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    Special Column:Celebration of the 70th Anniversary of IGSNRR, CAS
  • Special Column:Celebration of the 70th Anniversary of IGSNRR, CAS
    AN OUTLINE OF THE RESEARTH METHOD OF THE PROJECT "THE PRODUCTIVITY AND POPULATION CARRYING CAPACITY OF THE LAND RESOURCE IN CHINA"
    Chen Baiming
    1991, 6(3): 197-205. https://doi.org/10.11849/zrzyxb.1991.03.001
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    The question that whether the land resource can produce enough food to support the future population has received increasing concern in recent years. As an answer to this question, the study of the carrying capacity of the land resource occurs accordingly. The Commission for Integrated Survey of Natural Resources, Chinese Academy of Sciences, received the entrustment from the National Commission for Agricultural Regionalization and sponsar-ed the project "The Productivity and Population Carrying Capacity of the Land Resource in China".The study contant of the project is divided into five levels. The years of 2000 and 2025 are taken as the time scale of the study. The study is based on the 9 land potential regions demarcated on the 1:1000000 land resource map of China, is guided by the scientific theories of resources, resource ecology and resource ec onomy, and has the characteristics of compra-hensiveness, coordination and continuitv. Proceeding from the interalations of PRED (Population Resource, Environment, and Development), it makes efforts to clarify the following points: (1) The population number the can be supported in different periods by the land resource of China (2) The possibility to raise the carrying capacity of the land resource, and (3) the ways needed to attain this goal.
  • Special Column:Celebration of the 70th Anniversary of IGSNRR, CAS
    STUDY ON VALUABLE PLANT RESOURCE ORYCHOPHRA-GMUS VIOLACEUS (L.) O. E. SCHULZ
    Luo Peng, Lan Zequ, Huang Jan and Li Zeyong
    1991, 6(3): 206-210. https://doi.org/10.11849/zrzyxb.1991.03.002
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    Orychophragmus violaceus is a valuable plant resource, found by the Laboratory of Plant Genetics of Sichuan University. It is superior for its high oil quality. Its oil contains higher percentage of oleic (20.32%) and linoleic (53.17%) acids, and lower percentage of inolenic (4.76%) and erucic (0.94%) acids. This plant resource may be very much useful in rapeseed breeding.
  • Special Column:Celebration of the 70th Anniversary of IGSNRR, CAS
    AN ANALYSIS TO THE CLIMATIC CONDITION FOR THE QUALITY OF RICE IN THE QINLING-HUAIHE REGION
    Zhang Songwu
    1991, 6(3): 211-219. https://doi.org/10.11849/zrzyxb.1991.03.003
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    The Qinling-huanhe Region is a transional belt in China where the typical subtropical zone changes gradually toward the warm temperate zone. There are various climatic types here. Correspondingly, the quality of rice also varies obviously with time and space and shows certain regularities. A revelation of these regularities will be helpful to causing the climate resource to transform toward the type which makes the rice quality good.
  • Special Column:Celebration of the 70th Anniversary of IGSNRR, CAS
    A STUDY OF THE LIGHT ENERGY RESOURCE UTILIZATION RATE OF THE TROPICAL AGRICULTURE IN HAINAN ISLAND
    Zhou Zhaode
    1991, 6(3): 220-225. https://doi.org/10.11849/zrzyxb.1991.03.004
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    Through the physiological function of energy transformation of green plant, i.e., the internal relation of influx, transformation and output of solar energy in photosynthesis, this paper describes quantitatively for every locality of Hainan Island the actual light energy utilization rate (ALEUR), the potential light energy utilization rate(PLEUR), the absolute difference of the two parties(DTP), and the regional agricultural production potential (APP). The results indicate that the ALEUR of the island is lower than the averge level of the whole nation, being only a half of that of regions of two crops a year. For the high value regions in ihe island the ALEUR is close to that of regions of one crop a year.The difference of the PLEUR between Hainan Island and other tropical regions of the world is not great. The average DTP in the island reaches 5.1%, and therefore, the production potential here is relatively high.According to actual conditions, this paper also probes into the main causes of the low level of the LERUR in the island and fhe corresponding ways to increase it. It is expected that this will provide a guide or some reference for the agricultural production in Hainan Island.
  • Special Column:Celebration of the 70th Anniversary of IGSNRR, CAS
    A STUDY ON RATIONAL DEVELOPMENT OF NATURAL RESOURCES IN THE ARID AREA OF NORTHERN CHINA
    Shen Yuancun
    1991, 6(3): 226-233. https://doi.org/10.11849/zrzyxb.1991.03.005
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    The northern arid land of China is economically backward and ecologically fragile. However, it has a rich storage of variety of resource such as energy, mineral grassland and arable land. This paper, based on the analysis of resources advantages and economic disadvantages of the area, proposes the resources-economy coordinating policy of local development. Eight su-bregions are divided according to resources-economic combining characters, and counter-measures pointed out to accelerate economic development, induding railway network cons ruc-tion, opening policy, money collection, and so on-
  • Special Column:Celebration of the 70th Anniversary of IGSNRR, CAS
    NEWLY SURVEYED DATA ON COASTAL ZONE RESOURCES OF EAST LIAONING PROVINCE AND THEIR SIGNIFICANCE
    Li Guangtian
    1991, 6(3): 234-243. https://doi.org/10.11849/zrzyxb.1991.03.006
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    Based on the Newly surveyed data, the fundamental status of the muddy coast in East Liao-ning Province is described. Then the characteristics of the resources including tidal oragnisms, land, reeds and tidal energy and their developing potentiality are discussed. Lastly, a model of artificial ecosystem is set forth on the theoretical basis of the transversal zonation of the tidal flat.
