不同类型水稻再生特性的比较研究

Comparison of ratooning characteristics of different types of rice

为了解水稻的再生特性,在同一栽培条件下对30个不同水稻品种(组合)的再生特性进行研究。结果表明,不同品种(组合)头季稻加再生稻的产量之间存在显著的差异,供试材料间再生率的差异很大。根据再生苗的萌发动态可将供试材料分为3种类型:第1类为再生苗萌发早,最终再生率高;第2类为再生苗萌发迟,最终或最高再生率高;第3类为再生苗萌发迟,最终或最高再生率低。经相关分析表明,最终再生率与头季稻收获后各时期的再生率都呈极显著正相关;再生稻实际产量与每穴穗数及各期再生率也呈正相关,并与每穴穗数达到显著水平。

In order to know the ratooning characteristics of rice, 30 different rice varieties （combinations） were studied under the same cultural condition. The results showed that the differences of total yield between main cropping and ratooning cropping and ratooning rate among different rice varieties （combinations） were significant. The 30 rice varieties （eombinations） were classified into three types according to their ratooning characteristics. The first type was of early germination of ratooning seedling with high ultimate ratooning rate; the second was of late germination of ratooning seedling with high ultimate or highest ratooning rate; the third type was of late germination with low ultimate or highest ratooning rate. The correlation analysis indicated that the ultimate ratooning rate was highly significantly positive correlated with that of each date after main cropping harvested , and the actual yield of ratooning rice was significantly positive related with panicles per hole, each date ratooning rate and up to significant level with panicles per hole.