ELEMENTARY RESEARCH ON DAMAGE TO RICE DONE BY LOW TEMPERATURE IN HANZHONG BASIN OF SHAANXI PROVINCE

In this paper, by twice comparative examinations analysis of variance and regressive integration, the temperature scale on damage to rice done by low temperature is calculated; the empirical formula of integration of yield forecast and the time function i(t) which shows the influence of temperature to yield are established; therefore the quantitative relation of rice yield and temperature distribution is revealed; and this will provide the foundation for steady and high production.