生物炭用量对植烟土壤碳库及烤后烟叶质量的影响

Effect of biochar application rate on quality of flue-cured tobacco leaves and carbon pool in tobacco growing soil

以云烟97为研究对象,通过大田试验,于2013年在陕西汉中研究了花生壳生物炭不同用量对植烟土壤碳库及烤后烟叶品质的影响。结果表明:(1)添加生物炭提高了植烟土壤全碳、易氧化活性有机碳、可溶性有机碳、有机碳矿化速率、土壤碳库活度、碳库活度指数和土壤碳库管理指数。(2)添加生物炭增加了烤后烟叶中Nic、K+和Cl-的含量,其含量随着生物炭用量的增加而增加,适量添加生物炭可以改善烤后烟叶单料烟评吸质量。(3)以常规施肥配施生物炭用量600kg/hm2的处理效果最好。(4)过量的生物炭可能会对烤后烟叶品质造成负面影响,需进一步开展增施生物炭配减氮肥技术研究。

Field experiment was carried out to study the effect of peanut-shell-biochar amount on quality of flue-cured tobacco leaves and carbon pool in tobacco growing soil in 2013 in Hanzhong municipality of Shaanxi province. The variety tested was Yunyan97. Results showed that：（1）Adding biochar could increase soil total carbon, readily oxidizable active organic carbon, dissolved organic carbon, organic carbon mineralization rate, soil carbon activity, soil carbon activity index and soil carbon pool management index.（2）Adding biochar could increase Nic, K^＋ and Cl^- content of cured leaves and their contents increased with the increase of biochar amount. Adding appropriate amount of biochar could improve sensory quality of cured-leaves.（3） Conventional fertilization with biochar amount of 600kg/hm2 rendered the best effect.（4）Excess amount of biochar could cause negative influence on flue-cured tobacco leaves and further research about increasing application of biochar with reduced nitrogen fertilizer technology need to be carried out.