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Table of Content

    25 June 1988, Volume 3 Issue 2 Previous Issue    Next Issue
    Special Column:Celebration of the 70th Anniversary of IGSNRR, CAS
    THE METHODS CALCULATING THE SPATIAL DISTRIBUTION OF AGROCLIMATIC RESOURCES IN MOUNTAINOUS AREAS AND THE CLIMATIC EFFECTS OF MICROTOPOGRAPHY
    Lu Qiyao, Fu Baopu, Yu Jingming
    1988, 3 (2):  101-113.  doi: 10.11849/zrzyxb.1988.02.001
    Abstract ( )   PDF (555KB) ( )   Save
    In this paper, the methods calculating the spatial distribution of agroclimatic resources (temperature, humidity, precipitation, wind speed, etc.) in mountainous areas are presented. For suiting to the application of computer in the research of mountain climate, the calculating models are represented by functional relations and the spatial distribution maps of agro-climatic resources on fine mesh are drawed up by computer. The climatic effects of topography obtained from the application of these methods in the Shaxi River basin, in the midwest of Fujian Province, are also introduced. The effects of microtopography on thermal resources can be divided into four types: the temperature-increasing, -decreasing, -variable and -invariable, in which the greatest increasing and decreasing effects correspond to the effects of decrease and increase by 100-250 m in elevation respectively. The effect of meso- and microtopography on precipitation is affected by the topography and the prevailing wind direction with precipitation. And the effect of microtopography on wind speed is related to the topography and the angle between the wind direction and the topography. The spatial distribution maps of accumulated temperature above 10℃ (∑t10) and annual precipitation (P) in the Shaxi River basin show that the methods of calculation proposed in this paper may effectively disclose the macro and micro variations of spatial distribution of agroclimatic resources in mountainous areas, and their effects are very satisfactory.
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    ON THE LAND AND BIOLOGICAL RESOURCES OF SEACOAST ZONE AND THEIR EXPLOITATION AND UTILIZATION OF CHINA
    Song Daquan
    1988, 3 (2):  114-120.  doi: 10.11849/zrzyxb.1988.02.002
    Abstract ( )   PDF (394KB) ( )   Save
    This paper deals with the new tendency about the land and biological resources of seaco-at zone and their exploitation and utilization of China, which discusses about the soils and land resources, biological resources, which including living organisms fragmites, shelter belt trees, mangloves, and Spartine anagleca, of seashore zone and their exploitation and utilization.After the exploitation and utilization of the resources of the seacoast zone, it should be greatly hasten the economic, social and ecological benefits of China.
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    ON STRATEGIC CONCEPTION OF ECONOMIC DEVELOPMENT IN HAINAN LSLAND
    Wen Changen
    1988, 3 (2):  121-129.  doi: 10.11849/zrzyxb.1988.02.003
    Abstract ( )   PDF (654KB) ( )   Save
    Hainan Island is the largest island of tropical zone in our country. It has plenty of natural resources, good geographic position and great potentialities of economic development. It has also a special strategic significence in the developing of national construction.Because Hainan Lsland is situated in the open front line of China and the world economic centre is now transfering to Asia-Pacific area, we ought to fully utilize these favourable conditions and develop economic relations with countries of the world and further expand the backing role of the mainland.The strategic aims of economic development in Hainan Island are as follows; 1. to make Hainan Island into a synthetic open area, in which trade, industry agriculture are integrated and banking, toursim, service etc are managed simultaneously. 2. a new island with reasonal-ble industrial structure, advanced science and technology, well-off life and high level of material civilization and mental civilization. 3, to work out plans such as strengthening macrocosm research, controling population, developing industry and agriculture, selecting talent people and setting up provincial level administrative body. 4. to take measures to make adjustment promote open and development, regulate industrial structure, introduce foreign capital and ally with mainland positive factors, strengthen capital construction and pay more attention to intelligence invest and scientific research. 5. to abopt more favourable policies in order to encourage the investors of mainland and foreign countries to set ap factories on Haitian Island. 6. to develop tropical crops, tropical forestry, cultivating, tropical product processing, tourism, energy resources and mineral resources. 7. to improve transport and communication conditions and set up different types of factories.There is a vast prospect of economic development on Hainan Island. As long as we insist on long-term open policy, well absorb the strong points of mainland and abroad to make Hainan Island become one of the important bases to realize the vigorous economic development of our country in the end of the century and a pioneer to make our country go into the advanced ranks of the world in the next century.
