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  • 1986 Volume 6 Issue 3
    Published: 30 July 1986
      
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  • A STUDY ON THE NORTH BOUNDARY OF THE SOUTH SUBTROPICAL ZONE IN MID GUANGDONG
    TAN Weirui, ZHANG Shenglin
    1986, 6(3): 193-200.
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    Delimitation of climatic zones is of significance both theoretically and practically. On the north boundary of the south subtropical zone in mid Guangdong there exists much controversy. Many geographers and climatologists believe that the boundary should be in accord with the first or, especially, the second mountain arc in mid-north Guangdong.
  • THE RELATIONSHIP BETWEEM THE FLUCTUATION OF LATE RICE YIELD AND COLD DAMAGE IN MILKY MATURRITY IN GUANGDONG
    TU Yuexian
    1986, 6(3): 201-213.
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    In this paper, the relationship between the fluctuation of late rice yield and cold damage in Guangdong Province is principally studied. The analytic results show that since the 1970's, around the interior and middle area of Guangdong Province, the primary factor affecting the late rice yield is the cold damage during milky maturrity stage. If climatic reasons could also account for the trend towards early sow the late rice in aforementioned area, all late rice varieties, regardless of their ripening time, should have their earhead-evenness before the end of safe ear sprouting period; otherwise, arbitrary delay in late rice sowing will have little hope of success.
  • INITIAL STUDY ON THE BELONGING OF A BASIC ECONOMIC REGION OF HUNAN PROVINCE
    WANG Xinjian
    1986, 6(3): 214-221.
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    The division of basic economic region is based on the theory of tributary area. It expounds that a modern city has the attractable area corresponding to its economic status. A basic economic region may covers several provinces of different development and various natural condition. This article deals with classification of Hunan province on planning new ecoaomic region. My study shows that it is proper to combine Hunan and Guangdong into a basic economic region. It is common knowledge that Hunan is the hinterland for Guangzhou's economirc expansion, while Guangzhou is the important port for Hunan's foreign trade. The wide economic connections between Hunan and Guangdong continued for hundreds of year, thence, interaction has new momentum also.For bring reformation of South China's basic economic region into correspondence. with economic reform, there are three plans may be selected.1. Guangdong, Hunan, Jiangxi, Fujian. 2. Guangdong, Hunan, Guizhou, Guangxi and 3. Guangdong, Hunan. Fujian. Base on aforementioned analysis, the author proposes that the last is preferable.
  • THE STRUCTURE OF TOURISM RESOURCE AND ITS DEVELOPMENT IN LUFENG COUNTY, GUANGDONG PROVINCE
    CHEN Chuankang, XU Junliang
    1986, 6(3): 222-231.
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    From field investigation, the authors have found that the coastal area from Xuanwushan Mountain to Jinxiangtan Beach in Lufeng County, Guangdong Province, is an ideal place for tourism. Its beautiful landscape is composed of "divinity" (the temples), "sea" (facing the South China Sea), "sand" (the sand beach) and "rock" (the shaped iandform). The large temples, the scenic sea beach with odd boulders and fine sand, and the historic relics and revolution memorial spots constitute three levels of the tourism resource structure, corresponding to which are the three levels of the tourism behaviour structure, namely, the pilgrimage tourism, the sightseeing and entertainment tourism, and the cultural tourism. The attractive tourism market of Xuanwu Mshanonthain-Jinxiangtan Beach region has similar structure levels, and so the service facilities, suc asu those of traffic, accommodation, shopping, etc.Based on the analysis of aforementioned structure systems, the authors offer proposals for the tourism development and environment protection in the region, and estimate tie promotion effects of tourism on the development of the port construction, the aquatic production, and the secondarv and tertiary industries.
  • STUDY ON LAND TYPES OF KUNMING BASIN
    QIN Qiming
    1986, 6(3): 232-241.
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    In this paper, taking the region close by Cheng-gong County as example, the land types of Kunming Basin are discussed as follows: 1. The land types in this region are mainly determined by mesolandforms, lithological characters, soil and human impact on physical environment. 2. A hierarchical scheme for land types classification in this region is introduced. There are 4 first level (middle-scale) land types and 34 second level (small-scale) land types, which are, identified by homogeneous charactristics. Four first level land types are: lemnetic-alluvial flat, red earth hilly plateau, red soil hill, brown soil mountain. 3. Four patterns of structure of land types, namely "stratiform", "semi-ring", "symmetrical-mosaic", "reunion", are illustrated in detail. 4. In addition, features and comprehensive evaluation of various land types are discussed. Noticed that the evolution of land types being good tedency or bad tendency is in reguital for human impact, the rational utilization trend of each land type is pointed out.
  • THE RELATIONSHIP BETWEEN THE MINERALS’ SURFACE CHARACTERS OF THE SEDIMENTS AND THE SEDIMENTARY ENVIRONMENT IN THE ESTUARY OF PEARL RIVER
    ZHU Sulin, LIANG Baihe, WU Huaxin
    1986, 6(3): 242-246.
