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  • 1985 Volume 5 Issue 3
    Published: 20 May 1985
      
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  • THEORIES AND METHODS OF TERRITORY PLANNING
    Wei Xinzhen
    1985, 5(3): 193-200. https://doi.org/10.13249/j.cnki.sgs.1985.03.193
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    Territory planning is a newly emerging thing in the planning field of our country.This paper deals with following problems on theories and methods of territory planning. 1.First of all,territory planning should correctly determine a system of combining economical development with social development. 2.According to the condition of China,key developing area should be the mid-one in which energy is located and metal mineral resources are rich. 3.At the same time of doing the first item,we should propose correspondingly the different developing ways of costal areas and interior areas. 4.The core of territory planning is to transform continuously economic structure and resolve the problem of rationally locating productivity through developing nature resources. 5.Micro-countermeasure of territory planning means that of rational location of concrete productivity and so on.And macro-countermeasure is an overall one which has a notable impact on territory planning,
  • AN ANALYSIS ON THE CHARACTERISTICS OF ACCUMULATED TEMPERATURE VARIATON IN CHINA
    Wang Futang, Wang Shili
    1985, 5(3): 201-208. https://doi.org/10.13249/j.cnki.sgs.1985.03.201
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    Accumulated temperature above 10℃ is one of the important indices of thermal condition.The research on characteristics of accumulated temperature variation in time and space scope and their effects on agricultural production has become more important with the appearance of abnormal climate and the requirement in agricultural production.Through analysing some characteristics of accumulated temperature(above 10℃) variation in China,it is found that in the recent century there are three phases in variation of accumulated temperature in China:cold,warm and cold.They are reversed in 1930’s and 1950’s respectively.Through calculating and analysing the standard deviation of accumulated temperature above 10℃ in various regions it is noticed that there are some small fluctuations in the cold trend of climate during the last 30 years and they have certain effects on agricultural production in various regions.In order to compare the stabilities of accumulated temperature above 10℃ in various regions,the coefficients of variation of accumulated temperature above 10℃ are calculated.The CV values increase with increasing of latitudes in space and they are correlated to accumulated temperature (less 6000℃) with exponential. Various guarantee(accumulated probability) curves of accumulated temperature above 10℃ for different length of data-series are compared.It is shown that these curves are more stable when the length of data-series is over 50 years.In addition,guarantee curves in different regions are compared,too.Their characteristics and classification are studied preliminarily. According to the slope of guarantee curves within 10-90%,various guarantee curves in different regions in China are classified into three types:stable, instable and neutral. In the end,the relationship between guarantee and return period is also analysed and disccused.It is suggested that guarantee is related to return period with opposite if their non-biased estimators are omitted,
  • A STUDY ON TRANSMISSION OF SELENIUM IN SOIL-PLANT SYSTEM—1.SELENIUM IN SOME NATURAL SOIL IN CHINA
    Zheng Daxian, Li Ribang, Tan Jianan
    1985, 5(3): 209-217. https://doi.org/10.13249/j.cnki.sgs.1985.03.209
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    In order to study the transmission of Se in soil-plant system,the author collected 62 samples from 11 typically natural soil profiles in different natural zones in China,measured Se content in them and other properties,respectively,analysed the distribution of Se in soil profiles and calculated its enrichment coefficient (EF),and then discussed the correlation of Se content to soil proprties and the origination of Se. Based on EF>1 and the close correlation of Se with I content,it is noted that Se accumulation originated from an external source is absolutely not negligible quantity in the enrichment.Through studing the samples,it is found that there are obviously correlations of Se with organic matter content in soil of disease region and Se with R2O3 content in soil of no-disease region.These factors show that the combined forms of Se in soil of the two kinds of region above are so different that they effect certainly on the"efficiency"of Se and its transmission in soil-plant system.
