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Table of Content

    25 September 1992, Volume 7 Issue 3 Previous Issue    Next Issue
    Special Column:Celebration of the 70th Anniversary of IGSNRR, CAS
    ON SOME PROBLEMS ABOUT NATURAL RESOURCES
    Li Jinchang
    1992, 7 (3):  193-207.  doi: 10.11849/zrzyxb.1992.03.001
    Abstract ( )   PDF (1145KB) ( )   Save
    In this paper the author's main argument is that the natural resources are endowed with value. To establish this conception is a basic countermeasure for solving the problems of resources and ecological environment. The natural resources are the material base of economic and social development, and therefore they are also assets. We should set up a resource assets out-loog, establish regulations of assets management, strengthen the property right management, seperate the right of ownership from the utilizat on right, and put into effect a pay system of resource utili?ation and resource transfer. The industialization of natural resources should be carried out in the course of the natural resources reproduction. The accounting of natural resources should be made and it should be incorporated in the accounting system of the national econo-ym. These are some basic problems in the protection, exploitation, and utilization of natural resources and are also the problems that should be considered and emphasized in the regulariza-tions and legalization of the assets management of natural resources.
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    THE WOODY NITROGEN FIXATION RESOURCE AND ITS EXPLOITIVE AVENUES IN THE SICHUAN RED BASIN
    Deng Tingxiu Liu Guofan
    1992, 7 (3):  208-216.  doi: 10.11849/zrzyxb.1992.03.002
    Abstract ( )   PDF (615KB) ( )   Save
    The resource of 41 local N-fixing woody plants is reported in this paper. Among them 10 species belong to those newly recorded. Some of them are characteristic species of our country and some are rare or nearly extinguished ones. According to a preliminary investigation, at least 25 species have nitrogen-fixing function and good cultural prospects in the region. The characteristics and ecological properties of nodulation and nitrogen fixation of the woody plants are studied. The difference in nodulation and N-fixing ability of each species and the relativity of the ability under different soil conditions are demonstrated. The experience in exploiting the nitrogen fixation resource effectively is summarized. The main avenues of exploitation of the resource include the following: (1) It can be used as member of mixed plantation; (2) It is a pioneer plant for reclaiming wasteland; (3) It should be rationally arranged in an agriculture-forest combination system and in a protection forest; and (4) It has used in economic forest. Exploitation of this resource is significant to establishing a forest nitrogen fixation system, improving soil fertility, and increasing forest productivity.
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    A STUDY ON THE WATER CONSERVATION FUNCTION OF THE NATURAL FOREST OF GE'S EVERGREEN CHINQUAPIN
    Yang Yusheng, Chou Shuangqian, Li Aiqin, Li Zhenwen
    1992, 7 (3):  217-223.  doi: 10.11849/zrzyxb.1992.03.003
    Abstract ( )   PDF (444KB) ( )   Save
    Studies of the forest canopy, the vegetation stratum under canopy, the forest floor and the differences in water-holding capacity of soil horizon (0-40cm) and in soil permeability are made for the Ge's evergreen-chinquapin natural stands and plantations in Sanming, Xinke. The results show that the total water-holding capacitf of the Ge's evergreen chinquapin natural stands has increased by 225.131 t/ha as compared with its plantations and by 296.558 t/ha as compared with the Nanmu plantations, and that the steady infiltration value of the soil amounts to 8.09 mm/min, which is 3.3 times as much as that of the Ge's evergreen chinquapin plantations and 25.3 times as much as that of the Nanmu plantations. It is obvious that the Ge's evergreen-chinquapin natural stands have a splendid water conservation function.
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    A STUDY ON CLIMATIC ADAPTABILITY OF THE HIGH- QUALITY HERBAGE INTRODUCED IN SOUTH CHINA
    Pang Tingyi, Bin Shiyi, Chen Jiawu, Wu Junming, Ding Xiaohong
    1992, 7 (3):  224-234.  doi: 10.11849/zrzyxb.1992.03.004
    Abstract ( )   PDF (715KB) ( )   Save
    The two-year periodic experiments of three kinds of tropical herbage and three kinds of temperate herbage with good prospects in South China are summarized in this article. The study indicates that there is close relation between the growth and output of the herbage and the meteorological conditions. Meanwhile, it also identifies the meteorological indexes for the tropical herbage to survive winter and for the temperate herbage to survive summer. The frost injury index and advection cold injury index of tropical herbage and the hot injury index of temperate herbage are found. In addition, the climatic adaptability of the introduced high-quality tropical herbage and temperate herbage in South China are appraised and the problem of rational layout is also explored. The view-point of the authors is that the artificial pasture in South China should belong mainly to the middle and small types and that agriculture, forestry, and animal husbandry should join together.
