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为探索烤烟适宜的轮作模式,完善以烤烟为主的种植制度,研究了小麦—玉米—烤烟(M1)、小麦—花生—烤烟(M2)、小麦—大豆—烤烟(M3)、小麦—芝麻—烤烟(M4)、小麦—红薯—烤烟(M5)、烤烟—大麦绿肥—烤烟(M6)、烤烟—冬闲—烤烟(M7)7种模式对烤烟前茬土壤养分、根系活力及烟叶质量的影响。结果表明,M1模式烤烟前茬土壤碱解氮含量较高(88.14 mg/kg),水溶性氯含量最高(32.08 mg/kg),烤烟根系活力较低,烟叶质量较差;M2模式碱解氮含量较高(73.17 mg/kg),速效磷含量最低(10.04 mg/kg),根系活力前期低后期高,烟叶质量最差;M3模式碱解氮含量较高(76.94 mg/kg),烤烟根系活力一般,烟叶质量较差;M4模式碱解氮含量适中(63.98 mg/kg),根系活力较高,烟叶质量中等;M5模式碱解氮含量适宜(68.70 mg/kg),速效磷含量最高(17.36 mg/kg),烟叶质量好;M6模式碱解氮含量适宜(63.20 mg/kg),根系活力较低,烟叶质量较好;M7模式碱解氮含量适宜(67.03 mg/kg),根系活力较低,烟叶质量中等。综上,M4、M5、M6为烤烟适宜的轮作模式,M7(连作年限2 a)为较适宜模式,M1、M3为较不适宜模式,M2为不适宜模式。
In order to explore suitable rotation pattern of flue-cured tobacco and improve the planting system based on flue-cured tobacco, the effects of wheat-corn-flue-cured tobacco (M1), wheat-peanut-flue-cured tobacco (M2) Effects of seven models of fumigation (M4), wheat - sweet potato - flue - cured tobacco (M5), flue - cured tobacco - barley green manure - flue - cured tobacco on the soil nutrients and root vigor and the quality of tobacco leaves. The results showed that the M1 soil had a higher content of alkali-hydrolyzable nitrogen (88.14 mg / kg), the highest content of water-soluble chlorine (32.08 mg / kg), the lower root vigor of tobacco and the poor quality of tobacco leaf. (73.17 mg / kg), the content of available phosphorus was the lowest (10.04 mg / kg), and the lowest was at the late stage of early vigor and the quality of tobacco was the worst. The content of alkaline hydrolysis nitrogen in M3 was higher (76.94 mg / kg) The results showed that the M4 model had moderate alkaline hydrolysis (63.98 mg / kg), higher root activity and medium quality tobacco leaf; M5 model had the highest content of available nitrogen (68.70 mg / kg) and the highest content of available phosphorus 17.36 mg / kg). The quality of tobacco leaf was good. The M6 mode had the highest content of alkaline hydrolysis nitrogen (63.20 mg / kg), the lower root activity and the better leaf quality. Lower, medium quality tobacco. In conclusion, M4, M5 and M6 are suitable rotation patterns for flue-cured tobacco, M7 (continuous cropping of 2 years) is the more suitable pattern, M1 and M3 are less suitable patterns and M2 is not suitable pattern.