摘要
在环境可控的密闭植物工厂内,将定植后的生菜一天中18 h光期均分为6段,分别用T1(0:00-3:00)、T2(3:00-6:00)、T3(6:00-9:00)、T4(9:00-12:00)、T5(12:00-15:00)、T6(15:00-18:00)表示,研究了4种光强模式(CK:恒定光强处理;L1:光强先升高后降低的光照处理;L2:强弱光交替的光照处理;L3:光强先降低后升高的光照处理)对水培生菜生长和品质的影响。结果表明:处理7 d后,与其他处理相比,CK处理提高了地上部鲜重、根鲜重和叶面积,SPAD(Soil and Plant Analyzer Development)与其他各处理无显著性差异;与CK处理相比,处理14 d和21 d后L1、L2、L3地上部鲜重、根鲜重和叶面积均无显著性差异,各处理在14 d的SPAD无显著性差异,在处理21 d后,L2、L3的SPAD显著高于L1和L2。处理7 d后,L1处理促进了可溶性糖、可溶性蛋白的积累,同时降低了硝酸盐含量;与CK相比,其他各处理均提高了抗坏血酸含量、总酚含量和类黄酮含量。处理14 d后,L1处理促进了抗坏血酸、总酚、类黄酮的积累,降低了硝酸盐含量;与其他各处理相比,L3处理显著提高了HO含量。处理21 d后L1的可溶性糖含量显著高于其他各处理,其硝酸盐含量显著低于L2、L3,达到最小值;CK处理的可溶性蛋白含量显著低于L1和L2,L1达到最大值;处理21 d后各处理淀粉含量无显著性差异,CK处理的抗坏血酸含量显著低于L1和L3,并且丙二醛(MDA)含量显著高于其他各处理。总之,在相同日累计光积分(Daily Light Integral, DLI)条件下,L1处理对其生物量无显著提高,但能够明显改善水培生菜的品质,LED红蓝光光强日变化模式运用于植物工厂生菜对提高品质的潜力较大。
In a closed plant factory with controllable environment, the 18 h light period of transplanting lettuce was divided into 6 parts. Represented by T1(0:00-3:00), T2(3:00-6:00), T3(6:00-9:00), T4(9:00-12:00), T5(12:00-15:00) and T6(15:00-18:00),the effects of four light intensity modes(CK: constant light intensity treatment;L1:light intensity increased first and then decreased;L2:light processing with alternating strong and weak light;L3:light intensity first decreased and then increased) on growth and quality of hydroponic lettuce were investigated. The results showed that after 7 days of treatment, the shoot fresh weight, root fresh weight and leaf area of CK treatment were increased compared with other treatments, but SPAD(Soil and Plant Analyzer Development) had no significant difference between CK treatment and other treatments. Compared with CK treatment, there were no significant differences in the shoot fresh weight, root fresh weight and leaf area of L1, L2 and L3 after 14 d and 21 d, and there was no significant difference in SPAD of each treatment at 14 d. After 21 d, SPAD of L2 and L3 was significantly higher than that of L1 and L2. After 7 days of treatment, L1 promoted the accumulation of soluble sugar and soluble protein, and decreased the content of nitrate. Compared with CK, other treatments increased the content of ascorbic acid, total phenol and flavonoid. After 14 days of treatment, L1 promoted the accumulation of ascorbic acid, total phenols and flavonoids, and decreased the content of nitrate. Compared with other treatments, L3 treatment significantly increased the content of HO. After 21 days, the soluble sugar content of L1 was significantly higher than that of other treatments, and the nitrate content of L1 was significantly lower than that of L2 and L3, reaching the minimum value. The soluble protein content of CK treatment was significantly lower than that of L1 and L2, and L1 reached the maximum value. After 21 d treatment, there was no significant difference in starch content among all t
作者
王奇
刘文科
WANG Qi;LIU Wenke(Institute of Agricultural Environment and Sustainable Development,Chinese Academy of Agricultural Sciences,Beijing 100081,China;Key Laboratory of Energy Conservation and Waste Treatment of Facility Agriculture,Ministry of Agriculture and Rural Areas,Beijing 100081,China)
出处
《中国照明电器》
2022年第3期6-12,35,共8页
China Light & Lighting
基金
河北省重点研发计划项目(20327211D)。
关键词
LED红蓝光
光强变化模式
生菜
生物量
品质
抗氧化能力
LED red and blue light
light intensity variation patterns
hydroponic lettuce
biomass
quality
antioxidant capacity
