气象条件对e型杂交稻的影响

Influence of Weather Conditions on the e-type Hybrid rice

为合理安排e型杂交稻播栽期以及防御不利气象条件的影响,通过e型杂交稻的分期播种资料找出对其影响的关键气象要素及阶段,对e型杂交稻新组合不同播种期的主要性状进行分析,并与其对应的气象条件进行相关分析。结果表明,e型杂交早稻对气象条件要求最敏感的时期是始穗前后0～10 d,而e型杂交晚稻对气象条件最敏感的时期则是始穗前0～10 d;e型杂交早稻最适播种期为3月下旬,随着播种时间推迟其产量优势呈下降趋势;e型杂交晚稻e优21在赣南作一季稻栽培具有较好的高产潜力,且最适播种期为4月中旬至5月上旬。

In order to arrange reasonable sowing time for e-type hybrid rice against adverse weather,the relationship between the main traits of several new e-type hybrid rice combinations sowed in different time and the corresponding weather conditions were analyzed.The results showed that the most sensitive period of the e-type hybrid early rice to the weather conditions was 0~10 days after the beginning of spike,while that of the late rice was 0~10 days before the beginning of spike.The optimum sowing time of e-type hybrid early rice was the last ten day of March,with the delay of sowing time,its high yield advantage would weaken.＂e you 21＂,a new combination of late rice,cultivated as single-season rice in southern Jiangxi had good yield potential and its optimum sowing time should be the middle ten days of April to early ten days of May.