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马崇坚; 陈小娟; 黎华寿
广东农业科学, 2018, Volume: 45, Issue: 1Journal Article
S152.3; 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.
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