摘要
通过多年、多播期、多品种结实期分段取样和人工气候箱控温试验,结果表明,水稻齐穗后20d内是稻米粒重和整精米率形成及其对环境因素影响反应的主要和敏感时段;粒重和整精米率有效积累天数和积累速率对结实期温度影响的反应存在相互补偿作用,并据此估算出粒重形成的适宜温度指标为:籼稻24.14~25.50℃,粳稻23.65~24.83℃;整精米率形成的适宜温度指标为:籼稻23.11~24.65℃,粳稻21.61~23.48℃;
The experiment was conducted under different sowing dates and varieties, and samples for the experiment analysis were collected at different phases during rice filling stage.Based on that, the results about the effects of the temperature on the development of the grain weight and head rice rate showed that the 20 days after full heading date could be infered as the key stage for seed weight and head rice rate to develop and sensitive stage to the environmental condition. There was the compensive founction between available accumulation days and accumulation rate to the effect of the temperature , in the other words , if the temperature went up (or down ), the accumulation rate would be raised (or lowered) and the available accumulation days would be shorted (or prolonged); others, the concept about the accumulation and expending founction of the temperature affecting results was also put forword.
出处
《西北农业学报》
CAS
CSCD
1996年第4期31-35,共5页
Acta Agriculturae Boreali-occidentalis Sinica
关键词
水稻
粒重
整精米率
温度
Rice
Head rice rate
Grain weight
Temperature