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    25 September 1993, Volume 8 Issue 3 Previous Issue    Next Issue
    Special Column:Celebration of the 70th Anniversary of IGSNRR, CAS
    A STUDY ON THE DYNAMIC VARIATION OF THE BOUNDARIES BETWEEN AGROCLIMATIC ZONES AND ITS INFLUENCE ON AGRICULTURAL PRODUCTION IN THE SUBTROPICAL REGION OF CHINA IN THE LAST HUNDRED YEARS
    Yang Bai, Li Shikui, Huo Zhiguo
    1993, 8 (3):  193-203.  doi: 10.11849/zrzyxb.1993.03.001
    Abstract ( )   PDF (679KB) ( )   Save
    In this paper, the dynamic variation of the norhtern boundaries of the North-, Middle-and South-subtropical zones and its influence on agricultural production in the subtropical region of China in the last hundred years are studied by analyzing the climatic data of 315 meteorological stations. The main results show:(1)The northern transitional zone of the South-Subtropical Zone is narrower than those of the others. The northern transitional zone of the North-Subtropical Zone in the plain is about 1. 5 degrees of latitude on the average and is wider than that in the mountainous areas. The width of the transitional zone between the North-and Middle-Subtropical Zone in the Poyang and Dongting Lakes plain is about 1. 5 to 3 degrees of latitude, while in other parts it is much narrower.(2)The range in which the line of demarcation swings in different periods is narrower for the northern boundary of the South-Subtropical Zone and wider for those of the others. For the northern boundaries of the North-and Mid-Subtropical Zones, the swing range is wider in the plain than in the mountainous areas. In the plain, for the northern boundary of the North-Subtropical Zone, the distance between the lines of demarcation in the coolest and warmest periods is 1. 5 degrees of latitude on the average. In the Poyang and Dongting Lakes plain, for the Northern boundary of the Mid-Subtropical Zone, it is 2 degrees of latitude on the average.(3)In the last hundred years, the variation of agroclimatic zone may cause the northern boundary of the double cropping rice to swing about 1 degree of latitude at most, and the swing is close to 1 degree of latitude for the suitable and probable planting regions of orange.
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    THE SE RESOURCE IN SOUTHWESTERN HUBEI PROVINCE, CHINA,AND ITS EXPLOITATION STRATEGY
    Zheng baoshan, Yan Liangrong, Mao Dajun, et al
    1993, 8 (3):  204-212.  doi: 10.11849/zrzyxb.1993.03.002
    Abstract ( )   PDF (556KB) ( )   Save
    The Se-rich carbonaceous siliceous rocks and carbonaceous shales of Permian Maokou Group are outcrop wildely in southwestern Hubei Province, China. The maximum Se contents in rocks and soils and in corn grown on Se-rich soils are 8390, 354 and 40 mg/kg respectively. The evaluation of the Se-resource is made and the best developmental way of the resource is discussed in this paper.
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    A PRELIMINARY STUDY ON THE FUNCTIONAL CLASSIFICATION OF RURAL ECONOMY——TAKING THE HUANG-HUAI-HAI REGION AS AN EXAMPLE
    Yao Jianqu
    1993, 8 (3):  213-222.  doi: 10.11849/zrzyxb.1993.03.003
    Abstract ( )   PDF (505KB) ( )   Save
    The study of rural functional classification, which mainly deals with the comprehensive rural-space division in terms of the utilization of rural resources, the areal division of labour, the regional change of function, the harmonization of agricultural structure and the composition of industrial sector, has formed a major research field of rural geography both inside and outside China.Taking 365 counties (or cities) of the Huang-Huai-Hai Region as the areal study units, this paper analyses the structural function of the exploitation of rural resources, identifies the functional features and extracts the functional indices. On this basis, this paper then makes a classification of the rural functional types and explores the spatial distribution law of these types, the industrial features and the regional development ways of the resources for the region.
