| 马崇坚1，陈小娟1，黎华寿2.碱胁迫条件下皇竹草和玉米的适应性研究[J].广东农业科学,2018,45(1):57-63 |
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碱胁迫条件下皇竹草和玉米的适应性研究 |
| Study on the adaptability of Hybrid Giant Napier grass（ Pennisetum hydridum） and Zea mays to alkaline stress |
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| DOI：10.16768/j.issn.1004-874X.2018.01.010 |
| 中文关键词: 皇竹草 碱胁迫 抗逆性 赤泥 脯氨酸 |
| 英文关键词: Pennisetum hydridum alkaline stress stress resistance red mud proline |
| 基金项目:广东省自然科学基金（2014A030307017）; 国家自然科学基金(41073059) |
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| 摘要点击次数: 2142 |
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| 中文摘要: |
| 赤泥为强碱性铝工业废渣，其处置及综合利用问题突出，相关的植物修复机制的研究缺乏。通
过观测不同的碱性土壤中皇竹草和玉米的生长情况及生理指标差异，探究碱胁迫下皇竹草及玉米的适应性
差异及可能的机理。结果表明：植物种植后碱性土壤的pH 值显著降低，经过皇竹草60 d 的生长后，赤泥的
pH 值从9.49 下降到9.25。在不同的碱性土壤中，皇竹草的生长情况优于玉米，皇竹草的生长速率及其产量
均显著高于同等情况下的玉米，其中产量高50% 以上，表现出更强的生命力。相比于玉米而言，受到碱胁
迫后的皇竹草，均会在移栽后2 d 左右迅速产生更多的脯氨酸和可溶性糖参与抵御胁迫，表现出更强的碱
胁迫抵抗能力。因此，皇竹草能在碱性土壤下具有较强的生长及抗逆能力，可在碱性环境治理等方面推广
应用。 |
| 英文摘要: |
| Red muds are highly alkaline residuces，their disposal and reclamation，have been a worldwide
challenge due to lack of basic research. By comparing growth and physiological indicator of the Hybrid Giant Napier
grass（HGN） and Zea mays（ZM）under different alkali stress，the adaptability of HGN and possible mechanism of
alkaline tolerance in HGN and Zm had been investigated. It showed that the soil pH value could reduce after planting.
Especially，the soil pH decreased from 9.49 to 9.49 about 60 days after planting. HGN had stronger tolerance to
alkaline. The results showed HGN had a stronger vitality in the alkaline soil，and the growth characteristics，growth
rate and yield of HGN were significantly higher than ZM. Otherwise，the yield of HGN were higher than ZM up to
50%. Our results showed HGN had a higher capacity to synthesize praline and soluble sugar than Zm，both of which
were effective alkaline to leance indices，2 days after planting. Therefore，HGN is one of the most promising red muds
phytoremediation plants that have a faster growth rate under alkaline stress condition. |
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