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    The surface texture of clastic grains is one of the important marks to judge the an dent sedimentary environment. Based on the grain analysis and heavy minerals identifi- cation of the surface sediments along coastal zone in the Pearl River's estuary, four minerals (quartz, feldspar, zircon and tourmaline), which substituted for the typical clastic grains locating in the different zone, were scanned with electron microscope. The laboratorial observation shows that these four minerals have varient deformation traces relating to different energy condition and its action way. For example, the shap-V scratches on the surface of the quartz grains in sand bank, the various shape of the ramming pore and corroded hole on the surface of the feldspar grains, the honeycomb shape figures of chemical corrosion and stripping on the surface of quartz grains above the tidal zone, the most rounded contour of the quartz, zircon, tourmaline grains both in the tidal zone and under the tidal zone, may be considered as the modern marks to study facies zones corresponding different environment. Meanwhile, the same minerals under different envionment have some resemble surface texture characters. Above mentioned fact results from the minerals crystal texture and heir physical and chemical characters. As an external cause, the influence of "energ condition acts" positive role too.
  • MORE ON THE FORMATION OF “OLD RED SAND” AND ITS GEOLOGIC-GEOGRAPHIC SIGNIFICANCE
    CHEN Weiguang, ZHANG Hunan
    1986, 6(3): 247-255.
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    According to the previous study and new data obtained from the grain size analysis, the electronic microscopic sketch of quarts sand and other experiment methods, the authors offer the further discussion about the age of "Old red sand" and its sedimentary environment. The "Old red sand" was classified to marine deposits. Based on the c14 age of mud in the synchronous deposits and the age of the marine teraces composed of the "Old red sand", which distributed along the coastal area of South China, the authors believe that.the "Old red sand", formed in the period from the preliminary age of Epipleistocene to late Epipleistocene. During this long period, the sedimentary process of "Old red sand" under went some undulations of climate and vibration of sea level caused by interglacial (ingression)-late glacial age (regression)-subinterglacial (ingression). The "Old red sand" was formed thicker red mantle rock by violent weathering as it lifted up from water surface. Both the sedimentary sequence and the depositional cycle features reflected that, the succession of strata of "Old red sand" can be divided into two parts, the lower formed in the first period of Epipleistocene, the period of ingression in the interglacial stage; while the upper part formed in the late Epipleistocene, the period of ingression in the subinterglacial stage, an interval between the Dali glacial period.The "Old red sand" is the typical littoral facies stratum of Epipleistocene along coastal areas of South China because of fine development and wide distribution and stable position. It's development and evolution may be represented similarly the palaeo-geograhic condition of South China coastal area undergoing elevation and subsidence.
  • ON THE ORIGIN OF SANDY LAND IN WEST PART OF HAINAN ISLAND
    LIU Ruihua, ZHANG Zongying, HAN Zhongyuan
    1986, 6(3): 256-263.
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    The sandy land in west part offHainan island consists of sand bed and gravel bed of Beihai formation, as well as sand bed of Basuo formation. All data, obtained from gravel measure, size analysis, mineral analysis, spore-pollen analysis, may be used as evidences for illustrating the alluvial-diluvial origin of Beihai formation. However, the Basuo formation is an alluvial deposit, which formed from transported and redeposited material of Beihai formation.
  • EFFECTS OF DEFORESTATION ON HYDROLOGICAL ELEMENTS OF THE RIVER ON HAINAN ISLAND
    GAO Haifeng
    1986, 6(3): 264-272.
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    By utilizing the modulus departure method and double-mass curves method, the interannual variation (1960-1980) of relationships between annual rainfall and other parameters (runoff maximum dicharge, minimum discharge, erosion modulus and maximum daily mean silt discharge) are analysed for nine basins on Nandu River, Wanquan River and Changhua River,Haninan Island in this paper. It may be concluded as follows: (1) During the periods of normal annual rainfall, considerable deforestation affects obviously on hydrological elements and the yield rates of annual runoff erosion, silt discharge and maximum discharge swell all-sidedly with a decrease in yield rate of minimum discharge. (2) In those year, the deforestation for planting over vast areas is set in, the distinct affection of deforestation was observed. Otherwise, the hydrological situation is evidently improved in the year after those year deforesting since the scrub grows rapidly. (3) The effects of deforestation are weakened by both engineerings and anomalous precipitation conditions.
  • THE PRODUCTION OF COFFEE IiV THE VIIORLD
    WANG Jianmin
    1986, 6(3): 273-284.
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    Coffee is one of the three greatest beverage crops in the world. It is distributed mainly over the tropical and subtropical areas of 28°N to 38°S. At present, coffee producing regions have exceeded 10 million hectare and its total output is over S million tons. In 1983, the total export guantity was 405100 tons and worth $9.6 billion. Its import quantity was 3968000 tons and worth over $10 billion. The greatest coffee producing country is Brazil, its output and export rank first in the world. Latin American, the greatest coffee producing region and its production accounts for 2/3 of the output in the world. After 2rd war, the range of the coffee production and consumption are becoming Increasingly extension. The industry of solubility coffee processing is spring up vigotously. Each coffee producing country devotes oneself to culture fine varieties and to advance cultivation technique. They wage positively a compaign about comprehensive utilization of coffee.