不同规格育苗盘对烟苗素质及主要生理特性的影响

为进一步提高井窖式移栽烟苗的素质，研究不同规格育苗盘(T1～T5处理)对烟苗素质及主要生理特性的影响。结果表明，与T1处理相比，有气孔的育苗盘(T2～T4处理)可使基质温度早晨升温快、日变幅减小，促进根系的生长发育，提高烟苗素质，根系总长、根体积、整株干重和根冠比分别提高58.05cm、0.05cm³、0.21g和0.04；过氧化氢酶和超氧化物歧化酶活性分别提高3.12和22.29U/mg，可溶性蛋白和叶绿素含量没有显著性差异，过氧化物酶活性略低，烟苗抗逆能力增强；出苗整齐，成苗率达90.83%。不同规格新型育苗盘中，T2处理整体植株表现矮小，T4与T5处理育苗孔较少，育苗成本高。综合来看，T3处理培育烟苗素质较好，适于生产应用。

Effects of Different Specifications of Seedling Trays on Quality and Main Physiological Characteristics of Tobacco Seedlings

In order to improve the quality of transplanted tobacco seedlings in pits, the effects of different seedlings trays (T1-T5 treatments) on the quality and main physiological characteristics of tobacco seedlings were studied. The results showed that, compared with T1 treatment, the seedling trays with stomata (T2-T4 treatments) could make the substrate temperature increase rapidly in the morning and weaken the daily variation, promote the growth and development of roots, improve the quality of tobacco seedlings; the total root length and root volume, whole plant dry weight and root-shoot ratio were increased by 58.05cm, 0.05cm³, 0.21g and 0.04, respectively; catalase and superoxide dismutase activities were increased by 3.12 and 22.29U/mg, respectively; the contents of soluble protein and chlorophyll were not significantly different; the activity of peroxidase was slightly lower, and the stress resistance of tobacco seedlings was enhanced. The plant of T2 treatment was short in different specifications of new seedling trays, while T4 and T5 treatments had fewer seedling holes and high seedling cost. In summary, T3 treatment of tobacco seedlings quality is good, suitable for production and application.