Promote Tobacco Rooting and Cultivate Robust Seedlings
隐藏域元素占位
Promote Tobacco Rooting and Cultivate Robust Seedlings
Application of Regulators to Promote Rooting and Cultivate Robust Tobacco Seedlings
Polyamine
Two exogenous polyamines [putrescine (Put) and spermidine (Spd)] with different concentrations (0.88mg/L, 8.8mg/L and 88mg/L) were used to soak the seeds of tobacco "MSk326" and "Safflower daphne". "Jinyuan" seeds, indicating that the appropriate concentration of polyamine soaking treatment can enhance the cold tolerance of seedlings, and under low temperature stress, the germination rate, germination index, total seedling length and dry weight of tobacco seeds treated with exogenous Put pelleting were improved. , which is beneficial to enhance the ability of tobacco seedlings to resist low temperature adversity. Among them, pelletizing treatment with 8.8mg/LPut seed soaking for 48h had the best effect.
Brassinolide
Foliar spraying or root dipping of seedlings with 0.01mg/L or 0.05mg/L brassinolide could increase the root wound flow, increase the content of indole acetic acid in the wound flow, and reduce the content of abscisic acid. It increases the content of P2O5, reducing sugar, ATP and free amino acids, and increases the activity of nitrate reductase in roots, thereby improving root vitality and promoting root growth.
Naphthalene ethyl indium
The roots can be soaked with 50mg/L liquid medicine for 12h before transplantation, which can promote root development and increase root weight. It can also be sprayed with 10mg/L liquid medicine 7d before transplanting and after transplanting, which can promote root development more effectively, increase the number of roots and root weight by nearly 1 times compared with the control, and increase the yield by 8.4%. The proportion of smoke increased by 18.7%.
Uniconazole
After the first leaf cutting of the tobacco seedlings, spraying dinoconazole at a concentration of 100 mg/L can effectively control the growth of tobacco seedlings, increase the relative content of chlorophyll in the stem circumference and leaves, reduce the number of leaf cuttings, increase the root-to-shoot ratio, and improve the tobacco seedlings. Seedling quality, cultivate disease-free and robust tobacco seedlings.
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