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Table of Content

    25 December 1991, Volume 6 Issue 4 Previous Issue    Next Issue
    Special Column:Celebration of the 70th Anniversary of IGSNRR, CAS
    THE "TREES-RUBBER -TEA" ECOLOGICAL MODEL IN THE CHINESE TROPICAL MONSOON REGION
    Zhan Xingzi
    1991, 6 (4):  293-302.  doi: 10.11849/zrzyxb.1991.04.001
    Abstract ( )   PDF (629KB) ( )   Save
    This paper is a summing-up of building the "trees-rubber-tea" ecological model in the National Nanhai Farm, Hainan province, in recent 16 years. The farm founded in 1958 is located in the wildness of the strong-wind region of northeastern Hainan island. Primarily the oil palms were grown, and then, by 1975, the "trees-rubber-tea" ecological model was introduced as a result of the reform of the production policy. After 16 years practice, this model shows great superiority and benefits. The benefits include improving the environment, increasing the economic benefit about 40%-200%, raising the land use rate above 50%, solving the problem of employment, and so on. This model is obviously an efficient way to reduce disasters, stabilize production, and rationally utilize the natural resources in the Chinese tropical monsoon region.
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    THE SUPERIORITY AND AGRICULTURAL UTILIZATION OF THE NATURAL RESOURCES OF THE LIAODONG PENINSULA IN LIAONING PROVINCE
    Han Jie
    1991, 6 (4):  303-310.  doi: 10.11849/zrzyxb.1991.04.002
    Abstract ( )   PDF (592KB) ( )   Save
    The Liaodong Peninsula in Liaoning Prov ince belongs to the broad-leaf forest landscape of warm temperate zone. Influenced by the ocean, the climate here is warmer and more humid than those of the areas of the same latitude in China, offering favourable conditions for 'he development of agriculture, forestry, fruits and sericulture in the area. Furthermore, the sea-coast of the Peninsula is tortuous and has many bays which are convenient for communication and fishery.In this paper, the main characteristics of physical geography, the superiority, uilization oriehtation and exploitation strategy of fhe natural resources of the Peninsula are discussed. At the same time, the author has pointed out that the development of fruits and sericulture should be carried out according to local conditions and that the resources of the ocean and seacoast should be exploited and utilized rationally. At the end of the paper, the seacoast of the area has been divided into 3 utilization sections, i.e., (1) the eastern coast should be mainly utilized for reclaiming fields from the sea and cultivating aquatic products, (2) the southern coast should be mainly utilized for cultivating aquatic products and developing seaports and tourism, and (3) the western coast should be mainly utilized for evaporating bring to make salts and cultivating aquatic products.
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    THE PREDICTION MODELS OF POPULATION AND GRAIN OUTPUT IN THE LOESS PLATEAU REGION
    Yuan Jiazu
    1991, 6 (4):  311-317.  doi: 10.11849/zrzyxb.1991.04.003
    Abstract ( )   PDF (372KB) ( )   Save
    In this paper, the population and grain output of the Loess Plateau region are predicted with the unequal interval time-series models. The accuracy of the models are 95.68% and 99.43% respectively. This provides a decision-making basis for working out a comprenensive exploitation plan in the region.
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    ESTIMATION OF THE CROP PONTENTIAL PRODUCTIVITY IN THE HEILONGGANG REGION, CANGZHOU, HEBEI, PROVINCE
    Liu Jintong, You Maozheng
    1991, 6 (4):  318-325.  doi: 10.11849/zrzyxb.1991.04.004
    Abstract ( )   PDF (523KB) ( )   Save
    On the basis of the estimation of the light-temperature potential productivity for different food crops (mainly wheat and corn), this paper according to the maps of the types of agricultural production level and the saline-alkali soil distribution compiled by using the TM satellite images (1:10000), gives corrections of irrigation, soil, fertilizer and agricultural technology level of the high-, middle-, and low-yield land by multihierarchical analysis. It further calculates the potential productivity at each level of different land types and crop potential productivity.This result shows that light-temperature potential productivity is 1470-1580kg/mu; the natural climatic potential productivity is only about 350 kg/mu, and the irrigation climatic potential productivity is clearly enhanced. The restrictive factors of soil and the irrigation condition are the main causes which lead to the complex regional distribution of the land potential productivity. It also shows that economical water utilization, more input of energy and better management are necessary to increase the productivity of the high- and middle-yield land.
