动生物措施治理水土流失的发展,营建社会、经济、环境的可持续发展。
It analyses , from the view point of the urban human settlement ' s ecologically space , the basic forms of communities of cities . additionally , it divides the human settlement into three parts : the human settlements , the natural ecological envkonment , and human & social envkonment , which form the basic framework of an index system for evaluating an urban human settlement . it demonstrates , by the example of the practice of guangzhou in building a " mountain - water ecologically - sound city " , that the ecologically - sound city is a desirable pattern of sustainable development of human settlements 一方面,从城市人居生态空间角度,分析了城市社区的基本形态及其城市生态位特征;另一方面,按照城市生态位内涵,将城市人居环境划分为人工聚居环境、自然生态环境和人文社会环境三大部分,以此构建城市人居环境评价指标体系基本框架,并以广州市“山水生态城市”建设实践为例论述生态城市是城市人居环境的可持续发展模式。