生物质炭替代草炭对漂浮育苗烟苗生长的影响

研究不同来源生物质炭替代烤烟漂浮育苗基质草炭对烟苗生长的影响。结果表明,50%玉米秸秆炭替代草炭后,烟苗各时期生长较好,出苗率、成苗率分别达91.4%、97.5%,显著高于其它处理；茎高、茎围、各部分生物量以及根冠比均处于较高水平。相比较而言,70%烟杆炭替代草炭处理烟苗生长有延滞现象,各指标明显低于其它处理。综上所述,玉米秸秆炭在替代草炭成为烟草漂浮育苗基质方面更具潜力,烟杆炭对烟苗生长的促进作用弱于玉米秸秆炭,甚至出现生长延滞现象。

Effect of biochar substituting for peat on flue-cured tobacco growth

The effect of biochar with different sources substituting for peat on tobacco seedling growth. Results showed that tobacco seedling at each stage growed well in the treatment of 50% maize straw-derived biochar substituting for peat. The rates of tobacco emergence and seedling were significantly higher than those in other treatments, which were up to 91.4%, 97.5%, respectively. Additionally, the indices including stem height, stem girth, biomass of each part as well as root shoot ratio were in higher level. By contrast, the growth of tobacco seedling was delayed in the treatment of 70% tobacco stalk-derived biochar substituting for peat, with each index obviously lower than other treatments. In conclusion, the maize straw-derived biochar has the potential to be the floating seedling substrate substituting for peat. The improvement of tobacco stalk-derived biochar was weaker than maize straw-derived biochar, which even retarded tobacco growth.