LED灯光照条件下营养液浓度对生菜生长的影响  

Effect of Different Nutrition Solution Concentrations on Growth of Lettuce Under LED Light Condition

作　　者：齐敬伟 武占会[2,3] 刘明池[2,3] 季延海[2,3] 李青云[1] 

机构地区：[1]河北农业大学园艺学院,河北保定071000 [2]北京市农林科学院蔬菜研究中心,北京100097 [3]农业部都市农业(北方)重点实验室,北京100097

出　　处：《北方园艺》2015年第18期67-70,共4页Northern Horticulture

基　　金：国家"863"计划资助项目(2013AA103005-03);国家科技支撑计划资助项目(2014BAD05B05-04);北京市农林科学院设施蔬菜无土栽培科技创新团队建设资助项目(2013-2015);北京市农林科学院科技创新基金资助项目(CXJJ201306);农业部公益性行业科研专项资助项目(201303014-03)

摘　　要：以奶油生菜为试材,在LED灯光照条件下水培生菜,研究了不同营养液浓度（日本山崎生菜配方的EC值0.8、1.0、1.2、1.4、1.6、1.8mS/cm）对生菜生长的影响。结果表明：1.0mS/cm和1.2mS/cm营养液浓度处理下奶油生菜地上部鲜重和干重、根鲜重和干重、叶片长度及叶片数最大,而1.8mS/cm处理上述指标最小。生菜体内的硝酸盐积累量随着营养液浓度的提高而增加。综合分析,EC值在1.0-1.2mS/cm水培生菜效果最佳。Taking butter head lettuce as experimental material,effect of different nutrition solution（0.8mS/cm,1.0mS/cm,1.2mS/cm,1.4mS/cm,1.6mS/cm,1.8mS/cm）Yamazaki formula on growth of lettuce were studied under the LED light conditions.The results showed that plants had maximal fresh and dry weight of shoots and roots,leaf length and the number of leaves under 1.0mS/cm and 1.2mS/cm concentration treatments;while those were the lowest under 1.8mS/cm.It indicated that nitrate accumulation of lettuce increased with increasing of nutrient solution concentration.Based on the comprehensive analysis,EC value in 1.0-1.2 mS/cm was the optimal concentration for hydroponic lettuce.

关 键 词：LED 营养液浓度 生菜 生长 

分 类 号：S636.906.2[农业科学—蔬菜学]