  • THE SURVEY FOR POTENTIAL PRODUCTIVITY OF AGROCLIMATIC RESOURCES AND ITS REGIONIZATION IN JIANGSU PROVINCE
    Long Siyu
    1985, 5(3): 218-226. https://doi.org/10.13249/j.cnki.sgs.1985.03.218
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    The potential productivity of photo-energy,photo-therm and climate (light,temperature and water),and their availabilities in Jiangsu province are evaluated on the basis of survey.It is shown that the agroclimatic potential productivity would be twice to four times of the present yield.It is possible to raise utilization level for the agroclimatic production-potential of whole province from present rate of 16-55% up to 65-75%,and double the food production by the end of this century.Three climatic-production regions and eight subregions are divided into based on the magnitude of agroclimatic production potential and its rate of availablity.
  • THE CHANGE OF PALAEOGEOGRAPHICAL ENVIRON-MENT OF TAI HU REGION DURING HOLOCENE
    Jing Cunyi
    1985, 5(3): 227-234. https://doi.org/10.13249/j.cnki.sgs.1985.03.227
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    Based on sediments,fossils,cultural remains and peat layer,three phrases of the palaeogeographyic change of tbe Tai Hu region can be distinguished:early Holocene (about 10000 B.P-7500 B.P),middle Holocene (7500 B. P-2500 B.P),late Holocene (2500 B.P to present). In the early Holocene when the climate was cold and dry,yellow,grey silt-clay and subclay had been covered on the depressions and plains in the region,the vegetation consistes of deciducous broad-leaved and coniferous mixedforests and steppes. In the middle Holocene when the climate became hot and humid,and the sea level rose to present sea level,the Tai Hu Lake formed.Lacustrine deposit of grey clay and peat were found widely in the region.In Neolithic age man started to settle on the hills of this region.In that time,the vegetation mainly consisted of evergreen broad leaved forests. In the late Holocene when the climate turned to warm and moist,the Tai Hu Lake was expanded,with Yangcheng Hu,Cheng Hu and Dianshan Hu being formed one after another.A alluvial-lacustrine plain with a dense network of river and lake took shape in this region,The vegetation mainly consisted of coniferous mixed forest and hydrophyte such as Potamogetom Sp., Sphagnum Sp.widely grew.
  • A PRELIMINARY STUDY OF THE PLANT RESIDUE OF PEAT IN THE NORTHEAST OF CHINA
    Zheng Xuanfeng, Deng Shouqin
    1985, 5(3): 235-240. https://doi.org/10.13249/j.cnki.sgs.1985.03.235
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    The Northeast Region is one of concentrical distribution area of peat lands in China.In this region there are rich peat reserves constructed by various plant residues.Those residues have become basis of peat classification and utilization. The paper introduced the concept of plant residue,its signification and study way,and then proposed a classification system for plant residue.In additions9 the authors also made preliminary approach to types,characteristics, component and micro-structure of plant residue in peat in the Northeast Region.
  • A STUDY ON COMPILATION METHOD OF LAND TYPE MAP AT THE MIDDLE SCALE
    Wang Huaqun
    1985, 5(3): 241-249. https://doi.org/10.13249/j.cnki.sgs.1985.03.241
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    The compilation of land type map is a more complicatedly systematical work.According to the author’s experience of compilation practice,taking the land type map of the North-west Jilin Province as an example,some problems on compilation method were discussed in this paper. 1.Basic contents of the land type map--cartographic classification of land types:Here 15 land groups,27 subgroups and 77 land families were divided into in this catographic area,in which land family is basic unit. 2.Representation method and colour design:In order to represent the three levels of land type above,the qualitative base method combining colour with symbols was adopted.Colour designed expresses both the action of geomorphologic factors and mirrors the effect of water and heat on land types. 3.Compilation method:Based on the specific conditions of information in the cartographic area,the methods of indoors synthetical analysis of cartographic informations and integration with field observation and examination were used in the compilation. The basic works consist of three steps: 1.Indoors synthetically analysing and using cartographic information, such as interpreting and utilising Landsat image,piling and utilising thematic maps,and analysing and utilising topographic maps etc. 2.carting out sample survey in field work. 3.drawing up compilation principle and procedure.
