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    25 March 1993, Volume 8 Issue 1 Previous Issue    Next Issue
    Special Column:Celebration of the 70th Anniversary of IGSNRR, CAS
    COMPUTER SIMULATION FOR THE MINERAL ELEMENT CYCLE IN THE RED SOIL HILL FOREST ECOSYSTEM
    Li Fei
    1993, 8 (1):  1-9.  doi: 10.11849/zrzyxb.1993.01.001
    Abstract ( )   PDF (512KB) ( )   Save
    On the basis of the small-plot experimental data of the years 1983-1986 at the Qianyanzhou Experimental Station of the Chinese Academy of Sciences at Taihe County of Jiangxi Province and using the compartment model with the help of computer, the cycles of P, K, Ca, Mg, Fe and Mu in areas where the vegetation is Pine (Pinus mossoniana), Chinese sweet gum (Liqui-dambar formosana) and natural secondary forests (control area.) respectively are successfully simulated.The simulation results quantitatively describe how these elements move and transfer along the food chain from the plant, animal, litter layer to the soil within 0-10 years. The paper also calculates their cycle coefficients and the balance points at the time when they reach a stable state.
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    THE REMOTE SENSING DYNAMIC MONITORING MODEL OF THE GRASS YIELD OF NATURAL GRASSLAND IN THE MIDDLE SECTION OF THE TIANSHAN NORTH SLOPE
    Huang Jingfeng, Shang Changqing, Feng Zhenwu
    1993, 8 (1):  10-17.  doi: 10.11849/zrzyxb.1993.01.002
    Abstract ( )   PDF (436KB) ( )   Save
    Using the grass yield and spectral data observed in the years 1989-1991 in different types of natural grassland in the middle section of the Tianshan North Slope and the synchronous NOAA/AVHRR data, the correlation coefficients between the grass yield and various vegetation indices are calculated. The results show that there exists an obvious correlation between the grass yield and various vegetation indices. The dynamic monitoring spectral model of the grass yield is established. The correlation coefficient between the dry weight of grass and the NOAA/AVHRR ratio vegetation index is 0.7597, and that between the green weight of grass and the NOAA/AVHRR ratio vegetation index is 0.8066. Then the satellite remote sensing monitoring model of grass yield is established. This model can be used to monitor the grass yield of natural grassland.
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    THE CHARACTERISTICS OF GRASS MOUNTAINS AND GRASS SLOPES AND THEIR EXPLOITATION AND UTILIZATION STRATEGY IN ZHEJIANG PROVINCE——A CASE STUDY IN CHANGSHAN COUNTY
    He Shaoji
    1993, 8 (1):  18-25.  doi: 10.11849/zrzyxb.1993.01.003
    Abstract ( )   PDF (546KB) ( )   Save
    The grass mountains and grass slopes widely distribute in Zhejiag Provnce are an important natural resource of agriculture. On the basis of the investigation and study of the grass mountains and grass slopes in Changshan County, this paper considers that not only their distributive area is extensive but also their types are various. The kinds of fodder grass suitable for pasture are abundant, but their nutrition content is rather low; the grass yield is great, but the palatable property is not so good; and the utilization period is very short. Besides, the gradient of the distributive area is steep and the soil erosion very serious. So, at the time when we exploit and use the grass mountains and grass slopes, we should carry out the principle of integrating exploitation with renovation and integrating utilization with protection and promore the good circulation of ecological-economic system. Then, it is possible to realize the simultaneous increase in ecological benifit, economic benifit and social benifit. For this purpose, three proposals are put forward in this paper.
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    THE RESOURCES OF DONGSHA, JIANGSU PROVINCE, AND THEIR DEVELOPMENTAL POTENTIAL
    Jiang Binxiag
    1993, 8 (1):  26-31.  doi: 10.11849/zrzyxb.1993.01.004
    Abstract ( )   PDF (417KB) ( )   Save
    Dongsha is the largest and highest of all the sand bars off the coast of Jiangsu Province but it is still underdeveloped. This paper, on the basis of actual investigations, the maps of the Yellow Sea, satellite photoes, and other available data concerned, analyses Dongsha's land and biological resources and the potential of its energy resources development. Moreover, this paper sets forth suggestions on how to properly develop Dongsha according to local conditions.
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    THE UTILIZATION AND PROTECTION OF THE NATURAL RESOURCES OF THE NORTHERN TIBET PLATEAU
    Li Mingsen
    1993, 8 (1):  32-37.  doi: 10.11849/zrzyxb.1993.01.005
    Abstract ( )   PDF (465KB) ( )   Save
    The Northern Tibet Plateau with an area of about 600,000 km2 and an altitude of more than 4500 m above sea level is the main part of the Qinghai-Tibet Plateau. It is not inhabited in most part due to cold and dryness. So its ecosystem consisting chiefly of the alpine steppe is well-preserved and also is the largest pasture land in Tibet Autonomous Region. The areas of various kinds of usable natural grassland are suitable for the carpet-wool producing Tibet sheep and they occupy 53% of the total area of the Northern Tibet Plateau. There are a lot of wild animals and many of them are either the national first- and second-rank protected animals or the economically valuable animals. Within the plateau there are numerous-lakes and their areas occupy more than 1/4 of total area of all the lakes in China. Owing to the rich salt mine (such as glauber's salt, soda, alkeline, boron, lithium, cesium, etc.) found in the chemical residues of many salt lakes, this plateau has become an important production area and future exploitation region of mineral salt in China.Because of the weak grassland ecosystem and unreasonable utilization, now 4% of the grasslands have deteriorated, the area of sand dunes has expanded and the inhabitable range of wild animals have gradually decreased. In addition, the environment of some production areas of salt mine has been polluted and the salt mine resources are seriously destroyed. So the important strategical measures for exploiting the biological and mineral resources of the Northern Tibet Plateau should be to moderate the use of the natural grasslands, to protect the wild animals, to comprehensively develop the salt lake resources.
