草业科学2017，Vol.34Issue(7)：1442-1451,10.DOI:10.11829/j.issn.1001-0629.2016-0411
不同盐浓度下硅对高羊茅苗期生长及光合特征的影响
Effect of silicon supply on growth and photosynthetic characteristics of tall fescue seedlings under different salt concentrations conditions
摘要
Abstract
Tall fescue(Festuca arundinacea) frequently grows in saline soil, or in soil with a high potential for salinization due to long-term and frequent irrigation.A pot experiment was conducted to investigate the effect of Si on seed germination, biomass, and photosynthetic characteristics in stage two tall fescue seedlings under different salinization conditions.The results showed that seed germination, biomass, and photosynthetic characteristics of the seedlings was significantly affected by salt concentration, variety, silicon supply, interactions between salinization conditions and species, and interactions between silicon supply and salt concentrations.The seedling rate, the seedling survival rate, biomass, photosynthetic rate (Pn), transpiration rate (Tr), stomatal conductance (Gs), and stomatal limitation percentage (Ls) of K31 and XD tended to decrease with increase in salinity.Intercellular CO2 concentration (Ci) tended to increase with increase in salinity.Silicon significantly increased the seedling rate of XD and K31 and seedling survival rate and seedling biomass.Pn, Gs, and Ls decreased Ci and Tr under salinization conditions (P<0.05).The sensitivity of XD and K31 to silicon differed under the same salinization conditions.This indicated that the effects of silicon supply on tall fescue growth in saline conditions are closely related to resistance.关键词
高羊茅/盐浓度/硅/种子发芽/生物量/光合特性Key words
tall fescue/salinization conditions/silicon/seed germination/biomass/photosynthetic characteristics分类
农业科技引用本文复制引用
林丽果,宋锐,林选栋,蒋勇斌,刘慧霞..不同盐浓度下硅对高羊茅苗期生长及光合特征的影响[J].草业科学,2017,34(7):1442-1451,10.基金项目
国家自然科学基金项目——硅提高高羊茅耐盐性的生理生态机制研究(31360581) （31360581）
中央高校基本科研业务费项目(31920170031) （31920170031）
西北民族大学研究生科研创新项目(Yxm2015204) （Yxm2015204）
西北民族大学本科生众创空间项目 （）
西北民族大学创新团队计划项目 （）
