5 What kind of Toona sinensis is easy to be poisoned? Nitrite in the bud of old Toona sinensis will increase with the extension of production time. The content of nitrate and nitrite in the newly grown Toona sinensis bud is very low, but with the growth of Toona sinensis bud age, the content of nitrate and nitrite is higher and higher, which is easy to be poisoned.

The content of nitrate and nitrite in Toona sinensis buds stored for a long time is not very high even if it is fresh and tender, but after long-term storage, the content of nitrite will increase with time, so it is easy to be poisoned by eating Toona sinensis buds stored for a long time.