不同草炭处理对植烟土壤理化性状及烟叶产质影响研究

The Effect of Different Peat levels on Soil Physical and Chemical Traits and Tobacco Leaf Yield and Quality

为了研究不同草炭用量对植烟土壤的理化性状,烟叶产量和品质的影响;2005年应用盆栽土培的方法进行了试验研究。结果表明增施草炭250￣2000g/株能降低土壤容重,降幅0.78%￣14.84%;提高土壤的孔隙度,增幅1.28%￣14.01%;增加土壤中有机质和氮含量,增幅分别为21.15%￣99.36%和3.80%￣35.65%。同时增施草炭能促进烟株早期的快速生长;少量增施草炭对烟叶产量提高不大,但当草炭提高到1000￣2000g/株时产量大幅提高。同时增施草炭在一定程度上改善了烟叶的品质;但增施草炭对土壤中脲酶和过氧化氢酶影响较小。总之,增施草炭能降低土壤容重,提高土壤孔隙度,增加土壤中有机质和氮含量,同时增施草炭能促进烟株生长,提高产量和改善品质。

The effect of different peat levels on soil physical and chemical traits and tobacco leaf yield and quality with pot experiment was conducted in 2005. The results showed that with the peat levels increasing from 250 to 2000g/plant, soil bulk density decreased, the decreasing range was 0.78-14.84% ;however soil bulk porosity increased and increasing range was 1.28-14.01%;soil organic matter and soil nitrogen also increased and increasing range were 21.15 -99.36% and 3.80-35.65% respectively. Also with increasing the peat levels, the tobacco grew very fast during the early stage and tobacco leaf yield improved greatly when the peat levels were at 1000-2000 g/plant, but there was little effect when the peat level was less. The results also showed that with the peat levels increasing the leaf quality was improved. There was little effect on soil urease and catalase activity for different peat levels. In general, with peat levels increasing, soil bulk density decrease and soil bulk porosity increased and so as soil organic matter and soil nitrogen, the peat also improved tobacco growth and leaf yield and quality.