东北粳稻芽期耐盐碱性差异研究

为选育耐盐碱水稻品种,以东北三省耐盐碱性不同的40份粳稻为试验材料,在3个盐碱胁迫处理(25、50、75 mmol?L‐1 NaHCO3)下进行芽期耐盐碱性筛选试验.结果表明:在同一盐碱胁迫处理下,不同水稻品种间表现耐盐碱程度不同;在不同盐碱胁迫处理下,随着盐碱处理浓度的增加,不同水稻品种的发芽率、芽长、根数、根长、干重呈下降趋势.通过试验筛选出长白10号、通88‐7、农大3号、富源4号和通育318共5个耐盐碱性较强的水稻品种(系).

Study on the Difference of the Alkaline Tolerance of Northeast Japonica Rice at Germination Stage

In order to breed saline-alkaline tolerant rice variety,40 japonica rice cultivars of different saline-alkaline tolerance,which were mainly planted in the northeastern three provinces,were taken as test materials to conduct screening test with three saline-alkaline treatments at the germination stage which the concentration of NaHCO3 were 25、50、75 mmol·L-1.The results indicated that under the same saline-alkaline treatment,the ability of saline-alkaline tolerance was different among different rice cultivars;under the different saline-alkaline treatments,with the increasing of concentration of NaHCO3,the germination percentage,bud length,root number,root length and dry weight of different rice varieties showed downward trend.Through the screening test,five stronger saline-alkaline resistant rice varieties(lines) were selected,which were Changbai No.10,Tong88-7,Nongda No.3,Fuyuan No.4 and Tong 318.