某些物种,大田出苗和标准发芽试验的相关性很小,尤其是在大田逆境条件下。活力测定能够更好地估算大田出苗率。玉米是一种大田出苗势变化很大的作物(Bekendam等,1987)。早春,欧洲和北美洲北部的天气寒冷而潮湿。在这样条件下,种子不能发芽,且可能由于土壤微生物的活动而腐 Some species, field emergence and standard germination test is very small, especially in the field conditions of adversity. Vigor determination can better estimate the emergence rate of Daejeon. Corn is a crop that shows dramatic changes in the field (Bekendam et al., 1987). In early spring, the weather in Europe and northern North America is cold and humid. Under such conditions, the seeds can not germinate and may rot due to the activity of soil microorganisms