【摘要】 以不同年份收获的燕麦(Avena sativa)种子(Lot2004,Lot2007,Lot2008)为试验材料,采用标准发芽、快速发芽、电导率测定、甲醇劣变处理和人工老化处理方法,对燕麦种子活力进行测定。同时进行了田间种植出苗试验,测定不同储藏年限种子的田间出苗率及田间出苗时间,并分析各室内测定指标与田间出苗率及田间出苗时间的相关性。结果表明,甲醇劣变处理、人工老化处理、标准发芽测定与田间出苗率的相关性均不显著(P>0.05),而平均发芽时间MJGT(胚根伸出种皮)和MGT(胚根至少2mm)与田间出苗率显著相关(P<0.05),可以较好预测种子批的田间出苗情况。更多还原

【Abstract】 In this study,three seed lots were harvested in 2004,2007 and 2008(Lot2004,Lot2007,Lot2008),and the seed vigor was measured by different methods including standard germination,rapid germination,conductivity measurement,methanol deterioration treatment and artificial aging treatment.The germination rates were Lot2007>Lot2004>Lot2008.Lot2004 and Lot2007 had no significant differences in seed germination percentage(P>0.05),and the corresponding meant just germination time(MJGT) and germination time(MGT) showed a similar rank.Average germination time of Lot2008 was significantly longer than other samples(P<0.01).However,ranks measured by artificial accelerated aging and field emergence were different.Seeds with long storage time had long emergence time,and their field emergence rates declined rapidly after aging.After 0 h,0.5 h,1.0 h,1.5 h,2.0 h methanol soaking,seed germination rate increased with the decreasing of immersion time.However,the percentage of normal seedling after 1.5 h methanol soaking was more than those of after 1.0 h soaking.In addition,there was no correlation among measurements of methanol deterioration treatment,artificial aging treatment,and standard germination and field germination rate.While MJGT and MGT were significantly correlated with field emergence rate,so MJGT and MGT were suggested as predictors of emergence of seed lots in field.更多还原