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    PRELIMINARY RESEARCH ON THE NECESSITY AND POSSIBILITY OF DEVELOPING ECOLOGICAL AGRICULTURE IN GONGHE BASIN, QINGHAI PROVINCE
    Shao Liye, Dong Guangrong, Jin Jun, Gao Shangyu
    1988, 3 (2):  130-140.  doi: 10.11849/zrzyxb.1988.02.004
    Abstract ( )   PDF (744KB) ( )   Save
    Gonghe Basin is Located in semiarid area with fragile ecological conditions, all kinds of desertified lands and limited natural hioresources. The over grazing have further leaded to the deterioration of ecological environment. In consideration of the actual conditions of the Basin, some measures to prevent land desertification, such as closing and slightly utilizing range lands, are difficult to be realized. Therefore, the necessity of developing ecological agriculture is proposed in this paper so as to fully tap the land potential and solve the contradiction of environmental development and protection. Following investigation results prove that there is possibility of developing cultivation in Gonghe Basin: 1) According to the contrast investigation on soil profiles, the wind erosion in farmland is slight, which can be prevented and avoided with assistance of artificial measures. 2) The mechanical analysis shows that the cultivated soil layer is slightly roughed, but the material is lost within farmland, where no fine sand composition is found. 3) The fixed and semi-fixed dunes already existing in the farmland edge have nothing to do with modern reclamation. 4) Some nutrient content in farmland are higher than that in primary grassland. Based on the investigation on natural conditions and trend prediction of environmental changes, through drawing successful experience from local agricultural production, it is considered that developing ecological agriculture in Gonghe Basin is prossible.
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    PREDICTION EQUATION OF SMALL WATERSHED SOIL EROSION ON THE LOESSAL GULLY HILL AREA
    Sun Lida, Sun Baoping, Xiji County, Ningxia Hui Autonomous Region, Chen Yu, Xu Yang
    1988, 3 (2):  141-153.  doi: 10.11849/zrzyxb.1988.02.005
    Abstract ( )   PDF (767KB) ( )   Save
    Based on the silt measure of reservoirs and ponds and the investigation ot all factors concerned, after the statistical analyses of all informations, this paper presents a mathematical erosion model used for the small watershed in the loess areas. The research results show: the prediction equation for annual soil loss in a small watershed which is based on the analyses of the leading factors has a higher precision. The equation objectively reflects the comprehensive roles between the concerned factors. It not only calculates, according to the given-data, both previous and present soil loss each year, but predicts the annual soil loss at a certain rainfall level in .the future. In the meantime, this paper more comprehensively makes quantitative analyses of soil erosion law in the loess hill area and indicates the interactions and relationships between the factors influencing soil loss. So it gives the reliable functions to establish a watershed management plan and to control soil erosion with the different efforts.The research results have been applied to the local areas and adopted by the foreign specialists of WEP/FAO evaluation mission.
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    THE PROSPECT OF DRYLAND FARMING AND IRRIGATED FARMING IN HUANG-HUAI-HAI PLAIN BASED ON THE ANALYSIS OF THE PRECIPITATION-SOIL-CROP SYSTEM
    Han Xiangling, Qu Weiqing, Kong Yangzhang
    1988, 3 (2):  154-161.  doi: 10.11849/zrzyxb.1988.02.006
    Abstract ( )   PDF (523KB) ( )   Save
    According to the analysis of the precipitation-soil-crop system in Huang-Huai-Hai plain, this paper suggests that due to the midsummer rainfall plays an very important role in supplying water to crops, so in this plain dryland farming have greater potentialities.In case of irrigation area which can not be largely improved recently, we should develop at the same time the dryland farming and irrigated farming in this area, and possibly use the natural resources (Climate, underground water and so on) to develop the dryland farming. In other case, we should also study the rule of water consumptioni n irrigation areaed for limit irrigation water. Some technique can be used for raising the efficiency of water utilization, such as the use of chemical fertilizer, antt-infil-tration irrigation system etc.
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    THE CALCULATION AND USE OF THE POTENTIAL EVAPOTRANSPIRATION FROM LOESS PLATEAU,——ABOUT THE WAYS OF ECOLOGICAL ENVIRONMENT REMEDY
    Wang Ling, Ni Jianhua
    1988, 3 (2):  162-173.  doi: 10.11849/zrzyxb.1988.02.007
    Abstract ( )   PDF (711KB) ( )   Save
    The potential evapotranspiration is an important characteristic value in climatology. The water conservancy project, the planning of irrigation requirement and the rational distribution of agriculture, forest and animal husbandry, all are based on the potential evapotranspiration. The formula of Penman has the advantages of more reliable physical basis and higher computed precision. It has been widely applied by the countries in the world. But when it was applied by the scholars in China, they d...
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    COMPUTER-AIDED MAP OVERLAY ANALYSIS AND ITS APPLICATIONS TO THE STUDIES OF NATURAL RESOURCES
    Zhu Xuan
    1988, 3 (2):  174-185.  doi: 10.11849/zrzyxb.1988.02.008
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    Computer-aided map overlay analysis is an efficient means of multi-element analysis. It nay be used in the synthetic qualitative and quantitative analysis of varied elements of environment and resources. It includes polygon overlay analysis and grid overlay analysis. The paper deals with the principle and method of polygon overlay analysis as well as the basic thoughto of its programming. Its application fields in the studies of natural resources are examined. A practical example is given to illustrate the method and course of using it. Computer-aided map overlay analysis may be applied to statistical calculation, classification, assessment of natural resources, etc. It is of practical significance to the studies of natural resources, especially agricultural land resources.
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