Abstract: Based on the parallel observation in experimental fields in Xifeng City of Gansu Province, the climatic characteristics of winter wheat extraordinary flourishing on Loess Plateau of eastern Gansu in 2006 and the responses of many years winter wheat’s autumn growth to climate warming were analyzed. The results showed that the winter wheat extraordinary flourishing in autumn 2006 was an event with relatively smaller probability. When the mean air temperature in October was ≥10.0 ℃, the winter wheat height growth in autumn increased obviously with increasing air temperature; and when the accumulated temperature of ≥10.0 ℃ achieved above 580 ℃, the height growth increased obviously with increasing accumulated temperature. When the mean air temperature in October ascended by 1 ℃, the leaf area index increased by 0.4; and when the accumulated temperature of ≥10.0 ℃ achieved above 550 ℃, the leaf area index increased obviously with increasing accumulated temperature. The numbers of big tiller increased in counter-parabola shape with the increasing mean air temperature in October and accumulated temperature of ≥10.0 ℃. In order to actively control the winter wheat extraordinary flourishing before winter and to reduce the unreasonable consumption of soil moisture and nutrients, autumn sowing should be postponed about 5 days, so as to positively and effectively reduce the negative effects of climate warming on winter wheat growth.

Key words: Paddy rice, Biochemical qualities, Climate conditions, Anning River Valley