种用玉米发芽率衰退因素的分析

本研究测定了7个玉米品种的种子发芽率、含水量、贮藏真菌、田间真菌、内部损伤、机械损伤和千粒重,对资料进行了通径分析。结果表明,贮藏真菌及种子含水量是影响种子发芽力衰退的最重要因素,二者对发芽力都有很大的、直接和间接的负作用。种子含水量通过贮藏真菌对发芽力的间接负作用大于其直接作用。田间真菌、机械损伤、内

Analysis of Factors Causing Germination Deterioration in Corn Seeds

Germination,moisture content,storage fungi,field fungi,internal damage,physicaldamage and 1000 seed weight of corn seed lots of 7 varieties were tested and pathcoefficient analysis was performed.The results showed that storage fungi and moisturecontent played important roles in affecting the seed germination.Both factors had strongnegative effects,direct and indirect,on seed germination.The indirect effect of moisturecontent,through its influence on the development of storage fungi,was bigger than the di-rect effect.Field fungi,physical damage,internal damage and 1000 seed weight were notas important as storage fungi and moisture content in terms of affecting the germinationability.