不同种植模式对土壤酶、烤烟生长及烟叶致香成分的影响

我国烤烟连作现象严重,而烤烟连作会影响土壤健康状况,降低烟叶质量。为探究合理的烤烟种植模式,研究了烤烟连作、轮作和套作3种种植模式对烤烟主要农艺指标、土壤酶活性以及烤烟致香成分含量的影响。结果表明:连作烤烟株高较为矮小,除酸性磷酸酶活性较高外,其他土壤酶活性较低,烟叶香气质量较差;相较于烤烟连作,烤烟套作和轮作有利于烟叶生长,提高并且均衡土壤酶活性,改善烟叶香气质量;本试验条件下,甘薯和辣椒可以作为较好的烤烟套作和轮作的对象作物。

Effects of Different Cropping Patterns on Soil Enzyme,Flue-cured Tobacco Growth and Aroma Substances Content of Tobacco Leaf

In China the phenomenon of continuous flue-cured tobacco cropping is serious, which will affect the soil health condition, and reduce the quality of tobacco leaves. In order to find rational planting pattern for flue-cured tobacco, this paper studied the effects of 3 different cropping patterns: continuous cropping, rotational cropping and intercropping on the major agronomic targets, soil enzyme activity and aroma substances content of flue-cured tobacco. The results showed that with continuous cropping, tobacco had relatively short plant height, the acid phosphatase activity was higher, but the other soil enzyme activities were lower, and the aroma quality is poorer. Compared with continuous cropping, the intercropping and rotational one were favorable for tobacco leaf growth, could enhance and balance the soil enzyme activity, and improve the aroma quality of tobacco leaves. Under the same experimental conditions, sweet potato and hot pepper can serve as appropriate intercropping or rotational cropping crops for flue-cured tobacco.