| 摘要: |
| 以2年生金丝小枣嫁接苗为试材，研究了盆栽条件下硅对受盐胁迫金丝小枣生长和生理的效应。结果表明，金丝小枣在含NaCl 3.0和5.0 g/kg土壤中长期生长，给土壤施硅（0.4 g/kg）较不施硅处理的植株叶片相对含水量(RWC)分别提高7.30%和10.05%，叶片细胞质膜相对透性（PMP）分别降低234.60%和108.13%,光系统Ⅱ（PSⅡ）的潜在光化学活性（Fv/Fo）和最大光化学效率（Fv/Fm）分别提高32.25%,30.71%和11.26%,12.15%，CO2同化速率（Pn）分别提高10.31%和21.13%，枣头枝长度和叶干重分别增加87.40%,36.73%和238.16%,40.38%。这说明盐胁迫下，给土壤施硅可改善金丝小枣树的生长和生理状况。 |
| 关键词: 硅 盐胁迫 金丝小枣 光合作用 生长量 生物量 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金项目(30471368) |
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| Effects of silicon on growth and physiological status of Zizyphus jujuba cv. Jinsi-xiaozao under salt stress |
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| Abstract: |
| Effects of silicon on growth and physiological status of Zizyphus jujuba cv.Jins-xiaozao under salt stress were studied by using 2-year-grafted seedlings.Ordinary agronomic soil was selected as pot-cultured medium.Sources of sodium and silicon for experiment were sodium chloride and potassium silicate.Soil salt contents (NaCl) were planned 3 levels,i.e.0,3.0 and 5.0 g/kg.Soil silicon (Si) contents were planned 2 levels,i.e.0 and 0.4 g/kg.The experimental results showed that salt ions had distinctively negative effects on jisi-jujube plants grown in soils containing 3.0 g/kg or 5.0 g/kg NaCl for more than 6 months while silicon addition ameliorated the effects of salt stress on jisi jujube plant.Under the two salt contents,added silicon increased blade relative water content by 7.30% and 10.05% than those of no silicon addition respectively while increased the length of leading shoot and weight of dried leaves by 87.40%,36.73%,238.16% and 40.38%.Added silicon also increased Fv/Fo ratio and Fv/Fo ratio of PSⅡ by 32.25%,30.71% and 11.26%,12.15%.The gases exchange status,including photosynthetic rate (Pn) and transpiration ratio (Tr),of jisi-jujube under salt stress were also improved by added silicon.So was the leaf membrane permeability of the tree. |
| Key words: silicon salt stress Zizyphus jujuba photosynthesis growth amount biomass |
