关键词: 竹炭, T20改良剂, 皖南旱地, 烤烟, 农艺性状, 经济性状, 内在化学品质

Abstract: In order to explore the combined effects of bamboo biochar and T20 combination amendment on dryland flue-cured tobacco ecology, yield and quality at south Anhui province, this paper studied the effects of indicators of 3 different bamboo biochar amounts and T20 combination amendment  on agronomic characteristics, SPAD value, economic characters, appearance quality, smoking quality and inner chemical component of flue-cured tobacco. Results showed that the combined application of bamboo biochar and T20 could stimulate flue-cured tobacco growth and development, be beneficial for “early germination and fast growing” of flue-cured tobacco. It showed remarkable advantages especially at vigorous growing and maturing stages. During tobacco resetting and vigorous growing stages. The SPAD values of A1 and A2 adding bamboo biochar and T20 treatments were significantly higher than that of the control. The combination of bamboo biochar and T20 could increase tobacco leaf yield and optimize grading structure. The A1, A2 and A3 treatments increased the tobacco yield by 7.02%, 7.31% and 23.28%, respectively, as compared with the control. At the same time, the combination had improved the appearance and smoke panel test quality of the flue-cured tobacco. As for inner chemical components and coordination, this combination reduced the contents of nicotine, total nitrogen and protein, but the contents of reductive sugar and potassium did not increase significantly. The same situation was the nitrogen-nicotine and potassium-chlorine ratios. Results indicated the compound of bamboo biochar and T20 could improve the growth of dryland flue-cured tobacco at south Anhui province, increse its economic character and coordinate its inner chemical quality. These results also provided theoretical basis and referrences for the application of charcoal and inorganic mineral material in dryland agriculture production.

Key words: bamboo biochar, T20 amendment, dryland at south Anhui, flue-cured tobacco, agronomic characteristic, economic character, inner chemical quality