漂浮育苗时添加吲哚丁酸对云烟87生长及品质的影响

Effects of Adding Indole Butyric Acid in Float System on Growth Development and Quality of Tobacco Vatiety Yunyan87

摘要: 在烟苗漂浮育苗时分两次不同时间添加吲哚丁酸，并测定烟苗的生长状况、不同生育期的农艺性状、生理特性和烤后烟叶的常规化学成分。研究结果表明，与对照对比，在漂浮育苗过程中分两次施用吲哚丁酸处理(第一次在烟苗处于小十字期时，施用浓度为0.5 mg/L；第二次施用在烟苗移栽前7天施用，浓度为1 mg/L)，烟苗根系活力提高了32.5 μg/g•h，打顶后株高达到115 cm，有效叶片数增加了3片左右，烤后烟叶水溶性总糖提高了1.2%左右，同时提高了钾离子含量，降低淀粉含量，烟碱略有升高。总体上，漂浮育苗时添加吲哚丁酸处理，促进了烟株的生长，同时烤后烟叶的内在化学成分比例也更加协调，提高了烟叶品质。

Abstract: Indole butyric acid was added at two different times in the process of seedling-floating system, and the agronomic traits, physiological characteristics and conventional chemical composition of tobacco leaves were measured. The results showed that, compared with the control treatment, the root activity were increased by 32.5 μg/g∙h, the plant height reached 115 cm after topping, the number of effective leaves were increased by 3 pieces, the content of total sugar of the tobacco leaves after baking were increased by 1.2%, the nicotine content and potassium content were increased, and the starch content were reduced at the treatment of adding indole butyric acid applied twice in the process of seedling-floating system (The first applied concentration was 0.5 mg/L when the tobacco was in the small-cross period; The second applied concentration was 1.0 mg/L when the tobacco was ready to transplant after 7 days). In general, the treatment of adding indole butyric acid in Float System promoted the growth of the tobacco plant, and the proportion of the chemical composition of the tobacco leaves was also more harmonious and the quality of the tobacco leaves was improved.