摘要
在盆栽和池栽条件下,对杂交稻汕优63、矮优1号、矮优63和常规稻明恢63、珍汕97B、二九矮7号B、日本晴等品种的再生稻开花期定花观察结果表明:诸气象要素对再生稻结实率均有一定影响,但起主导作用的是日平均温度;日平均温度17.4～26。3℃,温度与结实率呈显著正相关;日平均温度<22℃的结实率,汕优63显著或极显著地高于参试籼稻品种,与粳稻日本晴无显著差异,即汕优63再生稻开花结实期耐低温性能较强;综合两年结果汕优63再生稻正常开花结实(结实率63≥75％)的日平均温度理论值为≥19℃。
In the pot and the pondlet experiments, the ratooning setting percentage of both the hybrid rice varieties (Shanyou63,Aiyou Land Aiyou 63) and the conventional rice varieties(MinAui 63, Zhen-shan 97 B,29Ai 7 B and Nihon hare) whose blooming stage under low temperature had been examined by the fixed sp:kelet method. The results showed that the climatic factors had effect upon the setting percentage of ratoon rice, but the primary factor was the mean daily temperature. When it was 17.4 -26.3℃, there was a significant positive correlation between the temperature and the setting percentage of ratoon rice. When it was below 22℃,the setting percentage of ratooning Shanyou 63 was much more higher than that of other indica varieties tested.but there was not significant difference compared with Nihon hare (a japanica variety) .namely, the tolerance of Shanyou 63 to low temperature at bloom stage was better than that of other varieties. To sum up two years' observation, the theoriti-cal value of the mean daily temperature of Shanyou 63 at bloom stage was ≥19℃ which could insure the setting percentage to reach at≥75%.
出处
《西南农业学报》
CSCD
1989年第3期27-31,共5页
Southwest China Journal of Agricultural Sciences
关键词
稻
再生稻
开花期
品种
耐低温性
Paddy rice
Ratoon rice
Blooming stage
Setting percentage
Tolerance to low tem- perature
Chongqing
