适宜再生水稻品种的筛选及其产量结构差异性分析

Screening of Suitable Ratooning Rice Varieties and Analysis of Their Yield Structure Difference

以江西省近3年审定的24个优质中晚稻品种为材料开展再生稻品种的筛选研究,对这些品种的生育期、产量、产量构成因素和再生力进行了差异性分析。结果表明:再生稻的头季产量与单位面积有效穗、每穗实粒数呈显著的正相关关系;再生季产量与有效穗呈极显著的正相关关系,与每穗实粒数呈显著的正相关关系;再生力与再生季产量呈显著的正相关关系;在供试的24个品种中,准两优608、欣优827、五优328、农香优华占和五优航1573可在赣北地区作再生稻推广种植。

We chose 24 high-quality middle and late rice varieties which were approved by Jiangxi province in recent 3 years as the tested materials, carried out a screening study to find out suitable ratooning rice varieties, and analyzed the differences in growth period, yield, yield components and regenerative capacity among these varieties. The results showed that the grain yield of ratooning rice had a significantly positive correlation with both the number of effective spikes per unit area and the number of filled grains per spike in the first cropping season. In the regenerative season, the grain yield of ratooning rice was very significantly pos- itively correlated with the number of effective spikes per unit area, and was significantly positively correlated with the number of filled grains per spike. There was a significantly positive correlation between the regenerative capacity and the grain yield in regen- erative season. Among the tested 24 rice varieties, Zhunliangyou 608, Xinyou 827, Wuyou 328, Nongxiangyouhuazhan and Wuy- ouhang 1573 could be popularized and planted as ratooning rice in the north area of Jiangxi province.