贵州不同穗型超高产杂交稻的根系特点

为了探讨贵州不同穗型超级杂交稻根系特点的差异,对不同穗型的超高产水稻的根系,采用根箱钉板法研究了全量根系在土壤中纵向、横向的分布特征和根系活力特征.结果表明,后期耐早衰的多穗型金优431表现根系生物量大,深根系比例高.根系横向分布随土壤深度增加,趋向离开植株中心分布.根系重量密度以表层最高,并随深度增加逐渐下降.多穗型金优431在表土层以下的根系重量密度比大穗型黔南优2058明显提高,齐穗期后根系活力下降比黔南优2058慢,表层浮根也比黔南优2058生长量多.

Roots Characteristics of Super-high Yield Hybrid Rice Varieties with Different Panicle Types in Guizhou

The vertical and horizontal distribution characteristic of total roots and their roots activity of two super-high hybrid rice varieties with different panicle types were observed by the root culture box method to study difference of roots characteristics between super-high hybrid rice varieties with different panicle type.The results showed that Jinyou 431 with senescence tolerance and multi-panicle type has higher roots biomass and the proportion of the deeper roots is high,the roots horizontal distributio...