盐胁迫对油葵生理生化指标和产量影响的研究

Influence of Salt Stress on Physiological and Biochemical Characters and Outputs of Helianthus annuus L.

为探索生物改良盐碱地的有效办法,选择具有较强抗盐碱能力的油用向日葵作为研究对象,采用甘肃省永登县秦王川盆地的盐碱土为基础对照,设计了12种(含对照)不同土壤盐含量的处理,开展盆栽试验,并测定苗期和现蕾期叶片中丙二醛和膜透性、株高、叶面积以及收获时的经济产量和生物产量。结果显示,丙二醛、膜透性可以反映油葵受盐胁迫的生理状况,株高、叶面积可以作为油葵植株受盐胁迫时反映产量的指标。油葵耐盐能力强,可以在土壤盐含量小于8.5g/kg的环境中生长。但土壤中盐含量大于5.5g/kg,产量下降显著。

The present study aimed to investigate effective methods of biological improvement on saline-alkali soils.12 different treatments of soil salt contents including the control of the saline-alkali soils in Qinwangchuan basin Yongdeng County of Gansu Province were designed in pot experiments,using oil-sunflower（Helianthus annuus L.） that has strong salt resistance.Contents of malondialdehyde（MDA） and conductivity of leaves at seedling and buding stages,plant height,leaf area and economic yield and biomass at harvest stage of oil-sunflower were measured.The results showed that the MDA and membrane permeability might reflect the physiological conditions of oil-sunflower after salt stress.Plant height and leaf area of oil-sunflower might also be taken as the indicators when the oil-sunflower under the salt stress.Oil-sunflower had the strong salt tolerance ability,which could grow in the soils of less than 8.5g/kg of salt content,but the yield decreased significantly when the salt content was greater than the 5.5g/kg.