Abstract: Various seed coatings were used to investigate the effect of seed coatings on seed germination,seedling growth and development of wheat as well as maize.Several seed coatings have been reported to control Head smut and Powder mildew in wheat and maize.However,little was known about seed coating of oats.In this experiment,Avena sativa and Avena nuda were treated with five different seed coatings using three different concentrations each.Effects of different seed coatings with different concentrations were studied according to the ratio of seeds germination,plant height,plant dry weight,SPAD value,the first real leaf area and root activity.Results indicated that seed coating mainly affected plant height,plant dry weight and root system activity.Avena sativa and Avena nuda had different responses to the different concentrations of each seed coating.The suitable ratio of seed coating to Avena sativa was 1 to 20 for all treatments.For Avena nuda,the suitable ratio was 1:40 except Vitavax with 1 to 30.The comprehensive evaluation by grey system theory showed that Vitavax was the best seed coating for Avena sativa L.followed by Kexizuo,Duoketong was the worst.Vitavax was the most effective for Avena nuda L.,followed by Tebuconazole,Duoketong was the least effective.

Key words: Seed coating, Oat, Seedling growth, Root activity

摘要： 以皮燕麦(Avena sativa)和裸燕麦(Avena nuda)为材料,用5种不同种衣剂各3个药种比梯度对燕麦种子进行包衣试验,研究不同种衣剂和同一种衣剂不同拌种浓度对燕麦出苗率、株高、单株干重、SPAD值、第一真叶面积以及根系活力的影响,从而可以筛选出适宜拌种燕麦的种衣剂类型、探讨拌种的适宜浓度,为燕麦种衣剂的利用提供参考。结果表明:株高、单株干重和根系活力受种衣剂影响最大,皮、裸燕麦对种衣剂及其拌种浓度的反应有很大不同;对皮燕麦而言,药种比1:20是最佳处理;对裸燕麦而言,除卫福外,其他种衣剂药种比1:40为最佳配比,卫福1:30为最佳配比。利用灰色系统理论对种衣剂进行综合评价可知,对皮燕麦而言,卫福为最佳种衣剂,其次是克烯唑,多克酮最差;对裸燕麦而言,卫福伴种效果最佳,其次为戊唑醇,多克酮效果最差。

关键词: 种衣剂, 燕麦, 苗期生长, 根系活力