To explore the application of carbon in soil micro-ecological environment and growth offlue-cured tobacco in Xiangxi Autonomous Prefecture under deep tillage conditions,cloud87was used as the test material,under the condition of30cm of tillage depth,a comparison was made among the treatments of3000kg/hm^2(T1),3750kg/hm^2(T2)and4500kg/hm^2(T3)and non-application of biological carbon(CK).The dynamic changes of root vigor,leaf SPAD value and soil microbial quantity in the3growth periods of flue-cured tobacco were studied under the condition of deep tillage.The results were as follows.(1)The application of bio-carbon under the condition of deep tillage could promote the growth of the root system of flue-cured tobacco,and the root vigor in the fast growth period and the mature period in T2was the highest,and significantly higher than that of the control.(2)The application of bio-carbon could improve the SPAD value of leaf in the fast growth period and the mature period,and then thus promoting the photosynthesis of tobacco leaf and prolonging the maturity of tobacco leaf.(3)The amount of soil microorganism could be increased by using biochar,among the treatments the number of soil bacteria of T2in the rosette period and the fast growth period,and the number of fungi in the rosette period and the mature period were significantly larger than those of the CK.The dosage of3750kg/hm^2(T2)of biological carbon application had the best effect.
Acta Agriculturae Universitis Jiangxiensis