CAJ | 학술논문

为解决立体育苗模式中层间遮阴导致的烟苗生长发育不良问题，在层间设置了不同光源组合并研究其对烟苗根系生长的影响。结果表明：①层间遮阴通过补光能明显提高烟苗根系活力、吸收面积及物质积累量，在19.5～92.6μmol·m-2·s-1光强范围内，烟苗第3片真叶发生期后根系活力、吸收面积及物质积累量与光辐射强度呈正相关，光强愈大，根系生理指标增加幅度愈大。②蓝红LED灯头比例为2∶1的处理，在第3片真叶发生期烟苗根系活力高于层间遮阴未采取补光措施的处理（CK2）73.5%，至第6片真叶发生期仍高于CK210.6%；根系总吸收面积在烟苗第2至第6片真叶发生期高于CK220.1%～36.2%，根系活跃吸收面积高于CK237.5%～56.2%；烟苗第4至第6片真叶发生期根鲜质量高于CK211.6%～22.7%，根干质量高于CK211.3%～20.1%。因此，在烟草立体育苗模式下采用的适宜补光措施为蓝红LED灯头比例为2∶1的补充光源，功率16 W，光源距烟苗50 cm。
위해결입체육묘모식중층간차음도치적연묘생장발육불량문제，재층간설치료불동광원조합병연구기대연묘근계생장적영향。결과표명：①층간차음통과보광능명현제고연묘근계활력、흡수면적급물질적루량，재19.5～92.6μmol·m-2·s-1광강범위내，연묘제3편진협발생기후근계활력、흡수면적급물질적루량여광복사강도정정상관，광강유대，근계생리지표증가폭도유대。②람홍LED등두비례위2∶1적처리，재제3편진협발생기연묘근계활력고우층간차음미채취보광조시적처리（CK2）73.5%，지제6편진협발생기잉고우CK210.6%；근계총흡수면적재연묘제2지제6편진협발생기고우CK220.1%～36.2%，근계활약흡수면적고우CK237.5%～56.2%；연묘제4지제6편진협발생기근선질량고우CK211.6%～22.7%，근간질량고우CK211.3%～20.1%。인차，재연초입체육묘모식하채용적괄의보광조시위람홍LED등두비례위2∶1적보충광원，공솔16 W，광원거연묘50 cm。
In a multilayer seedling culturing system, the racks interrupt natural sunlight irradiation, it restrains the proper growth of tobacco seedlings, therefore different additional light source combinations were arranged between layers to study their influences on the growth of seedling root systems. The results showed that: 1) The activity, total absorption area, active absorption area and matter accumulation of seedling root systems were promoted by additional light irradiation; within the light radiation intensity of 19.5-92.6 μmol·m-2·s-1, these physio-logical indexes of root system positively correlated to light radiation intensity after the emergence of the third true leaf. 2) Appropriate ratio of blue/red LED emitters was 2∶1, power 16 W, the distance between light source and tobacco seedlings 50 cm; under such conditions, the activity of root system was 73.5% higher at the third true leaf emergence stage comparing with the treatment without light addition (CK2), which was still 10.6% higher at the sixth true leaf emergence stage; at the stage the second to the sixth true leaves emergence, the total absorption area of root system was 20.1%-36.2% higher, and the active absorption area was 37.5%-56.2%higher than CK2; at the stage the fourth to the sixth true leaves emergence, the fresh weight of roots was 11.6%-22.7% higher, and the dry weight was 11.3%-20.1% higher than CK2.