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    A DISCUSSION ON THE ESTABLISHMENT OF PROTECTION FOREST SYSTEM IN THE MIDDLE REACHES RIGION OF YALUTSANGPO RIVER,TIBET
    Liao Junguo
    1993, 8 (3):  223-228.  doi: 10.11849/zrzyxb.1993.03.004
    Abstract ( )   PDF (479KB) ( )   Save
    The Middle Reaches Rigion of Yalutsangpo River, which is characterized as a little forest resources and low vegetation caverage ecostone, is not only the social-economic and political-culture centers, but also main agricultural zone in Tibet. With population increasing rapidly and concentrating relatively in modern times, the erosion and the desertization were aggravated, the varying degrees losses in the agriculture and animal husbandry and the national economy were caused by grassland degeneration and frequent natural disasters. In view of above-mentioned reasons, development of forestry, especially establishment of protection forest system occupies a strategy place in improving the ecological environment of the unique Qinghai-Tibet Plateau langd-scape and The Middle Reaches Rigion of Yalutsangpo River.The general design of the Protection Forest System in the Rigion as following; under the concept of conservation forestry, the protection forest belt along rivers (Lhasa river, the middle of Yalutrangpo river and Nianchu river) will be established at first,which is the framework of the Protection Forest System; the protection forest network will be achieved on farmland and grassland in valley; the fuelwood -timber forest and the "four sides "forest will be afforested according to various site conditions. The biggest comprehensive protction forest system will be established in the Plateau for protecting the unique high-cold agricultural zone and "the third pole over the world".
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    A STUDY OF COMPREHENSIVE EVALUATION OF THE WATER RESOURCE CARRYING CAPACITY IN THE ARID AREA——A case study in the Hetian river basin of Xinjiang
    Xu Youpeng
    1993, 8 (3):  229-237.  doi: 10.11849/zrzyxb.1993.03.005
    Abstract ( )   PDF (586KB) ( )   Save
    Taking the Hetian river basin as an example, this paper primarily explores the method of comprehensive evaluation of water resource carrying capacity and sets up an evaluation model by applying the fuzzy comprehensive evaluation method. The water resource carrying capacity in the Hetian river basin is evaluated by means of this model. It provides a decision-making basis for water resource development in the basin. Meanwile, this study provides a new method of the e-valuation of the water resource carrying capacity for arid areas in general.
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    EVALUATION OF THE INVERSION RESOURCE IN SUBTROPICAL MOUNTAINOUS AREAS OF CHINA
    Huo Zhiguo, Li Shikui, Yang Bai
    1993, 8 (3):  238-246.  doi: 10.11849/zrzyxb.1993.03.006
    Abstract ( )   PDF (581KB) ( )   Save
    In this paper, the occurrence probability of inversion .the average elevation and the depth of the inversion layer, and the largest intensity of inversion in subtropical mountainous areas of China are given. The laws of the spatial and temporal distribution of inversion in mountainous areas and the effect of some factors on the distribution of the inversion warm belt are described lastly, the ways of exploiting and utilizing the inversion resource in subtropical mountainous areas of China are proposed.
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    THE DISTRIBUTION OF TEMPERATURE IN WINTER, THE FEATURES OF INVERSION AND THE SELECTION OF THE ADAPTIVE FIELDS OF CITRUS IN THE SHALLOW MOUNTAIN AREA OF THE BAILONGJIANG VALLEY OF SOUTH GANSU
    Lin Rinuan
    1993, 8 (3):  247-253.  doi: 10.11849/zrzyxb.1993.03.007
    Abstract ( )   PDF (485KB) ( )   Save
    In this paper, the distribution of temperature in winter and the features of inversion in the shallow mountain area of the Bailongjiang valley of south Gansu are analysed. Also the causes of inversion occurrence and the agroclimatic ecological superiority of the warm layer of inversion which adapts to the biological characteristics of citrus trees are expounded. Finally, on the basis of the macroscopic temperature in winter and the distribution rules of orographic inversion, the method of selecting the adaptive fields for citrus in the warm layer in the shallow mountain area is proposed.
