摘要
应用培养试验研究了50-250mmol／LNaCl对4个燕麦Arena sativa品种种子萌发的影响，并利用田间试验研究了4个燕麦品种在盐渍土上的出苗及苗期生长情况，旨在为燕麦耐盐性研究和进行耐盐燕麦资源的筛选提供理论依据。结果表明：在50～250mmol／LNaCl浓度范围内．随着盐分浓度的升高，各燕麦品种发芽率、发芽指数、活力指数均下降，其中活力指数对盐分胁迫最敏感；与V-2006、内散2号相比，M-2002和白燕6号种子发芽率、发芽指数、活力指数随盐分浓度升高下降较为缓慢。随NaCl浓度升高，燕麦萌发期间芽和根生长均下降，且对根的抑制作用大于芽。50～100mmol／LNaCl对燕麦根数有一定的增加作用，当NaCl浓度达150mmol／L以上时，各燕麦品种的根数在NaCl胁迫下开始下降。在盐渍土上，4个燕麦品种出苗率和苗期干质量差异显著，其中M-2002和白燕6号出苗率和干质量显著高于V-2006和内散2号。
Culture and field experiments were individually used to study the effect of 50-250 mmol/L NaCl stress on the seed germination and the condition of emergence and seedling growth for oats varie- ties, in order to supply the theoretic basic for the evaluation and selection of salt tolerance in oat germplasm resources. The results indicated that the germination percentage, germination index and vigor index decreased greatly with the increase of salt concentration under 50 - 250 mmol/L NaCl stress, in which the vigor index was most sensitive to salt stress. The germination percentage, germination index and vigor index of M-2002 and Baiyan No. 6 decreased more slowly with the increase of salt concentration compared with the V-2006 and Neisan No. 2. NaCl stress inhibited both the growth of roots and sprouts during the germination stage of oats, and the inhibition effect to roots was greater than that to sprouts. The root amount of oat was promoted under 50-100 mmol/L NaCl concentration, but it was decreased when NaCI concentration over 150 mmol/L. The emergence percentage and dry matter amount in 4 oats varieties seedling had significant difference, in which the emergence percentage and dry matter amount of M-2002 and Baiyan 6 significantly higher than the V-2006 and Neisan 2.
出处
《草业科学》
CAS
CSCD
北大核心
2009年第7期77-81,共5页
Pratacultural Science
基金
河南省农业综合开发重点项目(30200141)
关键词
燕麦
盐胁迫
发芽率
发芽指数
活力指数
出苗
oats
salt stress
germination percentage
germination index
vigor index
emergence
