论文部分内容阅读
本试验探讨了在不同覆盖期限地膜覆盖对烤烟生长发育和养分吸收的影响。结果表明，地膜覆盖栽培烤烟有利于烟叶叶面积的增长，促进烟株干物质积累，于物质每日积累高峰比无覆盖处理提前１０ｄ，促进烟株早期养分吸收积累，降低成熟期烟叶叶绿素含量，改善烟叶品质，中期揭膜处理对提高烟碱含量作用明显；烟叶上等烟百分数比无覆盖处理提高了４～７％。
This experiment explored the effects of plastic film mulching on the growth and nutrient uptake of flue-cured tobacco in different coverage periods. The results showed that mulching with plastic film mulching improved the leaf area of tobacco leaves and promoted the accumulation of dry matter in tobacco plants. The daily accumulation peak of the material was 10 days earlier than the non-covered treatment, which promoted the early accumulation of nutrients and decreased the chlorophyll content, Improve the quality of the tobacco leaf, and medium-term uncovering treatment has obvious effect on increasing the nicotine content; the percentage of the superior tobacco in the tobacco leaf is improved by 4 to 7% compared with no covering treatment.