【摘要】 <正> 根据水稻品种的生育期,确定品种布局和播栽适期,是合理利用水稻品种的栽培季节适应性,充分发挥良种增产潜力的基础。所以,在不同生产条件下,水稻品种生育期的预测是一项十分重要的工作,特别是苗情测报和遇灾补播,常需要比较准确地确定水稻品种的生育进程或最迟补播时期,生育期预测就显得更为重要。水稻品种生育期的预测,可通过多种更多还原

【Abstract】 This paper atempts to bwld the forecast model of the growth stage bas-ed upon the experimental data of the growth developemental character inthe different sowing times of the different rice ecotypes in 1976—1981.（1）The regression and correlation of 10 varieties of different ecoty-pes（3 early rice vat.,4 late rice vat.,3 cross rice）are analysed.Thesowing times began on March 26 until the middle decade of July.The inter-vals among sowing times were about 10 days for each.In the regressionequation,the number of days of the sowing time was taken as the indepen-dent variable （X,March 1st taken as1）,and the number of days ofthe Sowing—differentiation,Sowing—heading and the postponing headingwas taken as the dependent Variable（（?）₁,（?）₂,（?）₃,the differentiation stageand heading stage of the first Sowing time as 1）.Analysis Shows thatthe built regression equation has practical significance for forecastinggrowth stage.（2）According to the thermo—photo equation of the late rice varietybrought forword by the Nanjing Agricultural Scientific Research Institutthe foreacast-model of growth stage of the late rice of the double croppingrice was built.Analysis shows that the built thermo-photo model has prac-tical significance for forecasting the process of growth in late rice of thedouble cropping rice.更多还原