摘要
用不同浓度的NaCl、Na2SO4、NaHCO3和Na2CO3混合液对小白菜(Brassica chinensis L.)种子进行种子萌发试验,观察小白菜种子在不同浓度盐碱胁迫下的发芽率和发芽指数.结果表明,在混合盐碱胁迫下,小白菜种子的发芽率、发芽势、发芽指数和活力指数均随pH值增大和盐浓度的升高呈下降趋势,且各萌发指标与盐浓度的相关系数明显大于pH值,可见小白菜种子发芽受盐浓度的影响更大.低浓度(50 mmol·L-1)盐碱胁迫对小白菜种子萌发影响不大,高浓度(200 mmol·L-1)盐碱胁迫下小白菜的种子萌发受到严重影响.
In this paper, we observed the germination rate and germination index ofBrassica chinensis L. seeds under mixed salt and alkali stress after they were treated with different concentrations ofNaCl, Na2SO4, NaHCO3 and Na2CO3. The results showed that seed germination rate, germination energy, germination index and vigor index were decreased with the increase ofpH and salt concentration. The correlation between germination index of B. chinensis with salt concentration was much more significant than with pH, suggesting that salt concentration had a more obvious effect on germination. Low concentration (50 mmol·L-1) salt and alkali stress had little effect on seed germination ofB. chinensis, but high concentration (200 mmol·L^-1) salt and alkali stress seriously affected seed germination of B chinensis.
出处
《生态科学》
CSCD
2010年第6期568-572,共5页
Ecological Science
基金
江西省教育厅2010年科技项目(GJJ10255)
上饶师范学院2010年科技项目(201009)
关键词
混合盐碱胁迫
小白菜
种子萌发
mixed salt and alkali stress
Brassica chinensis
seed germination