【摘要】 甜菜单粒种发芽率低的主要原因为种株叶丛形成期短，“源”器管形成弱，影响“库”器官的数量和质量造成的，通过根外追施锌肥和硼肥，再配合氮、磷、钾做种肥，提高了营养水平，协调了“源”与“库”的关系，主要生物学性状得到改善，使甜菜单粒种发芽率提高了９．１％～１０．４％。更多还原

【Abstract】 The reasons of low germination rate of monogerm sugarbeet seed were due to the leafrpsette formation stage too short,and forrmation of source orpan become weaken,all sink or-gan affected by quantity and quality.Zn and B fertilizer ap plied by top dressing and plusN、P、K as seed manure,that plane of nutrition could be improved and accordant the rela-tion between the source and sink,majou biological characters have improved also,that thegermination rate of monogerm seed have increased by 9.1%～10.4%.更多还原