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为了科学、准确地评价披碱草属牧草苗期的耐盐性,试验设0(对照)、0.4%、0.8%、1.2%4个土壤盐浓度水平,测定不同盐浓度胁迫下4种披碱草属牧草(肥披碱草、披碱草、垂穗披碱草、老芒麦)的过氧化氢酶、过氧化物酶活性以及游离脯氨酸、丙二醛含量的变化,在此基础上采用隶属函数法对牧草的耐盐性进行排序。结果表明:盐浓度在0～≤0.8%时,参试牧草的过氧化氢酶、过氧化物酶活性呈明显上升趋势,但牧草对盐胁迫的响应有较大差异,随着盐浓度的升高,游离脯氨酸、丙二醛含量均呈上升趋势,4种牧草的耐盐性披碱草﹥老芒麦﹥肥披碱草﹥垂穗披碱草。
In order to scientifically and accurately evaluate the salt tolerance of Elymus herbage at seedling stage, four soil salt concentrations (0 (control), 0.4%, 0.8%, 1.2% Based on the changes of catalase, peroxidase activity, free proline and malondialdehyde content in forage grass (Elymus fortunei, Elymus herb, Elymus nutans, Siberian barley) Membership function was used to rank the salt tolerance of herbage. The results showed that the activities of catalase and peroxidase in the tested herbage increased obviously when the salt concentration was 0 ~ ≤0.8%, but the responses of the herbage to salt stress were quite different. With the increase of salt concentration High, free proline, malondialdehyde content showed an upward trend, the four kinds of pasture salt tolerance Elymus> E>; Elymus> Elymus Eustoma.