【摘要】 采用菲波拉奇数列来模拟小麦个体拔节前理想条件下的茎蘖动态 ,并将小麦分蘖能力作为品种遗传参数来修正不同品种的分蘖潜力 ;采用叶面积指数影响因子和群体同化物供应状况来描述群体自身对茎蘖发生的影响 ;采用水分和氮素丰缺因子来模拟水分和氮素条件对群体茎蘖数的影响。拔节后群体茎蘖数的下降受到同化物供应状况和有效热时间的影响 ,并将有效分蘖可靠叶龄期的茎蘖数作为不同品种最小茎蘖数。利用不同田间试验资料对模型的检验结果表明 ,模型对小麦茎蘖动态的预测具有较好的解释性和可靠性 ,预测平均误差小于 10 %。更多还原

【Abstract】 Tiller dynamic was simulated in two growth periods, from seedling to jointing and from jointing to maturity. Fibaracci equation was used to quantify tiller dynamic before jointing under ideal condition, and variety tiller potential was used to characterize genetic effect. Leaf area index and assimilate supply factors were used to calculate the effect of population on the tiller generation. Water and nitrogen deficit factors were used to reflect the effect of environment. From jointing to maturity, assimilate supply factor and daily thermal time were used to calculate the decrease of tillers, and the effective tiller number before jointing was obtained as the minimal tiller number. Validation of the model with different field experiment data indicates a high fit between prediction and observation with the average relative errors less than 10%.更多还原