Abstract: For exploring the effects of biochar application on flue-cured tobacco growth and the physical and chemical property of rhizosphere soil. A pot experiment was conducted to study the accumulation of tobacco leaf dry matter,rhizosphere soil properties so as: soil enzyme activity,content of soil organic matter,soil SMBC by applying different amount(70,140,210 g /20 kg) of biochar. The results showed that: The application of biochar increased the dry matter accumulation of tobacco at the middle and late growth stage,and the effect with 70 g biochar application was most obvious. Biochar inhibited the activity of soil invertase,but the inhibition decreased with the development of growth period,and at 90 days after transplanting,the activity of soil invertase with 70 g biochar application was higher than CK. Biochar can increase the activity of catalase at the late growth stage. The application of biochar significantly increased content of organic matter in the whole growth period,increased soil SMBC in the late growth stage. So,the application of biochar can significantly increased content of organic matter,modified growth environments of flue-cured tobacco,and improved its growth,low-to-mid application rate of biochar(70,140 g /20 kg) has the better effects.

Key words: Tobacco, Biochar, Rhizosphere soil, Physical and chemical property, Dry matter accumulation

CLC Number: 

• S572