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    1991年, 第1卷, 第2期 刊出日期:1991-06-20 上一期    下一期
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    CURRENT STATUS, CAUSES AND REMEDIAL STRATEGIES OF CHINA,S ECOLOGY AND ENVIRONMENT
    胡鞍钢, 王毅
    1991 (2):  97-108. 
    摘要 ( 683 )   PDF(689KB) ( 871 )  

    The existence and development of the Chinese nation have been severely challenged by a sharp increase in population, a shortage of natural resources and damage to ecological system, since China began to industrialize in the 1950s. Based on long-term and in-depth research on the ecology and environment of China, this paper presents the background, basic status, characteristics, causes and remedial strategies. countermeasures.

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    AN ANALYSIS OF RELEVANT CONDITIONS FOR DEVELOPING RESOURCE-TYPE INDUSTRIES IN CHINA
    李文彦
    1991 (2):  109-120. 
    摘要 ( 647 )   PDF(678KB) ( 823 )  

    Resource-type industries are significance in national economy in the initial stage of industrialization and urbanization in developing countries including China. China is abundant in energy resources, but their distribution is uneven. The prospect of iron and steel industry from the supply of iron ore and coal as well as nonferous metallurgical industry, and chemical industry, is discussed. Processing of agricultural product is an important component of resource-type industries, and the base of light industry. The current status of light industry and different potentials in China's provinces are analysed. The author classifies all provinces into five types according to the spatial combination of minerals in China, and argues that four indicators have to be taken into account with regard to the appraisal of geographical position.

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    A STUDY ON THE ECOLOGICAL CLIMATES OF SOME FAMOUS TEA GROWING AREAS IN HIGH MOUNTAINOUS REGIONS OF CHINA
    黄寿波
    1991 (2):  121-128. 
    摘要 ( 537 )   PDF(439KB) ( 797 )  

    The tea tree [Camellia sinensis (L) Kuntze] is one of the world's economic crops. It is an especially important crop for southern China. Environmental factors related to the tea yield and quality in some high mountain areas of China are identified in this paper. These factors are: geology, topography, climate, hydrology, soil and vegetation. Climatological factors are the most important. Using data collected from meteorological stations which are situated at the summit and the base of high mountains, this paper discusses ecological climatic problems in growing tea in China. The ecological climatic characteristics of the famous tea areas mainly included are as follows: more . amounts of clouds and fog, less percentage of sunshine, abundant rainfall and high relative humidity in the air, temperatures that rise and fall slowly, daily and annual temperature ranges that are smaller, more days that are suitable for tea growing and low wind speeds in the lee-sides and valleys of mountains. All of these factors are favorable for growth of tea trees.

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    A STUDY ON RATIONAL LOCATION OF THE COTTON PRODUCTION IN CHINA
    祝卓
    1991 (2):  129-140. 
    摘要 ( 547 )   PDF(696KB) ( 861 )  

    Cotton is the leading cash crop in China. The cotton sown area accounts for about 30per cent of the total sown area of all the various cash crops. It is the main material used in the textile industry in China. More than 95per cent of textile materials were cotton during the 1950s; and it still occupies 80per cent at present. There are some problems concerning rational location of cotton production in China. In order to solve the problems existing in civil cotton production and supply, in view of strategy, a number of cotton production bases must be selected and built step by step in a planned way. The location of cotton production should be adjusted progressively in accordance with the existing problems. The existing cotton production regions should be consolidated and improved. The cotton production region of the middle and lower reaches of the Huanghe River should be renewed quichly to make it become the largest stable and high-yield cotton preduction region. In the regions with suitable natural conditions and large water and soil potential, new cotton production regions should be developed in a planned way. In the regions where natural conditions are unsuitable or the competition between grain and cotton is sharp, cotton may be replaced by grain and other crops. In the self-supporting regions one should raise the yield per unit areas, not exparde the fields.

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    ESTIMATION AND EXPLOITATION OF WATER RESOURCES IN THE SANJIANG PLAIN
    郭大本
    1991 (2):  141-153. 
    摘要 ( 737 )   PDF(585KB) ( 873 )  

    According to practical measurement and related data, the writer discusses the main features of rivers in the Sanjiang Plain and the change of water balance with time and space, and then estimates water resources of five types, namely, runoff, ground water, soil water, and water supplied by three rivers and lakes (or reservoirs).The total volume of the above-mentioned water resources can be up to 31.5 billion m3. But they are rather unevenly distributed and the annual change is considerable, too. Up to now, only 8.3% of water resources have been utilized. According to a programme, 17.5 billion m3 will be utilized in the future in the district. Rationally exploiting water resources in the district should be combined with protection and management, and the sole criterion for judging rationality of utilization is that whether it is beneficial to economic, ecologic and social aspects.

