【摘要】 对不同熟性基因型棉花做不同的播期处理,研究其在不同温光条件下主要发育性状的变化模式,为建立棉花生育与温度关系的机理模型提供理论依据。结果表明:株高的增长动态可用Logistic方程拟合,两品种随播期的推迟,植株的高度减小。第2播期(4月30日播种)中30(早熟品种)在株高快速增长时期的积温效率最大,为0.059 2 cm/℃;第3播期(5月15日播种)最小,为0.048 1 cm/℃;中41(中熟品种)则在第3播期积温效率最大,为0.081 8 cm/℃;第1播期(4月15日播种)最小,为0.065 4 cm/℃。从蕾、铃数看,早熟品种中30蕾、铃的多少对播期的反应比较敏感,中熟品种中41的反应略微迟钝。更多还原

【Abstract】 The different maturity genotype cotton has different seedtime,in order to study the model of main development index in different temperature and sunlight.The results of this study will be useful to setting up the mechannical simulation model of cotton growth and development.The results were shown as follows: the Logistic recursive equation was used in the height of stem,the height decreased with the delay of sowing date.The greatest efficiency of accumulated temperature of CCRI 30 was 0.059 2 cm/℃ in the second sowing date of rapid growth period,the lowest of that was 0.048 1 cm/℃ in the third sowing date.To CCRI 41 the highest of the efficiency of accumulated temperature was 0.081 8 cm/℃in the third sowing date of rapid growth period,the lowest of that was 0.065 4 cm/℃ in the first sowing date.The response of the quantity of square and boll of CCRI 30 was sensitive in different sowing dates,but that of CCRI 41 was not.更多还原