Loading...

Table of Content

    15 January 1959, Volume 25 Issue 1 Previous Issue    Next Issue
    THE GENERAL CHARACTERISTICS OF TEMPERATURE DROP IN WINTER IN SOUTHERN CHINA
    CHIANG AI-LIANG
    1959, 25 (1):  47-66.  doi: 10.11821/xb195901004
    Abstract ( )   PDF (1339KB) ( )   Save
    The winter climate of South China is usually mild, but occasionally when the cold waves break out from Siberia or elsewhere and push southward, the temperature may drop 10, 15, or even 20℃ within a few days, therefore damages caused by the sudden drop ef tempe-rature on tropical plants were incurred frequently. Comparisons of changes of temperature of Northwest, North and Central China, indicate that the drop of temperature in South China is the most striking one during the invasion of cold waves. Here the author proposes the use of complex index number for the temperature variations, so the special characteristics of the temperature range and the interdiurnal tempera-ture variation may be revealed. A discussion is also given for the low temperature damages to agricultural plants. In this paper much attention was placed on the distribution of such to:v temperatures as influeaced by different topographical features during the cold spells, and suggestion was made as to how to select shelters for tropfeal agricultural plants. Four kinds of temperature dropping types effecting agricultural plants were mentioned. And measures to be taken for protection of pleats against low temperature damages were suggested.
    Related Articles | Metrics
    ON THE METHODOLOGY OF ZOOGEOGRAPHICAL RECONNAISSANCE FOR PRACTICAL PURPOSES
    CHANG YUNG-TZU
    1959, 25 (1):  101-104.  doi: 10.11821/xb195901007
    Abstract ( )   PDF (354KB) ( )   Save
    An attempt has been made to present an outline for zoo一geographical field work with a view to linking up reconnaissance research with economic reconstruction. Emphasis has been laid on the observation of such items as: (1) the physical envi-ronment of the biotope; (2) the composition and the population of the fauna; (3) the habits and the reproduction of the dominant species; (4) the influences of the dominants on the environment; (5) the parasites of the dominants; and (6) the species favorable to man and those unfavorable. The experiences of the mass of people in treating these 2 groups of speciesshould be highly regarded and the correlation of ecological phenomena to tfte geographica landchaft be advocated. A thorough and careful lstudy of the spatial similarities and differences regarding all the faunistic anti the ecological phenomena may serve asthe basis of drafting schemes for utilization, control and extermination. Care should be taken to guard against the indulgence in the new or rare species, since such may be entirely of no practical use. A reconnaissance research is but the first step in the task of trangform?hg the animal world. It should be follow-ed by detail studies of such problems as may confront any practical work. These reguire more ecological and eco-zoogeographical methods.
    Related Articles | Metrics
Share: