摘要
为解决湖南冬季大棚育苗低温寡照的障碍,研究光照强度对烟苗生长及主要生理指标的影响。在水温恒定条件下分别采用LED蓝:红=1:1的配比组合灯补光(补光强度分别为3000、4500、6000lx),结果表明:随光照强度的增加,烟苗的出叶天数减少,而叶片生长速率加快,各处理存在显著差异;补光强度达到6000lx,烟苗茎粗,茎高、干鲜重和干鲜比大,幼苗干物质积累最多;质体色素和根系活力受光照强度影响较大,其中叶绿素a、叶绿素b、类胡萝卜素和根系活力随光照强度增强而升高,而叶绿素a/b比值减少,表明补光有利于培育烟草壮苗,可以提高成苗素质。
In order to solve disorder by cultivating tobacco seeding with the shed nursery in low temperature and weak light of winter in Hunan,it was studied for effect on light intensity to growth and main physiological index of the tobacco seeding.Tests were separately carried out with the light emitting diodes in proportion of blue：red =1：1（supply light intensity was respectively 3000,4500 and 6000 lx）to supply light of tobacco seeding by combination light in water temperature constant conditions.Results showed that growing leaves day of tobacco seeding decreased and blade growth rate of tobacco seeding accelerated,with the increase of light intensity.The treatment existed significant different.Supplying light intensity reached 6000 lx,stem circumference of tobacco was stout and height,and dry fresh weight and dry fresh ratio was high,and seeding dry matter was accumulated most.Plastid pigment and root activity were affected by light intensity,including chlorophyll a,chlorophyll b,carotenoids and root activity increased with light intensity enhancement,but the chlorophyll a/b ratio decreased.It showed that supplying light was helpful to cultivate tobacco seedling and to improve tobacco seedling quality.
出处
《中国农学通报》
CSCD
2013年第7期76-81,共6页
Chinese Agricultural Science Bulletin
基金
湖南省烟草公司资助研究项目"提高湖南工厂化育苗质量及效益新技术研究"(11-13Aa10)
关键词
主要生理指标
LED灯
光照强度
烟苗
根系活力
main physiological index
light emitting diodes
light intensity
tobacco seeding
root activity
