论文部分内容阅读
采用土培试验研究了 4个不同耐铝性的小麦基因型在酸性高铝土壤中的适应性及其与体内养分状况的关系 .结果表明 ,酸性高铝条件明显抑制小麦的生长 ,但耐铝基因型的株高、地上部干重和籽粒产量均显著高于敏感基因型 ,表现出对酸性铝毒土壤较强的适应性 .低 p H高铝处理降低了小麦地上部氮、钾、钙、磷和锌的含量 ,提高了铝含量 ,对镁、铁和锰含量则无明显的影响 ,但耐铝基因型植株地上部比铝敏感基因型有较高的氮、钾、钙和磷含量及较低的铝含量 .耐铝基因型对酸性铝毒土壤的适应性强可能与其在低 p H高铝条件下维持较高的钙、磷含量 ,较低的铝含量以及较高的 Ca/ Al,P/ Al和 K/ Al比值有关
The adaptability of four wheat cultivars with different Al tolerance in acidic high-alumina soils and their relationship with nutrient status were studied by soil culture experiments.The results showed that the condition of acidic high-aluminum significantly inhibited the growth of wheat, The plant height, shoot dry weight and grain yield of genotypes were significantly higher than those of susceptible genotypes, showing strong adaptability to acid aluminum toxic soil.The treatment with low p H and high aluminum reduced the contents of nitrogen, potassium and calcium , Phosphorus and zinc, and increased the content of aluminum, but had no significant effect on the content of magnesium, iron and manganese. However, the aboveground parts of Al-tolerant genotype plants had higher contents of nitrogen, potassium, calcium and phosphorus than those of aluminum-sensitive genotypes And lower aluminum content.The adaptability of aluminum tolerant genotypes to acidic aluminum soils may be related to their high calcium and phosphorus content, low aluminum content and high Ca / Al, P / Al and K / Al ratio