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    RATIONAL LAND EXPLOITATION OF DRY VALLEYS IN THE HENDUAN MOUNTAINS REGION
    Li Mingsen
    1991, 6 (4):  326-334.  doi: 10.11849/zrzyxb.1991.04.005
    Abstract ( )   PDF (646KB) ( )   Save
    The dry valleys, where the annaul mean arridity is 1.3-5.0, and the ecological environment is very unique, intermittently distribute in the valleys of the Jinshajiang, Lanrhangjiang and Nujiang Rivers of the Hengduan mountai is region. Their total length is about 4400 km and their total area is 11000 km', approximately 2.6% of total area of the Hengduan mountain region. According to the difference in thermal conditions from south to north, they can be divided into 4 types, i.e., the hot dry valley, the warm dry valley, the temperate dry valley and the cool dry valley.The various suitability and high poten'ial productivity of the land resources cause these dry valleys to become areas of dense population and prosperous agriculture in the Hengduan mountains region. But, owing to less land resources suitable for cultivation, obvious soil erosion or land deterioration resulted from unreasonable cultivation and deforestation on slopes, the area of the dry valley is expanded day by day. This threatens the ecological balance of the whole Hengduan mountains region and brings about the intensification of the contradjctions among population, resources and environment. So in short and longer terms, the important management principles and effective measures for improving the ecological environment of the farmland in the dry valley and stabilizing the ecological balance of the Hengduan mountains region are (1) to rationally use and protect the various land resources, (2) to withdraw gradually the cultivated farmland from iteep slopes and expand the area of cash plants on the basis of the development of irrigation, the enhancement of the level of intensive cultivation and the increase in the production of grain, and (3) to protect and improve the vegetation cover of the dry valleys.
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    COMPILATION OF THE AGRICULTURAL CLIMATE-LAND RESOURCE MAP OF THE TORRID REGION IN YUNNAN PROVINCE
    Wang Ruiyun, Bian Fujiu
    1991, 6 (4):  335-343.  doi: 10.11849/zrzyxb.1991.04.006
    Abstract ( )   PDF (353KB) ( )   Save
    The Yunnan torrid region located geographically in a special place with very complex topography has rich and various agricultural climate and land resources. To meet the principal demands of exploiting the torrid region, the authors have worked out a set of maps, and hope it could provide a significant scientific oasis for the authorized administrations at different levels to make proper projects when they want to exploit the torrid region.This paper has combined together two different specific contents which are agricultural climate and land. Thus you can see two specific contents in one graphic spot. The authors classify the whole region into different small regions according to the true features of the region and then draw them up and calculate out the area of each region. The method of drawing the map is as follows: At first determine a reasonable and simple classification index; Next divide the whole region into two regions as the rirst class index according to heat; Then divide them again into even smaller regions as the second class index according to water and topography as well as the land slope; At last, the whole region is divided into 30 small regions with different climate and land type. Following the above work, the graphic spot margins are drawn according to the relevant elevation, topography, siol, vegetation and so on. Finally, the map(l:500 000) is finished and the area of each region calculated.What the authors have done is a new trial among similar researches. It is hoped that it cound be useful to guiding the exploitation of the Yunnan torrid region.
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    ACCELERATING THE EXPLOITATION OF HYDROPOWER RESOURCE TO SOLVE THE PROBLEMS OF ELECTRIC POWER DEFICIENCY IN CHINA
    Song Zeimin
    1991, 6 (4):  344-351.  doi: 10.11849/zrzyxb.1991.04.007
    Abstract ( )   PDF (578KB) ( )   Save
    In this paper, a few problems of electric power deficiency throughout our country are discussed. Since the year 1971, the electric pow r deficiency in a period as long as twenty years is caused by the deficiency of energy (coal and petroleum). Furthermore, the energy deficiency will continue till the last of this century. So, the problems of electric power deficiency can not be solved by accelerating the development of thermal power alone. But if accelerating the development of hydropower simultaneously, these problems can be solved by the end of this century
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    A RESEARCH ON THE EXPLOITATION AND UTILIZATION OF THE WATER POWER TRANSPORTATION RESOUR CES OF THE YANGTZE RIVER
    Li Zhan
    1991, 6 (4):  352-360.  doi: 10.11849/zrzyxb.1991.04.008
    Abstract ( )   PDF (605KB) ( )   Save
    The exploitation and utilization of the water power transportation resources of the Yangtze River are particularly studied from the standpoint of comprehensive utilization of water resources. The great potential capacity of the water power transport resources of the Yangtze River is analysed and the backward situation and its causes of making use of the Yangtze water power transportation resources are found out. According to the results of research, calculation and evaluation, the methods and plans of developing and utilizing the Yangtze water power transportation resources are set forth. This may be for the reference to the related decision-making departments.
