不同种植方式植烟土壤养分及烟叶化学成分的差异

研究了湖南部分烤烟主产县烟稻复种连作和一年一熟连作植烟土壤养分含量和烟叶化学成分含量的差异.结果表明:烟稻复种连作,土壤pH值高于一年一熟连作,有机质、全氮、碱解氮、全磷、氯和钙的含量均显著高于一年一熟连作,全钾、速效钾含量显著低于一年一熟连作;烟叶总糖、还原糖、总氮含量均高于一年一熟连作,烟碱含量低于一年一熟连作,但差异均不显著;烟叶氯、钾含量均显著高于一年一熟连作.

Difference of soil nutrient and chemical components in tobacco leaves under different cropping patterns of flue-cured tobacco

The nutrient contents of tobacco-growing soils and chemical composition contents of tobacco leaves were compared between tobacco-rice multiple cropping in paddy field and tobacco single cropping in dry land.The results showed that the pH level and the contents of organic matter,total N,alkali-hydrolyzable N,rapidly available P,water-soluble Cl,exchangeable Ca in tobacco-growing soils of tobacco-rice multiple cropping are significant higher than that of dry land tobacco monoculture,while total K and rapidly available K are significant lower than that of dry land tobacco monoculture;The content of total sugar,reductive sugar,total nitrogen in tobacco leaves of tobacco-rice multiple cropping are higher than that of dry land tobacco monoculture,while the nicotine is lower than that of dry land tobacco monoculture,and the variance are all not significant.The contents of Cl,K in tobacco leaves of tobacco-rice multiple cropping are significantly higher than that of dry land tobacco monoculture.