光照对烤烟小棚漂浮育苗的影响

The Influence of Light Strength for Floating System of Flue-cured Seedlings

烤烟漂浮育苗是一项采用无土设施栽培原理的烤烟育苗新技术。通过两年的多次反复试验,探 讨不同光照强度对烤烟漂浮育苗培育壮苗的影响作用。结果表明:光照强度调控措施为:初期(播种至 烟苗2片真叶,棚膜上覆盖两层遮光率75％遮阳网,适宜光照4000-10000Lx);中期:烟苗2-4片真叶, 适宜光照(10000-18000Lx),将遮阳网揭去一层;后期(烟苗5片真叶后适宜光照12000-30000Lx),完 全揭去遮阳网,保证光照强度。

The floating system of flue-cured seedlings is an adoption to have no the soil facilities the roasting of cultivation principle the smoke to teach the new technique of seedling. This experiments to pass two years many times and again and again on trial, and study the different light to shine on the strength to influence roast smoke afloat taught seedling grew strengthen seedling the function.The strength of light was different at differ time. At early time, from germination to 2 leaves of seedling, the best light strength was 4000-10000 Lx and covered 1 layer of black plastic. The 75% of light was shed. At middle time, 2 leaves of seedling, the best light strength was 10000-18000 Lx and uncovered 1 layer of black plastic. And the later time, 5 leaves of seedling, the best light strength was 12000-30000Lx and uncovered all the plastics. Guarantee the light to shine on the strength.