打顶时间对亚麻抗倒与产量的影响

研究了首次打顶时间为现蕾当天、现蕾后第5天、第10天、第15天、第20天(第2次打顶时间在首次打顶后7 d,共打顶2次)5个处理对亚麻抗倒及产量品质的影响.结果表明:从现蕾当天到现蕾后20 d,随打顶时间推移,田间倒伏率相应增加,从4.5%上升到26.5%,麻株直立株率从90.5%减少到65.5%;株高和工艺长度从70.5 cm增加到80.5 cm,而茎粗从0.262 cm减少到0.240 cm;原茎产量除现蕾后5和10 d打顶处理减幅(4.45%～5.64%)不明显外,其他处理较对照均显著减少;打顶处理后亚麻纤维品质都有所改善,单纤维强力增强19.72%～34.25%,纤维分裂度增长2.24%～5.88%;从田间倒伏和产量品质综合考虑,亚麻生育后期以现蕾后5～10d打顶较理想.

Effect of decapitation time on anti-lodging and yield within flax plant

Effect of five decapitation treatment of the first topping time for the bud of the day, after squaring 5 d, 10 d, 15 d, 20 d. were studied on flax anti-lodging, yield and quality . The results showed that from the budding stage to the day after budding 20 d, with the topping over time, the field lodging rate increased from 4.5% to 26.5% and lodging degree aggravated appropriately, while its vertical hemp plants reduced from 90.5% to 65.5%; its height and process length increased from 70.5 cm to 80.5 cm and stem diameter decreased from 0.262 cm to 0.240 cm. Stem yield of budding 5 d and 10 d after decapitation treatment reduction (4.45% - 5.64%) had no obvious change, but other treatment reduced significantly compared with control. The fiber quality of topping treatment in different time was improved; its single fiber strength reinforced 19.72% - 34.25% and the degree of fiber splitting increased 2.24% - 5.88%. Therefore, from the field lodging and the yield into account, the optimum decapitation time treatment should be 5 - 10 d after budding at the later growth stage.