草业学报2016，Vol.25Issue(8)：91-97,7.DOI:10.11686/cyxb2015501
不同盐生境下硅对高羊茅生物量及生理生化特征的影响
Effects of silicon supply on the biomass and physiochemical features of tall fescue seedlings under different salinization conditions
摘要
Abstract
The effect of silicon supply on the biomass and physiochemical features of tall fescue seedlings was in-vestigated under different salinization conditions using a water culture experiment.Biomass decreased as salt concentration increased,with 200 mmol/L proving to be the critical concentration for tall fescue seedlings. When salt concentration was less than 200 mmol/L,silicon addition significantly increased seedling biomass, indicating that the effectiveness of silicon on tall fescue is closely related to salt concentration.If the concentra-tion was more than 200 mmol/L,there was no significant effect of silicon addition on biomass.Under water culture,the activities of SOD,CAT and POD were increased and the contents of malondialdehyde,proline and water soluble sugars,and relative conductivity,were decreased by adding silicon to seedlings under salt stress below the critical concentration.The most significant reduction in MDA content (18.05%)was when salt con-centration was 100 mmol/L.The most significant decline in proline content (23.63%)was when salt concen-tration was 50 mmol/L.The results indicate that the adaptability to salinization of tall fescue seedlings is im-proved by adding silicon and that silicon may be directly involved in the seedlings’physiochemical processes.关键词
高羊茅/盐生境/硅/酶活性/渗透调节Key words
tall fescue/salinization conditions/silicon/enzyme activities/osmotic adjustment引用本文复制引用
宋锐,林丽果,王康英,宋浩然,蒋勇斌,刘慧霞..不同盐生境下硅对高羊茅生物量及生理生化特征的影响[J].草业学报,2016,25(8):91-97,7.基金项目
国家自然科学基金项目（31360581），中央高校基本科研业务费项目（31920130050），西北民族大学研究生科研创新项目（Yxm2014181），西北民族大学本科生众创空间项目和西北民族大学创新团队计划项目资助。 （）
