Abstract:

Plant phenology show in advance trends with the temperature warming in northwest China desert areas. Then, is sensitive to changes in phenology number of days, or in accumulated temperature sensitive in sustained duration of phenological? What are the causes of change? The change tendency of temperature and the phonological was expressed by trend-line of one-dimensional-linear. The correlation between the phenological and the temperature was expressed by relationship coefficient, and the significance of the relationship coefficient was made by the t-test. The results showed that as temperatures rise, the number of days phenological sustained varying degrees of growth, the accumulated temperature phenology duration change is more sensitive than the phenology sustaine days. Accumulated temperature changes in phenology sustained days largely by the number of days due to increase or decrease. Followed by the rise due to higher temperatures, This is other relevant research literature has not reported before. Impact of annual average temperature for the phenology sustained days > average temperature on start the month the phenological> average temperature on phenological began last month> the average temperature in the continued duration of phenologica and monthly mean temperature on phenology end.