Abstract: The effect of soil pH value on the mineral nutrient absorption and accumulation of tabacco was stud- ied by the method of nutrient solution culture. The results showed that,under the consistant condition of nutrient so- lution component and concentration,the tobacco biomass varied in a shape of parabola with the nutrient solution pH value changes from 4.5 to 8.5,and reached the peak value at pH 6.5. The N content in whole plant and leaves of tobacco also changed in parabola with the increase of nutrient solution pH value, and got a Min-peak value at pH 7.5. The P,Zn,Cu and Mn contents in plant and leaves decreased with the increase of solution pH value,but the K, Ca, and Mg contents increased with the pH value rising. The accumulation amount in plant and leaves of N, P, K, Ca,Mg,Zn,Cu all varied in a shape of parabola with the pH value increased and got a peak value at pH 5.5 -6.5, while the accumulation amount of Mn decreased with the increase of pH value,presenting a negative correlation. So, appropriate nutrient solution pH value could promote tobacco dry matter weight accumulation and affect the mineral adsorption and accumulation in tobacco,and affect tobacco leaves yield and quality.

Key words: Tobacco pH value, Nutrient solution, Mineral nutrient, Content, Accumulation

CLC Number: 

• S181.01