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    INDUSTRIAL DEVELOPMENT IN THE EASTERN HEBEI PROVINCE AND WATER RESOURCES EXPLOITATION OF THE LUANHE RIVER
    Huang Rangtang, Lin Yaoming
    1991, 6 (4):  361-369.  doi: 10.11849/zrzyxb.1991.04.009
    Abstract ( )   PDF (676KB) ( )   Save
    Benefit from the favourable geographic conditions, the convenient transportation, the abundance of mineral resources and the solid industrial foundation, the eastern part of He-bei province will be the important industrial base in the Beijing-Tianjin-Tangshan area. Following the coal mine exploitation, the iron and steel industry will be dominated in the area. The present water supply for urban and industry use is limited by the inadequare water resources system. Researching into the conditions of the water resources and the development of industrial water supply, this paper discusses th exploitation of water resources and principal layout of the facility of water supply, and suggests that it is of great significance to build the Taolinkou Reservoir. Meanwhile, the paper proves the reliability of the water resources for establishing a large industrial base in eastern Hebei Province.
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    A PRELIMINARY STUDY ON THE PHYSICAL PROPERTIES, MOISTURE CONDITION, AND WATER RETENTION ABILITY OF THE SOIL UNDER THE EVERGREEN BROAD-LEAVED FOREST OF THE JIULIAN MOUNTAIN-IN JIANGXI PROVINCE
    Li Changhua, Li Zhongju
    1991, 6 (4):  370-379.  doi: 10.11849/zrzyxb.1991.04.010
    Abstract ( )   PDF (613KB) ( )   Save
    The soil that we studied is located on the Jiulian mountain natural reserve of Jiangxt province, and is under the evergreen broad-leaved forest. It is a moumainouns soil. We deter-mined the physical properties and the seasonal dynamic change of soil moisture (for one year in succession) of the soil, and with these data we analysed the water retention ability of the soil.The soil possesses good physical properties: the soil texture is mainly loamy clay and clay loam, the bulk density is small (0.88-1-29), the porosity is large (51.7-65.4%), the permeable velocity is fast (17.4-142.8cc/min), and the maximum moisture holding capacity is high (occupying 50.6-58.2% Of the volume).The drainage of the soil is good, and the moisture of the soil is sufficient. The moisture content is more than 30% in most part of the year. The annual ranges of moisture content are: 0-15cm layer, 26-56%; 15-30cm layer, 26-45%; and 30-50cm layer, 26-45%.We analysed the water retention ability of the soil with the dafa of prermeable velocity and maximum moisture holding capacity of the soil, and compared it with the red soil of the hilly land, the results are as follows: the permeability is 3-5 times as much of the red soil; the capability of absorbing rainfall is 219% of the red soil.
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    THE SIMULATION MODEL OF THE SYSTEM OF INDUSTRY ECONOMY-WATER RESOURCES-WATER POLLUTION AND ITS STRATEGY ANALYSIS IN THE ANNING INDUSTRIAL REGION, YUNNAN
    Tao Wendong
    1991, 6 (4):  380-388.  doi: 10.11849/zrzyxb.1991.04.011
    Abstract ( )   PDF (596KB) ( )   Save
    Water resources shortage and water pollution are the major limiting factors to the economic development of the Anning industrial region. This paper divides the industrial region into 3 sub-regions and establishes a multi-regional interrelated system dynamic model of the system of industry economy-water resources-water pollution in the Anning industrial region. The industrial output value, industrial water supply gap and water pollutant concentration of the 3 sub-regions are predicted for the period 1985 to 2000 with the model. On the basis of the integration of the 3 sub-regions, the optimum scheme for coordinating the industry economy, water resources and water pollution is sifted out by using the multihierarchical decision-making tree method.
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