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通过污染区实地测定和实验室的控制试验相结合,先后对(?)阳地区常见的几十种绿化树木叶片 pH 值及与其有关的生理性状—pH 值、等电点及酸碱缓冲量,进行了大样本的多次重复测定,并对部分数据进行了统计分析。结果表明:树木叶片的 pH 值高、对 SC_2污染抗性强。阔叶树由于比针叶树具有较高的 pH 值,而表现较强的抗性。SO_2胁迫后的叶片 pH 值变幅小,抗性强。叶片 pH 值与吸硫量之间相关不显著。在一定的 pH 值范围内.酸碱缓冲容量较大的有增强抗性的作用。叶片 pH 值与等电点的差值与抗性呈正相关。
Through the combination of contaminated area determination and laboratory control experiments, the leaf pH value of several dozens of common greening trees in the Yangyang area and their physiological traits-pH value, isoelectric point and acid-base buffer amount, A large number of repeated samples were measured, and some of the data were analyzed. The results showed that the leaves of the trees had high pH value and strong resistance to SC_2 pollution. Broad-leaved trees show strong resistance because of their higher pH value than conifers. After SO2 stress, the change of leaf pH value was small and strong. There was no significant correlation between leaf pH and sulfur uptake. In a certain pH range. Acid-base buffer capacity greater resistance to enhanced role. Leaf pH and isoelectric point difference and resistance were positively correlated.