Nitrogen fertilization may interfere in the quality of soybean seeds. This study aimed to determine the physiological and sanitary quality of soybean seeds, in response to levels and times of nitrogen (N) application associated with Bradyrhizobium japonicum inoculation. Treatments were arranged in a randomized block design, in a 2 × 3 × 4 factorial arrangement [two soybean cultivars (BRS 1074 IPRO and ST 797 IPRO), three application times (sowing, 30 and 50 days after emergence) and four N levels (0 kg ha-1, 20 kg ha-1, 40 kg ha-1 and 60 kg ha-1), with four replicates. The 1,000-seed mass, moisture content, germination rate, seedling height, shoot length, primary root length, total seedling dry matter, electrical conductivity, mechanical damage, vigor and viability (tetrazolium test) and sanitary quality of the seeds were measured. The use of mineral N, associated with the inoculation of B. japonicum bacteria, does not prove to be consistent, in terms of its effects on the physiological quality of soybean seeds, although the incidence of pathogens may be reduced.
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机译:氮肥可能干扰大豆种子的质量。本研究旨在确定大豆种子的生理和卫生质量,响应于与Bradyrhizobium japonicum接种相关的氮气(n)施用的水平和时间。处理以2×3×4因子安排(两个大豆品种(BRS 1074 IPRO和ST 797 IPRO),三个应用时间(出现后30天和50天)和四个水平( 0 kg ha-1,20kg ha-1,40 kg ha-1和60 kg ha-1),有四个重复。测量了1,000种含量,水分含量,萌发率,幼苗高度,芽长,初级根长,总幼苗干物质,导电性,机械损伤,活力(四唑鎓试验)和种子的卫生质。矿物N,与接种B. japonicum细菌相关的矿物N不证明其对豆生种子的生理品质的影响,尽管可能降低病原体的发生率。
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