  • Special Column:Celebration of the 70th Anniversary of IGSNRR, CAS
    THE SEABEACH RESOURCES OF YANCHENG CITY, JIANG- SU PROVINCE, AND THEIR EXPLOITATION AND UTILIZATION
    Jiang Binxing
    1991, 6(3): 244-252. https://doi.org/10.11849/zrzyxb.1991.03.007
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    To exploit and utilize the seabeach resources comprehensively is one of the important ton-tents in the territorial exploitation and management of China and a strategically major point in speeding the development of the economy of coastal areas. Based on the on-the-spot investigation and documentary materials, the article will discuss the general situation and resources superiority of the seabeach of Yancheng city, and put forth some suggestions on how to exploit and utilize its resources and how to establish the corresponding commodity production and a foreign exchange earning base.
  • Special Column:Celebration of the 70th Anniversary of IGSNRR, CAS
    A STUDY OF THE EXPLOITATION AND UTILIZATION OF THE DEPOSIT-ENLARGEMENT TYPE SEABEACH BASED ON THE HISTORY OF ECOLOGICAL SUCCESSION IN DAFENG COUNTY, JIANGSU PROVINCE
    Jia Jinye, Zhou Yinxi, Li Naishuan
    1991, 6(3): 253-261. https://doi.org/10.11849/zrzyxb.1991.03.008
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    The process of ecological succession in Dafeng County is the process of natural succession of 3 typical deposit-enlargement type seabeach. The intervention of man s activies greatly accelerates the process of this succession. The construction of water conservancy which is centered on the desalination and improvement of the soil and a series of capital construction of the farmland are efficient measures to accelerate the succession from a natural ecological system to a good man-made ecological system. The inter grated development of farming, forestery, animal husbandy and fishery on this basis is the foundation for developing the economy. When developing the processing industry of the products of local farming, forestery, animal husbandy and fishery, attention should be paid to other superior industries. This will promote the stability, harmony and flourish of this system. It will promote the all-round development of the social ecomony and the natural environment to attach importance to the causes of education and science and techonology in the newly reclaimed area. The salt industry on such seabeach not only is unfavourable to itself but also hinders the succession of this system.
  • Special Column:Celebration of the 70th Anniversary of IGSNRR, CAS
    EVALUATION OF THE IMPACT OF THE THREE-GORGE PROJECT ON AVIAN RESOURCES IN THE RESERVOIR AREA
    Zhang Jiaju, Xiong Tieyi, Luo Jia, Luo Mingshu, Wu Dajun
    1991, 6(3): 262-273. https://doi.org/10.11849/zrzyxb.1991.03.009
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    From 1984 to 1986, based on the knowledge of the present condition and characteristics of avian resources in the Three-Gorge Reservoir area, we investigated the change of the avian distribution and community composition in other areas where dams had been built. After studying and analysing quantiatively every factor of the impact of the Three-Gorge Project on the avian community and species by means of biometrics, we give a quantitative and qualitative evaluation.The results indicate that the construction of the Three-Gorge Reservoir will change the avian community composition and bird species distribution in this region. On one hand, the numbers of rare and economic birds, especially the forest birds, which have already become scare in the past ten years, will decrease seriously. On the other hand, the numbers of water birds will increase. In a word, in building the dam, the disadvantages derived from it far outweigh the advantages it brings about.The impacts af a higher dam (180m) and a lower one (150m) on avian community are different. The impact value of a higher dam to the forest and field birds is 30 per cent larger than that of a lower dam, and the impact value of a higher dam to the acuatic birds is two times that of a lower dam.
  • Special Column:Celebration of the 70th Anniversary of IGSNRR, CAS
    A STUDY ON THE METHOD OF APPLYING LANDSAT-5 TM IMAGE IN COMPILING THE SOIL MAP( 1:100000) OF NORTHERN FUJIAN
    Zeng Kaiquan
    1991, 6(3): 274-285. https://doi.org/10.11849/zrzyxb.1991.03.010
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    The main points of soil mapping method discussed in this paper are as follws: 1. The visual intepretation is made by using the standard false color and analogous natural color pi--ctures composed from TM original images and the reflective spectral data of ground objects are consulted to analyse the characteristic of their image tone; 2. The spectral characteristic of ground objects is found out through contrast interpretation of the black and white TM images of the seven bands and the effect of color composite is predicted; 3. The information of ground thermal field and soil vertical zonality which differ with elevation is extracted by using the TM6 thermal infrared image to make the pseudo-color-equidensity slicing; 4. The information of soil and land utilization is enhanced by using TM ratio images and their false color composition; and 5. The related data, such as topographical maps and geological maps, are consulted to draw the soil map. Experience has proved that the precision of the soil map on the middle scale drawn by this method is up to the standard requivement, the boundaries of some soil categories interpreted and delineated by the method are more objective and precise, and the amount of mapping work is greatly reduced.
  • Special Column:Celebration of the 70th Anniversary of IGSNRR, CAS
    AN APPROACH TO THE DIVIDING OF PRINCIPAL SUITABILITY IN THE EVALUATION OF LAND SUITABILITY
    Yang Zisheng
    1991, 6(3): 286-292. https://doi.org/10.11849/zrzyxb.1991.03.011
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    In the evaluation of land suitability, dividing the principal suitability of the two-sided suitability or many-sided suitability land is very neccessary. In this paper, the principles, indices and method for dividing the principal suitability of land are discussed and a comprehensive and quantitative index——the concept of economic-social suitability index of landwhich is used for analysing the principal suitability of land is propounded. In the end, 'he Huadian Plain of the Diancang Mountains is taken as an example and its principal suitabi'ity of land is analysed. It has been found that the Plain is suitable for growing the cool-loving crops which ripen once a year.