Abstract:

The effect of soil character on nitrogen mineralization of the tobacco soil by pot culture in greenhouse. The results showed that the nitrogen mineralization accumulation is remarkably different between the different soil types and the different tobacco grows stages. And the nitrogen mineralization rate are divided into three types during the tobacco growth stages: the from high to low type、from high to high type and from low to high type, there are clay and sandy soil in the from high to low type, which is benefical to form the quality of tobacco; But when the nitrogen mineralization rate from low to high, which is extremely harmful to the tobacco quality formation. It is second significant correlation between the nitrogen mineralization accumulation and the soil grain composition, especially to the coarse sand (1-0.25mm) and the clay soil (<0.001mm) during the tobacco growth stage. It is better to the tobacco fields and quality formation when the soil composition with fine clay (<0.001mm) under 37.0%、coarse silt(0.05～0.01mm) composition with 5.5% to 16.3%、coarse sand (1～0.25mm) with below 8.5%.