Effects of seed coating and P application on tobacco growth and nutrient accumulation.

The seed coating and phosphorus application experiments were done using three tobacco varieties,including K326,Yunyan85 and Honghuadajinyuan.The results showed that the seed coating could not only improve greatly seed germination rate,but also shorten seed germination time.But seed coating treatment had no obvious effects on tobacco biomass and total root length.And tobacco seed coating had nutrients not also increased the accumulation of macro-nutrients,including nitrogen,phosphorus and potassium,in tobacco plants.Seed coating could not promote tobacco growth in the long term even though it could improve seed germination rate and shorten seed germination time in the short term.P application could not only promote tobacco growth significantly,but also increase phosphorus and potassium contents in tobacco plants,and decrease nitrogen contents.