不同微生物菌剂对烤烟漂浮育苗生长和养分吸收的影响

Effects of Different Microbial Agents on the Growth and Nutrient Absorption of Flue-cured Tobacco Floating Seedlings

重庆烟区烟苗培育期间往往会遇到阴雨低温天气,使得烟苗素质变弱,不利于大田烤烟的正常生长。采用漂浮育苗试验研究了不同微生物菌剂对烤烟漂浮育苗生长及养分吸收的影响。结果表明:当喷施1次时,ZF、JG处理对于提高烤烟漂浮育苗株高、茎围、最大叶长、叶茎根干重、叶片氮磷钾养分吸收、根系活力、总根长、根表面积、根直径和根体积均有显著促进作用,且以JG处理最佳;当喷施2次时,仅有JG处理对于提高烤烟漂浮育苗株高、茎围、最大叶长、叶茎根干重、叶片氮磷钾养分吸收、根系活力均有显著促进作用,而ZY处理对烤烟漂浮育苗外观长势、叶和茎干重、叶片氮磷钾养分吸收、根系活力均有显著抑制作用。因此,建议重庆烤烟漂浮育苗中喷施1次JG微生物菌剂可促进烟苗地上地下生长,以提高烟苗素质。

Rainy and low temperature weather was often encountered during the period of the cultivation of flue-cured tobacco seedlings in Chongqing.Therefore,it weakens the quality of flue-cured tobacco seedlings and is not conducive to normal growth of flue-cured tobacco in the field.In this study,floating seedling experiments were conducted to studied the effects of different microbial agents on the growth and nutrient absorption of flue-cured tobacco floating seedlings.The results showed that,when they were sprayed once,ZF and JG treatments could significantly promote plant height,stem circumference,maximum leaf length,dry weight of leaf,stem and root,the absorption of nitrogen,phosphorus,and potassium in leaves,root vitality,total root length,root surface area,root diameter,and root volume of flue-cured tobacco floating seedlings.The promoting effects on above indexes of JG treatment were the most significant.When they were sprayed twice,only JG treatment significantly promoted plant height,stem circumference,maximum leaf length,dry weight of leaf,stem and root,absorption of nitrogen,phosphorus and potassium in leaves,and root vitality of flue-cured tobacco floating seedlings.However,ZY treatment significantly inhibited the appearance,dry weight of leaf and stem,absorption of nitrogen,phosphorus and potassium nutrients in leaves,and root vitality of flue-cured tobacco floating seedlings,when it was sprayed twice.Therefore,it is recommended to spray JG microbial agent once in the cultivation of flue-cured tobacco seedlings to promote the aboveground and underground growth of seedlings and improve their quality in Chongqing.