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    ON THE NATURAL SUPERIORITY AND EXPLOITATION OF THE TROPICAL LEVEL LAND OF THE YUANJIANG RIVER VALLEY OF YUNNAN PROVINCE
    Yu Zhanren
    1992, 7 (3):  235-239.  doi: 10.11849/zrzyxb.1992.03.005
    Abstract ( )   PDF (364KB) ( )   Save
    The Yuanjiang River valley is one of the dry-and-hot valleys in the Hengduan mountains of Yunnan province. In comparision with other river valleys of this province the outstanding characteristics of it is both hot and dry, belonging to the semi-arid climate type, and accordingly it is endowed with profuse heat resource but with low precipitation.Here the climatic conditions are not suitable for growing such tropical plants as rubber tree, coffee, coco, and the like, but are good for the excellent species of the lac insect-Kerria sindica. The Yuanjiang valley has proved to be an ideal district for cultivation of this species of lac insect and has manifested its natural superiority in this respect.As for the exploitation of the valley, it is suggested that taking an eco-forestry way to set up plantation forest of the best of the superior lac insect host tree (Ziziphus mauritiana) as an artificial ecosystem would be more profitable.
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    THE RESOURCES DISTRIBUTION AND SEDIMENTOLOGICAL CHARACTERISTICS OF PLACER GOLD IN THE JOINT AREA OF JIANGXI, FUJIAN AND ZHEJIANG PROVINCES
    Zhu Haihong Zhang Liren
    1992, 7 (3):  240-248.  doi: 10.11849/zrzyxb.1992.03.006
    Abstract ( )   PDF (607KB) ( )   Save
    The enrichment conditions and depositional characteristics of placer gold in the joint area of Jiangxi, Fujian and Zhejiang Provinces are dealt with as follows:1.In this areas, there is a high concentration of placer gold in the drainages of the Lean-jiang and Chanjiang Rivers, which are located in Northeast Jiangxi Province, and the placer gold distributes almost in the whole region of the main river systems. The material sources derive mainlf from the metamorphic rock of m ddle proterozoic era. This stratum is rich in gold and covers 63% of the area, providing a good material condition.2.The distribution of the stratum of Green Stone is so wide that many mineral deposits and enrichment spots of placer gold are found and the gold-bearing layers are thick. The gold-bearing depositional areas are essentially in the valleys of the main rivers and their large tribu-taries.3.According to the heavy sand analysis, the enrichment of placer gold has close relation with its transport distance. In general, the anomaly area of gold-bearing sand is found not more than 10-20 km apart from the source, and the gold content gradually decreases with the tran-spor distance due to the effects of mechanical attrition and water sorting along the way.4.In the mineralization environment the variation in river dynamics is the main factor of gold enrichment. In the transitional section between the upper reaches and middle reaches of the river, the formation of various sedimentary bodies in the channel is due to sudden decrease in longitudinal river gradient, widening of river valley, abrupt reduction of current speed, and meander migration. These bodies have thicker gold-bearing materials, coarser gold grain size, and higher gold content.5.Microtopography plays a significant role in placer gold enrichment. The placer gold has a high content in ancient buried channel, grooves of selective erosion of the bedrock, and various corrosion depressions in the karst basin. The fill depth of placer gold in weathered cracks of the bedrock generally reaches 30 to 50cm.
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    THE CHARACTERISTICS OF RARE-ALKALI METAL OF THE TIBETAN GEOTHERMAL SYSTEM AND THE POTENTIAL OF ITS EXPLOITATION AND UTILIZATION
    Zheng Yaxin, Zhang Mingtao, Zhu Bingqiu, Zhu Lixin
    1992, 7 (3):  249-257.  doi: 10.11849/zrzyxb.1992.03.007
    Abstract ( )   PDF (623KB) ( )   Save
    The world's highest values of geothermal fluid rare-alkali metal contents discovered in Tibetan geothermal systems and the rare-alkali metal determination of the Yangbajing geothermal field, the largest hydrothermal system in the Himalayan geothermal belt, offer convincing geo-chemical evidence for the study of the mechanism of the specific heat origins of the Himalayan geothermal belt located on the sole global continental crust convergence zone with the greatest crust thickness. The reclaim of the rare-alkali metal from the thermal discharge of the Yangbajing power plant also creates unique opportunities and options for the comprehensive utilization of geothermal fluids, the elimination of environmental pollution, and the enhancement of economic benefits.
