汕优63制种中实效积温的应用及穗期预测数学模型的建立

Application of Effective Accumulated Temperature and Establishment of Mathematical Model for Predicting Heading Time in the Seed Production of Shauyou 63

提出了实效积温的概念，并确立了汕优６３制种生产中父母本实效积温的区间为１３～２６℃。根据扬州市红旗良种场连续３ａ的实践，以实效积温为主要依据安排播差是可靠的。还建立了实效积温为主要自变量预测父母本始穗期的数学模型。

Based on an analysis of eight years’ data, it was found that the optimum growth temperaturerange was 13～26℃ for calculating the effective accumulated temperatures of the parents of Shanyou 63,and seeding interval between these two parents could be determined according to the EAT difference. Futhermore, a mathematical model with EAT as the major independent variable for estimating heading dateof the male and female parents in early growth stages, This model was applied in the seed production ofShanyou 63 at the Hongqi Seed Farm of Yangzhou City, Jiangsu Province in 1993 and 1994,and found to bevery practicable in the prediction of heading time in early growth stages.