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    NUMERICAL CLASSIFICATION OF REGIONAL STRUCTURE OF AGRO-ECOSYSTEM IN GUANGDONG
    罗曼嘉
    1991 (2):  154-165. 
    摘要 ( 659 )   PDF(563KB) ( 691 )  

    On the basis of "The Statistical Data of Guangdong Province in 1981" and the 14 selected original variables, 107 counties and suburbs in Guangdong are classified. In the classification, cluster analysis is applied, and the cluster hierarchy of the agro-ecosystem is achieved with a computer. According to output level, planting structure, and input level of energy, there is an evident regionalism in the agro-ecosystem of Guangdong, which presents approximately concentric circles centralized by Guangzhou City.

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    THE APPLICATION OF REMOTE SENSING TECHNIQUE ON GEOLOGICAL INVESTIGATION OF PLACER DEPOSIT
    万恩璞, 溥立群, 王野乔, 陈春, 刘殿伟
    1991 (2):  166-178. 
    摘要 ( 879 )   PDF(684KB) ( 870 )  

    The practice has proved that it is an economic and effective method to investigate placer gold deposit by using multi-level information sources of remote sensing and multi-variate analysis methods, especially for the area with a sparse population and difficult condition like the Da Hinggan Mountains, China.The information sources used in our work includes Landsat TM, aerial infrared photography and their mosaic image maps and enlarged photos with different scales. According to statistic data, in the study area the gold-bearing rocks are mainly granite, alaskite, granodiorite and some old metamorphic rocks. On gold-bearing geological structures, the fault zones in the four directions (NE, NNE, NW and EW) are obvious, in which NNE and EW are the most key fault zones. On fluvial geomorphology the flow courses stored placer are in the tributaries of the 4th and 5th levels, especially in straight or slight curve reaches. On the basis of analysis the interpretative signs were set up, and the interpretative work began on a sheet of picture with a single band at first, furtherly, the integral interpretation on color enlargement pictures the extraction and composition work was carried out by means of multicolor digital analyzer, and computer image processing equipment with the VAX 11/ 750 as a host computer so as to draw up the relatively specialized maps of placer deposit and delimit the locations of ore body on the pictures or on the screen. Finally, the satisfatory effect was achieved through a series of comprehensive analyses.

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    ECOLOGICAL PROBLEMS ON THE URBAN DEVELOPMENT IN THE TAIHU LAKE REGION OF SOUTHERN JIANGSU
    徐桂卿
    1991 (2):  179-187. 
    摘要 ( 669 )   PDF(541KB) ( 704 )  

    The Taihu Lake region in southern Jiangsu is one of the regions with flourishing economy and the highest level of urbanization due to favourable natural conditions and socio-economic foundation. However, there emerge a seriers of urban ecological problems on continuous stretch of cities and towns, a vague division of urban functions, ground subsidence, serious pollution of atmosphere and waters arising from dense population, irrational distribution of industry, backwardeness of municipal engineering facilities, and inexperienced scientific management of water resources. In order to improve the urban eco-environment in this lake region, we should work out an overall regional eco梕nvironmental programme, perfect the urban economic set-up from the reqirements of urban material circulations and energy exchanges, and finally put into practice the urban functional regionalism, so that the Taihu Lake region in southern Jiangsu has not only a higher economic benefit, but also a beautiful and comfortable eco-environment.

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    THE HOLOCENE ALONG THE COAST OF HAINAN ISLAND, CHINA
    张仲英, 刘瑞华
    1991 (2):  188-196. 
    摘要 ( 702 )   PDF(2611KB) ( 710 )  

    Based on the new data of the Quaternary along the coast of Hainan Island, China, this paper puts forward that the Holocene in Hainan Island can be divided into four formations: Wanning formation (Q41), Sanya formation (Q42-1), Qiongshan formation (Q42-2) and Ledong formation (Q43). Spore-pollen analysis shows that there are 6 spore-pollen zones existed, reflecting two cycles of climatic fluctuation from warm-dry to hot-humid. The climax of hot-humid period occurred 6,000-5,000 years B.P.. Based on the 14C dating data of the 38 samples representing the positions of ancient sea level, a breakthrough curve representing the sea level change during the Holocone is obtained, in which , a sea level change caused by tectonic movement is subtracted. Two cycles of rise-drop of sea level with three periods of high sea level were found. The period with the highest sea level is some 6,000-5,000 years B.P.. According to the rise-drop rate of sea level, four periods of the sea level change can be distinguished in the Holocene. The amplitude of the sea flunctuation is about ±6m over the past 6,000 years.

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