摘要
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％。
The effects of ground plastic-covering on tobacco's growth,development and nutrient! absorption were dissussed! at different coverng periods on this test.The results sho wed,plastic-covering is helpful to the growth of cultivated tobacco leaf's area.The accumulation of dried matter in the stems was promoted when ground plastics were covered and the daily accumulation peak in dried matter appears.d ten days earliter.And the early nutrient absorption by to bacco was also promoted. But the conteats of leaf chlorophyll were decreased in the mature period.The quality of tobaco leaf was improved.Percentage of prime tobaccl leaf was increased by 4-7 percent at taking off the plasties in the middle period and contents of nicotine were improved obviousli.
关键词
地膜覆盖
烟草
生长发育
烟叶
品质
养分吸收
Ground plastic-covering,Gronth and development of tobacco,Quality of tobacco leaf