  • STUDY ON BACKGROUND VALUES OF SOME METAL ELEMENTS IN SOILS OF THE LUOHE RIVER BASIN
    Huang Runhua, You Wenbin, Guo Feng, Jiang Lianjie
    1985, 5(3): 250-254. https://doi.org/10.13249/j.cnki.sgs.1985.03.250
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    Based on study of the geographical environment of the Luohe River basin about 120 soil samples were collected in different geographical units.This paper deals with the background values of metal.element in soil of the basin. After conventional test and statisitcal treatment9 it is found that most of the background values of soils in the basin are in the range reported in the literature at home and abroad.The correlation coefficient matrix of background values is also calculated and the results show that the correlation coefficients of some elements are significant at different levels.This may probably be attributed to the transformation and accumulation processes of these elements during weathering and soil genesis processes.
  • GEOGRAPHER LIU XIANTING IN THE EARLY QING DYNASTY AND HIS THOUGHT OF GEOGRAPHY
    Wang Xianghang
    1985, 5(3): 255-258. https://doi.org/10.13249/j.cnki.sgs.1985.03.255
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    Geograper Liu Xianting in the Early Qing dynasty and his contributions to geography were introduced in this paper.Liu’s thought of geography and works,such as measuring geographical location based on latitude,studing climatic change regularities,establishing a series of correlations between phonology and latitude,topography and wind and rainfall,city development and traffic conditions,and so on,all of those were expounded here,In additions, he suggested that the study work for geography should be carried sistematically and overall.
  • LATEST ADVANCESOF BRANCH GEOMORPHOLOGICAL SURVEY AND MAPPING IN CHINA
    Chen Zhiming
    1985, 5(3): 259-266. https://doi.org/10.13249/j.cnki.sgs.1985.03.259
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    This paper aims to give a brief account of the latest achievements over the past decade in sueh fields as glaciology,frozen earth,desert,coastal and submarine,loess and karst,seismology and volcanology as well as paleogeomorphology from the viewpoints of branch geomorphologieal survey and mapping in our country,various kinds of geomorphologically distributed areas and or their characteristic aspects speak volumes for the richer and varied patterns in gemorphology of China,with special reference to the results in geomorphological classification of various types and the representation in its mapping,thus opening before us a bright prospect for the researches in branch geomorphology as well as its mapping.
  • DISCUSSION ON PRINCIPLES OF PHYSIOGRAPHICAL REGIONALIZATION
    Li Wan
    1985, 5(3): 267-272. https://doi.org/10.13249/j.cnki.sgs.1985.03.267
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    It is worth to discuss the question of regionalism principles of physiography,in order to reach unanimity of opinions.At present,there are various principles for the regionalism,such as genetic principle,composite principle, dominant factor principle and agricultural planning principle etc.The first two principles obviously belong to the category of philosophy opinion,and the last two are methodology ane teleology.In additions,the"zonality and no-zonality" principle is also short of scientific basis for regionalization.After analysing those principles above,the paper suggests that the zonality principle is suitable for regionalism of physiography.That consists of three regularities,i.e. latitude zonality,altitude zonality and geographic distribution zonality of sea and continent,
  • AN ANALYSIS OF PHYSICAL CONDITION AND AGRICULTURE STRUCTURE FOR AGRICUL-TURAL DECISION IN THE SOUTH SLOPE IN CHANGBAI MOUNTAINS
    Wang Wenqing
    1985, 5(3): 273-282. https://doi.org/10.13249/j.cnki.sgs.1985.03.273
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    The Changbai county is situated on the south slope of the Changbai Mountains,90% of its area being over 800 metres above the sea level.The mountaineous forest resources of the cold-temperature zone markedly predominates,with obviously vertical landscape.These advantageous conditions did not give a great of economic and ecologic effects in past time because of the irrational structure of the agriculture.In this paper,based on analysis of agriculturally natural conditions,the author attempt to use the theory of system engineering to find the main factors which might bring the influences upon agriculture structure9 in order to choose an optical decision of the structure. At the same time,the paper make an approach to the qualities of land systems,providing a scientific basis for the adjustment of the county’s agricultural structure.Moreover,a discussion of the researching meathods is involved in the paper.