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    STRATEGIC SIGNIFICANCE TO THE DEVELOPMENT AND ESTABLISHMENT OF THE SOUTHWESTERN ENERGY BASE IN CHINA
    Hou Kui, Cheng Wanyong
    1992, 7 (3):  258-266.  doi: 10.11849/zrzyxb.1992.03.008
    Abstract ( )   PDF (646KB) ( )   Save
    It plays a very important role in the development and distribution of Chinese energy industry to exploit and establish the south-western energy base. In southwestern China, the coal resource distributes concentrically in the areas where Sichuan, Yunnan and Guizhou provinces join and its reserve is about 8.9% of the national total; the hydropower deposit occupies 42% of the national total (if including Tibet, it will reach 70%) and its workable reserve is 51% of the national total. At present the annual electric energy generated here occupies 54% of the national total.The coal industry in China has made a great progress. Up to now, several coal bases have been founded. They include the Shaanxi, Lupanshui and Lianghuai bases and so on. The oilgas industry is developing rapidly and the nuclear electric industry has made a start. But the utilization of the hydropower resource is still backward. The utilization rate of the hydropower resource is 4-5% in China and it is only 1.3% in the southwestern region. Thus it has very important strategic significance to develop the hydropower and coal resources in this region to cure the short supply of energy in China.
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    THE SIGNIFICANCE OF THE EXPLOITATION OF THE BRACKISH WATER RESOURCE IN THE PLAIN OF WEST SHANDONG PROVINCE
    Song Yinsheng
    1992, 7 (3):  267-272.  doi: 10.11849/zrzyxb.1992.03.009
    Abstract ( )   PDF (392KB) ( )   Save
    The plain of west Shandong province is located at the end of the Yellow River flood-plain. It often suffers from multiple disasters of drought, waterlogging and salt or alkali This paper analyses the formation, quality and dynamic features of the shallow brackish wa ter. The quality and quantity of water are evaluated. The probability of exploiting, the brackish water and the irrigation benefit are disscussed. There is no doubt that exploiting the shallow brackish water in agriculture will be of gre at significance to expanding the ground water resource and promoting the well circulation of water and soil environments in the Plain.
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    THE INFLUENCE OF HUMAN ACTIVITIES ON THE ECOLOGICAL ENVIRONMENT AND PRESENT CLIMATIC CHANGE OF THE LOESS PLATEAU
    Wang Ling, Wang Qinxue, Zhang Ruyi
    1992, 7 (3):  273-281.  doi: 10.11849/zrzyxb.1992.03.010
    Abstract ( )   PDF (568KB) ( )   Save
    The influence of human activities on environment and climate is the most conspicuous problem of the Loess Plateau, and it may be divided into two aspects:First, the excessive utilization of land by human race causes the destruction of vegetation, and consequently large expance of land is under desertification and the characteristics of the ground surface and the water and heat excha'nge on the ground surface are changed.Second, the use of coal by industries produces a huge amount of carfoondioxde and trace elements, which enter into the atomosphere and cause air pollution.Data of 1951-1990 are collected from 69 meteorological stations on the Loess Plateau. After analysis, the decadal variaions of temperature and rainfall in the last 40 years are obtained.1.In the arid zone of the northwestern of the Loess Plateau, the increase in temperature is the largest. For the past 40 years, the annual mean temperature has increased 0.7-10℃. In the semiarid zone of the middle part of the Plateau, the annual mean temperature increases 0.1-0.5℃, while in the subhumid zone of the southern part, the temperature remains almost constant and even has a slight decrease.2.For the past 40 years, the large and middle-sized cities have the largest temperature increase, especially the industrial cities of the modern type.3.For the past 40 years, the rainfall has decreased in the most part of the Loess Plateau.
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    THE WILD ECONOMIC PLANT RESOURCES IN THE NATURAL RESERVE REGION OF THE WUYI MOUNTAINS, FUJIAN PROVINCE
    Lin Chengchao Lin Guoyu
    1992, 7 (3):  282-287.  doi: 10.11849/zrzyxb.1992.03.011
    Abstract ( )   PDF (391KB) ( )   Save
    On the basis of many years of investigations and researches, the authors have found that the vascular plants in the natural reserve region of the Wuyi Mountains amount to 2025 species with 80 subspecies or varieties. They belong to 851 genera and 194 families. After a detailed study of the flora composition of every genus, according to the use of the wild economic plants, the authors divide them into 8 types: fat plant, strach and sugar plant, fragrant plant, fibre plant, tanning plant, ornament plant, medicinal plant, and honey plant. This article deals with the main kinds of wild economic plant of each type in order to provide the readers with basic research data and scientific evidences for further study as well as for the rational utilization and conservation of the plant resources of the natural reserve region.
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