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    ECONOMIC EVALUATION OF THE OPERATION OF EXPLOITING THE ZEOLITE ORE AND USING IT IN AGRICULTURE
    Hou Kui, Wang Xiulan
    1993, 8 (1):  38-45.  doi: 10.11849/zrzyxb.1993.01.006
    Abstract ( )   PDF (603KB) ( )   Save
    The zeolite ore resource is rich in China. This paper reports that if this resources is exploited and used in agriclture, the total yield of crops will increase by 40 billion kilograms. In addition to the benefit of saving fertilizer and fodder additive, the annual economic benefit will reach 49.625 billion yuan(renminbi). Thus, in view of improving the crop production of China, the exploitation of the zeolite ore and using it in agriculture have great striragic significance.
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    THE CLIMATO-ECOLOGICAL FUNDAMENTALS OF THE “MANMADE COMMUNITIES” OF TROPICAL PERENNIAL CROPS ON HAINAN ISLAND, CHINA
    MANFRED DOMRS
    1993, 8 (1):  46-62.  doi: 10.11849/zrzyxb.1993.01.007
    Abstract ( )   PDF (878KB) ( )   Save
    According to the leading national classification of the climate of China, given by B. Huang (revised version 1986), Hainan falls into the tropical climatic realm, subdivided into a "peripheral tropical" type for the northern part and a "middle tropical" type for the southern part of the island. While all-year-round frost-free conditions define the tropics in general, the 20t-isotherm for the coldest month represents the boundary between the peripheral tropical and middle tropical types. Compared to the tropical climate in general, Hainan experiences distinctly lower winter temperatures which thus result in a larger annual temperature variation. In terms of precipitation, Hainan records a long rainy season through the southwest monsoon and typhoon seasons from May until October while winter precipitation is comparably lower. Representing two agroclimatic hazards, strong typhoon winds and cold waves seriously affect Hainan. Although to be defined as "marginal tropica-1", the climatic conditions on Hainan are favourable for perennial tropical crops of which rubber and tea rank highest. Out of 92 state farms on Hainan, until the end of 1989 a total of 30 had been transformed from monocultivated rubber or tea plantations to rubber-cum-tea farms which are called in China "manmade communities". As shown for Nanhai State Farm on Hainan, a great economic am! social as well as ecological success could be achieved, only through intercropping of rubber anil tea. This underlines the large economic potential and agroclimatic capability of Hainan for tropical crops; it also proves the 'tropicality' of the climate on Hainan.The observations reported in this paper are part of a research project on the agroe-cological conditions in tropical China, carried out in close cooperation with the South China Academy of Tropical Crops, Danxian, Hainan, and the Chinese Academy of Sciences, Beijing.
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    A MULTI-PURPOSE MANAGEMENT MODEL AND THE FUZZYWEIGHT METHOD FOR GROUNDWATER RESOURCE SYSTEM IN JINAN CITY
    Xie Xinmin
    1993, 8 (1):  63-72.  doi: 10.11849/zrzyxb.1993.01.008
    Abstract ( )   PDF (567KB) ( )   Save
    According to the concrete task for the groundwater resource system in Jinan to manage and study the protection of springs and water supply, a multi-purpose management model for the groundwater resource system has been built up mathematically in this paper. Using the fuzzy mathematical theory, a fuzzy-weight method is proposed. It can solve the incomparabil-ity and the primary and secondary between various objectives at the same time. The theoretical analysis and a case study show that the multi-purpose management model and the fuzzy-weight method are rational and effective.
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    ON THE WATER RESOURCE OPTIMIZATION ALLOCATION IN THE REGION ALONG THE TARIM RIVER IN XINJIANG IN THE YEAR 2000
    Liu Shaomin, Feng Xiuzao
    1993, 8 (1):  73-86.  doi: 10.11849/zrzyxb.1993.01.009
    Abstract ( )   PDF (800KB) ( )   Save
    In this paper, first of all, an integrative benefit assessment model of water resources utilization for the water in the upper, middle and lower reach of the Tarim river is set up and the priority order of each water user is determined. On this basis, by using the method of decomposition and coordination, a two-layer model of water resources optimization allocation with the purpose of achieving the best integrative benefit is set up, and the water resource optimization allocation schemes of the Tarim river for different year patterns in the year 2000 are calculated. The results are comparatively good. This is helpful to scientific management of the water resoures exploitation and utilization in this region in the future.
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    AN APPROACH TO THE CURRENT SITUATION AND DEVELOPMENT TREND OF LAND RESOURCE SCIENCE
    Chen Baiming
    1993, 8 (1):  87-94.  doi: 10.11849/zrzyxb.1993.01.010
    Abstract ( )   PDF (585KB) ( )   Save
    This paper analyses and expounds the current situation and development trend of the land resource science. The discussion is based on the research background at home and abroad, the theoretical base of the subject, the research content, research methodology and form of expression, and development prospects and applied objectives. Thus, the author holds that the land resource science has preliminarily been formed as an independent subject and from now on we should continuously perfect its theory and enrich its practice.
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