| In order to analyze the influence of the temperature variationson the yield of spring wheat with different cultivation measures, the spring wheat yields resulted from cultivation measuresemploying two-factor, nine-level and three-typewere simulated by the APSIM model. Yielding-effect was analyzed by choosing the lowest and the highest day temperatures as the independent variable factors. Interacting effectsbetweenthe lowest and the highest temperatures under three kinds of tillage measures were also investigated by a path analysis. It turned out that under the conditions of different tillage measureswith the increase of the lowest temperature, the yield of spring wheat changed in a quadratic parabola rising pattern, displayinga decrease inrewards.The cultivation measure using conventional tillage,straw returning and no-tillage with mulch played a more important role in yield improvement than no-tillage cultivation. Under the condition of traditional tillage, straw returning and no-till farming measures, the yield decreased in a quadratic parabola type ashighest temperature rose, showinga superposition of diminishing.Yield was negatively correlated with the highest temperature while the production was under covered no-till farming measures. Withinthe three kinds of cultivation measures, there was a positive synergy between the lowest temperature and highest temperature, and cultivation measure usingno-tillage with mulch had a better synergistic promoting effect than the other two kinds. |