关键词: 东北地区, 气候类型, 气候因子, 玉米产量, 一阶差分

Abstract: The meteorological stations with continuous meteorological data and maize yield data in Northeast China during 1981-2009 was divided into 4 zones according to temperature （Tmean）， sunshine hours （SH） and precipitation （P）， in which the climatic maize yield was calculated by using of first differences method. The sensitivity of maize yield to climate change was analyzed by using of multiple regression method. The results showed that the climatic maize yield decreased though actual maize yield increased during 1981-2009. The sensitivity of climatic maize yield to， in climatic type I zone， Tmax， AT， DTR （daily temperature range） and SH was high， with the standard coefficients were-1.244， 1.484，-0.655 and 0.502 respectively. In climatic type II zone， the sensitivity of climatic maize yield to Tmin， AT， DTR and SH was high， with the standard coefficients were 1.325，-1.739，-0.272 and-0.515 respectively. In climatic type III zone， the sensitivity of climatic maize yield to Tmax， AT， P and SH was high， with the standard coefficients were-2.171， 3.450， 0.235 and 0.493 respectively. In climatic type IV， the sensitivity of climatic maize yield to Tmin， AT， P and SH was high， with the standard coefficients were 0.88，-1.014， 0.329 and 0.256 respectively. Climatic maize yield was sensitive to AT in all types zones， was sensitive to Tmin in high temperature zones， was sensitive to TmaX in moderate and low temperature zones. Climatic yield was sensitive to P and SH in high precipitation zones， and was sensitive to DTR and SH in moderate and low precipitation zones.

Key words: Northeast, Climate types, Climate factors, Maize yield, First differences