不同杂交稻组合再生特性的比较

为了筛选再生力强、丰产性好、适应性广的杂交稻优良组合，对6个不同熟期的杂交水稻组合在同一栽培条件下比较其再生特性，结果表明，生育期较长，头季后期干物质生产最高，可溶性糖含量高的组合再生力强；各组合头季稻产量间差异不显著；由于各组合再生力不同，腋芽萌发有很大差异，再生季产量差异显著，增矮64S／E32，增两优500再生季产量分别比对照汕优63增产26.19%,23.81%，达极显著差异水平。因而增矮64S／E32，培两优500可作为湖南地区蓄留再生稻品种。

A Comparative of Ratooning Characteristics of Different Hybrid Rice Combinations

The comparison of ratooning characteristics of 6 different hybrid rice combinations were studied under the condition of the same culture.The result shows that the combinations with longer growth stage and higher dry matter production at late stage of main crop and higher soluable carbohydrate in stem were of better ratooning ability. The differences of average yield of main crop between varieties did not reach significant level. There was significant difference of the axillary bud sprouting in ratooning rice because of the difference of ratooning ability between different combinations. So there were significant differences of grain yield in ratooning rice, the yields of Peiai64S/E32 and Peiliangyou500 were 26.19% and 23.81% higher than that of Shanyou63 respectively, reaching an extreme significant level.Therefore Peiai64S/E32,Peiliangyou500 can be used as ratooning varieties in Hunan.