论文部分内容阅读
通过测定 ４ 个大麦品种幼苗在含０，１．０，３．０ ｍ ｇ／ Ｌ Ａｌ３＋ 营养液中培养不同时间后根的生长情况及不同生长时期幼苗改变营养液 ｐ Ｈ 的能力，分析各品种的耐 Ａｌ３＋ 性与诱导培养液ｐ Ｈ 改变的相关性。结果表明：各品种不同生长时期对不同浓度的 Ａｌ３＋ 敏感性不完全一致；不同生长时期诱导营养液ｐ Ｈ 改变的能力也不相同，使营养液ｐ Ｈ 变化呈阶段性升降波动，但品种的ｐ Ｈ的变化能力与耐 Ａｌ３＋ 性之间并不一定成正相关，不同品种间存在明显的差异。耐 Ａｌ３＋ 性品种能诱导营养液ｐ Ｈ 至较高的水平，但有些 Ａｌ３＋ 敏感品种也能诱导营养液ｐ Ｈ 至很高水平。不能诱导营养液出现第二次ｐ Ｈ 高峰的品种一定是 Ａｌ３＋ 敏感品种。并且根据研究结果，初步探讨了大麦耐铝酸的有关机理。
By measuring the growth of 4 barley cultivars at 0, 1.0 and 3.0 m g / L Al3 + nutrient solution at different times and the ability of seedlings at different growth stages to change p H of nutrient solution, Of Al3 + resistance and culture medium p H changes in the correlation. The results showed that the sensitivity to different concentrations of Al3 + in different growth stages was not consistent. The ability of inducing p H changes in different growth stages was also different, which caused the fluctuation of p H in the nutrient solution fluctuated in stages. However, p The change ability of H is not necessarily positively related to the resistance to Al3 +, and there are obvious differences among different varieties. Al3 + tolerant varieties can induce pH to higher levels, but some Al3 + -sensitive varieties can also induce nutrient pH up to very high levels. The species that can not induce the second p H peak in nutrient solution must be Al3 + sensitive species. According to the research results, the mechanism of barium-tolerant aluminic acid was preliminarily discussed.