灰色烤烟防治技术

Control technique of grey flue-cured tobacco

为了消除灰色烤烟发生,探讨了利用高墒高培土排水、调节土壤pH值、揭膜培土、配方施肥等农田管理措施对灰色烤烟的防治效果.结果表明,无论是通过高墒高培土排水改善土壤通透性、施用石灰提高土壤pH值、不盖地膜或移栽后及早揭膜高培土,还是通过配方施肥提高P素比例而降低K素比例,均能降低烟草对Fe和Mn的吸收而减少灰色烟叶的发生.在防治灰色烤烟的发生时应综合考虑以上措施.

Plot trials were carried to explore the effects of some agricultural practices on the control of grey flue-cured tobacco. The results showed that the happening of grey flue-cured tobacco was mainly due to the excessive uptake of Fe and Mn by tobacco plant. However, the agricultural practices, such as plowing high ridge in the field to improve soil drainage ability, applying lime to increase soil pH, no plastic film covering or uncovering film in season, or increasing P and decreasing K fertilizer, had obvious effect on decreasing the uptake of Fe and Mn by tobacco plant and could reduce the happening of grey flue-cured tobacco.