晚秋刈割对不同秋眠类型苜蓿根系丙二醛含量的影响

Activity Variation of MDA in Roots by Later Autumn Cutting in Alfalfa

对3种不同秋眠类型9个苜蓿品种进行晚秋的最后一次刈割试验,研究不同刈割时间对苜蓿根系丙二醛含量的影响。结果表明,在9月10日刈割的不同秋眠类型的苜蓿根系丙二醛含量一直处于下降的趋势;9月20日、9月30日和10月10日刈割的苜蓿根系丙二醛含量都经历了下降-上升-下降的趋势,都在翌年3月下旬达到最大值;对照中,不同刈割时间苜蓿根系丙二醛含量分别在10月20日和翌年3月下旬达到最大值,说明在10月20日左右,晚秋温度的变化对于苜蓿的伤害相对较大,同时在翌年返青时,丙二醛含量增加,可能与苜蓿返青存在一定的关系。

An experiment was conducted about MDA dynamics of the last autumn cutting on alfalfa to different fall dormancy. The results showed that there was a reduction to MDA for different category alfalfa on Sep10th. There was a trend like reduction-increase- reduction in different dormancy alfalfa on Sep20th, Sep30th and Oct20th with the highest in next later March. There were two summites in different dormancy alfalfa on Oct20th and next later March, and it showed that the temperature change in later autumn led to the injury and the relationship between alfalfa regreen up in the next March because of a summit.