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    A PRELIMINARY STUDY ON THE NATURAL PRODUCTION POTENTIAL OF PADDY SOIL IN DANYANG CITY,JIANGSU PROVINCE
    Yang Jingping, Zhang Xigu
    1993, 8 (3):  254-261.  doi: 10.11849/zrzyxb.1993.03.008
    Abstract ( )   PDF (495KB) ( )   Save
    In this paper the crop growth simulation model developed by Penning ele Vries in 1988 and Fuzzy mathod are used to analyze the natural production potential of soils under two cropping systems. The results show that the climatic yield potential of the system of simulated wheat/corn-late rice cropping is about 3000kg/ha higher than that of the system of wheat-single rice cropping. The wheat yield can reach or come close to the climatic yield potential under better soil drainage condition , while the climatic yield potential of corn is greatly affected by the yearly rainfall variation. The natural production potential of the paddy soil genuses in Danyang city is 12645kg/ha when the wheat-single rice cropping system is used. But the yield potential can reach 16495. 5kg/ha if the effect of chemical fertilizers on the yield increase is considered. According to the results mentioned above,the wheat production in Danyang city should emphasize the increase of the natural production potential of soils. As for the single rice,its production should mainly depend on the increase of the climatic yield potential of the crop varieties.
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    ON THE HISTORICAL PROCESS OF THE RESOURCE SCIENCE RESEARCH
    Feng Zhiming, Wang Qinxue, Cheng Yuansheng
    1993, 8 (3):  262-269.  doi: 10.11849/zrzyxb.1993.03.009
    Abstract ( )   PDF (635KB) ( )   Save
    The resource science research is an important basic building block of the civilization development of society. The evolution of the man-resource relationship has experienced three stages:the period of the worship of nature,the period of selfish departmentalism and technique revolution, and the period of the modern coordinative development. The real resource science research was initiated in the early 20th centry. As the three great pillars of the resource science research,resource geography,resource ecology and resource economics have developed quickly. The resource science research in recent 20-30 years indicates that the modern resource science has three tendencies.(1) Strategical researches on the dynamic prediction. the areal developmental model and the relationship between the resource supply and actual requirement are becoming more active;(2)Managerial researches based on the rational utilization of resources are becoming a hot feild of resource science ; (3)The researches proceed from qualitive analysis to quantitative analysis and modeling.
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    A RESEARCH ON REALIZING THE INTEGRATED EVALUATION INDEX SYSTEM OF TERRITORIAL RESOURCES ON A COMPUTER
    Li Zehui
    1993, 8 (3):  270-280.  doi: 10.11849/zrzyxb.1993.03.010
    Abstract ( )   PDF (689KB) ( )   Save
    In this paper, the author first probes the integrated evaluation system of territorial resources and proposes the corresponding evaluation index. Then the author introduces how to establish a system on the computer in which the evaluation index of resources can produce automatically and the method of how to use this system to produce the needed index. Also, the problems which need to be studies further are pointed out. What the author has done is to provide some experiences for the automation of evaluating the study of the exploitation of regional resources.
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    STUDY AND UTILIZATION OF THE CRUCIFEROUS OIL PLANT RESOURCE OF THE GRASSLAND OF WEST SICHUAN
    Luo Peng, Zhang Zhaoching, Yang Yi, Wang Youping
    1993, 8 (3):  281-285.  doi: 10.11849/zrzyxb.1993.03.011
    Abstract ( )   PDF (792KB) ( )   Save
    Recently,the Institute of Botany of Sichuan University has conducted a systematic investigation of the wild cruciferous oil plant resource of the grassland of West Sichuan and collected the specimens of plants and seeds belonging to about 12 genera and 20 species. According to the results of seed oil analysis and plant introduction, the following oil plants are selected for further study and utilization. They are the edible oil plant species Descurainia sophia and Thlaspi arvense, the high quality edible oil plant species Rorippa elata,and the oil plant species Malcolmia africana and Lepidium apetalum which can be used in indurstry.
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