中文摘要：

利用不同强度磁场处理马尾松种子，研究马尾松种子活力及其POD、SOD活性的变化。结果发现：中等活力的马尾松种子经0．2T或0．3T磁场处理10min或15min，发芽率明显提高，尤以0．3T处理15min最为明显．发芽率提高到83％。这些处理条件对高活力马尾松种子的发芽率没有显著影响，但经0．3T磁场处理15min后种子的发芽势由32％提高到46％。此外，随着处理时间的延长，中等活力和高活力种子过氧化物酶活性均逐渐增强。中等活力种子经0．3T磁场处理15min，过氧化物酶活性比对照几乎增加了一倍，高活力种子过氧化物酶活性比对照增加了74％。磁场处理使中等活力马尾松种子超氧化物歧化酶活性由0．20（U／（g·min））提高到0．79U／（g·min）．却降低了高活力种子超氧化．物歧化．窿的活性。

英文摘要：

This paper dealt with the seed quality changes of Pinus massoniana treated by different magnetic intensity. The results showed the germination rate of mid-vigorous seeds increased greatly under 0.2 T and 0. 3 T magnetic intensity for 10 min or 15 rain, especially under 0.3 T for 15 min, the germination rate was raised from 66% to 83%. To highvigorous seeds with 83% germination rate, the germination rate had any fewer changes after treating with the same intensity of magnetic field. However, seed vigor was still improved. In addition, POD activity increased with treating time under magnetic field intensity above. POD activity of mid-vigorous seeds increased 100% nearly treated for 15 min under 0.3 T magnetic field intensity, and POD activity of high-vigorous seeds increased 74% also. On the other hand, SOD activity of mid-vigorous seeds was improved greatly from 0.20 U/（ g · min） to 0. 79 U/（ g · min）. In contrast, SOD activity of high-vigorous seeds was cut down.